(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
function _interopRequireDefault(obj) {
  return obj && obj.__esModule ? obj : {
    "default": obj
  };
}

module.exports = _interopRequireDefault;
},{}],2:[function(require,module,exports){
/*!
  Copyright (c) 2017 Jed Watson.
  Licensed under the MIT License (MIT), see
  http://jedwatson.github.io/classnames
*/
/* global define */

(function () {
	'use strict';

	var hasOwn = {}.hasOwnProperty;

	function classNames () {
		var classes = [];

		for (var i = 0; i < arguments.length; i++) {
			var arg = arguments[i];
			if (!arg) continue;

			var argType = typeof arg;

			if (argType === 'string' || argType === 'number') {
				classes.push(arg);
			} else if (Array.isArray(arg) && arg.length) {
				var inner = classNames.apply(null, arg);
				if (inner) {
					classes.push(inner);
				}
			} else if (argType === 'object') {
				for (var key in arg) {
					if (hasOwn.call(arg, key) && arg[key]) {
						classes.push(key);
					}
				}
			}
		}

		return classes.join(' ');
	}

	if (typeof module !== 'undefined' && module.exports) {
		classNames.default = classNames;
		module.exports = classNames;
	} else if (typeof define === 'function' && typeof define.amd === 'object' && define.amd) {
		// register as 'classnames', consistent with npm package name
		define('classnames', [], function () {
			return classNames;
		});
	} else {
		window.classNames = classNames;
	}
}());

},{}],3:[function(require,module,exports){
// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/5/LICENSE

// This is CodeMirror (https://codemirror.net/5), a code editor
// implemented in JavaScript on top of the browser's DOM.
//
// You can find some technical background for some of the code below
// at http://marijnhaverbeke.nl/blog/#cm-internals .

(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  typeof define === 'function' && define.amd ? define(factory) :
  (global = global || self, global.CodeMirror = factory());
}(this, (function () { 'use strict';

  // Kludges for bugs and behavior differences that can't be feature
  // detected are enabled based on userAgent etc sniffing.
  var userAgent = navigator.userAgent;
  var platform = navigator.platform;

  var gecko = /gecko\/\d/i.test(userAgent);
  var ie_upto10 = /MSIE \d/.test(userAgent);
  var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
  var edge = /Edge\/(\d+)/.exec(userAgent);
  var ie = ie_upto10 || ie_11up || edge;
  var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1]);
  var webkit = !edge && /WebKit\//.test(userAgent);
  var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
  var chrome = !edge && /Chrome\/(\d+)/.exec(userAgent);
  var chrome_version = chrome && +chrome[1];
  var presto = /Opera\//.test(userAgent);
  var safari = /Apple Computer/.test(navigator.vendor);
  var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
  var phantom = /PhantomJS/.test(userAgent);

  var ios = safari && (/Mobile\/\w+/.test(userAgent) || navigator.maxTouchPoints > 2);
  var android = /Android/.test(userAgent);
  // This is woefully incomplete. Suggestions for alternative methods welcome.
  var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
  var mac = ios || /Mac/.test(platform);
  var chromeOS = /\bCrOS\b/.test(userAgent);
  var windows = /win/i.test(platform);

  var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
  if (presto_version) { presto_version = Number(presto_version[1]); }
  if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
  // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
  var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
  var captureRightClick = gecko || (ie && ie_version >= 9);

  function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }

  var rmClass = function(node, cls) {
    var current = node.className;
    var match = classTest(cls).exec(current);
    if (match) {
      var after = current.slice(match.index + match[0].length);
      node.className = current.slice(0, match.index) + (after ? match[1] + after : "");
    }
  };

  function removeChildren(e) {
    for (var count = e.childNodes.length; count > 0; --count)
      { e.removeChild(e.firstChild); }
    return e
  }

  function removeChildrenAndAdd(parent, e) {
    return removeChildren(parent).appendChild(e)
  }

  function elt(tag, content, className, style) {
    var e = document.createElement(tag);
    if (className) { e.className = className; }
    if (style) { e.style.cssText = style; }
    if (typeof content == "string") { e.appendChild(document.createTextNode(content)); }
    else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]); } }
    return e
  }
  // wrapper for elt, which removes the elt from the accessibility tree
  function eltP(tag, content, className, style) {
    var e = elt(tag, content, className, style);
    e.setAttribute("role", "presentation");
    return e
  }

  var range;
  if (document.createRange) { range = function(node, start, end, endNode) {
    var r = document.createRange();
    r.setEnd(endNode || node, end);
    r.setStart(node, start);
    return r
  }; }
  else { range = function(node, start, end) {
    var r = document.body.createTextRange();
    try { r.moveToElementText(node.parentNode); }
    catch(e) { return r }
    r.collapse(true);
    r.moveEnd("character", end);
    r.moveStart("character", start);
    return r
  }; }

  function contains(parent, child) {
    if (child.nodeType == 3) // Android browser always returns false when child is a textnode
      { child = child.parentNode; }
    if (parent.contains)
      { return parent.contains(child) }
    do {
      if (child.nodeType == 11) { child = child.host; }
      if (child == parent) { return true }
    } while (child = child.parentNode)
  }

  function activeElt(doc) {
    // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
    // IE < 10 will throw when accessed while the page is loading or in an iframe.
    // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
    var activeElement;
    try {
      activeElement = doc.activeElement;
    } catch(e) {
      activeElement = doc.body || null;
    }
    while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
      { activeElement = activeElement.shadowRoot.activeElement; }
    return activeElement
  }

  function addClass(node, cls) {
    var current = node.className;
    if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls; }
  }
  function joinClasses(a, b) {
    var as = a.split(" ");
    for (var i = 0; i < as.length; i++)
      { if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i]; } }
    return b
  }

  var selectInput = function(node) { node.select(); };
  if (ios) // Mobile Safari apparently has a bug where select() is broken.
    { selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; }; }
  else if (ie) // Suppress mysterious IE10 errors
    { selectInput = function(node) { try { node.select(); } catch(_e) {} }; }

  function doc(cm) { return cm.display.wrapper.ownerDocument }

  function win(cm) { return doc(cm).defaultView }

  function bind(f) {
    var args = Array.prototype.slice.call(arguments, 1);
    return function(){return f.apply(null, args)}
  }

  function copyObj(obj, target, overwrite) {
    if (!target) { target = {}; }
    for (var prop in obj)
      { if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
        { target[prop] = obj[prop]; } }
    return target
  }

  // Counts the column offset in a string, taking tabs into account.
  // Used mostly to find indentation.
  function countColumn(string, end, tabSize, startIndex, startValue) {
    if (end == null) {
      end = string.search(/[^\s\u00a0]/);
      if (end == -1) { end = string.length; }
    }
    for (var i = startIndex || 0, n = startValue || 0;;) {
      var nextTab = string.indexOf("\t", i);
      if (nextTab < 0 || nextTab >= end)
        { return n + (end - i) }
      n += nextTab - i;
      n += tabSize - (n % tabSize);
      i = nextTab + 1;
    }
  }

  var Delayed = function() {
    this.id = null;
    this.f = null;
    this.time = 0;
    this.handler = bind(this.onTimeout, this);
  };
  Delayed.prototype.onTimeout = function (self) {
    self.id = 0;
    if (self.time <= +new Date) {
      self.f();
    } else {
      setTimeout(self.handler, self.time - +new Date);
    }
  };
  Delayed.prototype.set = function (ms, f) {
    this.f = f;
    var time = +new Date + ms;
    if (!this.id || time < this.time) {
      clearTimeout(this.id);
      this.id = setTimeout(this.handler, ms);
      this.time = time;
    }
  };

  function indexOf(array, elt) {
    for (var i = 0; i < array.length; ++i)
      { if (array[i] == elt) { return i } }
    return -1
  }

  // Number of pixels added to scroller and sizer to hide scrollbar
  var scrollerGap = 50;

  // Returned or thrown by various protocols to signal 'I'm not
  // handling this'.
  var Pass = {toString: function(){return "CodeMirror.Pass"}};

  // Reused option objects for setSelection & friends
  var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"};

  // The inverse of countColumn -- find the offset that corresponds to
  // a particular column.
  function findColumn(string, goal, tabSize) {
    for (var pos = 0, col = 0;;) {
      var nextTab = string.indexOf("\t", pos);
      if (nextTab == -1) { nextTab = string.length; }
      var skipped = nextTab - pos;
      if (nextTab == string.length || col + skipped >= goal)
        { return pos + Math.min(skipped, goal - col) }
      col += nextTab - pos;
      col += tabSize - (col % tabSize);
      pos = nextTab + 1;
      if (col >= goal) { return pos }
    }
  }

  var spaceStrs = [""];
  function spaceStr(n) {
    while (spaceStrs.length <= n)
      { spaceStrs.push(lst(spaceStrs) + " "); }
    return spaceStrs[n]
  }

  function lst(arr) { return arr[arr.length-1] }

  function map(array, f) {
    var out = [];
    for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i); }
    return out
  }

  function insertSorted(array, value, score) {
    var pos = 0, priority = score(value);
    while (pos < array.length && score(array[pos]) <= priority) { pos++; }
    array.splice(pos, 0, value);
  }

  function nothing() {}

  function createObj(base, props) {
    var inst;
    if (Object.create) {
      inst = Object.create(base);
    } else {
      nothing.prototype = base;
      inst = new nothing();
    }
    if (props) { copyObj(props, inst); }
    return inst
  }

  var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
  function isWordCharBasic(ch) {
    return /\w/.test(ch) || ch > "\x80" &&
      (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
  }
  function isWordChar(ch, helper) {
    if (!helper) { return isWordCharBasic(ch) }
    if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
    return helper.test(ch)
  }

  function isEmpty(obj) {
    for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
    return true
  }

  // Extending unicode characters. A series of a non-extending char +
  // any number of extending chars is treated as a single unit as far
  // as editing and measuring is concerned. This is not fully correct,
  // since some scripts/fonts/browsers also treat other configurations
  // of code points as a group.
  var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
  function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }

  // Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
  function skipExtendingChars(str, pos, dir) {
    while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir; }
    return pos
  }

  // Returns the value from the range [`from`; `to`] that satisfies
  // `pred` and is closest to `from`. Assumes that at least `to`
  // satisfies `pred`. Supports `from` being greater than `to`.
  function findFirst(pred, from, to) {
    // At any point we are certain `to` satisfies `pred`, don't know
    // whether `from` does.
    var dir = from > to ? -1 : 1;
    for (;;) {
      if (from == to) { return from }
      var midF = (from + to) / 2, mid = dir < 0 ? Math.ceil(midF) : Math.floor(midF);
      if (mid == from) { return pred(mid) ? from : to }
      if (pred(mid)) { to = mid; }
      else { from = mid + dir; }
    }
  }

  // BIDI HELPERS

  function iterateBidiSections(order, from, to, f) {
    if (!order) { return f(from, to, "ltr", 0) }
    var found = false;
    for (var i = 0; i < order.length; ++i) {
      var part = order[i];
      if (part.from < to && part.to > from || from == to && part.to == from) {
        f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr", i);
        found = true;
      }
    }
    if (!found) { f(from, to, "ltr"); }
  }

  var bidiOther = null;
  function getBidiPartAt(order, ch, sticky) {
    var found;
    bidiOther = null;
    for (var i = 0; i < order.length; ++i) {
      var cur = order[i];
      if (cur.from < ch && cur.to > ch) { return i }
      if (cur.to == ch) {
        if (cur.from != cur.to && sticky == "before") { found = i; }
        else { bidiOther = i; }
      }
      if (cur.from == ch) {
        if (cur.from != cur.to && sticky != "before") { found = i; }
        else { bidiOther = i; }
      }
    }
    return found != null ? found : bidiOther
  }

  // Bidirectional ordering algorithm
  // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
  // that this (partially) implements.

  // One-char codes used for character types:
  // L (L):   Left-to-Right
  // R (R):   Right-to-Left
  // r (AL):  Right-to-Left Arabic
  // 1 (EN):  European Number
  // + (ES):  European Number Separator
  // % (ET):  European Number Terminator
  // n (AN):  Arabic Number
  // , (CS):  Common Number Separator
  // m (NSM): Non-Spacing Mark
  // b (BN):  Boundary Neutral
  // s (B):   Paragraph Separator
  // t (S):   Segment Separator
  // w (WS):  Whitespace
  // N (ON):  Other Neutrals

  // Returns null if characters are ordered as they appear
  // (left-to-right), or an array of sections ({from, to, level}
  // objects) in the order in which they occur visually.
  var bidiOrdering = (function() {
    // Character types for codepoints 0 to 0xff
    var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN";
    // Character types for codepoints 0x600 to 0x6f9
    var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111";
    function charType(code) {
      if (code <= 0xf7) { return lowTypes.charAt(code) }
      else if (0x590 <= code && code <= 0x5f4) { return "R" }
      else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
      else if (0x6ee <= code && code <= 0x8ac) { return "r" }
      else if (0x2000 <= code && code <= 0x200b) { return "w" }
      else if (code == 0x200c) { return "b" }
      else { return "L" }
    }

    var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
    var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;

    function BidiSpan(level, from, to) {
      this.level = level;
      this.from = from; this.to = to;
    }

    return function(str, direction) {
      var outerType = direction == "ltr" ? "L" : "R";

      if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
      var len = str.length, types = [];
      for (var i = 0; i < len; ++i)
        { types.push(charType(str.charCodeAt(i))); }

      // W1. Examine each non-spacing mark (NSM) in the level run, and
      // change the type of the NSM to the type of the previous
      // character. If the NSM is at the start of the level run, it will
      // get the type of sor.
      for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
        var type = types[i$1];
        if (type == "m") { types[i$1] = prev; }
        else { prev = type; }
      }

      // W2. Search backwards from each instance of a European number
      // until the first strong type (R, L, AL, or sor) is found. If an
      // AL is found, change the type of the European number to Arabic
      // number.
      // W3. Change all ALs to R.
      for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
        var type$1 = types[i$2];
        if (type$1 == "1" && cur == "r") { types[i$2] = "n"; }
        else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R"; } }
      }

      // W4. A single European separator between two European numbers
      // changes to a European number. A single common separator between
      // two numbers of the same type changes to that type.
      for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
        var type$2 = types[i$3];
        if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1"; }
        else if (type$2 == "," && prev$1 == types[i$3+1] &&
                 (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1; }
        prev$1 = type$2;
      }

      // W5. A sequence of European terminators adjacent to European
      // numbers changes to all European numbers.
      // W6. Otherwise, separators and terminators change to Other
      // Neutral.
      for (var i$4 = 0; i$4 < len; ++i$4) {
        var type$3 = types[i$4];
        if (type$3 == ",") { types[i$4] = "N"; }
        else if (type$3 == "%") {
          var end = (void 0);
          for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
          var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
          for (var j = i$4; j < end; ++j) { types[j] = replace; }
          i$4 = end - 1;
        }
      }

      // W7. Search backwards from each instance of a European number
      // until the first strong type (R, L, or sor) is found. If an L is
      // found, then change the type of the European number to L.
      for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
        var type$4 = types[i$5];
        if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L"; }
        else if (isStrong.test(type$4)) { cur$1 = type$4; }
      }

      // N1. A sequence of neutrals takes the direction of the
      // surrounding strong text if the text on both sides has the same
      // direction. European and Arabic numbers act as if they were R in
      // terms of their influence on neutrals. Start-of-level-run (sor)
      // and end-of-level-run (eor) are used at level run boundaries.
      // N2. Any remaining neutrals take the embedding direction.
      for (var i$6 = 0; i$6 < len; ++i$6) {
        if (isNeutral.test(types[i$6])) {
          var end$1 = (void 0);
          for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
          var before = (i$6 ? types[i$6-1] : outerType) == "L";
          var after = (end$1 < len ? types[end$1] : outerType) == "L";
          var replace$1 = before == after ? (before ? "L" : "R") : outerType;
          for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1; }
          i$6 = end$1 - 1;
        }
      }

      // Here we depart from the documented algorithm, in order to avoid
      // building up an actual levels array. Since there are only three
      // levels (0, 1, 2) in an implementation that doesn't take
      // explicit embedding into account, we can build up the order on
      // the fly, without following the level-based algorithm.
      var order = [], m;
      for (var i$7 = 0; i$7 < len;) {
        if (countsAsLeft.test(types[i$7])) {
          var start = i$7;
          for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
          order.push(new BidiSpan(0, start, i$7));
        } else {
          var pos = i$7, at = order.length, isRTL = direction == "rtl" ? 1 : 0;
          for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
          for (var j$2 = pos; j$2 < i$7;) {
            if (countsAsNum.test(types[j$2])) {
              if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)); at += isRTL; }
              var nstart = j$2;
              for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
              order.splice(at, 0, new BidiSpan(2, nstart, j$2));
              at += isRTL;
              pos = j$2;
            } else { ++j$2; }
          }
          if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)); }
        }
      }
      if (direction == "ltr") {
        if (order[0].level == 1 && (m = str.match(/^\s+/))) {
          order[0].from = m[0].length;
          order.unshift(new BidiSpan(0, 0, m[0].length));
        }
        if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
          lst(order).to -= m[0].length;
          order.push(new BidiSpan(0, len - m[0].length, len));
        }
      }

      return direction == "rtl" ? order.reverse() : order
    }
  })();

  // Get the bidi ordering for the given line (and cache it). Returns
  // false for lines that are fully left-to-right, and an array of
  // BidiSpan objects otherwise.
  function getOrder(line, direction) {
    var order = line.order;
    if (order == null) { order = line.order = bidiOrdering(line.text, direction); }
    return order
  }

  // EVENT HANDLING

  // Lightweight event framework. on/off also work on DOM nodes,
  // registering native DOM handlers.

  var noHandlers = [];

  var on = function(emitter, type, f) {
    if (emitter.addEventListener) {
      emitter.addEventListener(type, f, false);
    } else if (emitter.attachEvent) {
      emitter.attachEvent("on" + type, f);
    } else {
      var map = emitter._handlers || (emitter._handlers = {});
      map[type] = (map[type] || noHandlers).concat(f);
    }
  };

  function getHandlers(emitter, type) {
    return emitter._handlers && emitter._handlers[type] || noHandlers
  }

  function off(emitter, type, f) {
    if (emitter.removeEventListener) {
      emitter.removeEventListener(type, f, false);
    } else if (emitter.detachEvent) {
      emitter.detachEvent("on" + type, f);
    } else {
      var map = emitter._handlers, arr = map && map[type];
      if (arr) {
        var index = indexOf(arr, f);
        if (index > -1)
          { map[type] = arr.slice(0, index).concat(arr.slice(index + 1)); }
      }
    }
  }

  function signal(emitter, type /*, values...*/) {
    var handlers = getHandlers(emitter, type);
    if (!handlers.length) { return }
    var args = Array.prototype.slice.call(arguments, 2);
    for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args); }
  }

  // The DOM events that CodeMirror handles can be overridden by
  // registering a (non-DOM) handler on the editor for the event name,
  // and preventDefault-ing the event in that handler.
  function signalDOMEvent(cm, e, override) {
    if (typeof e == "string")
      { e = {type: e, preventDefault: function() { this.defaultPrevented = true; }}; }
    signal(cm, override || e.type, cm, e);
    return e_defaultPrevented(e) || e.codemirrorIgnore
  }

  function signalCursorActivity(cm) {
    var arr = cm._handlers && cm._handlers.cursorActivity;
    if (!arr) { return }
    var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
    for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
      { set.push(arr[i]); } }
  }

  function hasHandler(emitter, type) {
    return getHandlers(emitter, type).length > 0
  }

  // Add on and off methods to a constructor's prototype, to make
  // registering events on such objects more convenient.
  function eventMixin(ctor) {
    ctor.prototype.on = function(type, f) {on(this, type, f);};
    ctor.prototype.off = function(type, f) {off(this, type, f);};
  }

  // Due to the fact that we still support jurassic IE versions, some
  // compatibility wrappers are needed.

  function e_preventDefault(e) {
    if (e.preventDefault) { e.preventDefault(); }
    else { e.returnValue = false; }
  }
  function e_stopPropagation(e) {
    if (e.stopPropagation) { e.stopPropagation(); }
    else { e.cancelBubble = true; }
  }
  function e_defaultPrevented(e) {
    return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
  }
  function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}

  function e_target(e) {return e.target || e.srcElement}
  function e_button(e) {
    var b = e.which;
    if (b == null) {
      if (e.button & 1) { b = 1; }
      else if (e.button & 2) { b = 3; }
      else if (e.button & 4) { b = 2; }
    }
    if (mac && e.ctrlKey && b == 1) { b = 3; }
    return b
  }

  // Detect drag-and-drop
  var dragAndDrop = function() {
    // There is *some* kind of drag-and-drop support in IE6-8, but I
    // couldn't get it to work yet.
    if (ie && ie_version < 9) { return false }
    var div = elt('div');
    return "draggable" in div || "dragDrop" in div
  }();

  var zwspSupported;
  function zeroWidthElement(measure) {
    if (zwspSupported == null) {
      var test = elt("span", "\u200b");
      removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
      if (measure.firstChild.offsetHeight != 0)
        { zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8); }
    }
    var node = zwspSupported ? elt("span", "\u200b") :
      elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
    node.setAttribute("cm-text", "");
    return node
  }

  // Feature-detect IE's crummy client rect reporting for bidi text
  var badBidiRects;
  function hasBadBidiRects(measure) {
    if (badBidiRects != null) { return badBidiRects }
    var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
    var r0 = range(txt, 0, 1).getBoundingClientRect();
    var r1 = range(txt, 1, 2).getBoundingClientRect();
    removeChildren(measure);
    if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
    return badBidiRects = (r1.right - r0.right < 3)
  }

  // See if "".split is the broken IE version, if so, provide an
  // alternative way to split lines.
  var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
    var pos = 0, result = [], l = string.length;
    while (pos <= l) {
      var nl = string.indexOf("\n", pos);
      if (nl == -1) { nl = string.length; }
      var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
      var rt = line.indexOf("\r");
      if (rt != -1) {
        result.push(line.slice(0, rt));
        pos += rt + 1;
      } else {
        result.push(line);
        pos = nl + 1;
      }
    }
    return result
  } : function (string) { return string.split(/\r\n?|\n/); };

  var hasSelection = window.getSelection ? function (te) {
    try { return te.selectionStart != te.selectionEnd }
    catch(e) { return false }
  } : function (te) {
    var range;
    try {range = te.ownerDocument.selection.createRange();}
    catch(e) {}
    if (!range || range.parentElement() != te) { return false }
    return range.compareEndPoints("StartToEnd", range) != 0
  };

  var hasCopyEvent = (function () {
    var e = elt("div");
    if ("oncopy" in e) { return true }
    e.setAttribute("oncopy", "return;");
    return typeof e.oncopy == "function"
  })();

  var badZoomedRects = null;
  function hasBadZoomedRects(measure) {
    if (badZoomedRects != null) { return badZoomedRects }
    var node = removeChildrenAndAdd(measure, elt("span", "x"));
    var normal = node.getBoundingClientRect();
    var fromRange = range(node, 0, 1).getBoundingClientRect();
    return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
  }

  // Known modes, by name and by MIME
  var modes = {}, mimeModes = {};

  // Extra arguments are stored as the mode's dependencies, which is
  // used by (legacy) mechanisms like loadmode.js to automatically
  // load a mode. (Preferred mechanism is the require/define calls.)
  function defineMode(name, mode) {
    if (arguments.length > 2)
      { mode.dependencies = Array.prototype.slice.call(arguments, 2); }
    modes[name] = mode;
  }

  function defineMIME(mime, spec) {
    mimeModes[mime] = spec;
  }

  // Given a MIME type, a {name, ...options} config object, or a name
  // string, return a mode config object.
  function resolveMode(spec) {
    if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
      spec = mimeModes[spec];
    } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
      var found = mimeModes[spec.name];
      if (typeof found == "string") { found = {name: found}; }
      spec = createObj(found, spec);
      spec.name = found.name;
    } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
      return resolveMode("application/xml")
    } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
      return resolveMode("application/json")
    }
    if (typeof spec == "string") { return {name: spec} }
    else { return spec || {name: "null"} }
  }

  // Given a mode spec (anything that resolveMode accepts), find and
  // initialize an actual mode object.
  function getMode(options, spec) {
    spec = resolveMode(spec);
    var mfactory = modes[spec.name];
    if (!mfactory) { return getMode(options, "text/plain") }
    var modeObj = mfactory(options, spec);
    if (modeExtensions.hasOwnProperty(spec.name)) {
      var exts = modeExtensions[spec.name];
      for (var prop in exts) {
        if (!exts.hasOwnProperty(prop)) { continue }
        if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop]; }
        modeObj[prop] = exts[prop];
      }
    }
    modeObj.name = spec.name;
    if (spec.helperType) { modeObj.helperType = spec.helperType; }
    if (spec.modeProps) { for (var prop$1 in spec.modeProps)
      { modeObj[prop$1] = spec.modeProps[prop$1]; } }

    return modeObj
  }

  // This can be used to attach properties to mode objects from
  // outside the actual mode definition.
  var modeExtensions = {};
  function extendMode(mode, properties) {
    var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
    copyObj(properties, exts);
  }

  function copyState(mode, state) {
    if (state === true) { return state }
    if (mode.copyState) { return mode.copyState(state) }
    var nstate = {};
    for (var n in state) {
      var val = state[n];
      if (val instanceof Array) { val = val.concat([]); }
      nstate[n] = val;
    }
    return nstate
  }

  // Given a mode and a state (for that mode), find the inner mode and
  // state at the position that the state refers to.
  function innerMode(mode, state) {
    var info;
    while (mode.innerMode) {
      info = mode.innerMode(state);
      if (!info || info.mode == mode) { break }
      state = info.state;
      mode = info.mode;
    }
    return info || {mode: mode, state: state}
  }

  function startState(mode, a1, a2) {
    return mode.startState ? mode.startState(a1, a2) : true
  }

  // STRING STREAM

  // Fed to the mode parsers, provides helper functions to make
  // parsers more succinct.

  var StringStream = function(string, tabSize, lineOracle) {
    this.pos = this.start = 0;
    this.string = string;
    this.tabSize = tabSize || 8;
    this.lastColumnPos = this.lastColumnValue = 0;
    this.lineStart = 0;
    this.lineOracle = lineOracle;
  };

  StringStream.prototype.eol = function () {return this.pos >= this.string.length};
  StringStream.prototype.sol = function () {return this.pos == this.lineStart};
  StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
  StringStream.prototype.next = function () {
    if (this.pos < this.string.length)
      { return this.string.charAt(this.pos++) }
  };
  StringStream.prototype.eat = function (match) {
    var ch = this.string.charAt(this.pos);
    var ok;
    if (typeof match == "string") { ok = ch == match; }
    else { ok = ch && (match.test ? match.test(ch) : match(ch)); }
    if (ok) {++this.pos; return ch}
  };
  StringStream.prototype.eatWhile = function (match) {
    var start = this.pos;
    while (this.eat(match)){}
    return this.pos > start
  };
  StringStream.prototype.eatSpace = function () {
    var start = this.pos;
    while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this.pos; }
    return this.pos > start
  };
  StringStream.prototype.skipToEnd = function () {this.pos = this.string.length;};
  StringStream.prototype.skipTo = function (ch) {
    var found = this.string.indexOf(ch, this.pos);
    if (found > -1) {this.pos = found; return true}
  };
  StringStream.prototype.backUp = function (n) {this.pos -= n;};
  StringStream.prototype.column = function () {
    if (this.lastColumnPos < this.start) {
      this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
      this.lastColumnPos = this.start;
    }
    return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
  };
  StringStream.prototype.indentation = function () {
    return countColumn(this.string, null, this.tabSize) -
      (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
  };
  StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
    if (typeof pattern == "string") {
      var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; };
      var substr = this.string.substr(this.pos, pattern.length);
      if (cased(substr) == cased(pattern)) {
        if (consume !== false) { this.pos += pattern.length; }
        return true
      }
    } else {
      var match = this.string.slice(this.pos).match(pattern);
      if (match && match.index > 0) { return null }
      if (match && consume !== false) { this.pos += match[0].length; }
      return match
    }
  };
  StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
  StringStream.prototype.hideFirstChars = function (n, inner) {
    this.lineStart += n;
    try { return inner() }
    finally { this.lineStart -= n; }
  };
  StringStream.prototype.lookAhead = function (n) {
    var oracle = this.lineOracle;
    return oracle && oracle.lookAhead(n)
  };
  StringStream.prototype.baseToken = function () {
    var oracle = this.lineOracle;
    return oracle && oracle.baseToken(this.pos)
  };

  // Find the line object corresponding to the given line number.
  function getLine(doc, n) {
    n -= doc.first;
    if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
    var chunk = doc;
    while (!chunk.lines) {
      for (var i = 0;; ++i) {
        var child = chunk.children[i], sz = child.chunkSize();
        if (n < sz) { chunk = child; break }
        n -= sz;
      }
    }
    return chunk.lines[n]
  }

  // Get the part of a document between two positions, as an array of
  // strings.
  function getBetween(doc, start, end) {
    var out = [], n = start.line;
    doc.iter(start.line, end.line + 1, function (line) {
      var text = line.text;
      if (n == end.line) { text = text.slice(0, end.ch); }
      if (n == start.line) { text = text.slice(start.ch); }
      out.push(text);
      ++n;
    });
    return out
  }
  // Get the lines between from and to, as array of strings.
  function getLines(doc, from, to) {
    var out = [];
    doc.iter(from, to, function (line) { out.push(line.text); }); // iter aborts when callback returns truthy value
    return out
  }

  // Update the height of a line, propagating the height change
  // upwards to parent nodes.
  function updateLineHeight(line, height) {
    var diff = height - line.height;
    if (diff) { for (var n = line; n; n = n.parent) { n.height += diff; } }
  }

  // Given a line object, find its line number by walking up through
  // its parent links.
  function lineNo(line) {
    if (line.parent == null) { return null }
    var cur = line.parent, no = indexOf(cur.lines, line);
    for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
      for (var i = 0;; ++i) {
        if (chunk.children[i] == cur) { break }
        no += chunk.children[i].chunkSize();
      }
    }
    return no + cur.first
  }

  // Find the line at the given vertical position, using the height
  // information in the document tree.
  function lineAtHeight(chunk, h) {
    var n = chunk.first;
    outer: do {
      for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
        var child = chunk.children[i$1], ch = child.height;
        if (h < ch) { chunk = child; continue outer }
        h -= ch;
        n += child.chunkSize();
      }
      return n
    } while (!chunk.lines)
    var i = 0;
    for (; i < chunk.lines.length; ++i) {
      var line = chunk.lines[i], lh = line.height;
      if (h < lh) { break }
      h -= lh;
    }
    return n + i
  }

  function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}

  function lineNumberFor(options, i) {
    return String(options.lineNumberFormatter(i + options.firstLineNumber))
  }

  // A Pos instance represents a position within the text.
  function Pos(line, ch, sticky) {
    if ( sticky === void 0 ) sticky = null;

    if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
    this.line = line;
    this.ch = ch;
    this.sticky = sticky;
  }

  // Compare two positions, return 0 if they are the same, a negative
  // number when a is less, and a positive number otherwise.
  function cmp(a, b) { return a.line - b.line || a.ch - b.ch }

  function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }

  function copyPos(x) {return Pos(x.line, x.ch)}
  function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
  function minPos(a, b) { return cmp(a, b) < 0 ? a : b }

  // Most of the external API clips given positions to make sure they
  // actually exist within the document.
  function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
  function clipPos(doc, pos) {
    if (pos.line < doc.first) { return Pos(doc.first, 0) }
    var last = doc.first + doc.size - 1;
    if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
    return clipToLen(pos, getLine(doc, pos.line).text.length)
  }
  function clipToLen(pos, linelen) {
    var ch = pos.ch;
    if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
    else if (ch < 0) { return Pos(pos.line, 0) }
    else { return pos }
  }
  function clipPosArray(doc, array) {
    var out = [];
    for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]); }
    return out
  }

  var SavedContext = function(state, lookAhead) {
    this.state = state;
    this.lookAhead = lookAhead;
  };

  var Context = function(doc, state, line, lookAhead) {
    this.state = state;
    this.doc = doc;
    this.line = line;
    this.maxLookAhead = lookAhead || 0;
    this.baseTokens = null;
    this.baseTokenPos = 1;
  };

  Context.prototype.lookAhead = function (n) {
    var line = this.doc.getLine(this.line + n);
    if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n; }
    return line
  };

  Context.prototype.baseToken = function (n) {
    if (!this.baseTokens) { return null }
    while (this.baseTokens[this.baseTokenPos] <= n)
      { this.baseTokenPos += 2; }
    var type = this.baseTokens[this.baseTokenPos + 1];
    return {type: type && type.replace(/( |^)overlay .*/, ""),
            size: this.baseTokens[this.baseTokenPos] - n}
  };

  Context.prototype.nextLine = function () {
    this.line++;
    if (this.maxLookAhead > 0) { this.maxLookAhead--; }
  };

  Context.fromSaved = function (doc, saved, line) {
    if (saved instanceof SavedContext)
      { return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
    else
      { return new Context(doc, copyState(doc.mode, saved), line) }
  };

  Context.prototype.save = function (copy) {
    var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state;
    return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
  };


  // Compute a style array (an array starting with a mode generation
  // -- for invalidation -- followed by pairs of end positions and
  // style strings), which is used to highlight the tokens on the
  // line.
  function highlightLine(cm, line, context, forceToEnd) {
    // A styles array always starts with a number identifying the
    // mode/overlays that it is based on (for easy invalidation).
    var st = [cm.state.modeGen], lineClasses = {};
    // Compute the base array of styles
    runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
            lineClasses, forceToEnd);
    var state = context.state;

    // Run overlays, adjust style array.
    var loop = function ( o ) {
      context.baseTokens = st;
      var overlay = cm.state.overlays[o], i = 1, at = 0;
      context.state = true;
      runMode(cm, line.text, overlay.mode, context, function (end, style) {
        var start = i;
        // Ensure there's a token end at the current position, and that i points at it
        while (at < end) {
          var i_end = st[i];
          if (i_end > end)
            { st.splice(i, 1, end, st[i+1], i_end); }
          i += 2;
          at = Math.min(end, i_end);
        }
        if (!style) { return }
        if (overlay.opaque) {
          st.splice(start, i - start, end, "overlay " + style);
          i = start + 2;
        } else {
          for (; start < i; start += 2) {
            var cur = st[start+1];
            st[start+1] = (cur ? cur + " " : "") + "overlay " + style;
          }
        }
      }, lineClasses);
      context.state = state;
      context.baseTokens = null;
      context.baseTokenPos = 1;
    };

    for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );

    return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
  }

  function getLineStyles(cm, line, updateFrontier) {
    if (!line.styles || line.styles[0] != cm.state.modeGen) {
      var context = getContextBefore(cm, lineNo(line));
      var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state);
      var result = highlightLine(cm, line, context);
      if (resetState) { context.state = resetState; }
      line.stateAfter = context.save(!resetState);
      line.styles = result.styles;
      if (result.classes) { line.styleClasses = result.classes; }
      else if (line.styleClasses) { line.styleClasses = null; }
      if (updateFrontier === cm.doc.highlightFrontier)
        { cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier); }
    }
    return line.styles
  }

  function getContextBefore(cm, n, precise) {
    var doc = cm.doc, display = cm.display;
    if (!doc.mode.startState) { return new Context(doc, true, n) }
    var start = findStartLine(cm, n, precise);
    var saved = start > doc.first && getLine(doc, start - 1).stateAfter;
    var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start);

    doc.iter(start, n, function (line) {
      processLine(cm, line.text, context);
      var pos = context.line;
      line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null;
      context.nextLine();
    });
    if (precise) { doc.modeFrontier = context.line; }
    return context
  }

  // Lightweight form of highlight -- proceed over this line and
  // update state, but don't save a style array. Used for lines that
  // aren't currently visible.
  function processLine(cm, text, context, startAt) {
    var mode = cm.doc.mode;
    var stream = new StringStream(text, cm.options.tabSize, context);
    stream.start = stream.pos = startAt || 0;
    if (text == "") { callBlankLine(mode, context.state); }
    while (!stream.eol()) {
      readToken(mode, stream, context.state);
      stream.start = stream.pos;
    }
  }

  function callBlankLine(mode, state) {
    if (mode.blankLine) { return mode.blankLine(state) }
    if (!mode.innerMode) { return }
    var inner = innerMode(mode, state);
    if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
  }

  function readToken(mode, stream, state, inner) {
    for (var i = 0; i < 10; i++) {
      if (inner) { inner[0] = innerMode(mode, state).mode; }
      var style = mode.token(stream, state);
      if (stream.pos > stream.start) { return style }
    }
    throw new Error("Mode " + mode.name + " failed to advance stream.")
  }

  var Token = function(stream, type, state) {
    this.start = stream.start; this.end = stream.pos;
    this.string = stream.current();
    this.type = type || null;
    this.state = state;
  };

  // Utility for getTokenAt and getLineTokens
  function takeToken(cm, pos, precise, asArray) {
    var doc = cm.doc, mode = doc.mode, style;
    pos = clipPos(doc, pos);
    var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise);
    var stream = new StringStream(line.text, cm.options.tabSize, context), tokens;
    if (asArray) { tokens = []; }
    while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
      stream.start = stream.pos;
      style = readToken(mode, stream, context.state);
      if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))); }
    }
    return asArray ? tokens : new Token(stream, style, context.state)
  }

  function extractLineClasses(type, output) {
    if (type) { for (;;) {
      var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
      if (!lineClass) { break }
      type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
      var prop = lineClass[1] ? "bgClass" : "textClass";
      if (output[prop] == null)
        { output[prop] = lineClass[2]; }
      else if (!(new RegExp("(?:^|\\s)" + lineClass[2] + "(?:$|\\s)")).test(output[prop]))
        { output[prop] += " " + lineClass[2]; }
    } }
    return type
  }

  // Run the given mode's parser over a line, calling f for each token.
  function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
    var flattenSpans = mode.flattenSpans;
    if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans; }
    var curStart = 0, curStyle = null;
    var stream = new StringStream(text, cm.options.tabSize, context), style;
    var inner = cm.options.addModeClass && [null];
    if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses); }
    while (!stream.eol()) {
      if (stream.pos > cm.options.maxHighlightLength) {
        flattenSpans = false;
        if (forceToEnd) { processLine(cm, text, context, stream.pos); }
        stream.pos = text.length;
        style = null;
      } else {
        style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses);
      }
      if (inner) {
        var mName = inner[0].name;
        if (mName) { style = "m-" + (style ? mName + " " + style : mName); }
      }
      if (!flattenSpans || curStyle != style) {
        while (curStart < stream.start) {
          curStart = Math.min(stream.start, curStart + 5000);
          f(curStart, curStyle);
        }
        curStyle = style;
      }
      stream.start = stream.pos;
    }
    while (curStart < stream.pos) {
      // Webkit seems to refuse to render text nodes longer than 57444
      // characters, and returns inaccurate measurements in nodes
      // starting around 5000 chars.
      var pos = Math.min(stream.pos, curStart + 5000);
      f(pos, curStyle);
      curStart = pos;
    }
  }

  // Finds the line to start with when starting a parse. Tries to
  // find a line with a stateAfter, so that it can start with a
  // valid state. If that fails, it returns the line with the
  // smallest indentation, which tends to need the least context to
  // parse correctly.
  function findStartLine(cm, n, precise) {
    var minindent, minline, doc = cm.doc;
    var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
    for (var search = n; search > lim; --search) {
      if (search <= doc.first) { return doc.first }
      var line = getLine(doc, search - 1), after = line.stateAfter;
      if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
        { return search }
      var indented = countColumn(line.text, null, cm.options.tabSize);
      if (minline == null || minindent > indented) {
        minline = search - 1;
        minindent = indented;
      }
    }
    return minline
  }

  function retreatFrontier(doc, n) {
    doc.modeFrontier = Math.min(doc.modeFrontier, n);
    if (doc.highlightFrontier < n - 10) { return }
    var start = doc.first;
    for (var line = n - 1; line > start; line--) {
      var saved = getLine(doc, line).stateAfter;
      // change is on 3
      // state on line 1 looked ahead 2 -- so saw 3
      // test 1 + 2 < 3 should cover this
      if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
        start = line + 1;
        break
      }
    }
    doc.highlightFrontier = Math.min(doc.highlightFrontier, start);
  }

  // Optimize some code when these features are not used.
  var sawReadOnlySpans = false, sawCollapsedSpans = false;

  function seeReadOnlySpans() {
    sawReadOnlySpans = true;
  }

  function seeCollapsedSpans() {
    sawCollapsedSpans = true;
  }

  // TEXTMARKER SPANS

  function MarkedSpan(marker, from, to) {
    this.marker = marker;
    this.from = from; this.to = to;
  }

  // Search an array of spans for a span matching the given marker.
  function getMarkedSpanFor(spans, marker) {
    if (spans) { for (var i = 0; i < spans.length; ++i) {
      var span = spans[i];
      if (span.marker == marker) { return span }
    } }
  }

  // Remove a span from an array, returning undefined if no spans are
  // left (we don't store arrays for lines without spans).
  function removeMarkedSpan(spans, span) {
    var r;
    for (var i = 0; i < spans.length; ++i)
      { if (spans[i] != span) { (r || (r = [])).push(spans[i]); } }
    return r
  }

  // Add a span to a line.
  function addMarkedSpan(line, span, op) {
    var inThisOp = op && window.WeakSet && (op.markedSpans || (op.markedSpans = new WeakSet));
    if (inThisOp && line.markedSpans && inThisOp.has(line.markedSpans)) {
      line.markedSpans.push(span);
    } else {
      line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
      if (inThisOp) { inThisOp.add(line.markedSpans); }
    }
    span.marker.attachLine(line);
  }

  // Used for the algorithm that adjusts markers for a change in the
  // document. These functions cut an array of spans at a given
  // character position, returning an array of remaining chunks (or
  // undefined if nothing remains).
  function markedSpansBefore(old, startCh, isInsert) {
    var nw;
    if (old) { for (var i = 0; i < old.length; ++i) {
      var span = old[i], marker = span.marker;
      var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
      if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
        var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh)
        ;(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
      }
    } }
    return nw
  }
  function markedSpansAfter(old, endCh, isInsert) {
    var nw;
    if (old) { for (var i = 0; i < old.length; ++i) {
      var span = old[i], marker = span.marker;
      var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
      if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
        var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh)
        ;(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
                                              span.to == null ? null : span.to - endCh));
      }
    } }
    return nw
  }

  // Given a change object, compute the new set of marker spans that
  // cover the line in which the change took place. Removes spans
  // entirely within the change, reconnects spans belonging to the
  // same marker that appear on both sides of the change, and cuts off
  // spans partially within the change. Returns an array of span
  // arrays with one element for each line in (after) the change.
  function stretchSpansOverChange(doc, change) {
    if (change.full) { return null }
    var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
    var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
    if (!oldFirst && !oldLast) { return null }

    var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
    // Get the spans that 'stick out' on both sides
    var first = markedSpansBefore(oldFirst, startCh, isInsert);
    var last = markedSpansAfter(oldLast, endCh, isInsert);

    // Next, merge those two ends
    var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
    if (first) {
      // Fix up .to properties of first
      for (var i = 0; i < first.length; ++i) {
        var span = first[i];
        if (span.to == null) {
          var found = getMarkedSpanFor(last, span.marker);
          if (!found) { span.to = startCh; }
          else if (sameLine) { span.to = found.to == null ? null : found.to + offset; }
        }
      }
    }
    if (last) {
      // Fix up .from in last (or move them into first in case of sameLine)
      for (var i$1 = 0; i$1 < last.length; ++i$1) {
        var span$1 = last[i$1];
        if (span$1.to != null) { span$1.to += offset; }
        if (span$1.from == null) {
          var found$1 = getMarkedSpanFor(first, span$1.marker);
          if (!found$1) {
            span$1.from = offset;
            if (sameLine) { (first || (first = [])).push(span$1); }
          }
        } else {
          span$1.from += offset;
          if (sameLine) { (first || (first = [])).push(span$1); }
        }
      }
    }
    // Make sure we didn't create any zero-length spans
    if (first) { first = clearEmptySpans(first); }
    if (last && last != first) { last = clearEmptySpans(last); }

    var newMarkers = [first];
    if (!sameLine) {
      // Fill gap with whole-line-spans
      var gap = change.text.length - 2, gapMarkers;
      if (gap > 0 && first)
        { for (var i$2 = 0; i$2 < first.length; ++i$2)
          { if (first[i$2].to == null)
            { (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)); } } }
      for (var i$3 = 0; i$3 < gap; ++i$3)
        { newMarkers.push(gapMarkers); }
      newMarkers.push(last);
    }
    return newMarkers
  }

  // Remove spans that are empty and don't have a clearWhenEmpty
  // option of false.
  function clearEmptySpans(spans) {
    for (var i = 0; i < spans.length; ++i) {
      var span = spans[i];
      if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
        { spans.splice(i--, 1); }
    }
    if (!spans.length) { return null }
    return spans
  }

  // Used to 'clip' out readOnly ranges when making a change.
  function removeReadOnlyRanges(doc, from, to) {
    var markers = null;
    doc.iter(from.line, to.line + 1, function (line) {
      if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
        var mark = line.markedSpans[i].marker;
        if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
          { (markers || (markers = [])).push(mark); }
      } }
    });
    if (!markers) { return null }
    var parts = [{from: from, to: to}];
    for (var i = 0; i < markers.length; ++i) {
      var mk = markers[i], m = mk.find(0);
      for (var j = 0; j < parts.length; ++j) {
        var p = parts[j];
        if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
        var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
        if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
          { newParts.push({from: p.from, to: m.from}); }
        if (dto > 0 || !mk.inclusiveRight && !dto)
          { newParts.push({from: m.to, to: p.to}); }
        parts.splice.apply(parts, newParts);
        j += newParts.length - 3;
      }
    }
    return parts
  }

  // Connect or disconnect spans from a line.
  function detachMarkedSpans(line) {
    var spans = line.markedSpans;
    if (!spans) { return }
    for (var i = 0; i < spans.length; ++i)
      { spans[i].marker.detachLine(line); }
    line.markedSpans = null;
  }
  function attachMarkedSpans(line, spans) {
    if (!spans) { return }
    for (var i = 0; i < spans.length; ++i)
      { spans[i].marker.attachLine(line); }
    line.markedSpans = spans;
  }

  // Helpers used when computing which overlapping collapsed span
  // counts as the larger one.
  function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
  function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }

  // Returns a number indicating which of two overlapping collapsed
  // spans is larger (and thus includes the other). Falls back to
  // comparing ids when the spans cover exactly the same range.
  function compareCollapsedMarkers(a, b) {
    var lenDiff = a.lines.length - b.lines.length;
    if (lenDiff != 0) { return lenDiff }
    var aPos = a.find(), bPos = b.find();
    var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
    if (fromCmp) { return -fromCmp }
    var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
    if (toCmp) { return toCmp }
    return b.id - a.id
  }

  // Find out whether a line ends or starts in a collapsed span. If
  // so, return the marker for that span.
  function collapsedSpanAtSide(line, start) {
    var sps = sawCollapsedSpans && line.markedSpans, found;
    if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
      sp = sps[i];
      if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
          (!found || compareCollapsedMarkers(found, sp.marker) < 0))
        { found = sp.marker; }
    } }
    return found
  }
  function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
  function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }

  function collapsedSpanAround(line, ch) {
    var sps = sawCollapsedSpans && line.markedSpans, found;
    if (sps) { for (var i = 0; i < sps.length; ++i) {
      var sp = sps[i];
      if (sp.marker.collapsed && (sp.from == null || sp.from < ch) && (sp.to == null || sp.to > ch) &&
          (!found || compareCollapsedMarkers(found, sp.marker) < 0)) { found = sp.marker; }
    } }
    return found
  }

  // Test whether there exists a collapsed span that partially
  // overlaps (covers the start or end, but not both) of a new span.
  // Such overlap is not allowed.
  function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
    var line = getLine(doc, lineNo);
    var sps = sawCollapsedSpans && line.markedSpans;
    if (sps) { for (var i = 0; i < sps.length; ++i) {
      var sp = sps[i];
      if (!sp.marker.collapsed) { continue }
      var found = sp.marker.find(0);
      var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
      var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
      if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
      if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
          fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
        { return true }
    } }
  }

  // A visual line is a line as drawn on the screen. Folding, for
  // example, can cause multiple logical lines to appear on the same
  // visual line. This finds the start of the visual line that the
  // given line is part of (usually that is the line itself).
  function visualLine(line) {
    var merged;
    while (merged = collapsedSpanAtStart(line))
      { line = merged.find(-1, true).line; }
    return line
  }

  function visualLineEnd(line) {
    var merged;
    while (merged = collapsedSpanAtEnd(line))
      { line = merged.find(1, true).line; }
    return line
  }

  // Returns an array of logical lines that continue the visual line
  // started by the argument, or undefined if there are no such lines.
  function visualLineContinued(line) {
    var merged, lines;
    while (merged = collapsedSpanAtEnd(line)) {
      line = merged.find(1, true).line
      ;(lines || (lines = [])).push(line);
    }
    return lines
  }

  // Get the line number of the start of the visual line that the
  // given line number is part of.
  function visualLineNo(doc, lineN) {
    var line = getLine(doc, lineN), vis = visualLine(line);
    if (line == vis) { return lineN }
    return lineNo(vis)
  }

  // Get the line number of the start of the next visual line after
  // the given line.
  function visualLineEndNo(doc, lineN) {
    if (lineN > doc.lastLine()) { return lineN }
    var line = getLine(doc, lineN), merged;
    if (!lineIsHidden(doc, line)) { return lineN }
    while (merged = collapsedSpanAtEnd(line))
      { line = merged.find(1, true).line; }
    return lineNo(line) + 1
  }

  // Compute whether a line is hidden. Lines count as hidden when they
  // are part of a visual line that starts with another line, or when
  // they are entirely covered by collapsed, non-widget span.
  function lineIsHidden(doc, line) {
    var sps = sawCollapsedSpans && line.markedSpans;
    if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
      sp = sps[i];
      if (!sp.marker.collapsed) { continue }
      if (sp.from == null) { return true }
      if (sp.marker.widgetNode) { continue }
      if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
        { return true }
    } }
  }
  function lineIsHiddenInner(doc, line, span) {
    if (span.to == null) {
      var end = span.marker.find(1, true);
      return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
    }
    if (span.marker.inclusiveRight && span.to == line.text.length)
      { return true }
    for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
      sp = line.markedSpans[i];
      if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
          (sp.to == null || sp.to != span.from) &&
          (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
          lineIsHiddenInner(doc, line, sp)) { return true }
    }
  }

  // Find the height above the given line.
  function heightAtLine(lineObj) {
    lineObj = visualLine(lineObj);

    var h = 0, chunk = lineObj.parent;
    for (var i = 0; i < chunk.lines.length; ++i) {
      var line = chunk.lines[i];
      if (line == lineObj) { break }
      else { h += line.height; }
    }
    for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
      for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
        var cur = p.children[i$1];
        if (cur == chunk) { break }
        else { h += cur.height; }
      }
    }
    return h
  }

  // Compute the character length of a line, taking into account
  // collapsed ranges (see markText) that might hide parts, and join
  // other lines onto it.
  function lineLength(line) {
    if (line.height == 0) { return 0 }
    var len = line.text.length, merged, cur = line;
    while (merged = collapsedSpanAtStart(cur)) {
      var found = merged.find(0, true);
      cur = found.from.line;
      len += found.from.ch - found.to.ch;
    }
    cur = line;
    while (merged = collapsedSpanAtEnd(cur)) {
      var found$1 = merged.find(0, true);
      len -= cur.text.length - found$1.from.ch;
      cur = found$1.to.line;
      len += cur.text.length - found$1.to.ch;
    }
    return len
  }

  // Find the longest line in the document.
  function findMaxLine(cm) {
    var d = cm.display, doc = cm.doc;
    d.maxLine = getLine(doc, doc.first);
    d.maxLineLength = lineLength(d.maxLine);
    d.maxLineChanged = true;
    doc.iter(function (line) {
      var len = lineLength(line);
      if (len > d.maxLineLength) {
        d.maxLineLength = len;
        d.maxLine = line;
      }
    });
  }

  // LINE DATA STRUCTURE

  // Line objects. These hold state related to a line, including
  // highlighting info (the styles array).
  var Line = function(text, markedSpans, estimateHeight) {
    this.text = text;
    attachMarkedSpans(this, markedSpans);
    this.height = estimateHeight ? estimateHeight(this) : 1;
  };

  Line.prototype.lineNo = function () { return lineNo(this) };
  eventMixin(Line);

  // Change the content (text, markers) of a line. Automatically
  // invalidates cached information and tries to re-estimate the
  // line's height.
  function updateLine(line, text, markedSpans, estimateHeight) {
    line.text = text;
    if (line.stateAfter) { line.stateAfter = null; }
    if (line.styles) { line.styles = null; }
    if (line.order != null) { line.order = null; }
    detachMarkedSpans(line);
    attachMarkedSpans(line, markedSpans);
    var estHeight = estimateHeight ? estimateHeight(line) : 1;
    if (estHeight != line.height) { updateLineHeight(line, estHeight); }
  }

  // Detach a line from the document tree and its markers.
  function cleanUpLine(line) {
    line.parent = null;
    detachMarkedSpans(line);
  }

  // Convert a style as returned by a mode (either null, or a string
  // containing one or more styles) to a CSS style. This is cached,
  // and also looks for line-wide styles.
  var styleToClassCache = {}, styleToClassCacheWithMode = {};
  function interpretTokenStyle(style, options) {
    if (!style || /^\s*$/.test(style)) { return null }
    var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
    return cache[style] ||
      (cache[style] = style.replace(/\S+/g, "cm-$&"))
  }

  // Render the DOM representation of the text of a line. Also builds
  // up a 'line map', which points at the DOM nodes that represent
  // specific stretches of text, and is used by the measuring code.
  // The returned object contains the DOM node, this map, and
  // information about line-wide styles that were set by the mode.
  function buildLineContent(cm, lineView) {
    // The padding-right forces the element to have a 'border', which
    // is needed on Webkit to be able to get line-level bounding
    // rectangles for it (in measureChar).
    var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null);
    var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
                   col: 0, pos: 0, cm: cm,
                   trailingSpace: false,
                   splitSpaces: cm.getOption("lineWrapping")};
    lineView.measure = {};

    // Iterate over the logical lines that make up this visual line.
    for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
      var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0);
      builder.pos = 0;
      builder.addToken = buildToken;
      // Optionally wire in some hacks into the token-rendering
      // algorithm, to deal with browser quirks.
      if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
        { builder.addToken = buildTokenBadBidi(builder.addToken, order); }
      builder.map = [];
      var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
      insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
      if (line.styleClasses) {
        if (line.styleClasses.bgClass)
          { builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || ""); }
        if (line.styleClasses.textClass)
          { builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || ""); }
      }

      // Ensure at least a single node is present, for measuring.
      if (builder.map.length == 0)
        { builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))); }

      // Store the map and a cache object for the current logical line
      if (i == 0) {
        lineView.measure.map = builder.map;
        lineView.measure.cache = {};
      } else {
  (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
        ;(lineView.measure.caches || (lineView.measure.caches = [])).push({});
      }
    }

    // See issue #2901
    if (webkit) {
      var last = builder.content.lastChild;
      if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
        { builder.content.className = "cm-tab-wrap-hack"; }
    }

    signal(cm, "renderLine", cm, lineView.line, builder.pre);
    if (builder.pre.className)
      { builder.textClass = joinClasses(builder.pre.className, builder.textClass || ""); }

    return builder
  }

  function defaultSpecialCharPlaceholder(ch) {
    var token = elt("span", "\u2022", "cm-invalidchar");
    token.title = "\\u" + ch.charCodeAt(0).toString(16);
    token.setAttribute("aria-label", token.title);
    return token
  }

  // Build up the DOM representation for a single token, and add it to
  // the line map. Takes care to render special characters separately.
  function buildToken(builder, text, style, startStyle, endStyle, css, attributes) {
    if (!text) { return }
    var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text;
    var special = builder.cm.state.specialChars, mustWrap = false;
    var content;
    if (!special.test(text)) {
      builder.col += text.length;
      content = document.createTextNode(displayText);
      builder.map.push(builder.pos, builder.pos + text.length, content);
      if (ie && ie_version < 9) { mustWrap = true; }
      builder.pos += text.length;
    } else {
      content = document.createDocumentFragment();
      var pos = 0;
      while (true) {
        special.lastIndex = pos;
        var m = special.exec(text);
        var skipped = m ? m.index - pos : text.length - pos;
        if (skipped) {
          var txt = document.createTextNode(displayText.slice(pos, pos + skipped));
          if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])); }
          else { content.appendChild(txt); }
          builder.map.push(builder.pos, builder.pos + skipped, txt);
          builder.col += skipped;
          builder.pos += skipped;
        }
        if (!m) { break }
        pos += skipped + 1;
        var txt$1 = (void 0);
        if (m[0] == "\t") {
          var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
          txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
          txt$1.setAttribute("role", "presentation");
          txt$1.setAttribute("cm-text", "\t");
          builder.col += tabWidth;
        } else if (m[0] == "\r" || m[0] == "\n") {
          txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
          txt$1.setAttribute("cm-text", m[0]);
          builder.col += 1;
        } else {
          txt$1 = builder.cm.options.specialCharPlaceholder(m[0]);
          txt$1.setAttribute("cm-text", m[0]);
          if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])); }
          else { content.appendChild(txt$1); }
          builder.col += 1;
        }
        builder.map.push(builder.pos, builder.pos + 1, txt$1);
        builder.pos++;
      }
    }
    builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32;
    if (style || startStyle || endStyle || mustWrap || css || attributes) {
      var fullStyle = style || "";
      if (startStyle) { fullStyle += startStyle; }
      if (endStyle) { fullStyle += endStyle; }
      var token = elt("span", [content], fullStyle, css);
      if (attributes) {
        for (var attr in attributes) { if (attributes.hasOwnProperty(attr) && attr != "style" && attr != "class")
          { token.setAttribute(attr, attributes[attr]); } }
      }
      return builder.content.appendChild(token)
    }
    builder.content.appendChild(content);
  }

  // Change some spaces to NBSP to prevent the browser from collapsing
  // trailing spaces at the end of a line when rendering text (issue #1362).
  function splitSpaces(text, trailingBefore) {
    if (text.length > 1 && !/  /.test(text)) { return text }
    var spaceBefore = trailingBefore, result = "";
    for (var i = 0; i < text.length; i++) {
      var ch = text.charAt(i);
      if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
        { ch = "\u00a0"; }
      result += ch;
      spaceBefore = ch == " ";
    }
    return result
  }

  // Work around nonsense dimensions being reported for stretches of
  // right-to-left text.
  function buildTokenBadBidi(inner, order) {
    return function (builder, text, style, startStyle, endStyle, css, attributes) {
      style = style ? style + " cm-force-border" : "cm-force-border";
      var start = builder.pos, end = start + text.length;
      for (;;) {
        // Find the part that overlaps with the start of this text
        var part = (void 0);
        for (var i = 0; i < order.length; i++) {
          part = order[i];
          if (part.to > start && part.from <= start) { break }
        }
        if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, css, attributes) }
        inner(builder, text.slice(0, part.to - start), style, startStyle, null, css, attributes);
        startStyle = null;
        text = text.slice(part.to - start);
        start = part.to;
      }
    }
  }

  function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
    var widget = !ignoreWidget && marker.widgetNode;
    if (widget) { builder.map.push(builder.pos, builder.pos + size, widget); }
    if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
      if (!widget)
        { widget = builder.content.appendChild(document.createElement("span")); }
      widget.setAttribute("cm-marker", marker.id);
    }
    if (widget) {
      builder.cm.display.input.setUneditable(widget);
      builder.content.appendChild(widget);
    }
    builder.pos += size;
    builder.trailingSpace = false;
  }

  // Outputs a number of spans to make up a line, taking highlighting
  // and marked text into account.
  function insertLineContent(line, builder, styles) {
    var spans = line.markedSpans, allText = line.text, at = 0;
    if (!spans) {
      for (var i$1 = 1; i$1 < styles.length; i$1+=2)
        { builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)); }
      return
    }

    var len = allText.length, pos = 0, i = 1, text = "", style, css;
    var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, collapsed, attributes;
    for (;;) {
      if (nextChange == pos) { // Update current marker set
        spanStyle = spanEndStyle = spanStartStyle = css = "";
        attributes = null;
        collapsed = null; nextChange = Infinity;
        var foundBookmarks = [], endStyles = (void 0);
        for (var j = 0; j < spans.length; ++j) {
          var sp = spans[j], m = sp.marker;
          if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
            foundBookmarks.push(m);
          } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
            if (sp.to != null && sp.to != pos && nextChange > sp.to) {
              nextChange = sp.to;
              spanEndStyle = "";
            }
            if (m.className) { spanStyle += " " + m.className; }
            if (m.css) { css = (css ? css + ";" : "") + m.css; }
            if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle; }
            if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to); }
            // support for the old title property
            // https://github.com/codemirror/CodeMirror/pull/5673
            if (m.title) { (attributes || (attributes = {})).title = m.title; }
            if (m.attributes) {
              for (var attr in m.attributes)
                { (attributes || (attributes = {}))[attr] = m.attributes[attr]; }
            }
            if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
              { collapsed = sp; }
          } else if (sp.from > pos && nextChange > sp.from) {
            nextChange = sp.from;
          }
        }
        if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
          { if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1]; } } }

        if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
          { buildCollapsedSpan(builder, 0, foundBookmarks[j$2]); } }
        if (collapsed && (collapsed.from || 0) == pos) {
          buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
                             collapsed.marker, collapsed.from == null);
          if (collapsed.to == null) { return }
          if (collapsed.to == pos) { collapsed = false; }
        }
      }
      if (pos >= len) { break }

      var upto = Math.min(len, nextChange);
      while (true) {
        if (text) {
          var end = pos + text.length;
          if (!collapsed) {
            var tokenText = end > upto ? text.slice(0, upto - pos) : text;
            builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
                             spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", css, attributes);
          }
          if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
          pos = end;
          spanStartStyle = "";
        }
        text = allText.slice(at, at = styles[i++]);
        style = interpretTokenStyle(styles[i++], builder.cm.options);
      }
    }
  }


  // These objects are used to represent the visible (currently drawn)
  // part of the document. A LineView may correspond to multiple
  // logical lines, if those are connected by collapsed ranges.
  function LineView(doc, line, lineN) {
    // The starting line
    this.line = line;
    // Continuing lines, if any
    this.rest = visualLineContinued(line);
    // Number of logical lines in this visual line
    this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
    this.node = this.text = null;
    this.hidden = lineIsHidden(doc, line);
  }

  // Create a range of LineView objects for the given lines.
  function buildViewArray(cm, from, to) {
    var array = [], nextPos;
    for (var pos = from; pos < to; pos = nextPos) {
      var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
      nextPos = pos + view.size;
      array.push(view);
    }
    return array
  }

  var operationGroup = null;

  function pushOperation(op) {
    if (operationGroup) {
      operationGroup.ops.push(op);
    } else {
      op.ownsGroup = operationGroup = {
        ops: [op],
        delayedCallbacks: []
      };
    }
  }

  function fireCallbacksForOps(group) {
    // Calls delayed callbacks and cursorActivity handlers until no
    // new ones appear
    var callbacks = group.delayedCallbacks, i = 0;
    do {
      for (; i < callbacks.length; i++)
        { callbacks[i].call(null); }
      for (var j = 0; j < group.ops.length; j++) {
        var op = group.ops[j];
        if (op.cursorActivityHandlers)
          { while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
            { op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm); } }
      }
    } while (i < callbacks.length)
  }

  function finishOperation(op, endCb) {
    var group = op.ownsGroup;
    if (!group) { return }

    try { fireCallbacksForOps(group); }
    finally {
      operationGroup = null;
      endCb(group);
    }
  }

  var orphanDelayedCallbacks = null;

  // Often, we want to signal events at a point where we are in the
  // middle of some work, but don't want the handler to start calling
  // other methods on the editor, which might be in an inconsistent
  // state or simply not expect any other events to happen.
  // signalLater looks whether there are any handlers, and schedules
  // them to be executed when the last operation ends, or, if no
  // operation is active, when a timeout fires.
  function signalLater(emitter, type /*, values...*/) {
    var arr = getHandlers(emitter, type);
    if (!arr.length) { return }
    var args = Array.prototype.slice.call(arguments, 2), list;
    if (operationGroup) {
      list = operationGroup.delayedCallbacks;
    } else if (orphanDelayedCallbacks) {
      list = orphanDelayedCallbacks;
    } else {
      list = orphanDelayedCallbacks = [];
      setTimeout(fireOrphanDelayed, 0);
    }
    var loop = function ( i ) {
      list.push(function () { return arr[i].apply(null, args); });
    };

    for (var i = 0; i < arr.length; ++i)
      loop( i );
  }

  function fireOrphanDelayed() {
    var delayed = orphanDelayedCallbacks;
    orphanDelayedCallbacks = null;
    for (var i = 0; i < delayed.length; ++i) { delayed[i](); }
  }

  // When an aspect of a line changes, a string is added to
  // lineView.changes. This updates the relevant part of the line's
  // DOM structure.
  function updateLineForChanges(cm, lineView, lineN, dims) {
    for (var j = 0; j < lineView.changes.length; j++) {
      var type = lineView.changes[j];
      if (type == "text") { updateLineText(cm, lineView); }
      else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims); }
      else if (type == "class") { updateLineClasses(cm, lineView); }
      else if (type == "widget") { updateLineWidgets(cm, lineView, dims); }
    }
    lineView.changes = null;
  }

  // Lines with gutter elements, widgets or a background class need to
  // be wrapped, and have the extra elements added to the wrapper div
  function ensureLineWrapped(lineView) {
    if (lineView.node == lineView.text) {
      lineView.node = elt("div", null, null, "position: relative");
      if (lineView.text.parentNode)
        { lineView.text.parentNode.replaceChild(lineView.node, lineView.text); }
      lineView.node.appendChild(lineView.text);
      if (ie && ie_version < 8) { lineView.node.style.zIndex = 2; }
    }
    return lineView.node
  }

  function updateLineBackground(cm, lineView) {
    var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
    if (cls) { cls += " CodeMirror-linebackground"; }
    if (lineView.background) {
      if (cls) { lineView.background.className = cls; }
      else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
    } else if (cls) {
      var wrap = ensureLineWrapped(lineView);
      lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
      cm.display.input.setUneditable(lineView.background);
    }
  }

  // Wrapper around buildLineContent which will reuse the structure
  // in display.externalMeasured when possible.
  function getLineContent(cm, lineView) {
    var ext = cm.display.externalMeasured;
    if (ext && ext.line == lineView.line) {
      cm.display.externalMeasured = null;
      lineView.measure = ext.measure;
      return ext.built
    }
    return buildLineContent(cm, lineView)
  }

  // Redraw the line's text. Interacts with the background and text
  // classes because the mode may output tokens that influence these
  // classes.
  function updateLineText(cm, lineView) {
    var cls = lineView.text.className;
    var built = getLineContent(cm, lineView);
    if (lineView.text == lineView.node) { lineView.node = built.pre; }
    lineView.text.parentNode.replaceChild(built.pre, lineView.text);
    lineView.text = built.pre;
    if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
      lineView.bgClass = built.bgClass;
      lineView.textClass = built.textClass;
      updateLineClasses(cm, lineView);
    } else if (cls) {
      lineView.text.className = cls;
    }
  }

  function updateLineClasses(cm, lineView) {
    updateLineBackground(cm, lineView);
    if (lineView.line.wrapClass)
      { ensureLineWrapped(lineView).className = lineView.line.wrapClass; }
    else if (lineView.node != lineView.text)
      { lineView.node.className = ""; }
    var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
    lineView.text.className = textClass || "";
  }

  function updateLineGutter(cm, lineView, lineN, dims) {
    if (lineView.gutter) {
      lineView.node.removeChild(lineView.gutter);
      lineView.gutter = null;
    }
    if (lineView.gutterBackground) {
      lineView.node.removeChild(lineView.gutterBackground);
      lineView.gutterBackground = null;
    }
    if (lineView.line.gutterClass) {
      var wrap = ensureLineWrapped(lineView);
      lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
                                      ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"));
      cm.display.input.setUneditable(lineView.gutterBackground);
      wrap.insertBefore(lineView.gutterBackground, lineView.text);
    }
    var markers = lineView.line.gutterMarkers;
    if (cm.options.lineNumbers || markers) {
      var wrap$1 = ensureLineWrapped(lineView);
      var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"));
      gutterWrap.setAttribute("aria-hidden", "true");
      cm.display.input.setUneditable(gutterWrap);
      wrap$1.insertBefore(gutterWrap, lineView.text);
      if (lineView.line.gutterClass)
        { gutterWrap.className += " " + lineView.line.gutterClass; }
      if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
        { lineView.lineNumber = gutterWrap.appendChild(
          elt("div", lineNumberFor(cm.options, lineN),
              "CodeMirror-linenumber CodeMirror-gutter-elt",
              ("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))); }
      if (markers) { for (var k = 0; k < cm.display.gutterSpecs.length; ++k) {
        var id = cm.display.gutterSpecs[k].className, found = markers.hasOwnProperty(id) && markers[id];
        if (found)
          { gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
                                     ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))); }
      } }
    }
  }

  function updateLineWidgets(cm, lineView, dims) {
    if (lineView.alignable) { lineView.alignable = null; }
    var isWidget = classTest("CodeMirror-linewidget");
    for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
      next = node.nextSibling;
      if (isWidget.test(node.className)) { lineView.node.removeChild(node); }
    }
    insertLineWidgets(cm, lineView, dims);
  }

  // Build a line's DOM representation from scratch
  function buildLineElement(cm, lineView, lineN, dims) {
    var built = getLineContent(cm, lineView);
    lineView.text = lineView.node = built.pre;
    if (built.bgClass) { lineView.bgClass = built.bgClass; }
    if (built.textClass) { lineView.textClass = built.textClass; }

    updateLineClasses(cm, lineView);
    updateLineGutter(cm, lineView, lineN, dims);
    insertLineWidgets(cm, lineView, dims);
    return lineView.node
  }

  // A lineView may contain multiple logical lines (when merged by
  // collapsed spans). The widgets for all of them need to be drawn.
  function insertLineWidgets(cm, lineView, dims) {
    insertLineWidgetsFor(cm, lineView.line, lineView, dims, true);
    if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
      { insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false); } }
  }

  function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
    if (!line.widgets) { return }
    var wrap = ensureLineWrapped(lineView);
    for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
      var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget" + (widget.className ? " " + widget.className : ""));
      if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true"); }
      positionLineWidget(widget, node, lineView, dims);
      cm.display.input.setUneditable(node);
      if (allowAbove && widget.above)
        { wrap.insertBefore(node, lineView.gutter || lineView.text); }
      else
        { wrap.appendChild(node); }
      signalLater(widget, "redraw");
    }
  }

  function positionLineWidget(widget, node, lineView, dims) {
    if (widget.noHScroll) {
  (lineView.alignable || (lineView.alignable = [])).push(node);
      var width = dims.wrapperWidth;
      node.style.left = dims.fixedPos + "px";
      if (!widget.coverGutter) {
        width -= dims.gutterTotalWidth;
        node.style.paddingLeft = dims.gutterTotalWidth + "px";
      }
      node.style.width = width + "px";
    }
    if (widget.coverGutter) {
      node.style.zIndex = 5;
      node.style.position = "relative";
      if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px"; }
    }
  }

  function widgetHeight(widget) {
    if (widget.height != null) { return widget.height }
    var cm = widget.doc.cm;
    if (!cm) { return 0 }
    if (!contains(document.body, widget.node)) {
      var parentStyle = "position: relative;";
      if (widget.coverGutter)
        { parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;"; }
      if (widget.noHScroll)
        { parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;"; }
      removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
    }
    return widget.height = widget.node.parentNode.offsetHeight
  }

  // Return true when the given mouse event happened in a widget
  function eventInWidget(display, e) {
    for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
      if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
          (n.parentNode == display.sizer && n != display.mover))
        { return true }
    }
  }

  // POSITION MEASUREMENT

  function paddingTop(display) {return display.lineSpace.offsetTop}
  function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
  function paddingH(display) {
    if (display.cachedPaddingH) { return display.cachedPaddingH }
    var e = removeChildrenAndAdd(display.measure, elt("pre", "x", "CodeMirror-line-like"));
    var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
    var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
    if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data; }
    return data
  }

  function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
  function displayWidth(cm) {
    return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
  }
  function displayHeight(cm) {
    return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
  }

  // Ensure the lineView.wrapping.heights array is populated. This is
  // an array of bottom offsets for the lines that make up a drawn
  // line. When lineWrapping is on, there might be more than one
  // height.
  function ensureLineHeights(cm, lineView, rect) {
    var wrapping = cm.options.lineWrapping;
    var curWidth = wrapping && displayWidth(cm);
    if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
      var heights = lineView.measure.heights = [];
      if (wrapping) {
        lineView.measure.width = curWidth;
        var rects = lineView.text.firstChild.getClientRects();
        for (var i = 0; i < rects.length - 1; i++) {
          var cur = rects[i], next = rects[i + 1];
          if (Math.abs(cur.bottom - next.bottom) > 2)
            { heights.push((cur.bottom + next.top) / 2 - rect.top); }
        }
      }
      heights.push(rect.bottom - rect.top);
    }
  }

  // Find a line map (mapping character offsets to text nodes) and a
  // measurement cache for the given line number. (A line view might
  // contain multiple lines when collapsed ranges are present.)
  function mapFromLineView(lineView, line, lineN) {
    if (lineView.line == line)
      { return {map: lineView.measure.map, cache: lineView.measure.cache} }
    if (lineView.rest) {
      for (var i = 0; i < lineView.rest.length; i++)
        { if (lineView.rest[i] == line)
          { return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
      for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
        { if (lineNo(lineView.rest[i$1]) > lineN)
          { return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
    }
  }

  // Render a line into the hidden node display.externalMeasured. Used
  // when measurement is needed for a line that's not in the viewport.
  function updateExternalMeasurement(cm, line) {
    line = visualLine(line);
    var lineN = lineNo(line);
    var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
    view.lineN = lineN;
    var built = view.built = buildLineContent(cm, view);
    view.text = built.pre;
    removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
    return view
  }

  // Get a {top, bottom, left, right} box (in line-local coordinates)
  // for a given character.
  function measureChar(cm, line, ch, bias) {
    return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
  }

  // Find a line view that corresponds to the given line number.
  function findViewForLine(cm, lineN) {
    if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
      { return cm.display.view[findViewIndex(cm, lineN)] }
    var ext = cm.display.externalMeasured;
    if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
      { return ext }
  }

  // Measurement can be split in two steps, the set-up work that
  // applies to the whole line, and the measurement of the actual
  // character. Functions like coordsChar, that need to do a lot of
  // measurements in a row, can thus ensure that the set-up work is
  // only done once.
  function prepareMeasureForLine(cm, line) {
    var lineN = lineNo(line);
    var view = findViewForLine(cm, lineN);
    if (view && !view.text) {
      view = null;
    } else if (view && view.changes) {
      updateLineForChanges(cm, view, lineN, getDimensions(cm));
      cm.curOp.forceUpdate = true;
    }
    if (!view)
      { view = updateExternalMeasurement(cm, line); }

    var info = mapFromLineView(view, line, lineN);
    return {
      line: line, view: view, rect: null,
      map: info.map, cache: info.cache, before: info.before,
      hasHeights: false
    }
  }

  // Given a prepared measurement object, measures the position of an
  // actual character (or fetches it from the cache).
  function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
    if (prepared.before) { ch = -1; }
    var key = ch + (bias || ""), found;
    if (prepared.cache.hasOwnProperty(key)) {
      found = prepared.cache[key];
    } else {
      if (!prepared.rect)
        { prepared.rect = prepared.view.text.getBoundingClientRect(); }
      if (!prepared.hasHeights) {
        ensureLineHeights(cm, prepared.view, prepared.rect);
        prepared.hasHeights = true;
      }
      found = measureCharInner(cm, prepared, ch, bias);
      if (!found.bogus) { prepared.cache[key] = found; }
    }
    return {left: found.left, right: found.right,
            top: varHeight ? found.rtop : found.top,
            bottom: varHeight ? found.rbottom : found.bottom}
  }

  var nullRect = {left: 0, right: 0, top: 0, bottom: 0};

  function nodeAndOffsetInLineMap(map, ch, bias) {
    var node, start, end, collapse, mStart, mEnd;
    // First, search the line map for the text node corresponding to,
    // or closest to, the target character.
    for (var i = 0; i < map.length; i += 3) {
      mStart = map[i];
      mEnd = map[i + 1];
      if (ch < mStart) {
        start = 0; end = 1;
        collapse = "left";
      } else if (ch < mEnd) {
        start = ch - mStart;
        end = start + 1;
      } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
        end = mEnd - mStart;
        start = end - 1;
        if (ch >= mEnd) { collapse = "right"; }
      }
      if (start != null) {
        node = map[i + 2];
        if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
          { collapse = bias; }
        if (bias == "left" && start == 0)
          { while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
            node = map[(i -= 3) + 2];
            collapse = "left";
          } }
        if (bias == "right" && start == mEnd - mStart)
          { while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
            node = map[(i += 3) + 2];
            collapse = "right";
          } }
        break
      }
    }
    return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
  }

  function getUsefulRect(rects, bias) {
    var rect = nullRect;
    if (bias == "left") { for (var i = 0; i < rects.length; i++) {
      if ((rect = rects[i]).left != rect.right) { break }
    } } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
      if ((rect = rects[i$1]).left != rect.right) { break }
    } }
    return rect
  }

  function measureCharInner(cm, prepared, ch, bias) {
    var place = nodeAndOffsetInLineMap(prepared.map, ch, bias);
    var node = place.node, start = place.start, end = place.end, collapse = place.collapse;

    var rect;
    if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
      for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
        while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start; }
        while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end; }
        if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
          { rect = node.parentNode.getBoundingClientRect(); }
        else
          { rect = getUsefulRect(range(node, start, end).getClientRects(), bias); }
        if (rect.left || rect.right || start == 0) { break }
        end = start;
        start = start - 1;
        collapse = "right";
      }
      if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect); }
    } else { // If it is a widget, simply get the box for the whole widget.
      if (start > 0) { collapse = bias = "right"; }
      var rects;
      if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
        { rect = rects[bias == "right" ? rects.length - 1 : 0]; }
      else
        { rect = node.getBoundingClientRect(); }
    }
    if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
      var rSpan = node.parentNode.getClientRects()[0];
      if (rSpan)
        { rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom}; }
      else
        { rect = nullRect; }
    }

    var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
    var mid = (rtop + rbot) / 2;
    var heights = prepared.view.measure.heights;
    var i = 0;
    for (; i < heights.length - 1; i++)
      { if (mid < heights[i]) { break } }
    var top = i ? heights[i - 1] : 0, bot = heights[i];
    var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
                  right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
                  top: top, bottom: bot};
    if (!rect.left && !rect.right) { result.bogus = true; }
    if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }

    return result
  }

  // Work around problem with bounding client rects on ranges being
  // returned incorrectly when zoomed on IE10 and below.
  function maybeUpdateRectForZooming(measure, rect) {
    if (!window.screen || screen.logicalXDPI == null ||
        screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
      { return rect }
    var scaleX = screen.logicalXDPI / screen.deviceXDPI;
    var scaleY = screen.logicalYDPI / screen.deviceYDPI;
    return {left: rect.left * scaleX, right: rect.right * scaleX,
            top: rect.top * scaleY, bottom: rect.bottom * scaleY}
  }

  function clearLineMeasurementCacheFor(lineView) {
    if (lineView.measure) {
      lineView.measure.cache = {};
      lineView.measure.heights = null;
      if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
        { lineView.measure.caches[i] = {}; } }
    }
  }

  function clearLineMeasurementCache(cm) {
    cm.display.externalMeasure = null;
    removeChildren(cm.display.lineMeasure);
    for (var i = 0; i < cm.display.view.length; i++)
      { clearLineMeasurementCacheFor(cm.display.view[i]); }
  }

  function clearCaches(cm) {
    clearLineMeasurementCache(cm);
    cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
    if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true; }
    cm.display.lineNumChars = null;
  }

  function pageScrollX(doc) {
    // Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
    // which causes page_Offset and bounding client rects to use
    // different reference viewports and invalidate our calculations.
    if (chrome && android) { return -(doc.body.getBoundingClientRect().left - parseInt(getComputedStyle(doc.body).marginLeft)) }
    return doc.defaultView.pageXOffset || (doc.documentElement || doc.body).scrollLeft
  }
  function pageScrollY(doc) {
    if (chrome && android) { return -(doc.body.getBoundingClientRect().top - parseInt(getComputedStyle(doc.body).marginTop)) }
    return doc.defaultView.pageYOffset || (doc.documentElement || doc.body).scrollTop
  }

  function widgetTopHeight(lineObj) {
    var ref = visualLine(lineObj);
    var widgets = ref.widgets;
    var height = 0;
    if (widgets) { for (var i = 0; i < widgets.length; ++i) { if (widgets[i].above)
      { height += widgetHeight(widgets[i]); } } }
    return height
  }

  // Converts a {top, bottom, left, right} box from line-local
  // coordinates into another coordinate system. Context may be one of
  // "line", "div" (display.lineDiv), "local"./null (editor), "window",
  // or "page".
  function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
    if (!includeWidgets) {
      var height = widgetTopHeight(lineObj);
      rect.top += height; rect.bottom += height;
    }
    if (context == "line") { return rect }
    if (!context) { context = "local"; }
    var yOff = heightAtLine(lineObj);
    if (context == "local") { yOff += paddingTop(cm.display); }
    else { yOff -= cm.display.viewOffset; }
    if (context == "page" || context == "window") {
      var lOff = cm.display.lineSpace.getBoundingClientRect();
      yOff += lOff.top + (context == "window" ? 0 : pageScrollY(doc(cm)));
      var xOff = lOff.left + (context == "window" ? 0 : pageScrollX(doc(cm)));
      rect.left += xOff; rect.right += xOff;
    }
    rect.top += yOff; rect.bottom += yOff;
    return rect
  }

  // Coverts a box from "div" coords to another coordinate system.
  // Context may be "window", "page", "div", or "local"./null.
  function fromCoordSystem(cm, coords, context) {
    if (context == "div") { return coords }
    var left = coords.left, top = coords.top;
    // First move into "page" coordinate system
    if (context == "page") {
      left -= pageScrollX(doc(cm));
      top -= pageScrollY(doc(cm));
    } else if (context == "local" || !context) {
      var localBox = cm.display.sizer.getBoundingClientRect();
      left += localBox.left;
      top += localBox.top;
    }

    var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
    return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
  }

  function charCoords(cm, pos, context, lineObj, bias) {
    if (!lineObj) { lineObj = getLine(cm.doc, pos.line); }
    return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
  }

  // Returns a box for a given cursor position, which may have an
  // 'other' property containing the position of the secondary cursor
  // on a bidi boundary.
  // A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
  // and after `char - 1` in writing order of `char - 1`
  // A cursor Pos(line, char, "after") is on the same visual line as `char`
  // and before `char` in writing order of `char`
  // Examples (upper-case letters are RTL, lower-case are LTR):
  //     Pos(0, 1, ...)
  //     before   after
  // ab     a|b     a|b
  // aB     a|B     aB|
  // Ab     |Ab     A|b
  // AB     B|A     B|A
  // Every position after the last character on a line is considered to stick
  // to the last character on the line.
  function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
    lineObj = lineObj || getLine(cm.doc, pos.line);
    if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
    function get(ch, right) {
      var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
      if (right) { m.left = m.right; } else { m.right = m.left; }
      return intoCoordSystem(cm, lineObj, m, context)
    }
    var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky;
    if (ch >= lineObj.text.length) {
      ch = lineObj.text.length;
      sticky = "before";
    } else if (ch <= 0) {
      ch = 0;
      sticky = "after";
    }
    if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }

    function getBidi(ch, partPos, invert) {
      var part = order[partPos], right = part.level == 1;
      return get(invert ? ch - 1 : ch, right != invert)
    }
    var partPos = getBidiPartAt(order, ch, sticky);
    var other = bidiOther;
    var val = getBidi(ch, partPos, sticky == "before");
    if (other != null) { val.other = getBidi(ch, other, sticky != "before"); }
    return val
  }

  // Used to cheaply estimate the coordinates for a position. Used for
  // intermediate scroll updates.
  function estimateCoords(cm, pos) {
    var left = 0;
    pos = clipPos(cm.doc, pos);
    if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch; }
    var lineObj = getLine(cm.doc, pos.line);
    var top = heightAtLine(lineObj) + paddingTop(cm.display);
    return {left: left, right: left, top: top, bottom: top + lineObj.height}
  }

  // Positions returned by coordsChar contain some extra information.
  // xRel is the relative x position of the input coordinates compared
  // to the found position (so xRel > 0 means the coordinates are to
  // the right of the character position, for example). When outside
  // is true, that means the coordinates lie outside the line's
  // vertical range.
  function PosWithInfo(line, ch, sticky, outside, xRel) {
    var pos = Pos(line, ch, sticky);
    pos.xRel = xRel;
    if (outside) { pos.outside = outside; }
    return pos
  }

  // Compute the character position closest to the given coordinates.
  // Input must be lineSpace-local ("div" coordinate system).
  function coordsChar(cm, x, y) {
    var doc = cm.doc;
    y += cm.display.viewOffset;
    if (y < 0) { return PosWithInfo(doc.first, 0, null, -1, -1) }
    var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
    if (lineN > last)
      { return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, 1, 1) }
    if (x < 0) { x = 0; }

    var lineObj = getLine(doc, lineN);
    for (;;) {
      var found = coordsCharInner(cm, lineObj, lineN, x, y);
      var collapsed = collapsedSpanAround(lineObj, found.ch + (found.xRel > 0 || found.outside > 0 ? 1 : 0));
      if (!collapsed) { return found }
      var rangeEnd = collapsed.find(1);
      if (rangeEnd.line == lineN) { return rangeEnd }
      lineObj = getLine(doc, lineN = rangeEnd.line);
    }
  }

  function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
    y -= widgetTopHeight(lineObj);
    var end = lineObj.text.length;
    var begin = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch - 1).bottom <= y; }, end, 0);
    end = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch).top > y; }, begin, end);
    return {begin: begin, end: end}
  }

  function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
    if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
    var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top;
    return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
  }

  // Returns true if the given side of a box is after the given
  // coordinates, in top-to-bottom, left-to-right order.
  function boxIsAfter(box, x, y, left) {
    return box.bottom <= y ? false : box.top > y ? true : (left ? box.left : box.right) > x
  }

  function coordsCharInner(cm, lineObj, lineNo, x, y) {
    // Move y into line-local coordinate space
    y -= heightAtLine(lineObj);
    var preparedMeasure = prepareMeasureForLine(cm, lineObj);
    // When directly calling `measureCharPrepared`, we have to adjust
    // for the widgets at this line.
    var widgetHeight = widgetTopHeight(lineObj);
    var begin = 0, end = lineObj.text.length, ltr = true;

    var order = getOrder(lineObj, cm.doc.direction);
    // If the line isn't plain left-to-right text, first figure out
    // which bidi section the coordinates fall into.
    if (order) {
      var part = (cm.options.lineWrapping ? coordsBidiPartWrapped : coordsBidiPart)
                   (cm, lineObj, lineNo, preparedMeasure, order, x, y);
      ltr = part.level != 1;
      // The awkward -1 offsets are needed because findFirst (called
      // on these below) will treat its first bound as inclusive,
      // second as exclusive, but we want to actually address the
      // characters in the part's range
      begin = ltr ? part.from : part.to - 1;
      end = ltr ? part.to : part.from - 1;
    }

    // A binary search to find the first character whose bounding box
    // starts after the coordinates. If we run across any whose box wrap
    // the coordinates, store that.
    var chAround = null, boxAround = null;
    var ch = findFirst(function (ch) {
      var box = measureCharPrepared(cm, preparedMeasure, ch);
      box.top += widgetHeight; box.bottom += widgetHeight;
      if (!boxIsAfter(box, x, y, false)) { return false }
      if (box.top <= y && box.left <= x) {
        chAround = ch;
        boxAround = box;
      }
      return true
    }, begin, end);

    var baseX, sticky, outside = false;
    // If a box around the coordinates was found, use that
    if (boxAround) {
      // Distinguish coordinates nearer to the left or right side of the box
      var atLeft = x - boxAround.left < boxAround.right - x, atStart = atLeft == ltr;
      ch = chAround + (atStart ? 0 : 1);
      sticky = atStart ? "after" : "before";
      baseX = atLeft ? boxAround.left : boxAround.right;
    } else {
      // (Adjust for extended bound, if necessary.)
      if (!ltr && (ch == end || ch == begin)) { ch++; }
      // To determine which side to associate with, get the box to the
      // left of the character and compare it's vertical position to the
      // coordinates
      sticky = ch == 0 ? "after" : ch == lineObj.text.length ? "before" :
        (measureCharPrepared(cm, preparedMeasure, ch - (ltr ? 1 : 0)).bottom + widgetHeight <= y) == ltr ?
        "after" : "before";
      // Now get accurate coordinates for this place, in order to get a
      // base X position
      var coords = cursorCoords(cm, Pos(lineNo, ch, sticky), "line", lineObj, preparedMeasure);
      baseX = coords.left;
      outside = y < coords.top ? -1 : y >= coords.bottom ? 1 : 0;
    }

    ch = skipExtendingChars(lineObj.text, ch, 1);
    return PosWithInfo(lineNo, ch, sticky, outside, x - baseX)
  }

  function coordsBidiPart(cm, lineObj, lineNo, preparedMeasure, order, x, y) {
    // Bidi parts are sorted left-to-right, and in a non-line-wrapping
    // situation, we can take this ordering to correspond to the visual
    // ordering. This finds the first part whose end is after the given
    // coordinates.
    var index = findFirst(function (i) {
      var part = order[i], ltr = part.level != 1;
      return boxIsAfter(cursorCoords(cm, Pos(lineNo, ltr ? part.to : part.from, ltr ? "before" : "after"),
                                     "line", lineObj, preparedMeasure), x, y, true)
    }, 0, order.length - 1);
    var part = order[index];
    // If this isn't the first part, the part's start is also after
    // the coordinates, and the coordinates aren't on the same line as
    // that start, move one part back.
    if (index > 0) {
      var ltr = part.level != 1;
      var start = cursorCoords(cm, Pos(lineNo, ltr ? part.from : part.to, ltr ? "after" : "before"),
                               "line", lineObj, preparedMeasure);
      if (boxIsAfter(start, x, y, true) && start.top > y)
        { part = order[index - 1]; }
    }
    return part
  }

  function coordsBidiPartWrapped(cm, lineObj, _lineNo, preparedMeasure, order, x, y) {
    // In a wrapped line, rtl text on wrapping boundaries can do things
    // that don't correspond to the ordering in our `order` array at
    // all, so a binary search doesn't work, and we want to return a
    // part that only spans one line so that the binary search in
    // coordsCharInner is safe. As such, we first find the extent of the
    // wrapped line, and then do a flat search in which we discard any
    // spans that aren't on the line.
    var ref = wrappedLineExtent(cm, lineObj, preparedMeasure, y);
    var begin = ref.begin;
    var end = ref.end;
    if (/\s/.test(lineObj.text.charAt(end - 1))) { end--; }
    var part = null, closestDist = null;
    for (var i = 0; i < order.length; i++) {
      var p = order[i];
      if (p.from >= end || p.to <= begin) { continue }
      var ltr = p.level != 1;
      var endX = measureCharPrepared(cm, preparedMeasure, ltr ? Math.min(end, p.to) - 1 : Math.max(begin, p.from)).right;
      // Weigh against spans ending before this, so that they are only
      // picked if nothing ends after
      var dist = endX < x ? x - endX + 1e9 : endX - x;
      if (!part || closestDist > dist) {
        part = p;
        closestDist = dist;
      }
    }
    if (!part) { part = order[order.length - 1]; }
    // Clip the part to the wrapped line.
    if (part.from < begin) { part = {from: begin, to: part.to, level: part.level}; }
    if (part.to > end) { part = {from: part.from, to: end, level: part.level}; }
    return part
  }

  var measureText;
  // Compute the default text height.
  function textHeight(display) {
    if (display.cachedTextHeight != null) { return display.cachedTextHeight }
    if (measureText == null) {
      measureText = elt("pre", null, "CodeMirror-line-like");
      // Measure a bunch of lines, for browsers that compute
      // fractional heights.
      for (var i = 0; i < 49; ++i) {
        measureText.appendChild(document.createTextNode("x"));
        measureText.appendChild(elt("br"));
      }
      measureText.appendChild(document.createTextNode("x"));
    }
    removeChildrenAndAdd(display.measure, measureText);
    var height = measureText.offsetHeight / 50;
    if (height > 3) { display.cachedTextHeight = height; }
    removeChildren(display.measure);
    return height || 1
  }

  // Compute the default character width.
  function charWidth(display) {
    if (display.cachedCharWidth != null) { return display.cachedCharWidth }
    var anchor = elt("span", "xxxxxxxxxx");
    var pre = elt("pre", [anchor], "CodeMirror-line-like");
    removeChildrenAndAdd(display.measure, pre);
    var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
    if (width > 2) { display.cachedCharWidth = width; }
    return width || 10
  }

  // Do a bulk-read of the DOM positions and sizes needed to draw the
  // view, so that we don't interleave reading and writing to the DOM.
  function getDimensions(cm) {
    var d = cm.display, left = {}, width = {};
    var gutterLeft = d.gutters.clientLeft;
    for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
      var id = cm.display.gutterSpecs[i].className;
      left[id] = n.offsetLeft + n.clientLeft + gutterLeft;
      width[id] = n.clientWidth;
    }
    return {fixedPos: compensateForHScroll(d),
            gutterTotalWidth: d.gutters.offsetWidth,
            gutterLeft: left,
            gutterWidth: width,
            wrapperWidth: d.wrapper.clientWidth}
  }

  // Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
  // but using getBoundingClientRect to get a sub-pixel-accurate
  // result.
  function compensateForHScroll(display) {
    return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
  }

  // Returns a function that estimates the height of a line, to use as
  // first approximation until the line becomes visible (and is thus
  // properly measurable).
  function estimateHeight(cm) {
    var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
    var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
    return function (line) {
      if (lineIsHidden(cm.doc, line)) { return 0 }

      var widgetsHeight = 0;
      if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
        if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height; }
      } }

      if (wrapping)
        { return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
      else
        { return widgetsHeight + th }
    }
  }

  function estimateLineHeights(cm) {
    var doc = cm.doc, est = estimateHeight(cm);
    doc.iter(function (line) {
      var estHeight = est(line);
      if (estHeight != line.height) { updateLineHeight(line, estHeight); }
    });
  }

  // Given a mouse event, find the corresponding position. If liberal
  // is false, it checks whether a gutter or scrollbar was clicked,
  // and returns null if it was. forRect is used by rectangular
  // selections, and tries to estimate a character position even for
  // coordinates beyond the right of the text.
  function posFromMouse(cm, e, liberal, forRect) {
    var display = cm.display;
    if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }

    var x, y, space = display.lineSpace.getBoundingClientRect();
    // Fails unpredictably on IE[67] when mouse is dragged around quickly.
    try { x = e.clientX - space.left; y = e.clientY - space.top; }
    catch (e$1) { return null }
    var coords = coordsChar(cm, x, y), line;
    if (forRect && coords.xRel > 0 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
      var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
      coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
    }
    return coords
  }

  // Find the view element corresponding to a given line. Return null
  // when the line isn't visible.
  function findViewIndex(cm, n) {
    if (n >= cm.display.viewTo) { return null }
    n -= cm.display.viewFrom;
    if (n < 0) { return null }
    var view = cm.display.view;
    for (var i = 0; i < view.length; i++) {
      n -= view[i].size;
      if (n < 0) { return i }
    }
  }

  // Updates the display.view data structure for a given change to the
  // document. From and to are in pre-change coordinates. Lendiff is
  // the amount of lines added or subtracted by the change. This is
  // used for changes that span multiple lines, or change the way
  // lines are divided into visual lines. regLineChange (below)
  // registers single-line changes.
  function regChange(cm, from, to, lendiff) {
    if (from == null) { from = cm.doc.first; }
    if (to == null) { to = cm.doc.first + cm.doc.size; }
    if (!lendiff) { lendiff = 0; }

    var display = cm.display;
    if (lendiff && to < display.viewTo &&
        (display.updateLineNumbers == null || display.updateLineNumbers > from))
      { display.updateLineNumbers = from; }

    cm.curOp.viewChanged = true;

    if (from >= display.viewTo) { // Change after
      if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
        { resetView(cm); }
    } else if (to <= display.viewFrom) { // Change before
      if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
        resetView(cm);
      } else {
        display.viewFrom += lendiff;
        display.viewTo += lendiff;
      }
    } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
      resetView(cm);
    } else if (from <= display.viewFrom) { // Top overlap
      var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
      if (cut) {
        display.view = display.view.slice(cut.index);
        display.viewFrom = cut.lineN;
        display.viewTo += lendiff;
      } else {
        resetView(cm);
      }
    } else if (to >= display.viewTo) { // Bottom overlap
      var cut$1 = viewCuttingPoint(cm, from, from, -1);
      if (cut$1) {
        display.view = display.view.slice(0, cut$1.index);
        display.viewTo = cut$1.lineN;
      } else {
        resetView(cm);
      }
    } else { // Gap in the middle
      var cutTop = viewCuttingPoint(cm, from, from, -1);
      var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
      if (cutTop && cutBot) {
        display.view = display.view.slice(0, cutTop.index)
          .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
          .concat(display.view.slice(cutBot.index));
        display.viewTo += lendiff;
      } else {
        resetView(cm);
      }
    }

    var ext = display.externalMeasured;
    if (ext) {
      if (to < ext.lineN)
        { ext.lineN += lendiff; }
      else if (from < ext.lineN + ext.size)
        { display.externalMeasured = null; }
    }
  }

  // Register a change to a single line. Type must be one of "text",
  // "gutter", "class", "widget"
  function regLineChange(cm, line, type) {
    cm.curOp.viewChanged = true;
    var display = cm.display, ext = cm.display.externalMeasured;
    if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
      { display.externalMeasured = null; }

    if (line < display.viewFrom || line >= display.viewTo) { return }
    var lineView = display.view[findViewIndex(cm, line)];
    if (lineView.node == null) { return }
    var arr = lineView.changes || (lineView.changes = []);
    if (indexOf(arr, type) == -1) { arr.push(type); }
  }

  // Clear the view.
  function resetView(cm) {
    cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
    cm.display.view = [];
    cm.display.viewOffset = 0;
  }

  function viewCuttingPoint(cm, oldN, newN, dir) {
    var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
    if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
      { return {index: index, lineN: newN} }
    var n = cm.display.viewFrom;
    for (var i = 0; i < index; i++)
      { n += view[i].size; }
    if (n != oldN) {
      if (dir > 0) {
        if (index == view.length - 1) { return null }
        diff = (n + view[index].size) - oldN;
        index++;
      } else {
        diff = n - oldN;
      }
      oldN += diff; newN += diff;
    }
    while (visualLineNo(cm.doc, newN) != newN) {
      if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
      newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
      index += dir;
    }
    return {index: index, lineN: newN}
  }

  // Force the view to cover a given range, adding empty view element
  // or clipping off existing ones as needed.
  function adjustView(cm, from, to) {
    var display = cm.display, view = display.view;
    if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
      display.view = buildViewArray(cm, from, to);
      display.viewFrom = from;
    } else {
      if (display.viewFrom > from)
        { display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view); }
      else if (display.viewFrom < from)
        { display.view = display.view.slice(findViewIndex(cm, from)); }
      display.viewFrom = from;
      if (display.viewTo < to)
        { display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)); }
      else if (display.viewTo > to)
        { display.view = display.view.slice(0, findViewIndex(cm, to)); }
    }
    display.viewTo = to;
  }

  // Count the number of lines in the view whose DOM representation is
  // out of date (or nonexistent).
  function countDirtyView(cm) {
    var view = cm.display.view, dirty = 0;
    for (var i = 0; i < view.length; i++) {
      var lineView = view[i];
      if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty; }
    }
    return dirty
  }

  function updateSelection(cm) {
    cm.display.input.showSelection(cm.display.input.prepareSelection());
  }

  function prepareSelection(cm, primary) {
    if ( primary === void 0 ) primary = true;

    var doc = cm.doc, result = {};
    var curFragment = result.cursors = document.createDocumentFragment();
    var selFragment = result.selection = document.createDocumentFragment();

    var customCursor = cm.options.$customCursor;
    if (customCursor) { primary = true; }
    for (var i = 0; i < doc.sel.ranges.length; i++) {
      if (!primary && i == doc.sel.primIndex) { continue }
      var range = doc.sel.ranges[i];
      if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) { continue }
      var collapsed = range.empty();
      if (customCursor) {
        var head = customCursor(cm, range);
        if (head) { drawSelectionCursor(cm, head, curFragment); }
      } else if (collapsed || cm.options.showCursorWhenSelecting) {
        drawSelectionCursor(cm, range.head, curFragment);
      }
      if (!collapsed)
        { drawSelectionRange(cm, range, selFragment); }
    }
    return result
  }

  // Draws a cursor for the given range
  function drawSelectionCursor(cm, head, output) {
    var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);

    var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
    cursor.style.left = pos.left + "px";
    cursor.style.top = pos.top + "px";
    cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";

    if (/\bcm-fat-cursor\b/.test(cm.getWrapperElement().className)) {
      var charPos = charCoords(cm, head, "div", null, null);
      var width = charPos.right - charPos.left;
      cursor.style.width = (width > 0 ? width : cm.defaultCharWidth()) + "px";
    }

    if (pos.other) {
      // Secondary cursor, shown when on a 'jump' in bi-directional text
      var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
      otherCursor.style.display = "";
      otherCursor.style.left = pos.other.left + "px";
      otherCursor.style.top = pos.other.top + "px";
      otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
    }
  }

  function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }

  // Draws the given range as a highlighted selection
  function drawSelectionRange(cm, range, output) {
    var display = cm.display, doc = cm.doc;
    var fragment = document.createDocumentFragment();
    var padding = paddingH(cm.display), leftSide = padding.left;
    var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;
    var docLTR = doc.direction == "ltr";

    function add(left, top, width, bottom) {
      if (top < 0) { top = 0; }
      top = Math.round(top);
      bottom = Math.round(bottom);
      fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n                             top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n                             height: " + (bottom - top) + "px")));
    }

    function drawForLine(line, fromArg, toArg) {
      var lineObj = getLine(doc, line);
      var lineLen = lineObj.text.length;
      var start, end;
      function coords(ch, bias) {
        return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
      }

      function wrapX(pos, dir, side) {
        var extent = wrappedLineExtentChar(cm, lineObj, null, pos);
        var prop = (dir == "ltr") == (side == "after") ? "left" : "right";
        var ch = side == "after" ? extent.begin : extent.end - (/\s/.test(lineObj.text.charAt(extent.end - 1)) ? 2 : 1);
        return coords(ch, prop)[prop]
      }

      var order = getOrder(lineObj, doc.direction);
      iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir, i) {
        var ltr = dir == "ltr";
        var fromPos = coords(from, ltr ? "left" : "right");
        var toPos = coords(to - 1, ltr ? "right" : "left");

        var openStart = fromArg == null && from == 0, openEnd = toArg == null && to == lineLen;
        var first = i == 0, last = !order || i == order.length - 1;
        if (toPos.top - fromPos.top <= 3) { // Single line
          var openLeft = (docLTR ? openStart : openEnd) && first;
          var openRight = (docLTR ? openEnd : openStart) && last;
          var left = openLeft ? leftSide : (ltr ? fromPos : toPos).left;
          var right = openRight ? rightSide : (ltr ? toPos : fromPos).right;
          add(left, fromPos.top, right - left, fromPos.bottom);
        } else { // Multiple lines
          var topLeft, topRight, botLeft, botRight;
          if (ltr) {
            topLeft = docLTR && openStart && first ? leftSide : fromPos.left;
            topRight = docLTR ? rightSide : wrapX(from, dir, "before");
            botLeft = docLTR ? leftSide : wrapX(to, dir, "after");
            botRight = docLTR && openEnd && last ? rightSide : toPos.right;
          } else {
            topLeft = !docLTR ? leftSide : wrapX(from, dir, "before");
            topRight = !docLTR && openStart && first ? rightSide : fromPos.right;
            botLeft = !docLTR && openEnd && last ? leftSide : toPos.left;
            botRight = !docLTR ? rightSide : wrapX(to, dir, "after");
          }
          add(topLeft, fromPos.top, topRight - topLeft, fromPos.bottom);
          if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top); }
          add(botLeft, toPos.top, botRight - botLeft, toPos.bottom);
        }

        if (!start || cmpCoords(fromPos, start) < 0) { start = fromPos; }
        if (cmpCoords(toPos, start) < 0) { start = toPos; }
        if (!end || cmpCoords(fromPos, end) < 0) { end = fromPos; }
        if (cmpCoords(toPos, end) < 0) { end = toPos; }
      });
      return {start: start, end: end}
    }

    var sFrom = range.from(), sTo = range.to();
    if (sFrom.line == sTo.line) {
      drawForLine(sFrom.line, sFrom.ch, sTo.ch);
    } else {
      var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
      var singleVLine = visualLine(fromLine) == visualLine(toLine);
      var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
      var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
      if (singleVLine) {
        if (leftEnd.top < rightStart.top - 2) {
          add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
          add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
        } else {
          add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
        }
      }
      if (leftEnd.bottom < rightStart.top)
        { add(leftSide, leftEnd.bottom, null, rightStart.top); }
    }

    output.appendChild(fragment);
  }

  // Cursor-blinking
  function restartBlink(cm) {
    if (!cm.state.focused) { return }
    var display = cm.display;
    clearInterval(display.blinker);
    var on = true;
    display.cursorDiv.style.visibility = "";
    if (cm.options.cursorBlinkRate > 0)
      { display.blinker = setInterval(function () {
        if (!cm.hasFocus()) { onBlur(cm); }
        display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden";
      }, cm.options.cursorBlinkRate); }
    else if (cm.options.cursorBlinkRate < 0)
      { display.cursorDiv.style.visibility = "hidden"; }
  }

  function ensureFocus(cm) {
    if (!cm.hasFocus()) {
      cm.display.input.focus();
      if (!cm.state.focused) { onFocus(cm); }
    }
  }

  function delayBlurEvent(cm) {
    cm.state.delayingBlurEvent = true;
    setTimeout(function () { if (cm.state.delayingBlurEvent) {
      cm.state.delayingBlurEvent = false;
      if (cm.state.focused) { onBlur(cm); }
    } }, 100);
  }

  function onFocus(cm, e) {
    if (cm.state.delayingBlurEvent && !cm.state.draggingText) { cm.state.delayingBlurEvent = false; }

    if (cm.options.readOnly == "nocursor") { return }
    if (!cm.state.focused) {
      signal(cm, "focus", cm, e);
      cm.state.focused = true;
      addClass(cm.display.wrapper, "CodeMirror-focused");
      // This test prevents this from firing when a context
      // menu is closed (since the input reset would kill the
      // select-all detection hack)
      if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
        cm.display.input.reset();
        if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20); } // Issue #1730
      }
      cm.display.input.receivedFocus();
    }
    restartBlink(cm);
  }
  function onBlur(cm, e) {
    if (cm.state.delayingBlurEvent) { return }

    if (cm.state.focused) {
      signal(cm, "blur", cm, e);
      cm.state.focused = false;
      rmClass(cm.display.wrapper, "CodeMirror-focused");
    }
    clearInterval(cm.display.blinker);
    setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false; } }, 150);
  }

  // Read the actual heights of the rendered lines, and update their
  // stored heights to match.
  function updateHeightsInViewport(cm) {
    var display = cm.display;
    var prevBottom = display.lineDiv.offsetTop;
    var viewTop = Math.max(0, display.scroller.getBoundingClientRect().top);
    var oldHeight = display.lineDiv.getBoundingClientRect().top;
    var mustScroll = 0;
    for (var i = 0; i < display.view.length; i++) {
      var cur = display.view[i], wrapping = cm.options.lineWrapping;
      var height = (void 0), width = 0;
      if (cur.hidden) { continue }
      oldHeight += cur.line.height;
      if (ie && ie_version < 8) {
        var bot = cur.node.offsetTop + cur.node.offsetHeight;
        height = bot - prevBottom;
        prevBottom = bot;
      } else {
        var box = cur.node.getBoundingClientRect();
        height = box.bottom - box.top;
        // Check that lines don't extend past the right of the current
        // editor width
        if (!wrapping && cur.text.firstChild)
          { width = cur.text.firstChild.getBoundingClientRect().right - box.left - 1; }
      }
      var diff = cur.line.height - height;
      if (diff > .005 || diff < -.005) {
        if (oldHeight < viewTop) { mustScroll -= diff; }
        updateLineHeight(cur.line, height);
        updateWidgetHeight(cur.line);
        if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
          { updateWidgetHeight(cur.rest[j]); } }
      }
      if (width > cm.display.sizerWidth) {
        var chWidth = Math.ceil(width / charWidth(cm.display));
        if (chWidth > cm.display.maxLineLength) {
          cm.display.maxLineLength = chWidth;
          cm.display.maxLine = cur.line;
          cm.display.maxLineChanged = true;
        }
      }
    }
    if (Math.abs(mustScroll) > 2) { display.scroller.scrollTop += mustScroll; }
  }

  // Read and store the height of line widgets associated with the
  // given line.
  function updateWidgetHeight(line) {
    if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i) {
      var w = line.widgets[i], parent = w.node.parentNode;
      if (parent) { w.height = parent.offsetHeight; }
    } }
  }

  // Compute the lines that are visible in a given viewport (defaults
  // the the current scroll position). viewport may contain top,
  // height, and ensure (see op.scrollToPos) properties.
  function visibleLines(display, doc, viewport) {
    var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
    top = Math.floor(top - paddingTop(display));
    var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;

    var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
    // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
    // forces those lines into the viewport (if possible).
    if (viewport && viewport.ensure) {
      var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
      if (ensureFrom < from) {
        from = ensureFrom;
        to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
      } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
        from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
        to = ensureTo;
      }
    }
    return {from: from, to: Math.max(to, from + 1)}
  }

  // SCROLLING THINGS INTO VIEW

  // If an editor sits on the top or bottom of the window, partially
  // scrolled out of view, this ensures that the cursor is visible.
  function maybeScrollWindow(cm, rect) {
    if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }

    var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
    var doc = display.wrapper.ownerDocument;
    if (rect.top + box.top < 0) { doScroll = true; }
    else if (rect.bottom + box.top > (doc.defaultView.innerHeight || doc.documentElement.clientHeight)) { doScroll = false; }
    if (doScroll != null && !phantom) {
      var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n                         top: " + (rect.top - display.viewOffset - paddingTop(cm.display)) + "px;\n                         height: " + (rect.bottom - rect.top + scrollGap(cm) + display.barHeight) + "px;\n                         left: " + (rect.left) + "px; width: " + (Math.max(2, rect.right - rect.left)) + "px;"));
      cm.display.lineSpace.appendChild(scrollNode);
      scrollNode.scrollIntoView(doScroll);
      cm.display.lineSpace.removeChild(scrollNode);
    }
  }

  // Scroll a given position into view (immediately), verifying that
  // it actually became visible (as line heights are accurately
  // measured, the position of something may 'drift' during drawing).
  function scrollPosIntoView(cm, pos, end, margin) {
    if (margin == null) { margin = 0; }
    var rect;
    if (!cm.options.lineWrapping && pos == end) {
      // Set pos and end to the cursor positions around the character pos sticks to
      // If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
      // If pos == Pos(_, 0, "before"), pos and end are unchanged
      end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos;
      pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos;
    }
    for (var limit = 0; limit < 5; limit++) {
      var changed = false;
      var coords = cursorCoords(cm, pos);
      var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
      rect = {left: Math.min(coords.left, endCoords.left),
              top: Math.min(coords.top, endCoords.top) - margin,
              right: Math.max(coords.left, endCoords.left),
              bottom: Math.max(coords.bottom, endCoords.bottom) + margin};
      var scrollPos = calculateScrollPos(cm, rect);
      var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
      if (scrollPos.scrollTop != null) {
        updateScrollTop(cm, scrollPos.scrollTop);
        if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true; }
      }
      if (scrollPos.scrollLeft != null) {
        setScrollLeft(cm, scrollPos.scrollLeft);
        if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true; }
      }
      if (!changed) { break }
    }
    return rect
  }

  // Scroll a given set of coordinates into view (immediately).
  function scrollIntoView(cm, rect) {
    var scrollPos = calculateScrollPos(cm, rect);
    if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop); }
    if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft); }
  }

  // Calculate a new scroll position needed to scroll the given
  // rectangle into view. Returns an object with scrollTop and
  // scrollLeft properties. When these are undefined, the
  // vertical/horizontal position does not need to be adjusted.
  function calculateScrollPos(cm, rect) {
    var display = cm.display, snapMargin = textHeight(cm.display);
    if (rect.top < 0) { rect.top = 0; }
    var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
    var screen = displayHeight(cm), result = {};
    if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen; }
    var docBottom = cm.doc.height + paddingVert(display);
    var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin;
    if (rect.top < screentop) {
      result.scrollTop = atTop ? 0 : rect.top;
    } else if (rect.bottom > screentop + screen) {
      var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen);
      if (newTop != screentop) { result.scrollTop = newTop; }
    }

    var gutterSpace = cm.options.fixedGutter ? 0 : display.gutters.offsetWidth;
    var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft - gutterSpace;
    var screenw = displayWidth(cm) - display.gutters.offsetWidth;
    var tooWide = rect.right - rect.left > screenw;
    if (tooWide) { rect.right = rect.left + screenw; }
    if (rect.left < 10)
      { result.scrollLeft = 0; }
    else if (rect.left < screenleft)
      { result.scrollLeft = Math.max(0, rect.left + gutterSpace - (tooWide ? 0 : 10)); }
    else if (rect.right > screenw + screenleft - 3)
      { result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw; }
    return result
  }

  // Store a relative adjustment to the scroll position in the current
  // operation (to be applied when the operation finishes).
  function addToScrollTop(cm, top) {
    if (top == null) { return }
    resolveScrollToPos(cm);
    cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;
  }

  // Make sure that at the end of the operation the current cursor is
  // shown.
  function ensureCursorVisible(cm) {
    resolveScrollToPos(cm);
    var cur = cm.getCursor();
    cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin};
  }

  function scrollToCoords(cm, x, y) {
    if (x != null || y != null) { resolveScrollToPos(cm); }
    if (x != null) { cm.curOp.scrollLeft = x; }
    if (y != null) { cm.curOp.scrollTop = y; }
  }

  function scrollToRange(cm, range) {
    resolveScrollToPos(cm);
    cm.curOp.scrollToPos = range;
  }

  // When an operation has its scrollToPos property set, and another
  // scroll action is applied before the end of the operation, this
  // 'simulates' scrolling that position into view in a cheap way, so
  // that the effect of intermediate scroll commands is not ignored.
  function resolveScrollToPos(cm) {
    var range = cm.curOp.scrollToPos;
    if (range) {
      cm.curOp.scrollToPos = null;
      var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to);
      scrollToCoordsRange(cm, from, to, range.margin);
    }
  }

  function scrollToCoordsRange(cm, from, to, margin) {
    var sPos = calculateScrollPos(cm, {
      left: Math.min(from.left, to.left),
      top: Math.min(from.top, to.top) - margin,
      right: Math.max(from.right, to.right),
      bottom: Math.max(from.bottom, to.bottom) + margin
    });
    scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop);
  }

  // Sync the scrollable area and scrollbars, ensure the viewport
  // covers the visible area.
  function updateScrollTop(cm, val) {
    if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
    if (!gecko) { updateDisplaySimple(cm, {top: val}); }
    setScrollTop(cm, val, true);
    if (gecko) { updateDisplaySimple(cm); }
    startWorker(cm, 100);
  }

  function setScrollTop(cm, val, forceScroll) {
    val = Math.max(0, Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val));
    if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
    cm.doc.scrollTop = val;
    cm.display.scrollbars.setScrollTop(val);
    if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val; }
  }

  // Sync scroller and scrollbar, ensure the gutter elements are
  // aligned.
  function setScrollLeft(cm, val, isScroller, forceScroll) {
    val = Math.max(0, Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth));
    if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
    cm.doc.scrollLeft = val;
    alignHorizontally(cm);
    if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val; }
    cm.display.scrollbars.setScrollLeft(val);
  }

  // SCROLLBARS

  // Prepare DOM reads needed to update the scrollbars. Done in one
  // shot to minimize update/measure roundtrips.
  function measureForScrollbars(cm) {
    var d = cm.display, gutterW = d.gutters.offsetWidth;
    var docH = Math.round(cm.doc.height + paddingVert(cm.display));
    return {
      clientHeight: d.scroller.clientHeight,
      viewHeight: d.wrapper.clientHeight,
      scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
      viewWidth: d.wrapper.clientWidth,
      barLeft: cm.options.fixedGutter ? gutterW : 0,
      docHeight: docH,
      scrollHeight: docH + scrollGap(cm) + d.barHeight,
      nativeBarWidth: d.nativeBarWidth,
      gutterWidth: gutterW
    }
  }

  var NativeScrollbars = function(place, scroll, cm) {
    this.cm = cm;
    var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
    var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
    vert.tabIndex = horiz.tabIndex = -1;
    place(vert); place(horiz);

    on(vert, "scroll", function () {
      if (vert.clientHeight) { scroll(vert.scrollTop, "vertical"); }
    });
    on(horiz, "scroll", function () {
      if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal"); }
    });

    this.checkedZeroWidth = false;
    // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
    if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px"; }
  };

  NativeScrollbars.prototype.update = function (measure) {
    var needsH = measure.scrollWidth > measure.clientWidth + 1;
    var needsV = measure.scrollHeight > measure.clientHeight + 1;
    var sWidth = measure.nativeBarWidth;

    if (needsV) {
      this.vert.style.display = "block";
      this.vert.style.bottom = needsH ? sWidth + "px" : "0";
      var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
      // A bug in IE8 can cause this value to be negative, so guard it.
      this.vert.firstChild.style.height =
        Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
    } else {
      this.vert.scrollTop = 0;
      this.vert.style.display = "";
      this.vert.firstChild.style.height = "0";
    }

    if (needsH) {
      this.horiz.style.display = "block";
      this.horiz.style.right = needsV ? sWidth + "px" : "0";
      this.horiz.style.left = measure.barLeft + "px";
      var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
      this.horiz.firstChild.style.width =
        Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
    } else {
      this.horiz.style.display = "";
      this.horiz.firstChild.style.width = "0";
    }

    if (!this.checkedZeroWidth && measure.clientHeight > 0) {
      if (sWidth == 0) { this.zeroWidthHack(); }
      this.checkedZeroWidth = true;
    }

    return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
  };

  NativeScrollbars.prototype.setScrollLeft = function (pos) {
    if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos; }
    if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz"); }
  };

  NativeScrollbars.prototype.setScrollTop = function (pos) {
    if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos; }
    if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert"); }
  };

  NativeScrollbars.prototype.zeroWidthHack = function () {
    var w = mac && !mac_geMountainLion ? "12px" : "18px";
    this.horiz.style.height = this.vert.style.width = w;
    this.horiz.style.visibility = this.vert.style.visibility = "hidden";
    this.disableHoriz = new Delayed;
    this.disableVert = new Delayed;
  };

  NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
    bar.style.visibility = "";
    function maybeDisable() {
      // To find out whether the scrollbar is still visible, we
      // check whether the element under the pixel in the bottom
      // right corner of the scrollbar box is the scrollbar box
      // itself (when the bar is still visible) or its filler child
      // (when the bar is hidden). If it is still visible, we keep
      // it enabled, if it's hidden, we disable pointer events.
      var box = bar.getBoundingClientRect();
      var elt = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
          : document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1);
      if (elt != bar) { bar.style.visibility = "hidden"; }
      else { delay.set(1000, maybeDisable); }
    }
    delay.set(1000, maybeDisable);
  };

  NativeScrollbars.prototype.clear = function () {
    var parent = this.horiz.parentNode;
    parent.removeChild(this.horiz);
    parent.removeChild(this.vert);
  };

  var NullScrollbars = function () {};

  NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
  NullScrollbars.prototype.setScrollLeft = function () {};
  NullScrollbars.prototype.setScrollTop = function () {};
  NullScrollbars.prototype.clear = function () {};

  function updateScrollbars(cm, measure) {
    if (!measure) { measure = measureForScrollbars(cm); }
    var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
    updateScrollbarsInner(cm, measure);
    for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
      if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
        { updateHeightsInViewport(cm); }
      updateScrollbarsInner(cm, measureForScrollbars(cm));
      startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
    }
  }

  // Re-synchronize the fake scrollbars with the actual size of the
  // content.
  function updateScrollbarsInner(cm, measure) {
    var d = cm.display;
    var sizes = d.scrollbars.update(measure);

    d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
    d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";
    d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent";

    if (sizes.right && sizes.bottom) {
      d.scrollbarFiller.style.display = "block";
      d.scrollbarFiller.style.height = sizes.bottom + "px";
      d.scrollbarFiller.style.width = sizes.right + "px";
    } else { d.scrollbarFiller.style.display = ""; }
    if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
      d.gutterFiller.style.display = "block";
      d.gutterFiller.style.height = sizes.bottom + "px";
      d.gutterFiller.style.width = measure.gutterWidth + "px";
    } else { d.gutterFiller.style.display = ""; }
  }

  var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};

  function initScrollbars(cm) {
    if (cm.display.scrollbars) {
      cm.display.scrollbars.clear();
      if (cm.display.scrollbars.addClass)
        { rmClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
    }

    cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
      cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
      // Prevent clicks in the scrollbars from killing focus
      on(node, "mousedown", function () {
        if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0); }
      });
      node.setAttribute("cm-not-content", "true");
    }, function (pos, axis) {
      if (axis == "horizontal") { setScrollLeft(cm, pos); }
      else { updateScrollTop(cm, pos); }
    }, cm);
    if (cm.display.scrollbars.addClass)
      { addClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
  }

  // Operations are used to wrap a series of changes to the editor
  // state in such a way that each change won't have to update the
  // cursor and display (which would be awkward, slow, and
  // error-prone). Instead, display updates are batched and then all
  // combined and executed at once.

  var nextOpId = 0;
  // Start a new operation.
  function startOperation(cm) {
    cm.curOp = {
      cm: cm,
      viewChanged: false,      // Flag that indicates that lines might need to be redrawn
      startHeight: cm.doc.height, // Used to detect need to update scrollbar
      forceUpdate: false,      // Used to force a redraw
      updateInput: 0,       // Whether to reset the input textarea
      typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
      changeObjs: null,        // Accumulated changes, for firing change events
      cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
      cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
      selectionChanged: false, // Whether the selection needs to be redrawn
      updateMaxLine: false,    // Set when the widest line needs to be determined anew
      scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
      scrollToPos: null,       // Used to scroll to a specific position
      focus: false,
      id: ++nextOpId,          // Unique ID
      markArrays: null         // Used by addMarkedSpan
    };
    pushOperation(cm.curOp);
  }

  // Finish an operation, updating the display and signalling delayed events
  function endOperation(cm) {
    var op = cm.curOp;
    if (op) { finishOperation(op, function (group) {
      for (var i = 0; i < group.ops.length; i++)
        { group.ops[i].cm.curOp = null; }
      endOperations(group);
    }); }
  }

  // The DOM updates done when an operation finishes are batched so
  // that the minimum number of relayouts are required.
  function endOperations(group) {
    var ops = group.ops;
    for (var i = 0; i < ops.length; i++) // Read DOM
      { endOperation_R1(ops[i]); }
    for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
      { endOperation_W1(ops[i$1]); }
    for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
      { endOperation_R2(ops[i$2]); }
    for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
      { endOperation_W2(ops[i$3]); }
    for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
      { endOperation_finish(ops[i$4]); }
  }

  function endOperation_R1(op) {
    var cm = op.cm, display = cm.display;
    maybeClipScrollbars(cm);
    if (op.updateMaxLine) { findMaxLine(cm); }

    op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
      op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
                         op.scrollToPos.to.line >= display.viewTo) ||
      display.maxLineChanged && cm.options.lineWrapping;
    op.update = op.mustUpdate &&
      new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
  }

  function endOperation_W1(op) {
    op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);
  }

  function endOperation_R2(op) {
    var cm = op.cm, display = cm.display;
    if (op.updatedDisplay) { updateHeightsInViewport(cm); }

    op.barMeasure = measureForScrollbars(cm);

    // If the max line changed since it was last measured, measure it,
    // and ensure the document's width matches it.
    // updateDisplay_W2 will use these properties to do the actual resizing
    if (display.maxLineChanged && !cm.options.lineWrapping) {
      op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
      cm.display.sizerWidth = op.adjustWidthTo;
      op.barMeasure.scrollWidth =
        Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
      op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));
    }

    if (op.updatedDisplay || op.selectionChanged)
      { op.preparedSelection = display.input.prepareSelection(); }
  }

  function endOperation_W2(op) {
    var cm = op.cm;

    if (op.adjustWidthTo != null) {
      cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
      if (op.maxScrollLeft < cm.doc.scrollLeft)
        { setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true); }
      cm.display.maxLineChanged = false;
    }

    var takeFocus = op.focus && op.focus == activeElt(doc(cm));
    if (op.preparedSelection)
      { cm.display.input.showSelection(op.preparedSelection, takeFocus); }
    if (op.updatedDisplay || op.startHeight != cm.doc.height)
      { updateScrollbars(cm, op.barMeasure); }
    if (op.updatedDisplay)
      { setDocumentHeight(cm, op.barMeasure); }

    if (op.selectionChanged) { restartBlink(cm); }

    if (cm.state.focused && op.updateInput)
      { cm.display.input.reset(op.typing); }
    if (takeFocus) { ensureFocus(op.cm); }
  }

  function endOperation_finish(op) {
    var cm = op.cm, display = cm.display, doc = cm.doc;

    if (op.updatedDisplay) { postUpdateDisplay(cm, op.update); }

    // Abort mouse wheel delta measurement, when scrolling explicitly
    if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
      { display.wheelStartX = display.wheelStartY = null; }

    // Propagate the scroll position to the actual DOM scroller
    if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll); }

    if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true); }
    // If we need to scroll a specific position into view, do so.
    if (op.scrollToPos) {
      var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
                                   clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
      maybeScrollWindow(cm, rect);
    }

    // Fire events for markers that are hidden/unidden by editing or
    // undoing
    var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
    if (hidden) { for (var i = 0; i < hidden.length; ++i)
      { if (!hidden[i].lines.length) { signal(hidden[i], "hide"); } } }
    if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
      { if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide"); } } }

    if (display.wrapper.offsetHeight)
      { doc.scrollTop = cm.display.scroller.scrollTop; }

    // Fire change events, and delayed event handlers
    if (op.changeObjs)
      { signal(cm, "changes", cm, op.changeObjs); }
    if (op.update)
      { op.update.finish(); }
  }

  // Run the given function in an operation
  function runInOp(cm, f) {
    if (cm.curOp) { return f() }
    startOperation(cm);
    try { return f() }
    finally { endOperation(cm); }
  }
  // Wraps a function in an operation. Returns the wrapped function.
  function operation(cm, f) {
    return function() {
      if (cm.curOp) { return f.apply(cm, arguments) }
      startOperation(cm);
      try { return f.apply(cm, arguments) }
      finally { endOperation(cm); }
    }
  }
  // Used to add methods to editor and doc instances, wrapping them in
  // operations.
  function methodOp(f) {
    return function() {
      if (this.curOp) { return f.apply(this, arguments) }
      startOperation(this);
      try { return f.apply(this, arguments) }
      finally { endOperation(this); }
    }
  }
  function docMethodOp(f) {
    return function() {
      var cm = this.cm;
      if (!cm || cm.curOp) { return f.apply(this, arguments) }
      startOperation(cm);
      try { return f.apply(this, arguments) }
      finally { endOperation(cm); }
    }
  }

  // HIGHLIGHT WORKER

  function startWorker(cm, time) {
    if (cm.doc.highlightFrontier < cm.display.viewTo)
      { cm.state.highlight.set(time, bind(highlightWorker, cm)); }
  }

  function highlightWorker(cm) {
    var doc = cm.doc;
    if (doc.highlightFrontier >= cm.display.viewTo) { return }
    var end = +new Date + cm.options.workTime;
    var context = getContextBefore(cm, doc.highlightFrontier);
    var changedLines = [];

    doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
      if (context.line >= cm.display.viewFrom) { // Visible
        var oldStyles = line.styles;
        var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null;
        var highlighted = highlightLine(cm, line, context, true);
        if (resetState) { context.state = resetState; }
        line.styles = highlighted.styles;
        var oldCls = line.styleClasses, newCls = highlighted.classes;
        if (newCls) { line.styleClasses = newCls; }
        else if (oldCls) { line.styleClasses = null; }
        var ischange = !oldStyles || oldStyles.length != line.styles.length ||
          oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
        for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i]; }
        if (ischange) { changedLines.push(context.line); }
        line.stateAfter = context.save();
        context.nextLine();
      } else {
        if (line.text.length <= cm.options.maxHighlightLength)
          { processLine(cm, line.text, context); }
        line.stateAfter = context.line % 5 == 0 ? context.save() : null;
        context.nextLine();
      }
      if (+new Date > end) {
        startWorker(cm, cm.options.workDelay);
        return true
      }
    });
    doc.highlightFrontier = context.line;
    doc.modeFrontier = Math.max(doc.modeFrontier, context.line);
    if (changedLines.length) { runInOp(cm, function () {
      for (var i = 0; i < changedLines.length; i++)
        { regLineChange(cm, changedLines[i], "text"); }
    }); }
  }

  // DISPLAY DRAWING

  var DisplayUpdate = function(cm, viewport, force) {
    var display = cm.display;

    this.viewport = viewport;
    // Store some values that we'll need later (but don't want to force a relayout for)
    this.visible = visibleLines(display, cm.doc, viewport);
    this.editorIsHidden = !display.wrapper.offsetWidth;
    this.wrapperHeight = display.wrapper.clientHeight;
    this.wrapperWidth = display.wrapper.clientWidth;
    this.oldDisplayWidth = displayWidth(cm);
    this.force = force;
    this.dims = getDimensions(cm);
    this.events = [];
  };

  DisplayUpdate.prototype.signal = function (emitter, type) {
    if (hasHandler(emitter, type))
      { this.events.push(arguments); }
  };
  DisplayUpdate.prototype.finish = function () {
    for (var i = 0; i < this.events.length; i++)
      { signal.apply(null, this.events[i]); }
  };

  function maybeClipScrollbars(cm) {
    var display = cm.display;
    if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
      display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
      display.heightForcer.style.height = scrollGap(cm) + "px";
      display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
      display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
      display.scrollbarsClipped = true;
    }
  }

  function selectionSnapshot(cm) {
    if (cm.hasFocus()) { return null }
    var active = activeElt(doc(cm));
    if (!active || !contains(cm.display.lineDiv, active)) { return null }
    var result = {activeElt: active};
    if (window.getSelection) {
      var sel = win(cm).getSelection();
      if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
        result.anchorNode = sel.anchorNode;
        result.anchorOffset = sel.anchorOffset;
        result.focusNode = sel.focusNode;
        result.focusOffset = sel.focusOffset;
      }
    }
    return result
  }

  function restoreSelection(snapshot) {
    if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt(snapshot.activeElt.ownerDocument)) { return }
    snapshot.activeElt.focus();
    if (!/^(INPUT|TEXTAREA)$/.test(snapshot.activeElt.nodeName) &&
        snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
      var doc = snapshot.activeElt.ownerDocument;
      var sel = doc.defaultView.getSelection(), range = doc.createRange();
      range.setEnd(snapshot.anchorNode, snapshot.anchorOffset);
      range.collapse(false);
      sel.removeAllRanges();
      sel.addRange(range);
      sel.extend(snapshot.focusNode, snapshot.focusOffset);
    }
  }

  // Does the actual updating of the line display. Bails out
  // (returning false) when there is nothing to be done and forced is
  // false.
  function updateDisplayIfNeeded(cm, update) {
    var display = cm.display, doc = cm.doc;

    if (update.editorIsHidden) {
      resetView(cm);
      return false
    }

    // Bail out if the visible area is already rendered and nothing changed.
    if (!update.force &&
        update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
        display.renderedView == display.view && countDirtyView(cm) == 0)
      { return false }

    if (maybeUpdateLineNumberWidth(cm)) {
      resetView(cm);
      update.dims = getDimensions(cm);
    }

    // Compute a suitable new viewport (from & to)
    var end = doc.first + doc.size;
    var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
    var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
    if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom); }
    if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo); }
    if (sawCollapsedSpans) {
      from = visualLineNo(cm.doc, from);
      to = visualLineEndNo(cm.doc, to);
    }

    var different = from != display.viewFrom || to != display.viewTo ||
      display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
    adjustView(cm, from, to);

    display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
    // Position the mover div to align with the current scroll position
    cm.display.mover.style.top = display.viewOffset + "px";

    var toUpdate = countDirtyView(cm);
    if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
        (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
      { return false }

    // For big changes, we hide the enclosing element during the
    // update, since that speeds up the operations on most browsers.
    var selSnapshot = selectionSnapshot(cm);
    if (toUpdate > 4) { display.lineDiv.style.display = "none"; }
    patchDisplay(cm, display.updateLineNumbers, update.dims);
    if (toUpdate > 4) { display.lineDiv.style.display = ""; }
    display.renderedView = display.view;
    // There might have been a widget with a focused element that got
    // hidden or updated, if so re-focus it.
    restoreSelection(selSnapshot);

    // Prevent selection and cursors from interfering with the scroll
    // width and height.
    removeChildren(display.cursorDiv);
    removeChildren(display.selectionDiv);
    display.gutters.style.height = display.sizer.style.minHeight = 0;

    if (different) {
      display.lastWrapHeight = update.wrapperHeight;
      display.lastWrapWidth = update.wrapperWidth;
      startWorker(cm, 400);
    }

    display.updateLineNumbers = null;

    return true
  }

  function postUpdateDisplay(cm, update) {
    var viewport = update.viewport;

    for (var first = true;; first = false) {
      if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
        // Clip forced viewport to actual scrollable area.
        if (viewport && viewport.top != null)
          { viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)}; }
        // Updated line heights might result in the drawn area not
        // actually covering the viewport. Keep looping until it does.
        update.visible = visibleLines(cm.display, cm.doc, viewport);
        if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
          { break }
      } else if (first) {
        update.visible = visibleLines(cm.display, cm.doc, viewport);
      }
      if (!updateDisplayIfNeeded(cm, update)) { break }
      updateHeightsInViewport(cm);
      var barMeasure = measureForScrollbars(cm);
      updateSelection(cm);
      updateScrollbars(cm, barMeasure);
      setDocumentHeight(cm, barMeasure);
      update.force = false;
    }

    update.signal(cm, "update", cm);
    if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
      update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
      cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;
    }
  }

  function updateDisplaySimple(cm, viewport) {
    var update = new DisplayUpdate(cm, viewport);
    if (updateDisplayIfNeeded(cm, update)) {
      updateHeightsInViewport(cm);
      postUpdateDisplay(cm, update);
      var barMeasure = measureForScrollbars(cm);
      updateSelection(cm);
      updateScrollbars(cm, barMeasure);
      setDocumentHeight(cm, barMeasure);
      update.finish();
    }
  }

  // Sync the actual display DOM structure with display.view, removing
  // nodes for lines that are no longer in view, and creating the ones
  // that are not there yet, and updating the ones that are out of
  // date.
  function patchDisplay(cm, updateNumbersFrom, dims) {
    var display = cm.display, lineNumbers = cm.options.lineNumbers;
    var container = display.lineDiv, cur = container.firstChild;

    function rm(node) {
      var next = node.nextSibling;
      // Works around a throw-scroll bug in OS X Webkit
      if (webkit && mac && cm.display.currentWheelTarget == node)
        { node.style.display = "none"; }
      else
        { node.parentNode.removeChild(node); }
      return next
    }

    var view = display.view, lineN = display.viewFrom;
    // Loop over the elements in the view, syncing cur (the DOM nodes
    // in display.lineDiv) with the view as we go.
    for (var i = 0; i < view.length; i++) {
      var lineView = view[i];
      if (lineView.hidden) ; else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
        var node = buildLineElement(cm, lineView, lineN, dims);
        container.insertBefore(node, cur);
      } else { // Already drawn
        while (cur != lineView.node) { cur = rm(cur); }
        var updateNumber = lineNumbers && updateNumbersFrom != null &&
          updateNumbersFrom <= lineN && lineView.lineNumber;
        if (lineView.changes) {
          if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false; }
          updateLineForChanges(cm, lineView, lineN, dims);
        }
        if (updateNumber) {
          removeChildren(lineView.lineNumber);
          lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
        }
        cur = lineView.node.nextSibling;
      }
      lineN += lineView.size;
    }
    while (cur) { cur = rm(cur); }
  }

  function updateGutterSpace(display) {
    var width = display.gutters.offsetWidth;
    display.sizer.style.marginLeft = width + "px";
    // Send an event to consumers responding to changes in gutter width.
    signalLater(display, "gutterChanged", display);
  }

  function setDocumentHeight(cm, measure) {
    cm.display.sizer.style.minHeight = measure.docHeight + "px";
    cm.display.heightForcer.style.top = measure.docHeight + "px";
    cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px";
  }

  // Re-align line numbers and gutter marks to compensate for
  // horizontal scrolling.
  function alignHorizontally(cm) {
    var display = cm.display, view = display.view;
    if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
    var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
    var gutterW = display.gutters.offsetWidth, left = comp + "px";
    for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
      if (cm.options.fixedGutter) {
        if (view[i].gutter)
          { view[i].gutter.style.left = left; }
        if (view[i].gutterBackground)
          { view[i].gutterBackground.style.left = left; }
      }
      var align = view[i].alignable;
      if (align) { for (var j = 0; j < align.length; j++)
        { align[j].style.left = left; } }
    } }
    if (cm.options.fixedGutter)
      { display.gutters.style.left = (comp + gutterW) + "px"; }
  }

  // Used to ensure that the line number gutter is still the right
  // size for the current document size. Returns true when an update
  // is needed.
  function maybeUpdateLineNumberWidth(cm) {
    if (!cm.options.lineNumbers) { return false }
    var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
    if (last.length != display.lineNumChars) {
      var test = display.measure.appendChild(elt("div", [elt("div", last)],
                                                 "CodeMirror-linenumber CodeMirror-gutter-elt"));
      var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
      display.lineGutter.style.width = "";
      display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1;
      display.lineNumWidth = display.lineNumInnerWidth + padding;
      display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
      display.lineGutter.style.width = display.lineNumWidth + "px";
      updateGutterSpace(cm.display);
      return true
    }
    return false
  }

  function getGutters(gutters, lineNumbers) {
    var result = [], sawLineNumbers = false;
    for (var i = 0; i < gutters.length; i++) {
      var name = gutters[i], style = null;
      if (typeof name != "string") { style = name.style; name = name.className; }
      if (name == "CodeMirror-linenumbers") {
        if (!lineNumbers) { continue }
        else { sawLineNumbers = true; }
      }
      result.push({className: name, style: style});
    }
    if (lineNumbers && !sawLineNumbers) { result.push({className: "CodeMirror-linenumbers", style: null}); }
    return result
  }

  // Rebuild the gutter elements, ensure the margin to the left of the
  // code matches their width.
  function renderGutters(display) {
    var gutters = display.gutters, specs = display.gutterSpecs;
    removeChildren(gutters);
    display.lineGutter = null;
    for (var i = 0; i < specs.length; ++i) {
      var ref = specs[i];
      var className = ref.className;
      var style = ref.style;
      var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + className));
      if (style) { gElt.style.cssText = style; }
      if (className == "CodeMirror-linenumbers") {
        display.lineGutter = gElt;
        gElt.style.width = (display.lineNumWidth || 1) + "px";
      }
    }
    gutters.style.display = specs.length ? "" : "none";
    updateGutterSpace(display);
  }

  function updateGutters(cm) {
    renderGutters(cm.display);
    regChange(cm);
    alignHorizontally(cm);
  }

  // The display handles the DOM integration, both for input reading
  // and content drawing. It holds references to DOM nodes and
  // display-related state.

  function Display(place, doc, input, options) {
    var d = this;
    this.input = input;

    // Covers bottom-right square when both scrollbars are present.
    d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
    d.scrollbarFiller.setAttribute("cm-not-content", "true");
    // Covers bottom of gutter when coverGutterNextToScrollbar is on
    // and h scrollbar is present.
    d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
    d.gutterFiller.setAttribute("cm-not-content", "true");
    // Will contain the actual code, positioned to cover the viewport.
    d.lineDiv = eltP("div", null, "CodeMirror-code");
    // Elements are added to these to represent selection and cursors.
    d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
    d.cursorDiv = elt("div", null, "CodeMirror-cursors");
    // A visibility: hidden element used to find the size of things.
    d.measure = elt("div", null, "CodeMirror-measure");
    // When lines outside of the viewport are measured, they are drawn in this.
    d.lineMeasure = elt("div", null, "CodeMirror-measure");
    // Wraps everything that needs to exist inside the vertically-padded coordinate system
    d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
                      null, "position: relative; outline: none");
    var lines = eltP("div", [d.lineSpace], "CodeMirror-lines");
    // Moved around its parent to cover visible view.
    d.mover = elt("div", [lines], null, "position: relative");
    // Set to the height of the document, allowing scrolling.
    d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
    d.sizerWidth = null;
    // Behavior of elts with overflow: auto and padding is
    // inconsistent across browsers. This is used to ensure the
    // scrollable area is big enough.
    d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
    // Will contain the gutters, if any.
    d.gutters = elt("div", null, "CodeMirror-gutters");
    d.lineGutter = null;
    // Actual scrollable element.
    d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
    d.scroller.setAttribute("tabIndex", "-1");
    // The element in which the editor lives.
    d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
    // See #6982. FIXME remove when this has been fixed for a while in Chrome
    if (chrome && chrome_version >= 105) { d.wrapper.style.clipPath = "inset(0px)"; }

    // This attribute is respected by automatic translation systems such as Google Translate,
    // and may also be respected by tools used by human translators.
    d.wrapper.setAttribute('translate', 'no');

    // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
    if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
    if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true; }

    if (place) {
      if (place.appendChild) { place.appendChild(d.wrapper); }
      else { place(d.wrapper); }
    }

    // Current rendered range (may be bigger than the view window).
    d.viewFrom = d.viewTo = doc.first;
    d.reportedViewFrom = d.reportedViewTo = doc.first;
    // Information about the rendered lines.
    d.view = [];
    d.renderedView = null;
    // Holds info about a single rendered line when it was rendered
    // for measurement, while not in view.
    d.externalMeasured = null;
    // Empty space (in pixels) above the view
    d.viewOffset = 0;
    d.lastWrapHeight = d.lastWrapWidth = 0;
    d.updateLineNumbers = null;

    d.nativeBarWidth = d.barHeight = d.barWidth = 0;
    d.scrollbarsClipped = false;

    // Used to only resize the line number gutter when necessary (when
    // the amount of lines crosses a boundary that makes its width change)
    d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
    // Set to true when a non-horizontal-scrolling line widget is
    // added. As an optimization, line widget aligning is skipped when
    // this is false.
    d.alignWidgets = false;

    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;

    // Tracks the maximum line length so that the horizontal scrollbar
    // can be kept static when scrolling.
    d.maxLine = null;
    d.maxLineLength = 0;
    d.maxLineChanged = false;

    // Used for measuring wheel scrolling granularity
    d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;

    // True when shift is held down.
    d.shift = false;

    // Used to track whether anything happened since the context menu
    // was opened.
    d.selForContextMenu = null;

    d.activeTouch = null;

    d.gutterSpecs = getGutters(options.gutters, options.lineNumbers);
    renderGutters(d);

    input.init(d);
  }

  // Since the delta values reported on mouse wheel events are
  // unstandardized between browsers and even browser versions, and
  // generally horribly unpredictable, this code starts by measuring
  // the scroll effect that the first few mouse wheel events have,
  // and, from that, detects the way it can convert deltas to pixel
  // offsets afterwards.
  //
  // The reason we want to know the amount a wheel event will scroll
  // is that it gives us a chance to update the display before the
  // actual scrolling happens, reducing flickering.

  var wheelSamples = 0, wheelPixelsPerUnit = null;
  // Fill in a browser-detected starting value on browsers where we
  // know one. These don't have to be accurate -- the result of them
  // being wrong would just be a slight flicker on the first wheel
  // scroll (if it is large enough).
  if (ie) { wheelPixelsPerUnit = -.53; }
  else if (gecko) { wheelPixelsPerUnit = 15; }
  else if (chrome) { wheelPixelsPerUnit = -.7; }
  else if (safari) { wheelPixelsPerUnit = -1/3; }

  function wheelEventDelta(e) {
    var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
    if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail; }
    if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail; }
    else if (dy == null) { dy = e.wheelDelta; }
    return {x: dx, y: dy}
  }
  function wheelEventPixels(e) {
    var delta = wheelEventDelta(e);
    delta.x *= wheelPixelsPerUnit;
    delta.y *= wheelPixelsPerUnit;
    return delta
  }

  function onScrollWheel(cm, e) {
    // On Chrome 102, viewport updates somehow stop wheel-based
    // scrolling. Turning off pointer events during the scroll seems
    // to avoid the issue.
    if (chrome && chrome_version == 102) {
      if (cm.display.chromeScrollHack == null) { cm.display.sizer.style.pointerEvents = "none"; }
      else { clearTimeout(cm.display.chromeScrollHack); }
      cm.display.chromeScrollHack = setTimeout(function () {
        cm.display.chromeScrollHack = null;
        cm.display.sizer.style.pointerEvents = "";
      }, 100);
    }
    var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;
    var pixelsPerUnit = wheelPixelsPerUnit;
    if (e.deltaMode === 0) {
      dx = e.deltaX;
      dy = e.deltaY;
      pixelsPerUnit = 1;
    }

    var display = cm.display, scroll = display.scroller;
    // Quit if there's nothing to scroll here
    var canScrollX = scroll.scrollWidth > scroll.clientWidth;
    var canScrollY = scroll.scrollHeight > scroll.clientHeight;
    if (!(dx && canScrollX || dy && canScrollY)) { return }

    // Webkit browsers on OS X abort momentum scrolls when the target
    // of the scroll event is removed from the scrollable element.
    // This hack (see related code in patchDisplay) makes sure the
    // element is kept around.
    if (dy && mac && webkit) {
      outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
        for (var i = 0; i < view.length; i++) {
          if (view[i].node == cur) {
            cm.display.currentWheelTarget = cur;
            break outer
          }
        }
      }
    }

    // On some browsers, horizontal scrolling will cause redraws to
    // happen before the gutter has been realigned, causing it to
    // wriggle around in a most unseemly way. When we have an
    // estimated pixels/delta value, we just handle horizontal
    // scrolling entirely here. It'll be slightly off from native, but
    // better than glitching out.
    if (dx && !gecko && !presto && pixelsPerUnit != null) {
      if (dy && canScrollY)
        { updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * pixelsPerUnit)); }
      setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * pixelsPerUnit));
      // Only prevent default scrolling if vertical scrolling is
      // actually possible. Otherwise, it causes vertical scroll
      // jitter on OSX trackpads when deltaX is small and deltaY
      // is large (issue #3579)
      if (!dy || (dy && canScrollY))
        { e_preventDefault(e); }
      display.wheelStartX = null; // Abort measurement, if in progress
      return
    }

    // 'Project' the visible viewport to cover the area that is being
    // scrolled into view (if we know enough to estimate it).
    if (dy && pixelsPerUnit != null) {
      var pixels = dy * pixelsPerUnit;
      var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
      if (pixels < 0) { top = Math.max(0, top + pixels - 50); }
      else { bot = Math.min(cm.doc.height, bot + pixels + 50); }
      updateDisplaySimple(cm, {top: top, bottom: bot});
    }

    if (wheelSamples < 20 && e.deltaMode !== 0) {
      if (display.wheelStartX == null) {
        display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
        display.wheelDX = dx; display.wheelDY = dy;
        setTimeout(function () {
          if (display.wheelStartX == null) { return }
          var movedX = scroll.scrollLeft - display.wheelStartX;
          var movedY = scroll.scrollTop - display.wheelStartY;
          var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
            (movedX && display.wheelDX && movedX / display.wheelDX);
          display.wheelStartX = display.wheelStartY = null;
          if (!sample) { return }
          wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
          ++wheelSamples;
        }, 200);
      } else {
        display.wheelDX += dx; display.wheelDY += dy;
      }
    }
  }

  // Selection objects are immutable. A new one is created every time
  // the selection changes. A selection is one or more non-overlapping
  // (and non-touching) ranges, sorted, and an integer that indicates
  // which one is the primary selection (the one that's scrolled into
  // view, that getCursor returns, etc).
  var Selection = function(ranges, primIndex) {
    this.ranges = ranges;
    this.primIndex = primIndex;
  };

  Selection.prototype.primary = function () { return this.ranges[this.primIndex] };

  Selection.prototype.equals = function (other) {
    if (other == this) { return true }
    if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
    for (var i = 0; i < this.ranges.length; i++) {
      var here = this.ranges[i], there = other.ranges[i];
      if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }
    }
    return true
  };

  Selection.prototype.deepCopy = function () {
    var out = [];
    for (var i = 0; i < this.ranges.length; i++)
      { out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i].head)); }
    return new Selection(out, this.primIndex)
  };

  Selection.prototype.somethingSelected = function () {
    for (var i = 0; i < this.ranges.length; i++)
      { if (!this.ranges[i].empty()) { return true } }
    return false
  };

  Selection.prototype.contains = function (pos, end) {
    if (!end) { end = pos; }
    for (var i = 0; i < this.ranges.length; i++) {
      var range = this.ranges[i];
      if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
        { return i }
    }
    return -1
  };

  var Range = function(anchor, head) {
    this.anchor = anchor; this.head = head;
  };

  Range.prototype.from = function () { return minPos(this.anchor, this.head) };
  Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
  Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };

  // Take an unsorted, potentially overlapping set of ranges, and
  // build a selection out of it. 'Consumes' ranges array (modifying
  // it).
  function normalizeSelection(cm, ranges, primIndex) {
    var mayTouch = cm && cm.options.selectionsMayTouch;
    var prim = ranges[primIndex];
    ranges.sort(function (a, b) { return cmp(a.from(), b.from()); });
    primIndex = indexOf(ranges, prim);
    for (var i = 1; i < ranges.length; i++) {
      var cur = ranges[i], prev = ranges[i - 1];
      var diff = cmp(prev.to(), cur.from());
      if (mayTouch && !cur.empty() ? diff > 0 : diff >= 0) {
        var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
        var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
        if (i <= primIndex) { --primIndex; }
        ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
      }
    }
    return new Selection(ranges, primIndex)
  }

  function simpleSelection(anchor, head) {
    return new Selection([new Range(anchor, head || anchor)], 0)
  }

  // Compute the position of the end of a change (its 'to' property
  // refers to the pre-change end).
  function changeEnd(change) {
    if (!change.text) { return change.to }
    return Pos(change.from.line + change.text.length - 1,
               lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
  }

  // Adjust a position to refer to the post-change position of the
  // same text, or the end of the change if the change covers it.
  function adjustForChange(pos, change) {
    if (cmp(pos, change.from) < 0) { return pos }
    if (cmp(pos, change.to) <= 0) { return changeEnd(change) }

    var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
    if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch; }
    return Pos(line, ch)
  }

  function computeSelAfterChange(doc, change) {
    var out = [];
    for (var i = 0; i < doc.sel.ranges.length; i++) {
      var range = doc.sel.ranges[i];
      out.push(new Range(adjustForChange(range.anchor, change),
                         adjustForChange(range.head, change)));
    }
    return normalizeSelection(doc.cm, out, doc.sel.primIndex)
  }

  function offsetPos(pos, old, nw) {
    if (pos.line == old.line)
      { return Pos(nw.line, pos.ch - old.ch + nw.ch) }
    else
      { return Pos(nw.line + (pos.line - old.line), pos.ch) }
  }

  // Used by replaceSelections to allow moving the selection to the
  // start or around the replaced test. Hint may be "start" or "around".
  function computeReplacedSel(doc, changes, hint) {
    var out = [];
    var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
    for (var i = 0; i < changes.length; i++) {
      var change = changes[i];
      var from = offsetPos(change.from, oldPrev, newPrev);
      var to = offsetPos(changeEnd(change), oldPrev, newPrev);
      oldPrev = change.to;
      newPrev = to;
      if (hint == "around") {
        var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
        out[i] = new Range(inv ? to : from, inv ? from : to);
      } else {
        out[i] = new Range(from, from);
      }
    }
    return new Selection(out, doc.sel.primIndex)
  }

  // Used to get the editor into a consistent state again when options change.

  function loadMode(cm) {
    cm.doc.mode = getMode(cm.options, cm.doc.modeOption);
    resetModeState(cm);
  }

  function resetModeState(cm) {
    cm.doc.iter(function (line) {
      if (line.stateAfter) { line.stateAfter = null; }
      if (line.styles) { line.styles = null; }
    });
    cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first;
    startWorker(cm, 100);
    cm.state.modeGen++;
    if (cm.curOp) { regChange(cm); }
  }

  // DOCUMENT DATA STRUCTURE

  // By default, updates that start and end at the beginning of a line
  // are treated specially, in order to make the association of line
  // widgets and marker elements with the text behave more intuitive.
  function isWholeLineUpdate(doc, change) {
    return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
      (!doc.cm || doc.cm.options.wholeLineUpdateBefore)
  }

  // Perform a change on the document data structure.
  function updateDoc(doc, change, markedSpans, estimateHeight) {
    function spansFor(n) {return markedSpans ? markedSpans[n] : null}
    function update(line, text, spans) {
      updateLine(line, text, spans, estimateHeight);
      signalLater(line, "change", line, change);
    }
    function linesFor(start, end) {
      var result = [];
      for (var i = start; i < end; ++i)
        { result.push(new Line(text[i], spansFor(i), estimateHeight)); }
      return result
    }

    var from = change.from, to = change.to, text = change.text;
    var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
    var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;

    // Adjust the line structure
    if (change.full) {
      doc.insert(0, linesFor(0, text.length));
      doc.remove(text.length, doc.size - text.length);
    } else if (isWholeLineUpdate(doc, change)) {
      // This is a whole-line replace. Treated specially to make
      // sure line objects move the way they are supposed to.
      var added = linesFor(0, text.length - 1);
      update(lastLine, lastLine.text, lastSpans);
      if (nlines) { doc.remove(from.line, nlines); }
      if (added.length) { doc.insert(from.line, added); }
    } else if (firstLine == lastLine) {
      if (text.length == 1) {
        update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
      } else {
        var added$1 = linesFor(1, text.length - 1);
        added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight));
        update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
        doc.insert(from.line + 1, added$1);
      }
    } else if (text.length == 1) {
      update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
      doc.remove(from.line + 1, nlines);
    } else {
      update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
      update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
      var added$2 = linesFor(1, text.length - 1);
      if (nlines > 1) { doc.remove(from.line + 1, nlines - 1); }
      doc.insert(from.line + 1, added$2);
    }

    signalLater(doc, "change", doc, change);
  }

  // Call f for all linked documents.
  function linkedDocs(doc, f, sharedHistOnly) {
    function propagate(doc, skip, sharedHist) {
      if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
        var rel = doc.linked[i];
        if (rel.doc == skip) { continue }
        var shared = sharedHist && rel.sharedHist;
        if (sharedHistOnly && !shared) { continue }
        f(rel.doc, shared);
        propagate(rel.doc, doc, shared);
      } }
    }
    propagate(doc, null, true);
  }

  // Attach a document to an editor.
  function attachDoc(cm, doc) {
    if (doc.cm) { throw new Error("This document is already in use.") }
    cm.doc = doc;
    doc.cm = cm;
    estimateLineHeights(cm);
    loadMode(cm);
    setDirectionClass(cm);
    cm.options.direction = doc.direction;
    if (!cm.options.lineWrapping) { findMaxLine(cm); }
    cm.options.mode = doc.modeOption;
    regChange(cm);
  }

  function setDirectionClass(cm) {
  (cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl");
  }

  function directionChanged(cm) {
    runInOp(cm, function () {
      setDirectionClass(cm);
      regChange(cm);
    });
  }

  function History(prev) {
    // Arrays of change events and selections. Doing something adds an
    // event to done and clears undo. Undoing moves events from done
    // to undone, redoing moves them in the other direction.
    this.done = []; this.undone = [];
    this.undoDepth = prev ? prev.undoDepth : Infinity;
    // Used to track when changes can be merged into a single undo
    // event
    this.lastModTime = this.lastSelTime = 0;
    this.lastOp = this.lastSelOp = null;
    this.lastOrigin = this.lastSelOrigin = null;
    // Used by the isClean() method
    this.generation = this.maxGeneration = prev ? prev.maxGeneration : 1;
  }

  // Create a history change event from an updateDoc-style change
  // object.
  function historyChangeFromChange(doc, change) {
    var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
    attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
    linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true);
    return histChange
  }

  // Pop all selection events off the end of a history array. Stop at
  // a change event.
  function clearSelectionEvents(array) {
    while (array.length) {
      var last = lst(array);
      if (last.ranges) { array.pop(); }
      else { break }
    }
  }

  // Find the top change event in the history. Pop off selection
  // events that are in the way.
  function lastChangeEvent(hist, force) {
    if (force) {
      clearSelectionEvents(hist.done);
      return lst(hist.done)
    } else if (hist.done.length && !lst(hist.done).ranges) {
      return lst(hist.done)
    } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
      hist.done.pop();
      return lst(hist.done)
    }
  }

  // Register a change in the history. Merges changes that are within
  // a single operation, or are close together with an origin that
  // allows merging (starting with "+") into a single event.
  function addChangeToHistory(doc, change, selAfter, opId) {
    var hist = doc.history;
    hist.undone.length = 0;
    var time = +new Date, cur;
    var last;

    if ((hist.lastOp == opId ||
         hist.lastOrigin == change.origin && change.origin &&
         ((change.origin.charAt(0) == "+" && hist.lastModTime > time - (doc.cm ? doc.cm.options.historyEventDelay : 500)) ||
          change.origin.charAt(0) == "*")) &&
        (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
      // Merge this change into the last event
      last = lst(cur.changes);
      if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
        // Optimized case for simple insertion -- don't want to add
        // new changesets for every character typed
        last.to = changeEnd(change);
      } else {
        // Add new sub-event
        cur.changes.push(historyChangeFromChange(doc, change));
      }
    } else {
      // Can not be merged, start a new event.
      var before = lst(hist.done);
      if (!before || !before.ranges)
        { pushSelectionToHistory(doc.sel, hist.done); }
      cur = {changes: [historyChangeFromChange(doc, change)],
             generation: hist.generation};
      hist.done.push(cur);
      while (hist.done.length > hist.undoDepth) {
        hist.done.shift();
        if (!hist.done[0].ranges) { hist.done.shift(); }
      }
    }
    hist.done.push(selAfter);
    hist.generation = ++hist.maxGeneration;
    hist.lastModTime = hist.lastSelTime = time;
    hist.lastOp = hist.lastSelOp = opId;
    hist.lastOrigin = hist.lastSelOrigin = change.origin;

    if (!last) { signal(doc, "historyAdded"); }
  }

  function selectionEventCanBeMerged(doc, origin, prev, sel) {
    var ch = origin.charAt(0);
    return ch == "*" ||
      ch == "+" &&
      prev.ranges.length == sel.ranges.length &&
      prev.somethingSelected() == sel.somethingSelected() &&
      new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
  }

  // Called whenever the selection changes, sets the new selection as
  // the pending selection in the history, and pushes the old pending
  // selection into the 'done' array when it was significantly
  // different (in number of selected ranges, emptiness, or time).
  function addSelectionToHistory(doc, sel, opId, options) {
    var hist = doc.history, origin = options && options.origin;

    // A new event is started when the previous origin does not match
    // the current, or the origins don't allow matching. Origins
    // starting with * are always merged, those starting with + are
    // merged when similar and close together in time.
    if (opId == hist.lastSelOp ||
        (origin && hist.lastSelOrigin == origin &&
         (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
          selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
      { hist.done[hist.done.length - 1] = sel; }
    else
      { pushSelectionToHistory(sel, hist.done); }

    hist.lastSelTime = +new Date;
    hist.lastSelOrigin = origin;
    hist.lastSelOp = opId;
    if (options && options.clearRedo !== false)
      { clearSelectionEvents(hist.undone); }
  }

  function pushSelectionToHistory(sel, dest) {
    var top = lst(dest);
    if (!(top && top.ranges && top.equals(sel)))
      { dest.push(sel); }
  }

  // Used to store marked span information in the history.
  function attachLocalSpans(doc, change, from, to) {
    var existing = change["spans_" + doc.id], n = 0;
    doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
      if (line.markedSpans)
        { (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans; }
      ++n;
    });
  }

  // When un/re-doing restores text containing marked spans, those
  // that have been explicitly cleared should not be restored.
  function removeClearedSpans(spans) {
    if (!spans) { return null }
    var out;
    for (var i = 0; i < spans.length; ++i) {
      if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i); } }
      else if (out) { out.push(spans[i]); }
    }
    return !out ? spans : out.length ? out : null
  }

  // Retrieve and filter the old marked spans stored in a change event.
  function getOldSpans(doc, change) {
    var found = change["spans_" + doc.id];
    if (!found) { return null }
    var nw = [];
    for (var i = 0; i < change.text.length; ++i)
      { nw.push(removeClearedSpans(found[i])); }
    return nw
  }

  // Used for un/re-doing changes from the history. Combines the
  // result of computing the existing spans with the set of spans that
  // existed in the history (so that deleting around a span and then
  // undoing brings back the span).
  function mergeOldSpans(doc, change) {
    var old = getOldSpans(doc, change);
    var stretched = stretchSpansOverChange(doc, change);
    if (!old) { return stretched }
    if (!stretched) { return old }

    for (var i = 0; i < old.length; ++i) {
      var oldCur = old[i], stretchCur = stretched[i];
      if (oldCur && stretchCur) {
        spans: for (var j = 0; j < stretchCur.length; ++j) {
          var span = stretchCur[j];
          for (var k = 0; k < oldCur.length; ++k)
            { if (oldCur[k].marker == span.marker) { continue spans } }
          oldCur.push(span);
        }
      } else if (stretchCur) {
        old[i] = stretchCur;
      }
    }
    return old
  }

  // Used both to provide a JSON-safe object in .getHistory, and, when
  // detaching a document, to split the history in two
  function copyHistoryArray(events, newGroup, instantiateSel) {
    var copy = [];
    for (var i = 0; i < events.length; ++i) {
      var event = events[i];
      if (event.ranges) {
        copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
        continue
      }
      var changes = event.changes, newChanges = [];
      copy.push({changes: newChanges});
      for (var j = 0; j < changes.length; ++j) {
        var change = changes[j], m = (void 0);
        newChanges.push({from: change.from, to: change.to, text: change.text});
        if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
          if (indexOf(newGroup, Number(m[1])) > -1) {
            lst(newChanges)[prop] = change[prop];
            delete change[prop];
          }
        } } }
      }
    }
    return copy
  }

  // The 'scroll' parameter given to many of these indicated whether
  // the new cursor position should be scrolled into view after
  // modifying the selection.

  // If shift is held or the extend flag is set, extends a range to
  // include a given position (and optionally a second position).
  // Otherwise, simply returns the range between the given positions.
  // Used for cursor motion and such.
  function extendRange(range, head, other, extend) {
    if (extend) {
      var anchor = range.anchor;
      if (other) {
        var posBefore = cmp(head, anchor) < 0;
        if (posBefore != (cmp(other, anchor) < 0)) {
          anchor = head;
          head = other;
        } else if (posBefore != (cmp(head, other) < 0)) {
          head = other;
        }
      }
      return new Range(anchor, head)
    } else {
      return new Range(other || head, head)
    }
  }

  // Extend the primary selection range, discard the rest.
  function extendSelection(doc, head, other, options, extend) {
    if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend); }
    setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options);
  }

  // Extend all selections (pos is an array of selections with length
  // equal the number of selections)
  function extendSelections(doc, heads, options) {
    var out = [];
    var extend = doc.cm && (doc.cm.display.shift || doc.extend);
    for (var i = 0; i < doc.sel.ranges.length; i++)
      { out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend); }
    var newSel = normalizeSelection(doc.cm, out, doc.sel.primIndex);
    setSelection(doc, newSel, options);
  }

  // Updates a single range in the selection.
  function replaceOneSelection(doc, i, range, options) {
    var ranges = doc.sel.ranges.slice(0);
    ranges[i] = range;
    setSelection(doc, normalizeSelection(doc.cm, ranges, doc.sel.primIndex), options);
  }

  // Reset the selection to a single range.
  function setSimpleSelection(doc, anchor, head, options) {
    setSelection(doc, simpleSelection(anchor, head), options);
  }

  // Give beforeSelectionChange handlers a change to influence a
  // selection update.
  function filterSelectionChange(doc, sel, options) {
    var obj = {
      ranges: sel.ranges,
      update: function(ranges) {
        this.ranges = [];
        for (var i = 0; i < ranges.length; i++)
          { this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
                                     clipPos(doc, ranges[i].head)); }
      },
      origin: options && options.origin
    };
    signal(doc, "beforeSelectionChange", doc, obj);
    if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj); }
    if (obj.ranges != sel.ranges) { return normalizeSelection(doc.cm, obj.ranges, obj.ranges.length - 1) }
    else { return sel }
  }

  function setSelectionReplaceHistory(doc, sel, options) {
    var done = doc.history.done, last = lst(done);
    if (last && last.ranges) {
      done[done.length - 1] = sel;
      setSelectionNoUndo(doc, sel, options);
    } else {
      setSelection(doc, sel, options);
    }
  }

  // Set a new selection.
  function setSelection(doc, sel, options) {
    setSelectionNoUndo(doc, sel, options);
    addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);
  }

  function setSelectionNoUndo(doc, sel, options) {
    if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
      { sel = filterSelectionChange(doc, sel, options); }

    var bias = options && options.bias ||
      (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
    setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));

    if (!(options && options.scroll === false) && doc.cm && doc.cm.getOption("readOnly") != "nocursor")
      { ensureCursorVisible(doc.cm); }
  }

  function setSelectionInner(doc, sel) {
    if (sel.equals(doc.sel)) { return }

    doc.sel = sel;

    if (doc.cm) {
      doc.cm.curOp.updateInput = 1;
      doc.cm.curOp.selectionChanged = true;
      signalCursorActivity(doc.cm);
    }
    signalLater(doc, "cursorActivity", doc);
  }

  // Verify that the selection does not partially select any atomic
  // marked ranges.
  function reCheckSelection(doc) {
    setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false));
  }

  // Return a selection that does not partially select any atomic
  // ranges.
  function skipAtomicInSelection(doc, sel, bias, mayClear) {
    var out;
    for (var i = 0; i < sel.ranges.length; i++) {
      var range = sel.ranges[i];
      var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
      var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
      var newHead = range.head == range.anchor ? newAnchor : skipAtomic(doc, range.head, old && old.head, bias, mayClear);
      if (out || newAnchor != range.anchor || newHead != range.head) {
        if (!out) { out = sel.ranges.slice(0, i); }
        out[i] = new Range(newAnchor, newHead);
      }
    }
    return out ? normalizeSelection(doc.cm, out, sel.primIndex) : sel
  }

  function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
    var line = getLine(doc, pos.line);
    if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
      var sp = line.markedSpans[i], m = sp.marker;

      // Determine if we should prevent the cursor being placed to the left/right of an atomic marker
      // Historically this was determined using the inclusiveLeft/Right option, but the new way to control it
      // is with selectLeft/Right
      var preventCursorLeft = ("selectLeft" in m) ? !m.selectLeft : m.inclusiveLeft;
      var preventCursorRight = ("selectRight" in m) ? !m.selectRight : m.inclusiveRight;

      if ((sp.from == null || (preventCursorLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
          (sp.to == null || (preventCursorRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
        if (mayClear) {
          signal(m, "beforeCursorEnter");
          if (m.explicitlyCleared) {
            if (!line.markedSpans) { break }
            else {--i; continue}
          }
        }
        if (!m.atomic) { continue }

        if (oldPos) {
          var near = m.find(dir < 0 ? 1 : -1), diff = (void 0);
          if (dir < 0 ? preventCursorRight : preventCursorLeft)
            { near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null); }
          if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
            { return skipAtomicInner(doc, near, pos, dir, mayClear) }
        }

        var far = m.find(dir < 0 ? -1 : 1);
        if (dir < 0 ? preventCursorLeft : preventCursorRight)
          { far = movePos(doc, far, dir, far.line == pos.line ? line : null); }
        return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
      }
    } }
    return pos
  }

  // Ensure a given position is not inside an atomic range.
  function skipAtomic(doc, pos, oldPos, bias, mayClear) {
    var dir = bias || 1;
    var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
        (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
        skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
        (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
    if (!found) {
      doc.cantEdit = true;
      return Pos(doc.first, 0)
    }
    return found
  }

  function movePos(doc, pos, dir, line) {
    if (dir < 0 && pos.ch == 0) {
      if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
      else { return null }
    } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
      if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
      else { return null }
    } else {
      return new Pos(pos.line, pos.ch + dir)
    }
  }

  function selectAll(cm) {
    cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);
  }

  // UPDATING

  // Allow "beforeChange" event handlers to influence a change
  function filterChange(doc, change, update) {
    var obj = {
      canceled: false,
      from: change.from,
      to: change.to,
      text: change.text,
      origin: change.origin,
      cancel: function () { return obj.canceled = true; }
    };
    if (update) { obj.update = function (from, to, text, origin) {
      if (from) { obj.from = clipPos(doc, from); }
      if (to) { obj.to = clipPos(doc, to); }
      if (text) { obj.text = text; }
      if (origin !== undefined) { obj.origin = origin; }
    }; }
    signal(doc, "beforeChange", doc, obj);
    if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj); }

    if (obj.canceled) {
      if (doc.cm) { doc.cm.curOp.updateInput = 2; }
      return null
    }
    return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
  }

  // Apply a change to a document, and add it to the document's
  // history, and propagating it to all linked documents.
  function makeChange(doc, change, ignoreReadOnly) {
    if (doc.cm) {
      if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
      if (doc.cm.state.suppressEdits) { return }
    }

    if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
      change = filterChange(doc, change, true);
      if (!change) { return }
    }

    // Possibly split or suppress the update based on the presence
    // of read-only spans in its range.
    var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
    if (split) {
      for (var i = split.length - 1; i >= 0; --i)
        { makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text, origin: change.origin}); }
    } else {
      makeChangeInner(doc, change);
    }
  }

  function makeChangeInner(doc, change) {
    if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
    var selAfter = computeSelAfterChange(doc, change);
    addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);

    makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
    var rebased = [];

    linkedDocs(doc, function (doc, sharedHist) {
      if (!sharedHist && indexOf(rebased, doc.history) == -1) {
        rebaseHist(doc.history, change);
        rebased.push(doc.history);
      }
      makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
    });
  }

  // Revert a change stored in a document's history.
  function makeChangeFromHistory(doc, type, allowSelectionOnly) {
    var suppress = doc.cm && doc.cm.state.suppressEdits;
    if (suppress && !allowSelectionOnly) { return }

    var hist = doc.history, event, selAfter = doc.sel;
    var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;

    // Verify that there is a useable event (so that ctrl-z won't
    // needlessly clear selection events)
    var i = 0;
    for (; i < source.length; i++) {
      event = source[i];
      if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
        { break }
    }
    if (i == source.length) { return }
    hist.lastOrigin = hist.lastSelOrigin = null;

    for (;;) {
      event = source.pop();
      if (event.ranges) {
        pushSelectionToHistory(event, dest);
        if (allowSelectionOnly && !event.equals(doc.sel)) {
          setSelection(doc, event, {clearRedo: false});
          return
        }
        selAfter = event;
      } else if (suppress) {
        source.push(event);
        return
      } else { break }
    }

    // Build up a reverse change object to add to the opposite history
    // stack (redo when undoing, and vice versa).
    var antiChanges = [];
    pushSelectionToHistory(selAfter, dest);
    dest.push({changes: antiChanges, generation: hist.generation});
    hist.generation = event.generation || ++hist.maxGeneration;

    var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");

    var loop = function ( i ) {
      var change = event.changes[i];
      change.origin = type;
      if (filter && !filterChange(doc, change, false)) {
        source.length = 0;
        return {}
      }

      antiChanges.push(historyChangeFromChange(doc, change));

      var after = i ? computeSelAfterChange(doc, change) : lst(source);
      makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
      if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}); }
      var rebased = [];

      // Propagate to the linked documents
      linkedDocs(doc, function (doc, sharedHist) {
        if (!sharedHist && indexOf(rebased, doc.history) == -1) {
          rebaseHist(doc.history, change);
          rebased.push(doc.history);
        }
        makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
      });
    };

    for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
      var returned = loop( i$1 );

      if ( returned ) return returned.v;
    }
  }

  // Sub-views need their line numbers shifted when text is added
  // above or below them in the parent document.
  function shiftDoc(doc, distance) {
    if (distance == 0) { return }
    doc.first += distance;
    doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
      Pos(range.anchor.line + distance, range.anchor.ch),
      Pos(range.head.line + distance, range.head.ch)
    ); }), doc.sel.primIndex);
    if (doc.cm) {
      regChange(doc.cm, doc.first, doc.first - distance, distance);
      for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
        { regLineChange(doc.cm, l, "gutter"); }
    }
  }

  // More lower-level change function, handling only a single document
  // (not linked ones).
  function makeChangeSingleDoc(doc, change, selAfter, spans) {
    if (doc.cm && !doc.cm.curOp)
      { return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }

    if (change.to.line < doc.first) {
      shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
      return
    }
    if (change.from.line > doc.lastLine()) { return }

    // Clip the change to the size of this doc
    if (change.from.line < doc.first) {
      var shift = change.text.length - 1 - (doc.first - change.from.line);
      shiftDoc(doc, shift);
      change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
                text: [lst(change.text)], origin: change.origin};
    }
    var last = doc.lastLine();
    if (change.to.line > last) {
      change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
                text: [change.text[0]], origin: change.origin};
    }

    change.removed = getBetween(doc, change.from, change.to);

    if (!selAfter) { selAfter = computeSelAfterChange(doc, change); }
    if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans); }
    else { updateDoc(doc, change, spans); }
    setSelectionNoUndo(doc, selAfter, sel_dontScroll);

    if (doc.cantEdit && skipAtomic(doc, Pos(doc.firstLine(), 0)))
      { doc.cantEdit = false; }
  }

  // Handle the interaction of a change to a document with the editor
  // that this document is part of.
  function makeChangeSingleDocInEditor(cm, change, spans) {
    var doc = cm.doc, display = cm.display, from = change.from, to = change.to;

    var recomputeMaxLength = false, checkWidthStart = from.line;
    if (!cm.options.lineWrapping) {
      checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
      doc.iter(checkWidthStart, to.line + 1, function (line) {
        if (line == display.maxLine) {
          recomputeMaxLength = true;
          return true
        }
      });
    }

    if (doc.sel.contains(change.from, change.to) > -1)
      { signalCursorActivity(cm); }

    updateDoc(doc, change, spans, estimateHeight(cm));

    if (!cm.options.lineWrapping) {
      doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
        var len = lineLength(line);
        if (len > display.maxLineLength) {
          display.maxLine = line;
          display.maxLineLength = len;
          display.maxLineChanged = true;
          recomputeMaxLength = false;
        }
      });
      if (recomputeMaxLength) { cm.curOp.updateMaxLine = true; }
    }

    retreatFrontier(doc, from.line);
    startWorker(cm, 400);

    var lendiff = change.text.length - (to.line - from.line) - 1;
    // Remember that these lines changed, for updating the display
    if (change.full)
      { regChange(cm); }
    else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
      { regLineChange(cm, from.line, "text"); }
    else
      { regChange(cm, from.line, to.line + 1, lendiff); }

    var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
    if (changeHandler || changesHandler) {
      var obj = {
        from: from, to: to,
        text: change.text,
        removed: change.removed,
        origin: change.origin
      };
      if (changeHandler) { signalLater(cm, "change", cm, obj); }
      if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj); }
    }
    cm.display.selForContextMenu = null;
  }

  function replaceRange(doc, code, from, to, origin) {
    var assign;

    if (!to) { to = from; }
    if (cmp(to, from) < 0) { (assign = [to, from], from = assign[0], to = assign[1]); }
    if (typeof code == "string") { code = doc.splitLines(code); }
    makeChange(doc, {from: from, to: to, text: code, origin: origin});
  }

  // Rebasing/resetting history to deal with externally-sourced changes

  function rebaseHistSelSingle(pos, from, to, diff) {
    if (to < pos.line) {
      pos.line += diff;
    } else if (from < pos.line) {
      pos.line = from;
      pos.ch = 0;
    }
  }

  // Tries to rebase an array of history events given a change in the
  // document. If the change touches the same lines as the event, the
  // event, and everything 'behind' it, is discarded. If the change is
  // before the event, the event's positions are updated. Uses a
  // copy-on-write scheme for the positions, to avoid having to
  // reallocate them all on every rebase, but also avoid problems with
  // shared position objects being unsafely updated.
  function rebaseHistArray(array, from, to, diff) {
    for (var i = 0; i < array.length; ++i) {
      var sub = array[i], ok = true;
      if (sub.ranges) {
        if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
        for (var j = 0; j < sub.ranges.length; j++) {
          rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
          rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
        }
        continue
      }
      for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
        var cur = sub.changes[j$1];
        if (to < cur.from.line) {
          cur.from = Pos(cur.from.line + diff, cur.from.ch);
          cur.to = Pos(cur.to.line + diff, cur.to.ch);
        } else if (from <= cur.to.line) {
          ok = false;
          break
        }
      }
      if (!ok) {
        array.splice(0, i + 1);
        i = 0;
      }
    }
  }

  function rebaseHist(hist, change) {
    var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
    rebaseHistArray(hist.done, from, to, diff);
    rebaseHistArray(hist.undone, from, to, diff);
  }

  // Utility for applying a change to a line by handle or number,
  // returning the number and optionally registering the line as
  // changed.
  function changeLine(doc, handle, changeType, op) {
    var no = handle, line = handle;
    if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)); }
    else { no = lineNo(handle); }
    if (no == null) { return null }
    if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType); }
    return line
  }

  // The document is represented as a BTree consisting of leaves, with
  // chunk of lines in them, and branches, with up to ten leaves or
  // other branch nodes below them. The top node is always a branch
  // node, and is the document object itself (meaning it has
  // additional methods and properties).
  //
  // All nodes have parent links. The tree is used both to go from
  // line numbers to line objects, and to go from objects to numbers.
  // It also indexes by height, and is used to convert between height
  // and line object, and to find the total height of the document.
  //
  // See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html

  function LeafChunk(lines) {
    this.lines = lines;
    this.parent = null;
    var height = 0;
    for (var i = 0; i < lines.length; ++i) {
      lines[i].parent = this;
      height += lines[i].height;
    }
    this.height = height;
  }

  LeafChunk.prototype = {
    chunkSize: function() { return this.lines.length },

    // Remove the n lines at offset 'at'.
    removeInner: function(at, n) {
      for (var i = at, e = at + n; i < e; ++i) {
        var line = this.lines[i];
        this.height -= line.height;
        cleanUpLine(line);
        signalLater(line, "delete");
      }
      this.lines.splice(at, n);
    },

    // Helper used to collapse a small branch into a single leaf.
    collapse: function(lines) {
      lines.push.apply(lines, this.lines);
    },

    // Insert the given array of lines at offset 'at', count them as
    // having the given height.
    insertInner: function(at, lines, height) {
      this.height += height;
      this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
      for (var i = 0; i < lines.length; ++i) { lines[i].parent = this; }
    },

    // Used to iterate over a part of the tree.
    iterN: function(at, n, op) {
      for (var e = at + n; at < e; ++at)
        { if (op(this.lines[at])) { return true } }
    }
  };

  function BranchChunk(children) {
    this.children = children;
    var size = 0, height = 0;
    for (var i = 0; i < children.length; ++i) {
      var ch = children[i];
      size += ch.chunkSize(); height += ch.height;
      ch.parent = this;
    }
    this.size = size;
    this.height = height;
    this.parent = null;
  }

  BranchChunk.prototype = {
    chunkSize: function() { return this.size },

    removeInner: function(at, n) {
      this.size -= n;
      for (var i = 0; i < this.children.length; ++i) {
        var child = this.children[i], sz = child.chunkSize();
        if (at < sz) {
          var rm = Math.min(n, sz - at), oldHeight = child.height;
          child.removeInner(at, rm);
          this.height -= oldHeight - child.height;
          if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
          if ((n -= rm) == 0) { break }
          at = 0;
        } else { at -= sz; }
      }
      // If the result is smaller than 25 lines, ensure that it is a
      // single leaf node.
      if (this.size - n < 25 &&
          (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
        var lines = [];
        this.collapse(lines);
        this.children = [new LeafChunk(lines)];
        this.children[0].parent = this;
      }
    },

    collapse: function(lines) {
      for (var i = 0; i < this.children.length; ++i) { this.children[i].collapse(lines); }
    },

    insertInner: function(at, lines, height) {
      this.size += lines.length;
      this.height += height;
      for (var i = 0; i < this.children.length; ++i) {
        var child = this.children[i], sz = child.chunkSize();
        if (at <= sz) {
          child.insertInner(at, lines, height);
          if (child.lines && child.lines.length > 50) {
            // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
            // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
            var remaining = child.lines.length % 25 + 25;
            for (var pos = remaining; pos < child.lines.length;) {
              var leaf = new LeafChunk(child.lines.slice(pos, pos += 25));
              child.height -= leaf.height;
              this.children.splice(++i, 0, leaf);
              leaf.parent = this;
            }
            child.lines = child.lines.slice(0, remaining);
            this.maybeSpill();
          }
          break
        }
        at -= sz;
      }
    },

    // When a node has grown, check whether it should be split.
    maybeSpill: function() {
      if (this.children.length <= 10) { return }
      var me = this;
      do {
        var spilled = me.children.splice(me.children.length - 5, 5);
        var sibling = new BranchChunk(spilled);
        if (!me.parent) { // Become the parent node
          var copy = new BranchChunk(me.children);
          copy.parent = me;
          me.children = [copy, sibling];
          me = copy;
       } else {
          me.size -= sibling.size;
          me.height -= sibling.height;
          var myIndex = indexOf(me.parent.children, me);
          me.parent.children.splice(myIndex + 1, 0, sibling);
        }
        sibling.parent = me.parent;
      } while (me.children.length > 10)
      me.parent.maybeSpill();
    },

    iterN: function(at, n, op) {
      for (var i = 0; i < this.children.length; ++i) {
        var child = this.children[i], sz = child.chunkSize();
        if (at < sz) {
          var used = Math.min(n, sz - at);
          if (child.iterN(at, used, op)) { return true }
          if ((n -= used) == 0) { break }
          at = 0;
        } else { at -= sz; }
      }
    }
  };

  // Line widgets are block elements displayed above or below a line.

  var LineWidget = function(doc, node, options) {
    if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
      { this[opt] = options[opt]; } } }
    this.doc = doc;
    this.node = node;
  };

  LineWidget.prototype.clear = function () {
    var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
    if (no == null || !ws) { return }
    for (var i = 0; i < ws.length; ++i) { if (ws[i] == this) { ws.splice(i--, 1); } }
    if (!ws.length) { line.widgets = null; }
    var height = widgetHeight(this);
    updateLineHeight(line, Math.max(0, line.height - height));
    if (cm) {
      runInOp(cm, function () {
        adjustScrollWhenAboveVisible(cm, line, -height);
        regLineChange(cm, no, "widget");
      });
      signalLater(cm, "lineWidgetCleared", cm, this, no);
    }
  };

  LineWidget.prototype.changed = function () {
      var this$1 = this;

    var oldH = this.height, cm = this.doc.cm, line = this.line;
    this.height = null;
    var diff = widgetHeight(this) - oldH;
    if (!diff) { return }
    if (!lineIsHidden(this.doc, line)) { updateLineHeight(line, line.height + diff); }
    if (cm) {
      runInOp(cm, function () {
        cm.curOp.forceUpdate = true;
        adjustScrollWhenAboveVisible(cm, line, diff);
        signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line));
      });
    }
  };
  eventMixin(LineWidget);

  function adjustScrollWhenAboveVisible(cm, line, diff) {
    if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
      { addToScrollTop(cm, diff); }
  }

  function addLineWidget(doc, handle, node, options) {
    var widget = new LineWidget(doc, node, options);
    var cm = doc.cm;
    if (cm && widget.noHScroll) { cm.display.alignWidgets = true; }
    changeLine(doc, handle, "widget", function (line) {
      var widgets = line.widgets || (line.widgets = []);
      if (widget.insertAt == null) { widgets.push(widget); }
      else { widgets.splice(Math.min(widgets.length, Math.max(0, widget.insertAt)), 0, widget); }
      widget.line = line;
      if (cm && !lineIsHidden(doc, line)) {
        var aboveVisible = heightAtLine(line) < doc.scrollTop;
        updateLineHeight(line, line.height + widgetHeight(widget));
        if (aboveVisible) { addToScrollTop(cm, widget.height); }
        cm.curOp.forceUpdate = true;
      }
      return true
    });
    if (cm) { signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle)); }
    return widget
  }

  // TEXTMARKERS

  // Created with markText and setBookmark methods. A TextMarker is a
  // handle that can be used to clear or find a marked position in the
  // document. Line objects hold arrays (markedSpans) containing
  // {from, to, marker} object pointing to such marker objects, and
  // indicating that such a marker is present on that line. Multiple
  // lines may point to the same marker when it spans across lines.
  // The spans will have null for their from/to properties when the
  // marker continues beyond the start/end of the line. Markers have
  // links back to the lines they currently touch.

  // Collapsed markers have unique ids, in order to be able to order
  // them, which is needed for uniquely determining an outer marker
  // when they overlap (they may nest, but not partially overlap).
  var nextMarkerId = 0;

  var TextMarker = function(doc, type) {
    this.lines = [];
    this.type = type;
    this.doc = doc;
    this.id = ++nextMarkerId;
  };

  // Clear the marker.
  TextMarker.prototype.clear = function () {
    if (this.explicitlyCleared) { return }
    var cm = this.doc.cm, withOp = cm && !cm.curOp;
    if (withOp) { startOperation(cm); }
    if (hasHandler(this, "clear")) {
      var found = this.find();
      if (found) { signalLater(this, "clear", found.from, found.to); }
    }
    var min = null, max = null;
    for (var i = 0; i < this.lines.length; ++i) {
      var line = this.lines[i];
      var span = getMarkedSpanFor(line.markedSpans, this);
      if (cm && !this.collapsed) { regLineChange(cm, lineNo(line), "text"); }
      else if (cm) {
        if (span.to != null) { max = lineNo(line); }
        if (span.from != null) { min = lineNo(line); }
      }
      line.markedSpans = removeMarkedSpan(line.markedSpans, span);
      if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) && cm)
        { updateLineHeight(line, textHeight(cm.display)); }
    }
    if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
      var visual = visualLine(this.lines[i$1]), len = lineLength(visual);
      if (len > cm.display.maxLineLength) {
        cm.display.maxLine = visual;
        cm.display.maxLineLength = len;
        cm.display.maxLineChanged = true;
      }
    } }

    if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1); }
    this.lines.length = 0;
    this.explicitlyCleared = true;
    if (this.atomic && this.doc.cantEdit) {
      this.doc.cantEdit = false;
      if (cm) { reCheckSelection(cm.doc); }
    }
    if (cm) { signalLater(cm, "markerCleared", cm, this, min, max); }
    if (withOp) { endOperation(cm); }
    if (this.parent) { this.parent.clear(); }
  };

  // Find the position of the marker in the document. Returns a {from,
  // to} object by default. Side can be passed to get a specific side
  // -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
  // Pos objects returned contain a line object, rather than a line
  // number (used to prevent looking up the same line twice).
  TextMarker.prototype.find = function (side, lineObj) {
    if (side == null && this.type == "bookmark") { side = 1; }
    var from, to;
    for (var i = 0; i < this.lines.length; ++i) {
      var line = this.lines[i];
      var span = getMarkedSpanFor(line.markedSpans, this);
      if (span.from != null) {
        from = Pos(lineObj ? line : lineNo(line), span.from);
        if (side == -1) { return from }
      }
      if (span.to != null) {
        to = Pos(lineObj ? line : lineNo(line), span.to);
        if (side == 1) { return to }
      }
    }
    return from && {from: from, to: to}
  };

  // Signals that the marker's widget changed, and surrounding layout
  // should be recomputed.
  TextMarker.prototype.changed = function () {
      var this$1 = this;

    var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
    if (!pos || !cm) { return }
    runInOp(cm, function () {
      var line = pos.line, lineN = lineNo(pos.line);
      var view = findViewForLine(cm, lineN);
      if (view) {
        clearLineMeasurementCacheFor(view);
        cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
      }
      cm.curOp.updateMaxLine = true;
      if (!lineIsHidden(widget.doc, line) && widget.height != null) {
        var oldHeight = widget.height;
        widget.height = null;
        var dHeight = widgetHeight(widget) - oldHeight;
        if (dHeight)
          { updateLineHeight(line, line.height + dHeight); }
      }
      signalLater(cm, "markerChanged", cm, this$1);
    });
  };

  TextMarker.prototype.attachLine = function (line) {
    if (!this.lines.length && this.doc.cm) {
      var op = this.doc.cm.curOp;
      if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
        { (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this); }
    }
    this.lines.push(line);
  };

  TextMarker.prototype.detachLine = function (line) {
    this.lines.splice(indexOf(this.lines, line), 1);
    if (!this.lines.length && this.doc.cm) {
      var op = this.doc.cm.curOp
      ;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
    }
  };
  eventMixin(TextMarker);

  // Create a marker, wire it up to the right lines, and
  function markText(doc, from, to, options, type) {
    // Shared markers (across linked documents) are handled separately
    // (markTextShared will call out to this again, once per
    // document).
    if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
    // Ensure we are in an operation.
    if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }

    var marker = new TextMarker(doc, type), diff = cmp(from, to);
    if (options) { copyObj(options, marker, false); }
    // Don't connect empty markers unless clearWhenEmpty is false
    if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
      { return marker }
    if (marker.replacedWith) {
      // Showing up as a widget implies collapsed (widget replaces text)
      marker.collapsed = true;
      marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget");
      if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true"); }
      if (options.insertLeft) { marker.widgetNode.insertLeft = true; }
    }
    if (marker.collapsed) {
      if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
          from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
        { throw new Error("Inserting collapsed marker partially overlapping an existing one") }
      seeCollapsedSpans();
    }

    if (marker.addToHistory)
      { addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN); }

    var curLine = from.line, cm = doc.cm, updateMaxLine;
    doc.iter(curLine, to.line + 1, function (line) {
      if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
        { updateMaxLine = true; }
      if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0); }
      addMarkedSpan(line, new MarkedSpan(marker,
                                         curLine == from.line ? from.ch : null,
                                         curLine == to.line ? to.ch : null), doc.cm && doc.cm.curOp);
      ++curLine;
    });
    // lineIsHidden depends on the presence of the spans, so needs a second pass
    if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
      if (lineIsHidden(doc, line)) { updateLineHeight(line, 0); }
    }); }

    if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }); }

    if (marker.readOnly) {
      seeReadOnlySpans();
      if (doc.history.done.length || doc.history.undone.length)
        { doc.clearHistory(); }
    }
    if (marker.collapsed) {
      marker.id = ++nextMarkerId;
      marker.atomic = true;
    }
    if (cm) {
      // Sync editor state
      if (updateMaxLine) { cm.curOp.updateMaxLine = true; }
      if (marker.collapsed)
        { regChange(cm, from.line, to.line + 1); }
      else if (marker.className || marker.startStyle || marker.endStyle || marker.css ||
               marker.attributes || marker.title)
        { for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text"); } }
      if (marker.atomic) { reCheckSelection(cm.doc); }
      signalLater(cm, "markerAdded", cm, marker);
    }
    return marker
  }

  // SHARED TEXTMARKERS

  // A shared marker spans multiple linked documents. It is
  // implemented as a meta-marker-object controlling multiple normal
  // markers.
  var SharedTextMarker = function(markers, primary) {
    this.markers = markers;
    this.primary = primary;
    for (var i = 0; i < markers.length; ++i)
      { markers[i].parent = this; }
  };

  SharedTextMarker.prototype.clear = function () {
    if (this.explicitlyCleared) { return }
    this.explicitlyCleared = true;
    for (var i = 0; i < this.markers.length; ++i)
      { this.markers[i].clear(); }
    signalLater(this, "clear");
  };

  SharedTextMarker.prototype.find = function (side, lineObj) {
    return this.primary.find(side, lineObj)
  };
  eventMixin(SharedTextMarker);

  function markTextShared(doc, from, to, options, type) {
    options = copyObj(options);
    options.shared = false;
    var markers = [markText(doc, from, to, options, type)], primary = markers[0];
    var widget = options.widgetNode;
    linkedDocs(doc, function (doc) {
      if (widget) { options.widgetNode = widget.cloneNode(true); }
      markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
      for (var i = 0; i < doc.linked.length; ++i)
        { if (doc.linked[i].isParent) { return } }
      primary = lst(markers);
    });
    return new SharedTextMarker(markers, primary)
  }

  function findSharedMarkers(doc) {
    return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
  }

  function copySharedMarkers(doc, markers) {
    for (var i = 0; i < markers.length; i++) {
      var marker = markers[i], pos = marker.find();
      var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
      if (cmp(mFrom, mTo)) {
        var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
        marker.markers.push(subMark);
        subMark.parent = marker;
      }
    }
  }

  function detachSharedMarkers(markers) {
    var loop = function ( i ) {
      var marker = markers[i], linked = [marker.primary.doc];
      linkedDocs(marker.primary.doc, function (d) { return linked.push(d); });
      for (var j = 0; j < marker.markers.length; j++) {
        var subMarker = marker.markers[j];
        if (indexOf(linked, subMarker.doc) == -1) {
          subMarker.parent = null;
          marker.markers.splice(j--, 1);
        }
      }
    };

    for (var i = 0; i < markers.length; i++) loop( i );
  }

  var nextDocId = 0;
  var Doc = function(text, mode, firstLine, lineSep, direction) {
    if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
    if (firstLine == null) { firstLine = 0; }

    BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
    this.first = firstLine;
    this.scrollTop = this.scrollLeft = 0;
    this.cantEdit = false;
    this.cleanGeneration = 1;
    this.modeFrontier = this.highlightFrontier = firstLine;
    var start = Pos(firstLine, 0);
    this.sel = simpleSelection(start);
    this.history = new History(null);
    this.id = ++nextDocId;
    this.modeOption = mode;
    this.lineSep = lineSep;
    this.direction = (direction == "rtl") ? "rtl" : "ltr";
    this.extend = false;

    if (typeof text == "string") { text = this.splitLines(text); }
    updateDoc(this, {from: start, to: start, text: text});
    setSelection(this, simpleSelection(start), sel_dontScroll);
  };

  Doc.prototype = createObj(BranchChunk.prototype, {
    constructor: Doc,
    // Iterate over the document. Supports two forms -- with only one
    // argument, it calls that for each line in the document. With
    // three, it iterates over the range given by the first two (with
    // the second being non-inclusive).
    iter: function(from, to, op) {
      if (op) { this.iterN(from - this.first, to - from, op); }
      else { this.iterN(this.first, this.first + this.size, from); }
    },

    // Non-public interface for adding and removing lines.
    insert: function(at, lines) {
      var height = 0;
      for (var i = 0; i < lines.length; ++i) { height += lines[i].height; }
      this.insertInner(at - this.first, lines, height);
    },
    remove: function(at, n) { this.removeInner(at - this.first, n); },

    // From here, the methods are part of the public interface. Most
    // are also available from CodeMirror (editor) instances.

    getValue: function(lineSep) {
      var lines = getLines(this, this.first, this.first + this.size);
      if (lineSep === false) { return lines }
      return lines.join(lineSep || this.lineSeparator())
    },
    setValue: docMethodOp(function(code) {
      var top = Pos(this.first, 0), last = this.first + this.size - 1;
      makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
                        text: this.splitLines(code), origin: "setValue", full: true}, true);
      if (this.cm) { scrollToCoords(this.cm, 0, 0); }
      setSelection(this, simpleSelection(top), sel_dontScroll);
    }),
    replaceRange: function(code, from, to, origin) {
      from = clipPos(this, from);
      to = to ? clipPos(this, to) : from;
      replaceRange(this, code, from, to, origin);
    },
    getRange: function(from, to, lineSep) {
      var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
      if (lineSep === false) { return lines }
      if (lineSep === '') { return lines.join('') }
      return lines.join(lineSep || this.lineSeparator())
    },

    getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},

    getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
    getLineNumber: function(line) {return lineNo(line)},

    getLineHandleVisualStart: function(line) {
      if (typeof line == "number") { line = getLine(this, line); }
      return visualLine(line)
    },

    lineCount: function() {return this.size},
    firstLine: function() {return this.first},
    lastLine: function() {return this.first + this.size - 1},

    clipPos: function(pos) {return clipPos(this, pos)},

    getCursor: function(start) {
      var range = this.sel.primary(), pos;
      if (start == null || start == "head") { pos = range.head; }
      else if (start == "anchor") { pos = range.anchor; }
      else if (start == "end" || start == "to" || start === false) { pos = range.to(); }
      else { pos = range.from(); }
      return pos
    },
    listSelections: function() { return this.sel.ranges },
    somethingSelected: function() {return this.sel.somethingSelected()},

    setCursor: docMethodOp(function(line, ch, options) {
      setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
    }),
    setSelection: docMethodOp(function(anchor, head, options) {
      setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
    }),
    extendSelection: docMethodOp(function(head, other, options) {
      extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
    }),
    extendSelections: docMethodOp(function(heads, options) {
      extendSelections(this, clipPosArray(this, heads), options);
    }),
    extendSelectionsBy: docMethodOp(function(f, options) {
      var heads = map(this.sel.ranges, f);
      extendSelections(this, clipPosArray(this, heads), options);
    }),
    setSelections: docMethodOp(function(ranges, primary, options) {
      if (!ranges.length) { return }
      var out = [];
      for (var i = 0; i < ranges.length; i++)
        { out[i] = new Range(clipPos(this, ranges[i].anchor),
                           clipPos(this, ranges[i].head || ranges[i].anchor)); }
      if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex); }
      setSelection(this, normalizeSelection(this.cm, out, primary), options);
    }),
    addSelection: docMethodOp(function(anchor, head, options) {
      var ranges = this.sel.ranges.slice(0);
      ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
      setSelection(this, normalizeSelection(this.cm, ranges, ranges.length - 1), options);
    }),

    getSelection: function(lineSep) {
      var ranges = this.sel.ranges, lines;
      for (var i = 0; i < ranges.length; i++) {
        var sel = getBetween(this, ranges[i].from(), ranges[i].to());
        lines = lines ? lines.concat(sel) : sel;
      }
      if (lineSep === false) { return lines }
      else { return lines.join(lineSep || this.lineSeparator()) }
    },
    getSelections: function(lineSep) {
      var parts = [], ranges = this.sel.ranges;
      for (var i = 0; i < ranges.length; i++) {
        var sel = getBetween(this, ranges[i].from(), ranges[i].to());
        if (lineSep !== false) { sel = sel.join(lineSep || this.lineSeparator()); }
        parts[i] = sel;
      }
      return parts
    },
    replaceSelection: function(code, collapse, origin) {
      var dup = [];
      for (var i = 0; i < this.sel.ranges.length; i++)
        { dup[i] = code; }
      this.replaceSelections(dup, collapse, origin || "+input");
    },
    replaceSelections: docMethodOp(function(code, collapse, origin) {
      var changes = [], sel = this.sel;
      for (var i = 0; i < sel.ranges.length; i++) {
        var range = sel.ranges[i];
        changes[i] = {from: range.from(), to: range.to(), text: this.splitLines(code[i]), origin: origin};
      }
      var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
      for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
        { makeChange(this, changes[i$1]); }
      if (newSel) { setSelectionReplaceHistory(this, newSel); }
      else if (this.cm) { ensureCursorVisible(this.cm); }
    }),
    undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
    redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
    undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
    redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),

    setExtending: function(val) {this.extend = val;},
    getExtending: function() {return this.extend},

    historySize: function() {
      var hist = this.history, done = 0, undone = 0;
      for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done; } }
      for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone; } }
      return {undo: done, redo: undone}
    },
    clearHistory: function() {
      var this$1 = this;

      this.history = new History(this.history);
      linkedDocs(this, function (doc) { return doc.history = this$1.history; }, true);
    },

    markClean: function() {
      this.cleanGeneration = this.changeGeneration(true);
    },
    changeGeneration: function(forceSplit) {
      if (forceSplit)
        { this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null; }
      return this.history.generation
    },
    isClean: function (gen) {
      return this.history.generation == (gen || this.cleanGeneration)
    },

    getHistory: function() {
      return {done: copyHistoryArray(this.history.done),
              undone: copyHistoryArray(this.history.undone)}
    },
    setHistory: function(histData) {
      var hist = this.history = new History(this.history);
      hist.done = copyHistoryArray(histData.done.slice(0), null, true);
      hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
    },

    setGutterMarker: docMethodOp(function(line, gutterID, value) {
      return changeLine(this, line, "gutter", function (line) {
        var markers = line.gutterMarkers || (line.gutterMarkers = {});
        markers[gutterID] = value;
        if (!value && isEmpty(markers)) { line.gutterMarkers = null; }
        return true
      })
    }),

    clearGutter: docMethodOp(function(gutterID) {
      var this$1 = this;

      this.iter(function (line) {
        if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
          changeLine(this$1, line, "gutter", function () {
            line.gutterMarkers[gutterID] = null;
            if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null; }
            return true
          });
        }
      });
    }),

    lineInfo: function(line) {
      var n;
      if (typeof line == "number") {
        if (!isLine(this, line)) { return null }
        n = line;
        line = getLine(this, line);
        if (!line) { return null }
      } else {
        n = lineNo(line);
        if (n == null) { return null }
      }
      return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
              textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
              widgets: line.widgets}
    },

    addLineClass: docMethodOp(function(handle, where, cls) {
      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
        var prop = where == "text" ? "textClass"
                 : where == "background" ? "bgClass"
                 : where == "gutter" ? "gutterClass" : "wrapClass";
        if (!line[prop]) { line[prop] = cls; }
        else if (classTest(cls).test(line[prop])) { return false }
        else { line[prop] += " " + cls; }
        return true
      })
    }),
    removeLineClass: docMethodOp(function(handle, where, cls) {
      return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
        var prop = where == "text" ? "textClass"
                 : where == "background" ? "bgClass"
                 : where == "gutter" ? "gutterClass" : "wrapClass";
        var cur = line[prop];
        if (!cur) { return false }
        else if (cls == null) { line[prop] = null; }
        else {
          var found = cur.match(classTest(cls));
          if (!found) { return false }
          var end = found.index + found[0].length;
          line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
        }
        return true
      })
    }),

    addLineWidget: docMethodOp(function(handle, node, options) {
      return addLineWidget(this, handle, node, options)
    }),
    removeLineWidget: function(widget) { widget.clear(); },

    markText: function(from, to, options) {
      return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
    },
    setBookmark: function(pos, options) {
      var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
                      insertLeft: options && options.insertLeft,
                      clearWhenEmpty: false, shared: options && options.shared,
                      handleMouseEvents: options && options.handleMouseEvents};
      pos = clipPos(this, pos);
      return markText(this, pos, pos, realOpts, "bookmark")
    },
    findMarksAt: function(pos) {
      pos = clipPos(this, pos);
      var markers = [], spans = getLine(this, pos.line).markedSpans;
      if (spans) { for (var i = 0; i < spans.length; ++i) {
        var span = spans[i];
        if ((span.from == null || span.from <= pos.ch) &&
            (span.to == null || span.to >= pos.ch))
          { markers.push(span.marker.parent || span.marker); }
      } }
      return markers
    },
    findMarks: function(from, to, filter) {
      from = clipPos(this, from); to = clipPos(this, to);
      var found = [], lineNo = from.line;
      this.iter(from.line, to.line + 1, function (line) {
        var spans = line.markedSpans;
        if (spans) { for (var i = 0; i < spans.length; i++) {
          var span = spans[i];
          if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
                span.from == null && lineNo != from.line ||
                span.from != null && lineNo == to.line && span.from >= to.ch) &&
              (!filter || filter(span.marker)))
            { found.push(span.marker.parent || span.marker); }
        } }
        ++lineNo;
      });
      return found
    },
    getAllMarks: function() {
      var markers = [];
      this.iter(function (line) {
        var sps = line.markedSpans;
        if (sps) { for (var i = 0; i < sps.length; ++i)
          { if (sps[i].from != null) { markers.push(sps[i].marker); } } }
      });
      return markers
    },

    posFromIndex: function(off) {
      var ch, lineNo = this.first, sepSize = this.lineSeparator().length;
      this.iter(function (line) {
        var sz = line.text.length + sepSize;
        if (sz > off) { ch = off; return true }
        off -= sz;
        ++lineNo;
      });
      return clipPos(this, Pos(lineNo, ch))
    },
    indexFromPos: function (coords) {
      coords = clipPos(this, coords);
      var index = coords.ch;
      if (coords.line < this.first || coords.ch < 0) { return 0 }
      var sepSize = this.lineSeparator().length;
      this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
        index += line.text.length + sepSize;
      });
      return index
    },

    copy: function(copyHistory) {
      var doc = new Doc(getLines(this, this.first, this.first + this.size),
                        this.modeOption, this.first, this.lineSep, this.direction);
      doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
      doc.sel = this.sel;
      doc.extend = false;
      if (copyHistory) {
        doc.history.undoDepth = this.history.undoDepth;
        doc.setHistory(this.getHistory());
      }
      return doc
    },

    linkedDoc: function(options) {
      if (!options) { options = {}; }
      var from = this.first, to = this.first + this.size;
      if (options.from != null && options.from > from) { from = options.from; }
      if (options.to != null && options.to < to) { to = options.to; }
      var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction);
      if (options.sharedHist) { copy.history = this.history
      ; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
      copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
      copySharedMarkers(copy, findSharedMarkers(this));
      return copy
    },
    unlinkDoc: function(other) {
      if (other instanceof CodeMirror) { other = other.doc; }
      if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
        var link = this.linked[i];
        if (link.doc != other) { continue }
        this.linked.splice(i, 1);
        other.unlinkDoc(this);
        detachSharedMarkers(findSharedMarkers(this));
        break
      } }
      // If the histories were shared, split them again
      if (other.history == this.history) {
        var splitIds = [other.id];
        linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true);
        other.history = new History(null);
        other.history.done = copyHistoryArray(this.history.done, splitIds);
        other.history.undone = copyHistoryArray(this.history.undone, splitIds);
      }
    },
    iterLinkedDocs: function(f) {linkedDocs(this, f);},

    getMode: function() {return this.mode},
    getEditor: function() {return this.cm},

    splitLines: function(str) {
      if (this.lineSep) { return str.split(this.lineSep) }
      return splitLinesAuto(str)
    },
    lineSeparator: function() { return this.lineSep || "\n" },

    setDirection: docMethodOp(function (dir) {
      if (dir != "rtl") { dir = "ltr"; }
      if (dir == this.direction) { return }
      this.direction = dir;
      this.iter(function (line) { return line.order = null; });
      if (this.cm) { directionChanged(this.cm); }
    })
  });

  // Public alias.
  Doc.prototype.eachLine = Doc.prototype.iter;

  // Kludge to work around strange IE behavior where it'll sometimes
  // re-fire a series of drag-related events right after the drop (#1551)
  var lastDrop = 0;

  function onDrop(e) {
    var cm = this;
    clearDragCursor(cm);
    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
      { return }
    e_preventDefault(e);
    if (ie) { lastDrop = +new Date; }
    var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
    if (!pos || cm.isReadOnly()) { return }
    // Might be a file drop, in which case we simply extract the text
    // and insert it.
    if (files && files.length && window.FileReader && window.File) {
      var n = files.length, text = Array(n), read = 0;
      var markAsReadAndPasteIfAllFilesAreRead = function () {
        if (++read == n) {
          operation(cm, function () {
            pos = clipPos(cm.doc, pos);
            var change = {from: pos, to: pos,
                          text: cm.doc.splitLines(
                              text.filter(function (t) { return t != null; }).join(cm.doc.lineSeparator())),
                          origin: "paste"};
            makeChange(cm.doc, change);
            setSelectionReplaceHistory(cm.doc, simpleSelection(clipPos(cm.doc, pos), clipPos(cm.doc, changeEnd(change))));
          })();
        }
      };
      var readTextFromFile = function (file, i) {
        if (cm.options.allowDropFileTypes &&
            indexOf(cm.options.allowDropFileTypes, file.type) == -1) {
          markAsReadAndPasteIfAllFilesAreRead();
          return
        }
        var reader = new FileReader;
        reader.onerror = function () { return markAsReadAndPasteIfAllFilesAreRead(); };
        reader.onload = function () {
          var content = reader.result;
          if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) {
            markAsReadAndPasteIfAllFilesAreRead();
            return
          }
          text[i] = content;
          markAsReadAndPasteIfAllFilesAreRead();
        };
        reader.readAsText(file);
      };
      for (var i = 0; i < files.length; i++) { readTextFromFile(files[i], i); }
    } else { // Normal drop
      // Don't do a replace if the drop happened inside of the selected text.
      if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
        cm.state.draggingText(e);
        // Ensure the editor is re-focused
        setTimeout(function () { return cm.display.input.focus(); }, 20);
        return
      }
      try {
        var text$1 = e.dataTransfer.getData("Text");
        if (text$1) {
          var selected;
          if (cm.state.draggingText && !cm.state.draggingText.copy)
            { selected = cm.listSelections(); }
          setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
          if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
            { replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag"); } }
          cm.replaceSelection(text$1, "around", "paste");
          cm.display.input.focus();
        }
      }
      catch(e$1){}
    }
  }

  function onDragStart(cm, e) {
    if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
    if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }

    e.dataTransfer.setData("Text", cm.getSelection());
    e.dataTransfer.effectAllowed = "copyMove";

    // Use dummy image instead of default browsers image.
    // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
    if (e.dataTransfer.setDragImage && !safari) {
      var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
      img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
      if (presto) {
        img.width = img.height = 1;
        cm.display.wrapper.appendChild(img);
        // Force a relayout, or Opera won't use our image for some obscure reason
        img._top = img.offsetTop;
      }
      e.dataTransfer.setDragImage(img, 0, 0);
      if (presto) { img.parentNode.removeChild(img); }
    }
  }

  function onDragOver(cm, e) {
    var pos = posFromMouse(cm, e);
    if (!pos) { return }
    var frag = document.createDocumentFragment();
    drawSelectionCursor(cm, pos, frag);
    if (!cm.display.dragCursor) {
      cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
      cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
    }
    removeChildrenAndAdd(cm.display.dragCursor, frag);
  }

  function clearDragCursor(cm) {
    if (cm.display.dragCursor) {
      cm.display.lineSpace.removeChild(cm.display.dragCursor);
      cm.display.dragCursor = null;
    }
  }

  // These must be handled carefully, because naively registering a
  // handler for each editor will cause the editors to never be
  // garbage collected.

  function forEachCodeMirror(f) {
    if (!document.getElementsByClassName) { return }
    var byClass = document.getElementsByClassName("CodeMirror"), editors = [];
    for (var i = 0; i < byClass.length; i++) {
      var cm = byClass[i].CodeMirror;
      if (cm) { editors.push(cm); }
    }
    if (editors.length) { editors[0].operation(function () {
      for (var i = 0; i < editors.length; i++) { f(editors[i]); }
    }); }
  }

  var globalsRegistered = false;
  function ensureGlobalHandlers() {
    if (globalsRegistered) { return }
    registerGlobalHandlers();
    globalsRegistered = true;
  }
  function registerGlobalHandlers() {
    // When the window resizes, we need to refresh active editors.
    var resizeTimer;
    on(window, "resize", function () {
      if (resizeTimer == null) { resizeTimer = setTimeout(function () {
        resizeTimer = null;
        forEachCodeMirror(onResize);
      }, 100); }
    });
    // When the window loses focus, we want to show the editor as blurred
    on(window, "blur", function () { return forEachCodeMirror(onBlur); });
  }
  // Called when the window resizes
  function onResize(cm) {
    var d = cm.display;
    // Might be a text scaling operation, clear size caches.
    d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
    d.scrollbarsClipped = false;
    cm.setSize();
  }

  var keyNames = {
    3: "Pause", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
    19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
    36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
    46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
    106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 145: "ScrollLock",
    173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
    221: "]", 222: "'", 224: "Mod", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
    63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
  };

  // Number keys
  for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i); }
  // Alphabetic keys
  for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1); }
  // Function keys
  for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2; }

  var keyMap = {};

  keyMap.basic = {
    "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
    "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
    "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
    "Tab": "defaultTab", "Shift-Tab": "indentAuto",
    "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
    "Esc": "singleSelection"
  };
  // Note that the save and find-related commands aren't defined by
  // default. User code or addons can define them. Unknown commands
  // are simply ignored.
  keyMap.pcDefault = {
    "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
    "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
    "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
    "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
    "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
    "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
    "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
    "fallthrough": "basic"
  };
  // Very basic readline/emacs-style bindings, which are standard on Mac.
  keyMap.emacsy = {
    "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
    "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd", "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp",
    "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine",
    "Ctrl-T": "transposeChars", "Ctrl-O": "openLine"
  };
  keyMap.macDefault = {
    "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
    "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
    "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
    "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
    "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
    "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
    "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
    "fallthrough": ["basic", "emacsy"]
  };
  keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;

  // KEYMAP DISPATCH

  function normalizeKeyName(name) {
    var parts = name.split(/-(?!$)/);
    name = parts[parts.length - 1];
    var alt, ctrl, shift, cmd;
    for (var i = 0; i < parts.length - 1; i++) {
      var mod = parts[i];
      if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true; }
      else if (/^a(lt)?$/i.test(mod)) { alt = true; }
      else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true; }
      else if (/^s(hift)?$/i.test(mod)) { shift = true; }
      else { throw new Error("Unrecognized modifier name: " + mod) }
    }
    if (alt) { name = "Alt-" + name; }
    if (ctrl) { name = "Ctrl-" + name; }
    if (cmd) { name = "Cmd-" + name; }
    if (shift) { name = "Shift-" + name; }
    return name
  }

  // This is a kludge to keep keymaps mostly working as raw objects
  // (backwards compatibility) while at the same time support features
  // like normalization and multi-stroke key bindings. It compiles a
  // new normalized keymap, and then updates the old object to reflect
  // this.
  function normalizeKeyMap(keymap) {
    var copy = {};
    for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
      var value = keymap[keyname];
      if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
      if (value == "...") { delete keymap[keyname]; continue }

      var keys = map(keyname.split(" "), normalizeKeyName);
      for (var i = 0; i < keys.length; i++) {
        var val = (void 0), name = (void 0);
        if (i == keys.length - 1) {
          name = keys.join(" ");
          val = value;
        } else {
          name = keys.slice(0, i + 1).join(" ");
          val = "...";
        }
        var prev = copy[name];
        if (!prev) { copy[name] = val; }
        else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
      }
      delete keymap[keyname];
    } }
    for (var prop in copy) { keymap[prop] = copy[prop]; }
    return keymap
  }

  function lookupKey(key, map, handle, context) {
    map = getKeyMap(map);
    var found = map.call ? map.call(key, context) : map[key];
    if (found === false) { return "nothing" }
    if (found === "...") { return "multi" }
    if (found != null && handle(found)) { return "handled" }

    if (map.fallthrough) {
      if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
        { return lookupKey(key, map.fallthrough, handle, context) }
      for (var i = 0; i < map.fallthrough.length; i++) {
        var result = lookupKey(key, map.fallthrough[i], handle, context);
        if (result) { return result }
      }
    }
  }

  // Modifier key presses don't count as 'real' key presses for the
  // purpose of keymap fallthrough.
  function isModifierKey(value) {
    var name = typeof value == "string" ? value : keyNames[value.keyCode];
    return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
  }

  function addModifierNames(name, event, noShift) {
    var base = name;
    if (event.altKey && base != "Alt") { name = "Alt-" + name; }
    if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name; }
    if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Mod") { name = "Cmd-" + name; }
    if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name; }
    return name
  }

  // Look up the name of a key as indicated by an event object.
  function keyName(event, noShift) {
    if (presto && event.keyCode == 34 && event["char"]) { return false }
    var name = keyNames[event.keyCode];
    if (name == null || event.altGraphKey) { return false }
    // Ctrl-ScrollLock has keyCode 3, same as Ctrl-Pause,
    // so we'll use event.code when available (Chrome 48+, FF 38+, Safari 10.1+)
    if (event.keyCode == 3 && event.code) { name = event.code; }
    return addModifierNames(name, event, noShift)
  }

  function getKeyMap(val) {
    return typeof val == "string" ? keyMap[val] : val
  }

  // Helper for deleting text near the selection(s), used to implement
  // backspace, delete, and similar functionality.
  function deleteNearSelection(cm, compute) {
    var ranges = cm.doc.sel.ranges, kill = [];
    // Build up a set of ranges to kill first, merging overlapping
    // ranges.
    for (var i = 0; i < ranges.length; i++) {
      var toKill = compute(ranges[i]);
      while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
        var replaced = kill.pop();
        if (cmp(replaced.from, toKill.from) < 0) {
          toKill.from = replaced.from;
          break
        }
      }
      kill.push(toKill);
    }
    // Next, remove those actual ranges.
    runInOp(cm, function () {
      for (var i = kill.length - 1; i >= 0; i--)
        { replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete"); }
      ensureCursorVisible(cm);
    });
  }

  function moveCharLogically(line, ch, dir) {
    var target = skipExtendingChars(line.text, ch + dir, dir);
    return target < 0 || target > line.text.length ? null : target
  }

  function moveLogically(line, start, dir) {
    var ch = moveCharLogically(line, start.ch, dir);
    return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
  }

  function endOfLine(visually, cm, lineObj, lineNo, dir) {
    if (visually) {
      if (cm.doc.direction == "rtl") { dir = -dir; }
      var order = getOrder(lineObj, cm.doc.direction);
      if (order) {
        var part = dir < 0 ? lst(order) : order[0];
        var moveInStorageOrder = (dir < 0) == (part.level == 1);
        var sticky = moveInStorageOrder ? "after" : "before";
        var ch;
        // With a wrapped rtl chunk (possibly spanning multiple bidi parts),
        // it could be that the last bidi part is not on the last visual line,
        // since visual lines contain content order-consecutive chunks.
        // Thus, in rtl, we are looking for the first (content-order) character
        // in the rtl chunk that is on the last line (that is, the same line
        // as the last (content-order) character).
        if (part.level > 0 || cm.doc.direction == "rtl") {
          var prep = prepareMeasureForLine(cm, lineObj);
          ch = dir < 0 ? lineObj.text.length - 1 : 0;
          var targetTop = measureCharPrepared(cm, prep, ch).top;
          ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch);
          if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1); }
        } else { ch = dir < 0 ? part.to : part.from; }
        return new Pos(lineNo, ch, sticky)
      }
    }
    return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
  }

  function moveVisually(cm, line, start, dir) {
    var bidi = getOrder(line, cm.doc.direction);
    if (!bidi) { return moveLogically(line, start, dir) }
    if (start.ch >= line.text.length) {
      start.ch = line.text.length;
      start.sticky = "before";
    } else if (start.ch <= 0) {
      start.ch = 0;
      start.sticky = "after";
    }
    var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos];
    if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
      // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
      // nothing interesting happens.
      return moveLogically(line, start, dir)
    }

    var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); };
    var prep;
    var getWrappedLineExtent = function (ch) {
      if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
      prep = prep || prepareMeasureForLine(cm, line);
      return wrappedLineExtentChar(cm, line, prep, ch)
    };
    var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch);

    if (cm.doc.direction == "rtl" || part.level == 1) {
      var moveInStorageOrder = (part.level == 1) == (dir < 0);
      var ch = mv(start, moveInStorageOrder ? 1 : -1);
      if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
        // Case 2: We move within an rtl part or in an rtl editor on the same visual line
        var sticky = moveInStorageOrder ? "before" : "after";
        return new Pos(start.line, ch, sticky)
      }
    }

    // Case 3: Could not move within this bidi part in this visual line, so leave
    // the current bidi part

    var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
      var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
        ? new Pos(start.line, mv(ch, 1), "before")
        : new Pos(start.line, ch, "after"); };

      for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
        var part = bidi[partPos];
        var moveInStorageOrder = (dir > 0) == (part.level != 1);
        var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1);
        if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
        ch = moveInStorageOrder ? part.from : mv(part.to, -1);
        if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }
      }
    };

    // Case 3a: Look for other bidi parts on the same visual line
    var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent);
    if (res) { return res }

    // Case 3b: Look for other bidi parts on the next visual line
    var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1);
    if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
      res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh));
      if (res) { return res }
    }

    // Case 4: Nowhere to move
    return null
  }

  // Commands are parameter-less actions that can be performed on an
  // editor, mostly used for keybindings.
  var commands = {
    selectAll: selectAll,
    singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
    killLine: function (cm) { return deleteNearSelection(cm, function (range) {
      if (range.empty()) {
        var len = getLine(cm.doc, range.head.line).text.length;
        if (range.head.ch == len && range.head.line < cm.lastLine())
          { return {from: range.head, to: Pos(range.head.line + 1, 0)} }
        else
          { return {from: range.head, to: Pos(range.head.line, len)} }
      } else {
        return {from: range.from(), to: range.to()}
      }
    }); },
    deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
      from: Pos(range.from().line, 0),
      to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
    }); }); },
    delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
      from: Pos(range.from().line, 0), to: range.from()
    }); }); },
    delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
      var top = cm.charCoords(range.head, "div").top + 5;
      var leftPos = cm.coordsChar({left: 0, top: top}, "div");
      return {from: leftPos, to: range.from()}
    }); },
    delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
      var top = cm.charCoords(range.head, "div").top + 5;
      var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
      return {from: range.from(), to: rightPos }
    }); },
    undo: function (cm) { return cm.undo(); },
    redo: function (cm) { return cm.redo(); },
    undoSelection: function (cm) { return cm.undoSelection(); },
    redoSelection: function (cm) { return cm.redoSelection(); },
    goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
    goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
    goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
      {origin: "+move", bias: 1}
    ); },
    goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
      {origin: "+move", bias: 1}
    ); },
    goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
      {origin: "+move", bias: -1}
    ); },
    goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
      var top = cm.cursorCoords(range.head, "div").top + 5;
      return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
    }, sel_move); },
    goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
      var top = cm.cursorCoords(range.head, "div").top + 5;
      return cm.coordsChar({left: 0, top: top}, "div")
    }, sel_move); },
    goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
      var top = cm.cursorCoords(range.head, "div").top + 5;
      var pos = cm.coordsChar({left: 0, top: top}, "div");
      if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
      return pos
    }, sel_move); },
    goLineUp: function (cm) { return cm.moveV(-1, "line"); },
    goLineDown: function (cm) { return cm.moveV(1, "line"); },
    goPageUp: function (cm) { return cm.moveV(-1, "page"); },
    goPageDown: function (cm) { return cm.moveV(1, "page"); },
    goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
    goCharRight: function (cm) { return cm.moveH(1, "char"); },
    goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
    goColumnRight: function (cm) { return cm.moveH(1, "column"); },
    goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
    goGroupRight: function (cm) { return cm.moveH(1, "group"); },
    goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
    goWordRight: function (cm) { return cm.moveH(1, "word"); },
    delCharBefore: function (cm) { return cm.deleteH(-1, "codepoint"); },
    delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
    delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
    delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
    delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
    delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
    indentAuto: function (cm) { return cm.indentSelection("smart"); },
    indentMore: function (cm) { return cm.indentSelection("add"); },
    indentLess: function (cm) { return cm.indentSelection("subtract"); },
    insertTab: function (cm) { return cm.replaceSelection("\t"); },
    insertSoftTab: function (cm) {
      var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize;
      for (var i = 0; i < ranges.length; i++) {
        var pos = ranges[i].from();
        var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
        spaces.push(spaceStr(tabSize - col % tabSize));
      }
      cm.replaceSelections(spaces);
    },
    defaultTab: function (cm) {
      if (cm.somethingSelected()) { cm.indentSelection("add"); }
      else { cm.execCommand("insertTab"); }
    },
    // Swap the two chars left and right of each selection's head.
    // Move cursor behind the two swapped characters afterwards.
    //
    // Doesn't consider line feeds a character.
    // Doesn't scan more than one line above to find a character.
    // Doesn't do anything on an empty line.
    // Doesn't do anything with non-empty selections.
    transposeChars: function (cm) { return runInOp(cm, function () {
      var ranges = cm.listSelections(), newSel = [];
      for (var i = 0; i < ranges.length; i++) {
        if (!ranges[i].empty()) { continue }
        var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
        if (line) {
          if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1); }
          if (cur.ch > 0) {
            cur = new Pos(cur.line, cur.ch + 1);
            cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
                            Pos(cur.line, cur.ch - 2), cur, "+transpose");
          } else if (cur.line > cm.doc.first) {
            var prev = getLine(cm.doc, cur.line - 1).text;
            if (prev) {
              cur = new Pos(cur.line, 1);
              cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
                              prev.charAt(prev.length - 1),
                              Pos(cur.line - 1, prev.length - 1), cur, "+transpose");
            }
          }
        }
        newSel.push(new Range(cur, cur));
      }
      cm.setSelections(newSel);
    }); },
    newlineAndIndent: function (cm) { return runInOp(cm, function () {
      var sels = cm.listSelections();
      for (var i = sels.length - 1; i >= 0; i--)
        { cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input"); }
      sels = cm.listSelections();
      for (var i$1 = 0; i$1 < sels.length; i$1++)
        { cm.indentLine(sels[i$1].from().line, null, true); }
      ensureCursorVisible(cm);
    }); },
    openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
    toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }
  };


  function lineStart(cm, lineN) {
    var line = getLine(cm.doc, lineN);
    var visual = visualLine(line);
    if (visual != line) { lineN = lineNo(visual); }
    return endOfLine(true, cm, visual, lineN, 1)
  }
  function lineEnd(cm, lineN) {
    var line = getLine(cm.doc, lineN);
    var visual = visualLineEnd(line);
    if (visual != line) { lineN = lineNo(visual); }
    return endOfLine(true, cm, line, lineN, -1)
  }
  function lineStartSmart(cm, pos) {
    var start = lineStart(cm, pos.line);
    var line = getLine(cm.doc, start.line);
    var order = getOrder(line, cm.doc.direction);
    if (!order || order[0].level == 0) {
      var firstNonWS = Math.max(start.ch, line.text.search(/\S/));
      var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch;
      return Pos(start.line, inWS ? 0 : firstNonWS, start.sticky)
    }
    return start
  }

  // Run a handler that was bound to a key.
  function doHandleBinding(cm, bound, dropShift) {
    if (typeof bound == "string") {
      bound = commands[bound];
      if (!bound) { return false }
    }
    // Ensure previous input has been read, so that the handler sees a
    // consistent view of the document
    cm.display.input.ensurePolled();
    var prevShift = cm.display.shift, done = false;
    try {
      if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
      if (dropShift) { cm.display.shift = false; }
      done = bound(cm) != Pass;
    } finally {
      cm.display.shift = prevShift;
      cm.state.suppressEdits = false;
    }
    return done
  }

  function lookupKeyForEditor(cm, name, handle) {
    for (var i = 0; i < cm.state.keyMaps.length; i++) {
      var result = lookupKey(name, cm.state.keyMaps[i], handle, cm);
      if (result) { return result }
    }
    return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
      || lookupKey(name, cm.options.keyMap, handle, cm)
  }

  // Note that, despite the name, this function is also used to check
  // for bound mouse clicks.

  var stopSeq = new Delayed;

  function dispatchKey(cm, name, e, handle) {
    var seq = cm.state.keySeq;
    if (seq) {
      if (isModifierKey(name)) { return "handled" }
      if (/\'$/.test(name))
        { cm.state.keySeq = null; }
      else
        { stopSeq.set(50, function () {
          if (cm.state.keySeq == seq) {
            cm.state.keySeq = null;
            cm.display.input.reset();
          }
        }); }
      if (dispatchKeyInner(cm, seq + " " + name, e, handle)) { return true }
    }
    return dispatchKeyInner(cm, name, e, handle)
  }

  function dispatchKeyInner(cm, name, e, handle) {
    var result = lookupKeyForEditor(cm, name, handle);

    if (result == "multi")
      { cm.state.keySeq = name; }
    if (result == "handled")
      { signalLater(cm, "keyHandled", cm, name, e); }

    if (result == "handled" || result == "multi") {
      e_preventDefault(e);
      restartBlink(cm);
    }

    return !!result
  }

  // Handle a key from the keydown event.
  function handleKeyBinding(cm, e) {
    var name = keyName(e, true);
    if (!name) { return false }

    if (e.shiftKey && !cm.state.keySeq) {
      // First try to resolve full name (including 'Shift-'). Failing
      // that, see if there is a cursor-motion command (starting with
      // 'go') bound to the keyname without 'Shift-'.
      return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
          || dispatchKey(cm, name, e, function (b) {
               if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
                 { return doHandleBinding(cm, b) }
             })
    } else {
      return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })
    }
  }

  // Handle a key from the keypress event
  function handleCharBinding(cm, e, ch) {
    return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })
  }

  var lastStoppedKey = null;
  function onKeyDown(e) {
    var cm = this;
    if (e.target && e.target != cm.display.input.getField()) { return }
    cm.curOp.focus = activeElt(doc(cm));
    if (signalDOMEvent(cm, e)) { return }
    // IE does strange things with escape.
    if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false; }
    var code = e.keyCode;
    cm.display.shift = code == 16 || e.shiftKey;
    var handled = handleKeyBinding(cm, e);
    if (presto) {
      lastStoppedKey = handled ? code : null;
      // Opera has no cut event... we try to at least catch the key combo
      if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
        { cm.replaceSelection("", null, "cut"); }
    }
    if (gecko && !mac && !handled && code == 46 && e.shiftKey && !e.ctrlKey && document.execCommand)
      { document.execCommand("cut"); }

    // Turn mouse into crosshair when Alt is held on Mac.
    if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
      { showCrossHair(cm); }
  }

  function showCrossHair(cm) {
    var lineDiv = cm.display.lineDiv;
    addClass(lineDiv, "CodeMirror-crosshair");

    function up(e) {
      if (e.keyCode == 18 || !e.altKey) {
        rmClass(lineDiv, "CodeMirror-crosshair");
        off(document, "keyup", up);
        off(document, "mouseover", up);
      }
    }
    on(document, "keyup", up);
    on(document, "mouseover", up);
  }

  function onKeyUp(e) {
    if (e.keyCode == 16) { this.doc.sel.shift = false; }
    signalDOMEvent(this, e);
  }

  function onKeyPress(e) {
    var cm = this;
    if (e.target && e.target != cm.display.input.getField()) { return }
    if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
    var keyCode = e.keyCode, charCode = e.charCode;
    if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
    if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
    var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
    // Some browsers fire keypress events for backspace
    if (ch == "\x08") { return }
    if (handleCharBinding(cm, e, ch)) { return }
    cm.display.input.onKeyPress(e);
  }

  var DOUBLECLICK_DELAY = 400;

  var PastClick = function(time, pos, button) {
    this.time = time;
    this.pos = pos;
    this.button = button;
  };

  PastClick.prototype.compare = function (time, pos, button) {
    return this.time + DOUBLECLICK_DELAY > time &&
      cmp(pos, this.pos) == 0 && button == this.button
  };

  var lastClick, lastDoubleClick;
  function clickRepeat(pos, button) {
    var now = +new Date;
    if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
      lastClick = lastDoubleClick = null;
      return "triple"
    } else if (lastClick && lastClick.compare(now, pos, button)) {
      lastDoubleClick = new PastClick(now, pos, button);
      lastClick = null;
      return "double"
    } else {
      lastClick = new PastClick(now, pos, button);
      lastDoubleClick = null;
      return "single"
    }
  }

  // A mouse down can be a single click, double click, triple click,
  // start of selection drag, start of text drag, new cursor
  // (ctrl-click), rectangle drag (alt-drag), or xwin
  // middle-click-paste. Or it might be a click on something we should
  // not interfere with, such as a scrollbar or widget.
  function onMouseDown(e) {
    var cm = this, display = cm.display;
    if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
    display.input.ensurePolled();
    display.shift = e.shiftKey;

    if (eventInWidget(display, e)) {
      if (!webkit) {
        // Briefly turn off draggability, to allow widgets to do
        // normal dragging things.
        display.scroller.draggable = false;
        setTimeout(function () { return display.scroller.draggable = true; }, 100);
      }
      return
    }
    if (clickInGutter(cm, e)) { return }
    var pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single";
    win(cm).focus();

    // #3261: make sure, that we're not starting a second selection
    if (button == 1 && cm.state.selectingText)
      { cm.state.selectingText(e); }

    if (pos && handleMappedButton(cm, button, pos, repeat, e)) { return }

    if (button == 1) {
      if (pos) { leftButtonDown(cm, pos, repeat, e); }
      else if (e_target(e) == display.scroller) { e_preventDefault(e); }
    } else if (button == 2) {
      if (pos) { extendSelection(cm.doc, pos); }
      setTimeout(function () { return display.input.focus(); }, 20);
    } else if (button == 3) {
      if (captureRightClick) { cm.display.input.onContextMenu(e); }
      else { delayBlurEvent(cm); }
    }
  }

  function handleMappedButton(cm, button, pos, repeat, event) {
    var name = "Click";
    if (repeat == "double") { name = "Double" + name; }
    else if (repeat == "triple") { name = "Triple" + name; }
    name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name;

    return dispatchKey(cm,  addModifierNames(name, event), event, function (bound) {
      if (typeof bound == "string") { bound = commands[bound]; }
      if (!bound) { return false }
      var done = false;
      try {
        if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
        done = bound(cm, pos) != Pass;
      } finally {
        cm.state.suppressEdits = false;
      }
      return done
    })
  }

  function configureMouse(cm, repeat, event) {
    var option = cm.getOption("configureMouse");
    var value = option ? option(cm, repeat, event) : {};
    if (value.unit == null) {
      var rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey;
      value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line";
    }
    if (value.extend == null || cm.doc.extend) { value.extend = cm.doc.extend || event.shiftKey; }
    if (value.addNew == null) { value.addNew = mac ? event.metaKey : event.ctrlKey; }
    if (value.moveOnDrag == null) { value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey); }
    return value
  }

  function leftButtonDown(cm, pos, repeat, event) {
    if (ie) { setTimeout(bind(ensureFocus, cm), 0); }
    else { cm.curOp.focus = activeElt(doc(cm)); }

    var behavior = configureMouse(cm, repeat, event);

    var sel = cm.doc.sel, contained;
    if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
        repeat == "single" && (contained = sel.contains(pos)) > -1 &&
        (cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
        (cmp(contained.to(), pos) > 0 || pos.xRel < 0))
      { leftButtonStartDrag(cm, event, pos, behavior); }
    else
      { leftButtonSelect(cm, event, pos, behavior); }
  }

  // Start a text drag. When it ends, see if any dragging actually
  // happen, and treat as a click if it didn't.
  function leftButtonStartDrag(cm, event, pos, behavior) {
    var display = cm.display, moved = false;
    var dragEnd = operation(cm, function (e) {
      if (webkit) { display.scroller.draggable = false; }
      cm.state.draggingText = false;
      if (cm.state.delayingBlurEvent) {
        if (cm.hasFocus()) { cm.state.delayingBlurEvent = false; }
        else { delayBlurEvent(cm); }
      }
      off(display.wrapper.ownerDocument, "mouseup", dragEnd);
      off(display.wrapper.ownerDocument, "mousemove", mouseMove);
      off(display.scroller, "dragstart", dragStart);
      off(display.scroller, "drop", dragEnd);
      if (!moved) {
        e_preventDefault(e);
        if (!behavior.addNew)
          { extendSelection(cm.doc, pos, null, null, behavior.extend); }
        // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
        if ((webkit && !safari) || ie && ie_version == 9)
          { setTimeout(function () {display.wrapper.ownerDocument.body.focus({preventScroll: true}); display.input.focus();}, 20); }
        else
          { display.input.focus(); }
      }
    });
    var mouseMove = function(e2) {
      moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10;
    };
    var dragStart = function () { return moved = true; };
    // Let the drag handler handle this.
    if (webkit) { display.scroller.draggable = true; }
    cm.state.draggingText = dragEnd;
    dragEnd.copy = !behavior.moveOnDrag;
    on(display.wrapper.ownerDocument, "mouseup", dragEnd);
    on(display.wrapper.ownerDocument, "mousemove", mouseMove);
    on(display.scroller, "dragstart", dragStart);
    on(display.scroller, "drop", dragEnd);

    cm.state.delayingBlurEvent = true;
    setTimeout(function () { return display.input.focus(); }, 20);
    // IE's approach to draggable
    if (display.scroller.dragDrop) { display.scroller.dragDrop(); }
  }

  function rangeForUnit(cm, pos, unit) {
    if (unit == "char") { return new Range(pos, pos) }
    if (unit == "word") { return cm.findWordAt(pos) }
    if (unit == "line") { return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
    var result = unit(cm, pos);
    return new Range(result.from, result.to)
  }

  // Normal selection, as opposed to text dragging.
  function leftButtonSelect(cm, event, start, behavior) {
    if (ie) { delayBlurEvent(cm); }
    var display = cm.display, doc$1 = cm.doc;
    e_preventDefault(event);

    var ourRange, ourIndex, startSel = doc$1.sel, ranges = startSel.ranges;
    if (behavior.addNew && !behavior.extend) {
      ourIndex = doc$1.sel.contains(start);
      if (ourIndex > -1)
        { ourRange = ranges[ourIndex]; }
      else
        { ourRange = new Range(start, start); }
    } else {
      ourRange = doc$1.sel.primary();
      ourIndex = doc$1.sel.primIndex;
    }

    if (behavior.unit == "rectangle") {
      if (!behavior.addNew) { ourRange = new Range(start, start); }
      start = posFromMouse(cm, event, true, true);
      ourIndex = -1;
    } else {
      var range = rangeForUnit(cm, start, behavior.unit);
      if (behavior.extend)
        { ourRange = extendRange(ourRange, range.anchor, range.head, behavior.extend); }
      else
        { ourRange = range; }
    }

    if (!behavior.addNew) {
      ourIndex = 0;
      setSelection(doc$1, new Selection([ourRange], 0), sel_mouse);
      startSel = doc$1.sel;
    } else if (ourIndex == -1) {
      ourIndex = ranges.length;
      setSelection(doc$1, normalizeSelection(cm, ranges.concat([ourRange]), ourIndex),
                   {scroll: false, origin: "*mouse"});
    } else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
      setSelection(doc$1, normalizeSelection(cm, ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
                   {scroll: false, origin: "*mouse"});
      startSel = doc$1.sel;
    } else {
      replaceOneSelection(doc$1, ourIndex, ourRange, sel_mouse);
    }

    var lastPos = start;
    function extendTo(pos) {
      if (cmp(lastPos, pos) == 0) { return }
      lastPos = pos;

      if (behavior.unit == "rectangle") {
        var ranges = [], tabSize = cm.options.tabSize;
        var startCol = countColumn(getLine(doc$1, start.line).text, start.ch, tabSize);
        var posCol = countColumn(getLine(doc$1, pos.line).text, pos.ch, tabSize);
        var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol);
        for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
             line <= end; line++) {
          var text = getLine(doc$1, line).text, leftPos = findColumn(text, left, tabSize);
          if (left == right)
            { ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))); }
          else if (text.length > leftPos)
            { ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))); }
        }
        if (!ranges.length) { ranges.push(new Range(start, start)); }
        setSelection(doc$1, normalizeSelection(cm, startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
                     {origin: "*mouse", scroll: false});
        cm.scrollIntoView(pos);
      } else {
        var oldRange = ourRange;
        var range = rangeForUnit(cm, pos, behavior.unit);
        var anchor = oldRange.anchor, head;
        if (cmp(range.anchor, anchor) > 0) {
          head = range.head;
          anchor = minPos(oldRange.from(), range.anchor);
        } else {
          head = range.anchor;
          anchor = maxPos(oldRange.to(), range.head);
        }
        var ranges$1 = startSel.ranges.slice(0);
        ranges$1[ourIndex] = bidiSimplify(cm, new Range(clipPos(doc$1, anchor), head));
        setSelection(doc$1, normalizeSelection(cm, ranges$1, ourIndex), sel_mouse);
      }
    }

    var editorSize = display.wrapper.getBoundingClientRect();
    // Used to ensure timeout re-tries don't fire when another extend
    // happened in the meantime (clearTimeout isn't reliable -- at
    // least on Chrome, the timeouts still happen even when cleared,
    // if the clear happens after their scheduled firing time).
    var counter = 0;

    function extend(e) {
      var curCount = ++counter;
      var cur = posFromMouse(cm, e, true, behavior.unit == "rectangle");
      if (!cur) { return }
      if (cmp(cur, lastPos) != 0) {
        cm.curOp.focus = activeElt(doc(cm));
        extendTo(cur);
        var visible = visibleLines(display, doc$1);
        if (cur.line >= visible.to || cur.line < visible.from)
          { setTimeout(operation(cm, function () {if (counter == curCount) { extend(e); }}), 150); }
      } else {
        var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
        if (outside) { setTimeout(operation(cm, function () {
          if (counter != curCount) { return }
          display.scroller.scrollTop += outside;
          extend(e);
        }), 50); }
      }
    }

    function done(e) {
      cm.state.selectingText = false;
      counter = Infinity;
      // If e is null or undefined we interpret this as someone trying
      // to explicitly cancel the selection rather than the user
      // letting go of the mouse button.
      if (e) {
        e_preventDefault(e);
        display.input.focus();
      }
      off(display.wrapper.ownerDocument, "mousemove", move);
      off(display.wrapper.ownerDocument, "mouseup", up);
      doc$1.history.lastSelOrigin = null;
    }

    var move = operation(cm, function (e) {
      if (e.buttons === 0 || !e_button(e)) { done(e); }
      else { extend(e); }
    });
    var up = operation(cm, done);
    cm.state.selectingText = up;
    on(display.wrapper.ownerDocument, "mousemove", move);
    on(display.wrapper.ownerDocument, "mouseup", up);
  }

  // Used when mouse-selecting to adjust the anchor to the proper side
  // of a bidi jump depending on the visual position of the head.
  function bidiSimplify(cm, range) {
    var anchor = range.anchor;
    var head = range.head;
    var anchorLine = getLine(cm.doc, anchor.line);
    if (cmp(anchor, head) == 0 && anchor.sticky == head.sticky) { return range }
    var order = getOrder(anchorLine);
    if (!order) { return range }
    var index = getBidiPartAt(order, anchor.ch, anchor.sticky), part = order[index];
    if (part.from != anchor.ch && part.to != anchor.ch) { return range }
    var boundary = index + ((part.from == anchor.ch) == (part.level != 1) ? 0 : 1);
    if (boundary == 0 || boundary == order.length) { return range }

    // Compute the relative visual position of the head compared to the
    // anchor (<0 is to the left, >0 to the right)
    var leftSide;
    if (head.line != anchor.line) {
      leftSide = (head.line - anchor.line) * (cm.doc.direction == "ltr" ? 1 : -1) > 0;
    } else {
      var headIndex = getBidiPartAt(order, head.ch, head.sticky);
      var dir = headIndex - index || (head.ch - anchor.ch) * (part.level == 1 ? -1 : 1);
      if (headIndex == boundary - 1 || headIndex == boundary)
        { leftSide = dir < 0; }
      else
        { leftSide = dir > 0; }
    }

    var usePart = order[boundary + (leftSide ? -1 : 0)];
    var from = leftSide == (usePart.level == 1);
    var ch = from ? usePart.from : usePart.to, sticky = from ? "after" : "before";
    return anchor.ch == ch && anchor.sticky == sticky ? range : new Range(new Pos(anchor.line, ch, sticky), head)
  }


  // Determines whether an event happened in the gutter, and fires the
  // handlers for the corresponding event.
  function gutterEvent(cm, e, type, prevent) {
    var mX, mY;
    if (e.touches) {
      mX = e.touches[0].clientX;
      mY = e.touches[0].clientY;
    } else {
      try { mX = e.clientX; mY = e.clientY; }
      catch(e$1) { return false }
    }
    if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
    if (prevent) { e_preventDefault(e); }

    var display = cm.display;
    var lineBox = display.lineDiv.getBoundingClientRect();

    if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
    mY -= lineBox.top - display.viewOffset;

    for (var i = 0; i < cm.display.gutterSpecs.length; ++i) {
      var g = display.gutters.childNodes[i];
      if (g && g.getBoundingClientRect().right >= mX) {
        var line = lineAtHeight(cm.doc, mY);
        var gutter = cm.display.gutterSpecs[i];
        signal(cm, type, cm, line, gutter.className, e);
        return e_defaultPrevented(e)
      }
    }
  }

  function clickInGutter(cm, e) {
    return gutterEvent(cm, e, "gutterClick", true)
  }

  // CONTEXT MENU HANDLING

  // To make the context menu work, we need to briefly unhide the
  // textarea (making it as unobtrusive as possible) to let the
  // right-click take effect on it.
  function onContextMenu(cm, e) {
    if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
    if (signalDOMEvent(cm, e, "contextmenu")) { return }
    if (!captureRightClick) { cm.display.input.onContextMenu(e); }
  }

  function contextMenuInGutter(cm, e) {
    if (!hasHandler(cm, "gutterContextMenu")) { return false }
    return gutterEvent(cm, e, "gutterContextMenu", false)
  }

  function themeChanged(cm) {
    cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
      cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
    clearCaches(cm);
  }

  var Init = {toString: function(){return "CodeMirror.Init"}};

  var defaults = {};
  var optionHandlers = {};

  function defineOptions(CodeMirror) {
    var optionHandlers = CodeMirror.optionHandlers;

    function option(name, deflt, handle, notOnInit) {
      CodeMirror.defaults[name] = deflt;
      if (handle) { optionHandlers[name] =
        notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old); }} : handle; }
    }

    CodeMirror.defineOption = option;

    // Passed to option handlers when there is no old value.
    CodeMirror.Init = Init;

    // These two are, on init, called from the constructor because they
    // have to be initialized before the editor can start at all.
    option("value", "", function (cm, val) { return cm.setValue(val); }, true);
    option("mode", null, function (cm, val) {
      cm.doc.modeOption = val;
      loadMode(cm);
    }, true);

    option("indentUnit", 2, loadMode, true);
    option("indentWithTabs", false);
    option("smartIndent", true);
    option("tabSize", 4, function (cm) {
      resetModeState(cm);
      clearCaches(cm);
      regChange(cm);
    }, true);

    option("lineSeparator", null, function (cm, val) {
      cm.doc.lineSep = val;
      if (!val) { return }
      var newBreaks = [], lineNo = cm.doc.first;
      cm.doc.iter(function (line) {
        for (var pos = 0;;) {
          var found = line.text.indexOf(val, pos);
          if (found == -1) { break }
          pos = found + val.length;
          newBreaks.push(Pos(lineNo, found));
        }
        lineNo++;
      });
      for (var i = newBreaks.length - 1; i >= 0; i--)
        { replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)); }
    });
    option("specialChars", /[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b\u200e\u200f\u2028\u2029\u202d\u202e\u2066\u2067\u2069\ufeff\ufff9-\ufffc]/g, function (cm, val, old) {
      cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
      if (old != Init) { cm.refresh(); }
    });
    option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true);
    option("electricChars", true);
    option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
      throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
    }, true);
    option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true);
    option("autocorrect", false, function (cm, val) { return cm.getInputField().autocorrect = val; }, true);
    option("autocapitalize", false, function (cm, val) { return cm.getInputField().autocapitalize = val; }, true);
    option("rtlMoveVisually", !windows);
    option("wholeLineUpdateBefore", true);

    option("theme", "default", function (cm) {
      themeChanged(cm);
      updateGutters(cm);
    }, true);
    option("keyMap", "default", function (cm, val, old) {
      var next = getKeyMap(val);
      var prev = old != Init && getKeyMap(old);
      if (prev && prev.detach) { prev.detach(cm, next); }
      if (next.attach) { next.attach(cm, prev || null); }
    });
    option("extraKeys", null);
    option("configureMouse", null);

    option("lineWrapping", false, wrappingChanged, true);
    option("gutters", [], function (cm, val) {
      cm.display.gutterSpecs = getGutters(val, cm.options.lineNumbers);
      updateGutters(cm);
    }, true);
    option("fixedGutter", true, function (cm, val) {
      cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
      cm.refresh();
    }, true);
    option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true);
    option("scrollbarStyle", "native", function (cm) {
      initScrollbars(cm);
      updateScrollbars(cm);
      cm.display.scrollbars.setScrollTop(cm.doc.scrollTop);
      cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft);
    }, true);
    option("lineNumbers", false, function (cm, val) {
      cm.display.gutterSpecs = getGutters(cm.options.gutters, val);
      updateGutters(cm);
    }, true);
    option("firstLineNumber", 1, updateGutters, true);
    option("lineNumberFormatter", function (integer) { return integer; }, updateGutters, true);
    option("showCursorWhenSelecting", false, updateSelection, true);

    option("resetSelectionOnContextMenu", true);
    option("lineWiseCopyCut", true);
    option("pasteLinesPerSelection", true);
    option("selectionsMayTouch", false);

    option("readOnly", false, function (cm, val) {
      if (val == "nocursor") {
        onBlur(cm);
        cm.display.input.blur();
      }
      cm.display.input.readOnlyChanged(val);
    });

    option("screenReaderLabel", null, function (cm, val) {
      val = (val === '') ? null : val;
      cm.display.input.screenReaderLabelChanged(val);
    });

    option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset(); }}, true);
    option("dragDrop", true, dragDropChanged);
    option("allowDropFileTypes", null);

    option("cursorBlinkRate", 530);
    option("cursorScrollMargin", 0);
    option("cursorHeight", 1, updateSelection, true);
    option("singleCursorHeightPerLine", true, updateSelection, true);
    option("workTime", 100);
    option("workDelay", 100);
    option("flattenSpans", true, resetModeState, true);
    option("addModeClass", false, resetModeState, true);
    option("pollInterval", 100);
    option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; });
    option("historyEventDelay", 1250);
    option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true);
    option("maxHighlightLength", 10000, resetModeState, true);
    option("moveInputWithCursor", true, function (cm, val) {
      if (!val) { cm.display.input.resetPosition(); }
    });

    option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; });
    option("autofocus", null);
    option("direction", "ltr", function (cm, val) { return cm.doc.setDirection(val); }, true);
    option("phrases", null);
  }

  function dragDropChanged(cm, value, old) {
    var wasOn = old && old != Init;
    if (!value != !wasOn) {
      var funcs = cm.display.dragFunctions;
      var toggle = value ? on : off;
      toggle(cm.display.scroller, "dragstart", funcs.start);
      toggle(cm.display.scroller, "dragenter", funcs.enter);
      toggle(cm.display.scroller, "dragover", funcs.over);
      toggle(cm.display.scroller, "dragleave", funcs.leave);
      toggle(cm.display.scroller, "drop", funcs.drop);
    }
  }

  function wrappingChanged(cm) {
    if (cm.options.lineWrapping) {
      addClass(cm.display.wrapper, "CodeMirror-wrap");
      cm.display.sizer.style.minWidth = "";
      cm.display.sizerWidth = null;
    } else {
      rmClass(cm.display.wrapper, "CodeMirror-wrap");
      findMaxLine(cm);
    }
    estimateLineHeights(cm);
    regChange(cm);
    clearCaches(cm);
    setTimeout(function () { return updateScrollbars(cm); }, 100);
  }

  // A CodeMirror instance represents an editor. This is the object
  // that user code is usually dealing with.

  function CodeMirror(place, options) {
    var this$1 = this;

    if (!(this instanceof CodeMirror)) { return new CodeMirror(place, options) }

    this.options = options = options ? copyObj(options) : {};
    // Determine effective options based on given values and defaults.
    copyObj(defaults, options, false);

    var doc = options.value;
    if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction); }
    else if (options.mode) { doc.modeOption = options.mode; }
    this.doc = doc;

    var input = new CodeMirror.inputStyles[options.inputStyle](this);
    var display = this.display = new Display(place, doc, input, options);
    display.wrapper.CodeMirror = this;
    themeChanged(this);
    if (options.lineWrapping)
      { this.display.wrapper.className += " CodeMirror-wrap"; }
    initScrollbars(this);

    this.state = {
      keyMaps: [],  // stores maps added by addKeyMap
      overlays: [], // highlighting overlays, as added by addOverlay
      modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
      overwrite: false,
      delayingBlurEvent: false,
      focused: false,
      suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
      pasteIncoming: -1, cutIncoming: -1, // help recognize paste/cut edits in input.poll
      selectingText: false,
      draggingText: false,
      highlight: new Delayed(), // stores highlight worker timeout
      keySeq: null,  // Unfinished key sequence
      specialChars: null
    };

    if (options.autofocus && !mobile) { display.input.focus(); }

    // Override magic textarea content restore that IE sometimes does
    // on our hidden textarea on reload
    if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20); }

    registerEventHandlers(this);
    ensureGlobalHandlers();

    startOperation(this);
    this.curOp.forceUpdate = true;
    attachDoc(this, doc);

    if ((options.autofocus && !mobile) || this.hasFocus())
      { setTimeout(function () {
        if (this$1.hasFocus() && !this$1.state.focused) { onFocus(this$1); }
      }, 20); }
    else
      { onBlur(this); }

    for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
      { optionHandlers[opt](this, options[opt], Init); } }
    maybeUpdateLineNumberWidth(this);
    if (options.finishInit) { options.finishInit(this); }
    for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this); }
    endOperation(this);
    // Suppress optimizelegibility in Webkit, since it breaks text
    // measuring on line wrapping boundaries.
    if (webkit && options.lineWrapping &&
        getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
      { display.lineDiv.style.textRendering = "auto"; }
  }

  // The default configuration options.
  CodeMirror.defaults = defaults;
  // Functions to run when options are changed.
  CodeMirror.optionHandlers = optionHandlers;

  // Attach the necessary event handlers when initializing the editor
  function registerEventHandlers(cm) {
    var d = cm.display;
    on(d.scroller, "mousedown", operation(cm, onMouseDown));
    // Older IE's will not fire a second mousedown for a double click
    if (ie && ie_version < 11)
      { on(d.scroller, "dblclick", operation(cm, function (e) {
        if (signalDOMEvent(cm, e)) { return }
        var pos = posFromMouse(cm, e);
        if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
        e_preventDefault(e);
        var word = cm.findWordAt(pos);
        extendSelection(cm.doc, word.anchor, word.head);
      })); }
    else
      { on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }); }
    // Some browsers fire contextmenu *after* opening the menu, at
    // which point we can't mess with it anymore. Context menu is
    // handled in onMouseDown for these browsers.
    on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); });
    on(d.input.getField(), "contextmenu", function (e) {
      if (!d.scroller.contains(e.target)) { onContextMenu(cm, e); }
    });

    // Used to suppress mouse event handling when a touch happens
    var touchFinished, prevTouch = {end: 0};
    function finishTouch() {
      if (d.activeTouch) {
        touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000);
        prevTouch = d.activeTouch;
        prevTouch.end = +new Date;
      }
    }
    function isMouseLikeTouchEvent(e) {
      if (e.touches.length != 1) { return false }
      var touch = e.touches[0];
      return touch.radiusX <= 1 && touch.radiusY <= 1
    }
    function farAway(touch, other) {
      if (other.left == null) { return true }
      var dx = other.left - touch.left, dy = other.top - touch.top;
      return dx * dx + dy * dy > 20 * 20
    }
    on(d.scroller, "touchstart", function (e) {
      if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e) && !clickInGutter(cm, e)) {
        d.input.ensurePolled();
        clearTimeout(touchFinished);
        var now = +new Date;
        d.activeTouch = {start: now, moved: false,
                         prev: now - prevTouch.end <= 300 ? prevTouch : null};
        if (e.touches.length == 1) {
          d.activeTouch.left = e.touches[0].pageX;
          d.activeTouch.top = e.touches[0].pageY;
        }
      }
    });
    on(d.scroller, "touchmove", function () {
      if (d.activeTouch) { d.activeTouch.moved = true; }
    });
    on(d.scroller, "touchend", function (e) {
      var touch = d.activeTouch;
      if (touch && !eventInWidget(d, e) && touch.left != null &&
          !touch.moved && new Date - touch.start < 300) {
        var pos = cm.coordsChar(d.activeTouch, "page"), range;
        if (!touch.prev || farAway(touch, touch.prev)) // Single tap
          { range = new Range(pos, pos); }
        else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
          { range = cm.findWordAt(pos); }
        else // Triple tap
          { range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))); }
        cm.setSelection(range.anchor, range.head);
        cm.focus();
        e_preventDefault(e);
      }
      finishTouch();
    });
    on(d.scroller, "touchcancel", finishTouch);

    // Sync scrolling between fake scrollbars and real scrollable
    // area, ensure viewport is updated when scrolling.
    on(d.scroller, "scroll", function () {
      if (d.scroller.clientHeight) {
        updateScrollTop(cm, d.scroller.scrollTop);
        setScrollLeft(cm, d.scroller.scrollLeft, true);
        signal(cm, "scroll", cm);
      }
    });

    // Listen to wheel events in order to try and update the viewport on time.
    on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); });
    on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); });

    // Prevent wrapper from ever scrolling
    on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });

    d.dragFunctions = {
      enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e); }},
      over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }},
      start: function (e) { return onDragStart(cm, e); },
      drop: operation(cm, onDrop),
      leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm); }}
    };

    var inp = d.input.getField();
    on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); });
    on(inp, "keydown", operation(cm, onKeyDown));
    on(inp, "keypress", operation(cm, onKeyPress));
    on(inp, "focus", function (e) { return onFocus(cm, e); });
    on(inp, "blur", function (e) { return onBlur(cm, e); });
  }

  var initHooks = [];
  CodeMirror.defineInitHook = function (f) { return initHooks.push(f); };

  // Indent the given line. The how parameter can be "smart",
  // "add"/null, "subtract", or "prev". When aggressive is false
  // (typically set to true for forced single-line indents), empty
  // lines are not indented, and places where the mode returns Pass
  // are left alone.
  function indentLine(cm, n, how, aggressive) {
    var doc = cm.doc, state;
    if (how == null) { how = "add"; }
    if (how == "smart") {
      // Fall back to "prev" when the mode doesn't have an indentation
      // method.
      if (!doc.mode.indent) { how = "prev"; }
      else { state = getContextBefore(cm, n).state; }
    }

    var tabSize = cm.options.tabSize;
    var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
    if (line.stateAfter) { line.stateAfter = null; }
    var curSpaceString = line.text.match(/^\s*/)[0], indentation;
    if (!aggressive && !/\S/.test(line.text)) {
      indentation = 0;
      how = "not";
    } else if (how == "smart") {
      indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
      if (indentation == Pass || indentation > 150) {
        if (!aggressive) { return }
        how = "prev";
      }
    }
    if (how == "prev") {
      if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize); }
      else { indentation = 0; }
    } else if (how == "add") {
      indentation = curSpace + cm.options.indentUnit;
    } else if (how == "subtract") {
      indentation = curSpace - cm.options.indentUnit;
    } else if (typeof how == "number") {
      indentation = curSpace + how;
    }
    indentation = Math.max(0, indentation);

    var indentString = "", pos = 0;
    if (cm.options.indentWithTabs)
      { for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";} }
    if (pos < indentation) { indentString += spaceStr(indentation - pos); }

    if (indentString != curSpaceString) {
      replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
      line.stateAfter = null;
      return true
    } else {
      // Ensure that, if the cursor was in the whitespace at the start
      // of the line, it is moved to the end of that space.
      for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
        var range = doc.sel.ranges[i$1];
        if (range.head.line == n && range.head.ch < curSpaceString.length) {
          var pos$1 = Pos(n, curSpaceString.length);
          replaceOneSelection(doc, i$1, new Range(pos$1, pos$1));
          break
        }
      }
    }
  }

  // This will be set to a {lineWise: bool, text: [string]} object, so
  // that, when pasting, we know what kind of selections the copied
  // text was made out of.
  var lastCopied = null;

  function setLastCopied(newLastCopied) {
    lastCopied = newLastCopied;
  }

  function applyTextInput(cm, inserted, deleted, sel, origin) {
    var doc = cm.doc;
    cm.display.shift = false;
    if (!sel) { sel = doc.sel; }

    var recent = +new Date - 200;
    var paste = origin == "paste" || cm.state.pasteIncoming > recent;
    var textLines = splitLinesAuto(inserted), multiPaste = null;
    // When pasting N lines into N selections, insert one line per selection
    if (paste && sel.ranges.length > 1) {
      if (lastCopied && lastCopied.text.join("\n") == inserted) {
        if (sel.ranges.length % lastCopied.text.length == 0) {
          multiPaste = [];
          for (var i = 0; i < lastCopied.text.length; i++)
            { multiPaste.push(doc.splitLines(lastCopied.text[i])); }
        }
      } else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
        multiPaste = map(textLines, function (l) { return [l]; });
      }
    }

    var updateInput = cm.curOp.updateInput;
    // Normal behavior is to insert the new text into every selection
    for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
      var range = sel.ranges[i$1];
      var from = range.from(), to = range.to();
      if (range.empty()) {
        if (deleted && deleted > 0) // Handle deletion
          { from = Pos(from.line, from.ch - deleted); }
        else if (cm.state.overwrite && !paste) // Handle overwrite
          { to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)); }
        else if (paste && lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == textLines.join("\n"))
          { from = to = Pos(from.line, 0); }
      }
      var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
                         origin: origin || (paste ? "paste" : cm.state.cutIncoming > recent ? "cut" : "+input")};
      makeChange(cm.doc, changeEvent);
      signalLater(cm, "inputRead", cm, changeEvent);
    }
    if (inserted && !paste)
      { triggerElectric(cm, inserted); }

    ensureCursorVisible(cm);
    if (cm.curOp.updateInput < 2) { cm.curOp.updateInput = updateInput; }
    cm.curOp.typing = true;
    cm.state.pasteIncoming = cm.state.cutIncoming = -1;
  }

  function handlePaste(e, cm) {
    var pasted = e.clipboardData && e.clipboardData.getData("Text");
    if (pasted) {
      e.preventDefault();
      if (!cm.isReadOnly() && !cm.options.disableInput && cm.hasFocus())
        { runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }); }
      return true
    }
  }

  function triggerElectric(cm, inserted) {
    // When an 'electric' character is inserted, immediately trigger a reindent
    if (!cm.options.electricChars || !cm.options.smartIndent) { return }
    var sel = cm.doc.sel;

    for (var i = sel.ranges.length - 1; i >= 0; i--) {
      var range = sel.ranges[i];
      if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) { continue }
      var mode = cm.getModeAt(range.head);
      var indented = false;
      if (mode.electricChars) {
        for (var j = 0; j < mode.electricChars.length; j++)
          { if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
            indented = indentLine(cm, range.head.line, "smart");
            break
          } }
      } else if (mode.electricInput) {
        if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
          { indented = indentLine(cm, range.head.line, "smart"); }
      }
      if (indented) { signalLater(cm, "electricInput", cm, range.head.line); }
    }
  }

  function copyableRanges(cm) {
    var text = [], ranges = [];
    for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
      var line = cm.doc.sel.ranges[i].head.line;
      var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
      ranges.push(lineRange);
      text.push(cm.getRange(lineRange.anchor, lineRange.head));
    }
    return {text: text, ranges: ranges}
  }

  function disableBrowserMagic(field, spellcheck, autocorrect, autocapitalize) {
    field.setAttribute("autocorrect", autocorrect ? "on" : "off");
    field.setAttribute("autocapitalize", autocapitalize ? "on" : "off");
    field.setAttribute("spellcheck", !!spellcheck);
  }

  function hiddenTextarea() {
    var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; min-height: 1em; outline: none");
    var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
    // The textarea is kept positioned near the cursor to prevent the
    // fact that it'll be scrolled into view on input from scrolling
    // our fake cursor out of view. On webkit, when wrap=off, paste is
    // very slow. So make the area wide instead.
    if (webkit) { te.style.width = "1000px"; }
    else { te.setAttribute("wrap", "off"); }
    // If border: 0; -- iOS fails to open keyboard (issue #1287)
    if (ios) { te.style.border = "1px solid black"; }
    return div
  }

  // The publicly visible API. Note that methodOp(f) means
  // 'wrap f in an operation, performed on its `this` parameter'.

  // This is not the complete set of editor methods. Most of the
  // methods defined on the Doc type are also injected into
  // CodeMirror.prototype, for backwards compatibility and
  // convenience.

  function addEditorMethods(CodeMirror) {
    var optionHandlers = CodeMirror.optionHandlers;

    var helpers = CodeMirror.helpers = {};

    CodeMirror.prototype = {
      constructor: CodeMirror,
      focus: function(){win(this).focus(); this.display.input.focus();},

      setOption: function(option, value) {
        var options = this.options, old = options[option];
        if (options[option] == value && option != "mode") { return }
        options[option] = value;
        if (optionHandlers.hasOwnProperty(option))
          { operation(this, optionHandlers[option])(this, value, old); }
        signal(this, "optionChange", this, option);
      },

      getOption: function(option) {return this.options[option]},
      getDoc: function() {return this.doc},

      addKeyMap: function(map, bottom) {
        this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map));
      },
      removeKeyMap: function(map) {
        var maps = this.state.keyMaps;
        for (var i = 0; i < maps.length; ++i)
          { if (maps[i] == map || maps[i].name == map) {
            maps.splice(i, 1);
            return true
          } }
      },

      addOverlay: methodOp(function(spec, options) {
        var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
        if (mode.startState) { throw new Error("Overlays may not be stateful.") }
        insertSorted(this.state.overlays,
                     {mode: mode, modeSpec: spec, opaque: options && options.opaque,
                      priority: (options && options.priority) || 0},
                     function (overlay) { return overlay.priority; });
        this.state.modeGen++;
        regChange(this);
      }),
      removeOverlay: methodOp(function(spec) {
        var overlays = this.state.overlays;
        for (var i = 0; i < overlays.length; ++i) {
          var cur = overlays[i].modeSpec;
          if (cur == spec || typeof spec == "string" && cur.name == spec) {
            overlays.splice(i, 1);
            this.state.modeGen++;
            regChange(this);
            return
          }
        }
      }),

      indentLine: methodOp(function(n, dir, aggressive) {
        if (typeof dir != "string" && typeof dir != "number") {
          if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev"; }
          else { dir = dir ? "add" : "subtract"; }
        }
        if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive); }
      }),
      indentSelection: methodOp(function(how) {
        var ranges = this.doc.sel.ranges, end = -1;
        for (var i = 0; i < ranges.length; i++) {
          var range = ranges[i];
          if (!range.empty()) {
            var from = range.from(), to = range.to();
            var start = Math.max(end, from.line);
            end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
            for (var j = start; j < end; ++j)
              { indentLine(this, j, how); }
            var newRanges = this.doc.sel.ranges;
            if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
              { replaceOneSelection(this.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll); }
          } else if (range.head.line > end) {
            indentLine(this, range.head.line, how, true);
            end = range.head.line;
            if (i == this.doc.sel.primIndex) { ensureCursorVisible(this); }
          }
        }
      }),

      // Fetch the parser token for a given character. Useful for hacks
      // that want to inspect the mode state (say, for completion).
      getTokenAt: function(pos, precise) {
        return takeToken(this, pos, precise)
      },

      getLineTokens: function(line, precise) {
        return takeToken(this, Pos(line), precise, true)
      },

      getTokenTypeAt: function(pos) {
        pos = clipPos(this.doc, pos);
        var styles = getLineStyles(this, getLine(this.doc, pos.line));
        var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
        var type;
        if (ch == 0) { type = styles[2]; }
        else { for (;;) {
          var mid = (before + after) >> 1;
          if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid; }
          else if (styles[mid * 2 + 1] < ch) { before = mid + 1; }
          else { type = styles[mid * 2 + 2]; break }
        } }
        var cut = type ? type.indexOf("overlay ") : -1;
        return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
      },

      getModeAt: function(pos) {
        var mode = this.doc.mode;
        if (!mode.innerMode) { return mode }
        return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
      },

      getHelper: function(pos, type) {
        return this.getHelpers(pos, type)[0]
      },

      getHelpers: function(pos, type) {
        var found = [];
        if (!helpers.hasOwnProperty(type)) { return found }
        var help = helpers[type], mode = this.getModeAt(pos);
        if (typeof mode[type] == "string") {
          if (help[mode[type]]) { found.push(help[mode[type]]); }
        } else if (mode[type]) {
          for (var i = 0; i < mode[type].length; i++) {
            var val = help[mode[type][i]];
            if (val) { found.push(val); }
          }
        } else if (mode.helperType && help[mode.helperType]) {
          found.push(help[mode.helperType]);
        } else if (help[mode.name]) {
          found.push(help[mode.name]);
        }
        for (var i$1 = 0; i$1 < help._global.length; i$1++) {
          var cur = help._global[i$1];
          if (cur.pred(mode, this) && indexOf(found, cur.val) == -1)
            { found.push(cur.val); }
        }
        return found
      },

      getStateAfter: function(line, precise) {
        var doc = this.doc;
        line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
        return getContextBefore(this, line + 1, precise).state
      },

      cursorCoords: function(start, mode) {
        var pos, range = this.doc.sel.primary();
        if (start == null) { pos = range.head; }
        else if (typeof start == "object") { pos = clipPos(this.doc, start); }
        else { pos = start ? range.from() : range.to(); }
        return cursorCoords(this, pos, mode || "page")
      },

      charCoords: function(pos, mode) {
        return charCoords(this, clipPos(this.doc, pos), mode || "page")
      },

      coordsChar: function(coords, mode) {
        coords = fromCoordSystem(this, coords, mode || "page");
        return coordsChar(this, coords.left, coords.top)
      },

      lineAtHeight: function(height, mode) {
        height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
        return lineAtHeight(this.doc, height + this.display.viewOffset)
      },
      heightAtLine: function(line, mode, includeWidgets) {
        var end = false, lineObj;
        if (typeof line == "number") {
          var last = this.doc.first + this.doc.size - 1;
          if (line < this.doc.first) { line = this.doc.first; }
          else if (line > last) { line = last; end = true; }
          lineObj = getLine(this.doc, line);
        } else {
          lineObj = line;
        }
        return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page", includeWidgets || end).top +
          (end ? this.doc.height - heightAtLine(lineObj) : 0)
      },

      defaultTextHeight: function() { return textHeight(this.display) },
      defaultCharWidth: function() { return charWidth(this.display) },

      getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},

      addWidget: function(pos, node, scroll, vert, horiz) {
        var display = this.display;
        pos = cursorCoords(this, clipPos(this.doc, pos));
        var top = pos.bottom, left = pos.left;
        node.style.position = "absolute";
        node.setAttribute("cm-ignore-events", "true");
        this.display.input.setUneditable(node);
        display.sizer.appendChild(node);
        if (vert == "over") {
          top = pos.top;
        } else if (vert == "above" || vert == "near") {
          var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
          hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
          // Default to positioning above (if specified and possible); otherwise default to positioning below
          if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
            { top = pos.top - node.offsetHeight; }
          else if (pos.bottom + node.offsetHeight <= vspace)
            { top = pos.bottom; }
          if (left + node.offsetWidth > hspace)
            { left = hspace - node.offsetWidth; }
        }
        node.style.top = top + "px";
        node.style.left = node.style.right = "";
        if (horiz == "right") {
          left = display.sizer.clientWidth - node.offsetWidth;
          node.style.right = "0px";
        } else {
          if (horiz == "left") { left = 0; }
          else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2; }
          node.style.left = left + "px";
        }
        if (scroll)
          { scrollIntoView(this, {left: left, top: top, right: left + node.offsetWidth, bottom: top + node.offsetHeight}); }
      },

      triggerOnKeyDown: methodOp(onKeyDown),
      triggerOnKeyPress: methodOp(onKeyPress),
      triggerOnKeyUp: onKeyUp,
      triggerOnMouseDown: methodOp(onMouseDown),

      execCommand: function(cmd) {
        if (commands.hasOwnProperty(cmd))
          { return commands[cmd].call(null, this) }
      },

      triggerElectric: methodOp(function(text) { triggerElectric(this, text); }),

      findPosH: function(from, amount, unit, visually) {
        var dir = 1;
        if (amount < 0) { dir = -1; amount = -amount; }
        var cur = clipPos(this.doc, from);
        for (var i = 0; i < amount; ++i) {
          cur = findPosH(this.doc, cur, dir, unit, visually);
          if (cur.hitSide) { break }
        }
        return cur
      },

      moveH: methodOp(function(dir, unit) {
        var this$1 = this;

        this.extendSelectionsBy(function (range) {
          if (this$1.display.shift || this$1.doc.extend || range.empty())
            { return findPosH(this$1.doc, range.head, dir, unit, this$1.options.rtlMoveVisually) }
          else
            { return dir < 0 ? range.from() : range.to() }
        }, sel_move);
      }),

      deleteH: methodOp(function(dir, unit) {
        var sel = this.doc.sel, doc = this.doc;
        if (sel.somethingSelected())
          { doc.replaceSelection("", null, "+delete"); }
        else
          { deleteNearSelection(this, function (range) {
            var other = findPosH(doc, range.head, dir, unit, false);
            return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other}
          }); }
      }),

      findPosV: function(from, amount, unit, goalColumn) {
        var dir = 1, x = goalColumn;
        if (amount < 0) { dir = -1; amount = -amount; }
        var cur = clipPos(this.doc, from);
        for (var i = 0; i < amount; ++i) {
          var coords = cursorCoords(this, cur, "div");
          if (x == null) { x = coords.left; }
          else { coords.left = x; }
          cur = findPosV(this, coords, dir, unit);
          if (cur.hitSide) { break }
        }
        return cur
      },

      moveV: methodOp(function(dir, unit) {
        var this$1 = this;

        var doc = this.doc, goals = [];
        var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected();
        doc.extendSelectionsBy(function (range) {
          if (collapse)
            { return dir < 0 ? range.from() : range.to() }
          var headPos = cursorCoords(this$1, range.head, "div");
          if (range.goalColumn != null) { headPos.left = range.goalColumn; }
          goals.push(headPos.left);
          var pos = findPosV(this$1, headPos, dir, unit);
          if (unit == "page" && range == doc.sel.primary())
            { addToScrollTop(this$1, charCoords(this$1, pos, "div").top - headPos.top); }
          return pos
        }, sel_move);
        if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
          { doc.sel.ranges[i].goalColumn = goals[i]; } }
      }),

      // Find the word at the given position (as returned by coordsChar).
      findWordAt: function(pos) {
        var doc = this.doc, line = getLine(doc, pos.line).text;
        var start = pos.ch, end = pos.ch;
        if (line) {
          var helper = this.getHelper(pos, "wordChars");
          if ((pos.sticky == "before" || end == line.length) && start) { --start; } else { ++end; }
          var startChar = line.charAt(start);
          var check = isWordChar(startChar, helper)
            ? function (ch) { return isWordChar(ch, helper); }
            : /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
            : function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); };
          while (start > 0 && check(line.charAt(start - 1))) { --start; }
          while (end < line.length && check(line.charAt(end))) { ++end; }
        }
        return new Range(Pos(pos.line, start), Pos(pos.line, end))
      },

      toggleOverwrite: function(value) {
        if (value != null && value == this.state.overwrite) { return }
        if (this.state.overwrite = !this.state.overwrite)
          { addClass(this.display.cursorDiv, "CodeMirror-overwrite"); }
        else
          { rmClass(this.display.cursorDiv, "CodeMirror-overwrite"); }

        signal(this, "overwriteToggle", this, this.state.overwrite);
      },
      hasFocus: function() { return this.display.input.getField() == activeElt(doc(this)) },
      isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },

      scrollTo: methodOp(function (x, y) { scrollToCoords(this, x, y); }),
      getScrollInfo: function() {
        var scroller = this.display.scroller;
        return {left: scroller.scrollLeft, top: scroller.scrollTop,
                height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
                width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
                clientHeight: displayHeight(this), clientWidth: displayWidth(this)}
      },

      scrollIntoView: methodOp(function(range, margin) {
        if (range == null) {
          range = {from: this.doc.sel.primary().head, to: null};
          if (margin == null) { margin = this.options.cursorScrollMargin; }
        } else if (typeof range == "number") {
          range = {from: Pos(range, 0), to: null};
        } else if (range.from == null) {
          range = {from: range, to: null};
        }
        if (!range.to) { range.to = range.from; }
        range.margin = margin || 0;

        if (range.from.line != null) {
          scrollToRange(this, range);
        } else {
          scrollToCoordsRange(this, range.from, range.to, range.margin);
        }
      }),

      setSize: methodOp(function(width, height) {
        var this$1 = this;

        var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; };
        if (width != null) { this.display.wrapper.style.width = interpret(width); }
        if (height != null) { this.display.wrapper.style.height = interpret(height); }
        if (this.options.lineWrapping) { clearLineMeasurementCache(this); }
        var lineNo = this.display.viewFrom;
        this.doc.iter(lineNo, this.display.viewTo, function (line) {
          if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
            { if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo, "widget"); break } } }
          ++lineNo;
        });
        this.curOp.forceUpdate = true;
        signal(this, "refresh", this);
      }),

      operation: function(f){return runInOp(this, f)},
      startOperation: function(){return startOperation(this)},
      endOperation: function(){return endOperation(this)},

      refresh: methodOp(function() {
        var oldHeight = this.display.cachedTextHeight;
        regChange(this);
        this.curOp.forceUpdate = true;
        clearCaches(this);
        scrollToCoords(this, this.doc.scrollLeft, this.doc.scrollTop);
        updateGutterSpace(this.display);
        if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5 || this.options.lineWrapping)
          { estimateLineHeights(this); }
        signal(this, "refresh", this);
      }),

      swapDoc: methodOp(function(doc) {
        var old = this.doc;
        old.cm = null;
        // Cancel the current text selection if any (#5821)
        if (this.state.selectingText) { this.state.selectingText(); }
        attachDoc(this, doc);
        clearCaches(this);
        this.display.input.reset();
        scrollToCoords(this, doc.scrollLeft, doc.scrollTop);
        this.curOp.forceScroll = true;
        signalLater(this, "swapDoc", this, old);
        return old
      }),

      phrase: function(phraseText) {
        var phrases = this.options.phrases;
        return phrases && Object.prototype.hasOwnProperty.call(phrases, phraseText) ? phrases[phraseText] : phraseText
      },

      getInputField: function(){return this.display.input.getField()},
      getWrapperElement: function(){return this.display.wrapper},
      getScrollerElement: function(){return this.display.scroller},
      getGutterElement: function(){return this.display.gutters}
    };
    eventMixin(CodeMirror);

    CodeMirror.registerHelper = function(type, name, value) {
      if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []}; }
      helpers[type][name] = value;
    };
    CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
      CodeMirror.registerHelper(type, name, value);
      helpers[type]._global.push({pred: predicate, val: value});
    };
  }

  // Used for horizontal relative motion. Dir is -1 or 1 (left or
  // right), unit can be "codepoint", "char", "column" (like char, but
  // doesn't cross line boundaries), "word" (across next word), or
  // "group" (to the start of next group of word or
  // non-word-non-whitespace chars). The visually param controls
  // whether, in right-to-left text, direction 1 means to move towards
  // the next index in the string, or towards the character to the right
  // of the current position. The resulting position will have a
  // hitSide=true property if it reached the end of the document.
  function findPosH(doc, pos, dir, unit, visually) {
    var oldPos = pos;
    var origDir = dir;
    var lineObj = getLine(doc, pos.line);
    var lineDir = visually && doc.direction == "rtl" ? -dir : dir;
    function findNextLine() {
      var l = pos.line + lineDir;
      if (l < doc.first || l >= doc.first + doc.size) { return false }
      pos = new Pos(l, pos.ch, pos.sticky);
      return lineObj = getLine(doc, l)
    }
    function moveOnce(boundToLine) {
      var next;
      if (unit == "codepoint") {
        var ch = lineObj.text.charCodeAt(pos.ch + (dir > 0 ? 0 : -1));
        if (isNaN(ch)) {
          next = null;
        } else {
          var astral = dir > 0 ? ch >= 0xD800 && ch < 0xDC00 : ch >= 0xDC00 && ch < 0xDFFF;
          next = new Pos(pos.line, Math.max(0, Math.min(lineObj.text.length, pos.ch + dir * (astral ? 2 : 1))), -dir);
        }
      } else if (visually) {
        next = moveVisually(doc.cm, lineObj, pos, dir);
      } else {
        next = moveLogically(lineObj, pos, dir);
      }
      if (next == null) {
        if (!boundToLine && findNextLine())
          { pos = endOfLine(visually, doc.cm, lineObj, pos.line, lineDir); }
        else
          { return false }
      } else {
        pos = next;
      }
      return true
    }

    if (unit == "char" || unit == "codepoint") {
      moveOnce();
    } else if (unit == "column") {
      moveOnce(true);
    } else if (unit == "word" || unit == "group") {
      var sawType = null, group = unit == "group";
      var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
      for (var first = true;; first = false) {
        if (dir < 0 && !moveOnce(!first)) { break }
        var cur = lineObj.text.charAt(pos.ch) || "\n";
        var type = isWordChar(cur, helper) ? "w"
          : group && cur == "\n" ? "n"
          : !group || /\s/.test(cur) ? null
          : "p";
        if (group && !first && !type) { type = "s"; }
        if (sawType && sawType != type) {
          if (dir < 0) {dir = 1; moveOnce(); pos.sticky = "after";}
          break
        }

        if (type) { sawType = type; }
        if (dir > 0 && !moveOnce(!first)) { break }
      }
    }
    var result = skipAtomic(doc, pos, oldPos, origDir, true);
    if (equalCursorPos(oldPos, result)) { result.hitSide = true; }
    return result
  }

  // For relative vertical movement. Dir may be -1 or 1. Unit can be
  // "page" or "line". The resulting position will have a hitSide=true
  // property if it reached the end of the document.
  function findPosV(cm, pos, dir, unit) {
    var doc = cm.doc, x = pos.left, y;
    if (unit == "page") {
      var pageSize = Math.min(cm.display.wrapper.clientHeight, win(cm).innerHeight || doc(cm).documentElement.clientHeight);
      var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3);
      y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount;

    } else if (unit == "line") {
      y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
    }
    var target;
    for (;;) {
      target = coordsChar(cm, x, y);
      if (!target.outside) { break }
      if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
      y += dir * 5;
    }
    return target
  }

  // CONTENTEDITABLE INPUT STYLE

  var ContentEditableInput = function(cm) {
    this.cm = cm;
    this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null;
    this.polling = new Delayed();
    this.composing = null;
    this.gracePeriod = false;
    this.readDOMTimeout = null;
  };

  ContentEditableInput.prototype.init = function (display) {
      var this$1 = this;

    var input = this, cm = input.cm;
    var div = input.div = display.lineDiv;
    div.contentEditable = true;
    disableBrowserMagic(div, cm.options.spellcheck, cm.options.autocorrect, cm.options.autocapitalize);

    function belongsToInput(e) {
      for (var t = e.target; t; t = t.parentNode) {
        if (t == div) { return true }
        if (/\bCodeMirror-(?:line)?widget\b/.test(t.className)) { break }
      }
      return false
    }

    on(div, "paste", function (e) {
      if (!belongsToInput(e) || signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
      // IE doesn't fire input events, so we schedule a read for the pasted content in this way
      if (ie_version <= 11) { setTimeout(operation(cm, function () { return this$1.updateFromDOM(); }), 20); }
    });

    on(div, "compositionstart", function (e) {
      this$1.composing = {data: e.data, done: false};
    });
    on(div, "compositionupdate", function (e) {
      if (!this$1.composing) { this$1.composing = {data: e.data, done: false}; }
    });
    on(div, "compositionend", function (e) {
      if (this$1.composing) {
        if (e.data != this$1.composing.data) { this$1.readFromDOMSoon(); }
        this$1.composing.done = true;
      }
    });

    on(div, "touchstart", function () { return input.forceCompositionEnd(); });

    on(div, "input", function () {
      if (!this$1.composing) { this$1.readFromDOMSoon(); }
    });

    function onCopyCut(e) {
      if (!belongsToInput(e) || signalDOMEvent(cm, e)) { return }
      if (cm.somethingSelected()) {
        setLastCopied({lineWise: false, text: cm.getSelections()});
        if (e.type == "cut") { cm.replaceSelection("", null, "cut"); }
      } else if (!cm.options.lineWiseCopyCut) {
        return
      } else {
        var ranges = copyableRanges(cm);
        setLastCopied({lineWise: true, text: ranges.text});
        if (e.type == "cut") {
          cm.operation(function () {
            cm.setSelections(ranges.ranges, 0, sel_dontScroll);
            cm.replaceSelection("", null, "cut");
          });
        }
      }
      if (e.clipboardData) {
        e.clipboardData.clearData();
        var content = lastCopied.text.join("\n");
        // iOS exposes the clipboard API, but seems to discard content inserted into it
        e.clipboardData.setData("Text", content);
        if (e.clipboardData.getData("Text") == content) {
          e.preventDefault();
          return
        }
      }
      // Old-fashioned briefly-focus-a-textarea hack
      var kludge = hiddenTextarea(), te = kludge.firstChild;
      disableBrowserMagic(te);
      cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild);
      te.value = lastCopied.text.join("\n");
      var hadFocus = activeElt(div.ownerDocument);
      selectInput(te);
      setTimeout(function () {
        cm.display.lineSpace.removeChild(kludge);
        hadFocus.focus();
        if (hadFocus == div) { input.showPrimarySelection(); }
      }, 50);
    }
    on(div, "copy", onCopyCut);
    on(div, "cut", onCopyCut);
  };

  ContentEditableInput.prototype.screenReaderLabelChanged = function (label) {
    // Label for screenreaders, accessibility
    if(label) {
      this.div.setAttribute('aria-label', label);
    } else {
      this.div.removeAttribute('aria-label');
    }
  };

  ContentEditableInput.prototype.prepareSelection = function () {
    var result = prepareSelection(this.cm, false);
    result.focus = activeElt(this.div.ownerDocument) == this.div;
    return result
  };

  ContentEditableInput.prototype.showSelection = function (info, takeFocus) {
    if (!info || !this.cm.display.view.length) { return }
    if (info.focus || takeFocus) { this.showPrimarySelection(); }
    this.showMultipleSelections(info);
  };

  ContentEditableInput.prototype.getSelection = function () {
    return this.cm.display.wrapper.ownerDocument.getSelection()
  };

  ContentEditableInput.prototype.showPrimarySelection = function () {
    var sel = this.getSelection(), cm = this.cm, prim = cm.doc.sel.primary();
    var from = prim.from(), to = prim.to();

    if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
      sel.removeAllRanges();
      return
    }

    var curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
    var curFocus = domToPos(cm, sel.focusNode, sel.focusOffset);
    if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
        cmp(minPos(curAnchor, curFocus), from) == 0 &&
        cmp(maxPos(curAnchor, curFocus), to) == 0)
      { return }

    var view = cm.display.view;
    var start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
        {node: view[0].measure.map[2], offset: 0};
    var end = to.line < cm.display.viewTo && posToDOM(cm, to);
    if (!end) {
      var measure = view[view.length - 1].measure;
      var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map;
      end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]};
    }

    if (!start || !end) {
      sel.removeAllRanges();
      return
    }

    var old = sel.rangeCount && sel.getRangeAt(0), rng;
    try { rng = range(start.node, start.offset, end.offset, end.node); }
    catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
    if (rng) {
      if (!gecko && cm.state.focused) {
        sel.collapse(start.node, start.offset);
        if (!rng.collapsed) {
          sel.removeAllRanges();
          sel.addRange(rng);
        }
      } else {
        sel.removeAllRanges();
        sel.addRange(rng);
      }
      if (old && sel.anchorNode == null) { sel.addRange(old); }
      else if (gecko) { this.startGracePeriod(); }
    }
    this.rememberSelection();
  };

  ContentEditableInput.prototype.startGracePeriod = function () {
      var this$1 = this;

    clearTimeout(this.gracePeriod);
    this.gracePeriod = setTimeout(function () {
      this$1.gracePeriod = false;
      if (this$1.selectionChanged())
        { this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }); }
    }, 20);
  };

  ContentEditableInput.prototype.showMultipleSelections = function (info) {
    removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors);
    removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection);
  };

  ContentEditableInput.prototype.rememberSelection = function () {
    var sel = this.getSelection();
    this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset;
    this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset;
  };

  ContentEditableInput.prototype.selectionInEditor = function () {
    var sel = this.getSelection();
    if (!sel.rangeCount) { return false }
    var node = sel.getRangeAt(0).commonAncestorContainer;
    return contains(this.div, node)
  };

  ContentEditableInput.prototype.focus = function () {
    if (this.cm.options.readOnly != "nocursor") {
      if (!this.selectionInEditor() || activeElt(this.div.ownerDocument) != this.div)
        { this.showSelection(this.prepareSelection(), true); }
      this.div.focus();
    }
  };
  ContentEditableInput.prototype.blur = function () { this.div.blur(); };
  ContentEditableInput.prototype.getField = function () { return this.div };

  ContentEditableInput.prototype.supportsTouch = function () { return true };

  ContentEditableInput.prototype.receivedFocus = function () {
      var this$1 = this;

    var input = this;
    if (this.selectionInEditor())
      { setTimeout(function () { return this$1.pollSelection(); }, 20); }
    else
      { runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }); }

    function poll() {
      if (input.cm.state.focused) {
        input.pollSelection();
        input.polling.set(input.cm.options.pollInterval, poll);
      }
    }
    this.polling.set(this.cm.options.pollInterval, poll);
  };

  ContentEditableInput.prototype.selectionChanged = function () {
    var sel = this.getSelection();
    return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
      sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
  };

  ContentEditableInput.prototype.pollSelection = function () {
    if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) { return }
    var sel = this.getSelection(), cm = this.cm;
    // On Android Chrome (version 56, at least), backspacing into an
    // uneditable block element will put the cursor in that element,
    // and then, because it's not editable, hide the virtual keyboard.
    // Because Android doesn't allow us to actually detect backspace
    // presses in a sane way, this code checks for when that happens
    // and simulates a backspace press in this case.
    if (android && chrome && this.cm.display.gutterSpecs.length && isInGutter(sel.anchorNode)) {
      this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs});
      this.blur();
      this.focus();
      return
    }
    if (this.composing) { return }
    this.rememberSelection();
    var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
    var head = domToPos(cm, sel.focusNode, sel.focusOffset);
    if (anchor && head) { runInOp(cm, function () {
      setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll);
      if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true; }
    }); }
  };

  ContentEditableInput.prototype.pollContent = function () {
    if (this.readDOMTimeout != null) {
      clearTimeout(this.readDOMTimeout);
      this.readDOMTimeout = null;
    }

    var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary();
    var from = sel.from(), to = sel.to();
    if (from.ch == 0 && from.line > cm.firstLine())
      { from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length); }
    if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
      { to = Pos(to.line + 1, 0); }
    if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }

    var fromIndex, fromLine, fromNode;
    if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
      fromLine = lineNo(display.view[0].line);
      fromNode = display.view[0].node;
    } else {
      fromLine = lineNo(display.view[fromIndex].line);
      fromNode = display.view[fromIndex - 1].node.nextSibling;
    }
    var toIndex = findViewIndex(cm, to.line);
    var toLine, toNode;
    if (toIndex == display.view.length - 1) {
      toLine = display.viewTo - 1;
      toNode = display.lineDiv.lastChild;
    } else {
      toLine = lineNo(display.view[toIndex + 1].line) - 1;
      toNode = display.view[toIndex + 1].node.previousSibling;
    }

    if (!fromNode) { return false }
    var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
    var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length));
    while (newText.length > 1 && oldText.length > 1) {
      if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; }
      else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++; }
      else { break }
    }

    var cutFront = 0, cutEnd = 0;
    var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length);
    while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
      { ++cutFront; }
    var newBot = lst(newText), oldBot = lst(oldText);
    var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
                             oldBot.length - (oldText.length == 1 ? cutFront : 0));
    while (cutEnd < maxCutEnd &&
           newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
      { ++cutEnd; }
    // Try to move start of change to start of selection if ambiguous
    if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
      while (cutFront && cutFront > from.ch &&
             newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
        cutFront--;
        cutEnd++;
      }
    }

    newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "");
    newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "");

    var chFrom = Pos(fromLine, cutFront);
    var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0);
    if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
      replaceRange(cm.doc, newText, chFrom, chTo, "+input");
      return true
    }
  };

  ContentEditableInput.prototype.ensurePolled = function () {
    this.forceCompositionEnd();
  };
  ContentEditableInput.prototype.reset = function () {
    this.forceCompositionEnd();
  };
  ContentEditableInput.prototype.forceCompositionEnd = function () {
    if (!this.composing) { return }
    clearTimeout(this.readDOMTimeout);
    this.composing = null;
    this.updateFromDOM();
    this.div.blur();
    this.div.focus();
  };
  ContentEditableInput.prototype.readFromDOMSoon = function () {
      var this$1 = this;

    if (this.readDOMTimeout != null) { return }
    this.readDOMTimeout = setTimeout(function () {
      this$1.readDOMTimeout = null;
      if (this$1.composing) {
        if (this$1.composing.done) { this$1.composing = null; }
        else { return }
      }
      this$1.updateFromDOM();
    }, 80);
  };

  ContentEditableInput.prototype.updateFromDOM = function () {
      var this$1 = this;

    if (this.cm.isReadOnly() || !this.pollContent())
      { runInOp(this.cm, function () { return regChange(this$1.cm); }); }
  };

  ContentEditableInput.prototype.setUneditable = function (node) {
    node.contentEditable = "false";
  };

  ContentEditableInput.prototype.onKeyPress = function (e) {
    if (e.charCode == 0 || this.composing) { return }
    e.preventDefault();
    if (!this.cm.isReadOnly())
      { operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0); }
  };

  ContentEditableInput.prototype.readOnlyChanged = function (val) {
    this.div.contentEditable = String(val != "nocursor");
  };

  ContentEditableInput.prototype.onContextMenu = function () {};
  ContentEditableInput.prototype.resetPosition = function () {};

  ContentEditableInput.prototype.needsContentAttribute = true;

  function posToDOM(cm, pos) {
    var view = findViewForLine(cm, pos.line);
    if (!view || view.hidden) { return null }
    var line = getLine(cm.doc, pos.line);
    var info = mapFromLineView(view, line, pos.line);

    var order = getOrder(line, cm.doc.direction), side = "left";
    if (order) {
      var partPos = getBidiPartAt(order, pos.ch);
      side = partPos % 2 ? "right" : "left";
    }
    var result = nodeAndOffsetInLineMap(info.map, pos.ch, side);
    result.offset = result.collapse == "right" ? result.end : result.start;
    return result
  }

  function isInGutter(node) {
    for (var scan = node; scan; scan = scan.parentNode)
      { if (/CodeMirror-gutter-wrapper/.test(scan.className)) { return true } }
    return false
  }

  function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }

  function domTextBetween(cm, from, to, fromLine, toLine) {
    var text = "", closing = false, lineSep = cm.doc.lineSeparator(), extraLinebreak = false;
    function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
    function close() {
      if (closing) {
        text += lineSep;
        if (extraLinebreak) { text += lineSep; }
        closing = extraLinebreak = false;
      }
    }
    function addText(str) {
      if (str) {
        close();
        text += str;
      }
    }
    function walk(node) {
      if (node.nodeType == 1) {
        var cmText = node.getAttribute("cm-text");
        if (cmText) {
          addText(cmText);
          return
        }
        var markerID = node.getAttribute("cm-marker"), range;
        if (markerID) {
          var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID));
          if (found.length && (range = found[0].find(0)))
            { addText(getBetween(cm.doc, range.from, range.to).join(lineSep)); }
          return
        }
        if (node.getAttribute("contenteditable") == "false") { return }
        var isBlock = /^(pre|div|p|li|table|br)$/i.test(node.nodeName);
        if (!/^br$/i.test(node.nodeName) && node.textContent.length == 0) { return }

        if (isBlock) { close(); }
        for (var i = 0; i < node.childNodes.length; i++)
          { walk(node.childNodes[i]); }

        if (/^(pre|p)$/i.test(node.nodeName)) { extraLinebreak = true; }
        if (isBlock) { closing = true; }
      } else if (node.nodeType == 3) {
        addText(node.nodeValue.replace(/\u200b/g, "").replace(/\u00a0/g, " "));
      }
    }
    for (;;) {
      walk(from);
      if (from == to) { break }
      from = from.nextSibling;
      extraLinebreak = false;
    }
    return text
  }

  function domToPos(cm, node, offset) {
    var lineNode;
    if (node == cm.display.lineDiv) {
      lineNode = cm.display.lineDiv.childNodes[offset];
      if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
      node = null; offset = 0;
    } else {
      for (lineNode = node;; lineNode = lineNode.parentNode) {
        if (!lineNode || lineNode == cm.display.lineDiv) { return null }
        if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
      }
    }
    for (var i = 0; i < cm.display.view.length; i++) {
      var lineView = cm.display.view[i];
      if (lineView.node == lineNode)
        { return locateNodeInLineView(lineView, node, offset) }
    }
  }

  function locateNodeInLineView(lineView, node, offset) {
    var wrapper = lineView.text.firstChild, bad = false;
    if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
    if (node == wrapper) {
      bad = true;
      node = wrapper.childNodes[offset];
      offset = 0;
      if (!node) {
        var line = lineView.rest ? lst(lineView.rest) : lineView.line;
        return badPos(Pos(lineNo(line), line.text.length), bad)
      }
    }

    var textNode = node.nodeType == 3 ? node : null, topNode = node;
    if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
      textNode = node.firstChild;
      if (offset) { offset = textNode.nodeValue.length; }
    }
    while (topNode.parentNode != wrapper) { topNode = topNode.parentNode; }
    var measure = lineView.measure, maps = measure.maps;

    function find(textNode, topNode, offset) {
      for (var i = -1; i < (maps ? maps.length : 0); i++) {
        var map = i < 0 ? measure.map : maps[i];
        for (var j = 0; j < map.length; j += 3) {
          var curNode = map[j + 2];
          if (curNode == textNode || curNode == topNode) {
            var line = lineNo(i < 0 ? lineView.line : lineView.rest[i]);
            var ch = map[j] + offset;
            if (offset < 0 || curNode != textNode) { ch = map[j + (offset ? 1 : 0)]; }
            return Pos(line, ch)
          }
        }
      }
    }
    var found = find(textNode, topNode, offset);
    if (found) { return badPos(found, bad) }

    // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
    for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
      found = find(after, after.firstChild, 0);
      if (found)
        { return badPos(Pos(found.line, found.ch - dist), bad) }
      else
        { dist += after.textContent.length; }
    }
    for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
      found = find(before, before.firstChild, -1);
      if (found)
        { return badPos(Pos(found.line, found.ch + dist$1), bad) }
      else
        { dist$1 += before.textContent.length; }
    }
  }

  // TEXTAREA INPUT STYLE

  var TextareaInput = function(cm) {
    this.cm = cm;
    // See input.poll and input.reset
    this.prevInput = "";

    // Flag that indicates whether we expect input to appear real soon
    // now (after some event like 'keypress' or 'input') and are
    // polling intensively.
    this.pollingFast = false;
    // Self-resetting timeout for the poller
    this.polling = new Delayed();
    // Used to work around IE issue with selection being forgotten when focus moves away from textarea
    this.hasSelection = false;
    this.composing = null;
    this.resetting = false;
  };

  TextareaInput.prototype.init = function (display) {
      var this$1 = this;

    var input = this, cm = this.cm;
    this.createField(display);
    var te = this.textarea;

    display.wrapper.insertBefore(this.wrapper, display.wrapper.firstChild);

    // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
    if (ios) { te.style.width = "0px"; }

    on(te, "input", function () {
      if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null; }
      input.poll();
    });

    on(te, "paste", function (e) {
      if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }

      cm.state.pasteIncoming = +new Date;
      input.fastPoll();
    });

    function prepareCopyCut(e) {
      if (signalDOMEvent(cm, e)) { return }
      if (cm.somethingSelected()) {
        setLastCopied({lineWise: false, text: cm.getSelections()});
      } else if (!cm.options.lineWiseCopyCut) {
        return
      } else {
        var ranges = copyableRanges(cm);
        setLastCopied({lineWise: true, text: ranges.text});
        if (e.type == "cut") {
          cm.setSelections(ranges.ranges, null, sel_dontScroll);
        } else {
          input.prevInput = "";
          te.value = ranges.text.join("\n");
          selectInput(te);
        }
      }
      if (e.type == "cut") { cm.state.cutIncoming = +new Date; }
    }
    on(te, "cut", prepareCopyCut);
    on(te, "copy", prepareCopyCut);

    on(display.scroller, "paste", function (e) {
      if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
      if (!te.dispatchEvent) {
        cm.state.pasteIncoming = +new Date;
        input.focus();
        return
      }

      // Pass the `paste` event to the textarea so it's handled by its event listener.
      var event = new Event("paste");
      event.clipboardData = e.clipboardData;
      te.dispatchEvent(event);
    });

    // Prevent normal selection in the editor (we handle our own)
    on(display.lineSpace, "selectstart", function (e) {
      if (!eventInWidget(display, e)) { e_preventDefault(e); }
    });

    on(te, "compositionstart", function () {
      var start = cm.getCursor("from");
      if (input.composing) { input.composing.range.clear(); }
      input.composing = {
        start: start,
        range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
      };
    });
    on(te, "compositionend", function () {
      if (input.composing) {
        input.poll();
        input.composing.range.clear();
        input.composing = null;
      }
    });
  };

  TextareaInput.prototype.createField = function (_display) {
    // Wraps and hides input textarea
    this.wrapper = hiddenTextarea();
    // The semihidden textarea that is focused when the editor is
    // focused, and receives input.
    this.textarea = this.wrapper.firstChild;
    var opts = this.cm.options;
    disableBrowserMagic(this.textarea, opts.spellcheck, opts.autocorrect, opts.autocapitalize);
  };

  TextareaInput.prototype.screenReaderLabelChanged = function (label) {
    // Label for screenreaders, accessibility
    if(label) {
      this.textarea.setAttribute('aria-label', label);
    } else {
      this.textarea.removeAttribute('aria-label');
    }
  };

  TextareaInput.prototype.prepareSelection = function () {
    // Redraw the selection and/or cursor
    var cm = this.cm, display = cm.display, doc = cm.doc;
    var result = prepareSelection(cm);

    // Move the hidden textarea near the cursor to prevent scrolling artifacts
    if (cm.options.moveInputWithCursor) {
      var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
      var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
      result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
                                          headPos.top + lineOff.top - wrapOff.top));
      result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
                                           headPos.left + lineOff.left - wrapOff.left));
    }

    return result
  };

  TextareaInput.prototype.showSelection = function (drawn) {
    var cm = this.cm, display = cm.display;
    removeChildrenAndAdd(display.cursorDiv, drawn.cursors);
    removeChildrenAndAdd(display.selectionDiv, drawn.selection);
    if (drawn.teTop != null) {
      this.wrapper.style.top = drawn.teTop + "px";
      this.wrapper.style.left = drawn.teLeft + "px";
    }
  };

  // Reset the input to correspond to the selection (or to be empty,
  // when not typing and nothing is selected)
  TextareaInput.prototype.reset = function (typing) {
    if (this.contextMenuPending || this.composing && typing) { return }
    var cm = this.cm;
    this.resetting = true;
    if (cm.somethingSelected()) {
      this.prevInput = "";
      var content = cm.getSelection();
      this.textarea.value = content;
      if (cm.state.focused) { selectInput(this.textarea); }
      if (ie && ie_version >= 9) { this.hasSelection = content; }
    } else if (!typing) {
      this.prevInput = this.textarea.value = "";
      if (ie && ie_version >= 9) { this.hasSelection = null; }
    }
    this.resetting = false;
  };

  TextareaInput.prototype.getField = function () { return this.textarea };

  TextareaInput.prototype.supportsTouch = function () { return false };

  TextareaInput.prototype.focus = function () {
    if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt(this.textarea.ownerDocument) != this.textarea)) {
      try { this.textarea.focus(); }
      catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
    }
  };

  TextareaInput.prototype.blur = function () { this.textarea.blur(); };

  TextareaInput.prototype.resetPosition = function () {
    this.wrapper.style.top = this.wrapper.style.left = 0;
  };

  TextareaInput.prototype.receivedFocus = function () { this.slowPoll(); };

  // Poll for input changes, using the normal rate of polling. This
  // runs as long as the editor is focused.
  TextareaInput.prototype.slowPoll = function () {
      var this$1 = this;

    if (this.pollingFast) { return }
    this.polling.set(this.cm.options.pollInterval, function () {
      this$1.poll();
      if (this$1.cm.state.focused) { this$1.slowPoll(); }
    });
  };

  // When an event has just come in that is likely to add or change
  // something in the input textarea, we poll faster, to ensure that
  // the change appears on the screen quickly.
  TextareaInput.prototype.fastPoll = function () {
    var missed = false, input = this;
    input.pollingFast = true;
    function p() {
      var changed = input.poll();
      if (!changed && !missed) {missed = true; input.polling.set(60, p);}
      else {input.pollingFast = false; input.slowPoll();}
    }
    input.polling.set(20, p);
  };

  // Read input from the textarea, and update the document to match.
  // When something is selected, it is present in the textarea, and
  // selected (unless it is huge, in which case a placeholder is
  // used). When nothing is selected, the cursor sits after previously
  // seen text (can be empty), which is stored in prevInput (we must
  // not reset the textarea when typing, because that breaks IME).
  TextareaInput.prototype.poll = function () {
      var this$1 = this;

    var cm = this.cm, input = this.textarea, prevInput = this.prevInput;
    // Since this is called a *lot*, try to bail out as cheaply as
    // possible when it is clear that nothing happened. hasSelection
    // will be the case when there is a lot of text in the textarea,
    // in which case reading its value would be expensive.
    if (this.contextMenuPending || this.resetting || !cm.state.focused ||
        (hasSelection(input) && !prevInput && !this.composing) ||
        cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
      { return false }

    var text = input.value;
    // If nothing changed, bail.
    if (text == prevInput && !cm.somethingSelected()) { return false }
    // Work around nonsensical selection resetting in IE9/10, and
    // inexplicable appearance of private area unicode characters on
    // some key combos in Mac (#2689).
    if (ie && ie_version >= 9 && this.hasSelection === text ||
        mac && /[\uf700-\uf7ff]/.test(text)) {
      cm.display.input.reset();
      return false
    }

    if (cm.doc.sel == cm.display.selForContextMenu) {
      var first = text.charCodeAt(0);
      if (first == 0x200b && !prevInput) { prevInput = "\u200b"; }
      if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
    }
    // Find the part of the input that is actually new
    var same = 0, l = Math.min(prevInput.length, text.length);
    while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) { ++same; }

    runInOp(cm, function () {
      applyTextInput(cm, text.slice(same), prevInput.length - same,
                     null, this$1.composing ? "*compose" : null);

      // Don't leave long text in the textarea, since it makes further polling slow
      if (text.length > 1000 || text.indexOf("\n") > -1) { input.value = this$1.prevInput = ""; }
      else { this$1.prevInput = text; }

      if (this$1.composing) {
        this$1.composing.range.clear();
        this$1.composing.range = cm.markText(this$1.composing.start, cm.getCursor("to"),
                                           {className: "CodeMirror-composing"});
      }
    });
    return true
  };

  TextareaInput.prototype.ensurePolled = function () {
    if (this.pollingFast && this.poll()) { this.pollingFast = false; }
  };

  TextareaInput.prototype.onKeyPress = function () {
    if (ie && ie_version >= 9) { this.hasSelection = null; }
    this.fastPoll();
  };

  TextareaInput.prototype.onContextMenu = function (e) {
    var input = this, cm = input.cm, display = cm.display, te = input.textarea;
    if (input.contextMenuPending) { input.contextMenuPending(); }
    var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
    if (!pos || presto) { return } // Opera is difficult.

    // Reset the current text selection only if the click is done outside of the selection
    // and 'resetSelectionOnContextMenu' option is true.
    var reset = cm.options.resetSelectionOnContextMenu;
    if (reset && cm.doc.sel.contains(pos) == -1)
      { operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll); }

    var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText;
    var wrapperBox = input.wrapper.offsetParent.getBoundingClientRect();
    input.wrapper.style.cssText = "position: static";
    te.style.cssText = "position: absolute; width: 30px; height: 30px;\n      top: " + (e.clientY - wrapperBox.top - 5) + "px; left: " + (e.clientX - wrapperBox.left - 5) + "px;\n      z-index: 1000; background: " + (ie ? "rgba(255, 255, 255, .05)" : "transparent") + ";\n      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
    var oldScrollY;
    if (webkit) { oldScrollY = te.ownerDocument.defaultView.scrollY; } // Work around Chrome issue (#2712)
    display.input.focus();
    if (webkit) { te.ownerDocument.defaultView.scrollTo(null, oldScrollY); }
    display.input.reset();
    // Adds "Select all" to context menu in FF
    if (!cm.somethingSelected()) { te.value = input.prevInput = " "; }
    input.contextMenuPending = rehide;
    display.selForContextMenu = cm.doc.sel;
    clearTimeout(display.detectingSelectAll);

    // Select-all will be greyed out if there's nothing to select, so
    // this adds a zero-width space so that we can later check whether
    // it got selected.
    function prepareSelectAllHack() {
      if (te.selectionStart != null) {
        var selected = cm.somethingSelected();
        var extval = "\u200b" + (selected ? te.value : "");
        te.value = "\u21da"; // Used to catch context-menu undo
        te.value = extval;
        input.prevInput = selected ? "" : "\u200b";
        te.selectionStart = 1; te.selectionEnd = extval.length;
        // Re-set this, in case some other handler touched the
        // selection in the meantime.
        display.selForContextMenu = cm.doc.sel;
      }
    }
    function rehide() {
      if (input.contextMenuPending != rehide) { return }
      input.contextMenuPending = false;
      input.wrapper.style.cssText = oldWrapperCSS;
      te.style.cssText = oldCSS;
      if (ie && ie_version < 9) { display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos); }

      // Try to detect the user choosing select-all
      if (te.selectionStart != null) {
        if (!ie || (ie && ie_version < 9)) { prepareSelectAllHack(); }
        var i = 0, poll = function () {
          if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
              te.selectionEnd > 0 && input.prevInput == "\u200b") {
            operation(cm, selectAll)(cm);
          } else if (i++ < 10) {
            display.detectingSelectAll = setTimeout(poll, 500);
          } else {
            display.selForContextMenu = null;
            display.input.reset();
          }
        };
        display.detectingSelectAll = setTimeout(poll, 200);
      }
    }

    if (ie && ie_version >= 9) { prepareSelectAllHack(); }
    if (captureRightClick) {
      e_stop(e);
      var mouseup = function () {
        off(window, "mouseup", mouseup);
        setTimeout(rehide, 20);
      };
      on(window, "mouseup", mouseup);
    } else {
      setTimeout(rehide, 50);
    }
  };

  TextareaInput.prototype.readOnlyChanged = function (val) {
    if (!val) { this.reset(); }
    this.textarea.disabled = val == "nocursor";
    this.textarea.readOnly = !!val;
  };

  TextareaInput.prototype.setUneditable = function () {};

  TextareaInput.prototype.needsContentAttribute = false;

  function fromTextArea(textarea, options) {
    options = options ? copyObj(options) : {};
    options.value = textarea.value;
    if (!options.tabindex && textarea.tabIndex)
      { options.tabindex = textarea.tabIndex; }
    if (!options.placeholder && textarea.placeholder)
      { options.placeholder = textarea.placeholder; }
    // Set autofocus to true if this textarea is focused, or if it has
    // autofocus and no other element is focused.
    if (options.autofocus == null) {
      var hasFocus = activeElt(textarea.ownerDocument);
      options.autofocus = hasFocus == textarea ||
        textarea.getAttribute("autofocus") != null && hasFocus == document.body;
    }

    function save() {textarea.value = cm.getValue();}

    var realSubmit;
    if (textarea.form) {
      on(textarea.form, "submit", save);
      // Deplorable hack to make the submit method do the right thing.
      if (!options.leaveSubmitMethodAlone) {
        var form = textarea.form;
        realSubmit = form.submit;
        try {
          var wrappedSubmit = form.submit = function () {
            save();
            form.submit = realSubmit;
            form.submit();
            form.submit = wrappedSubmit;
          };
        } catch(e) {}
      }
    }

    options.finishInit = function (cm) {
      cm.save = save;
      cm.getTextArea = function () { return textarea; };
      cm.toTextArea = function () {
        cm.toTextArea = isNaN; // Prevent this from being ran twice
        save();
        textarea.parentNode.removeChild(cm.getWrapperElement());
        textarea.style.display = "";
        if (textarea.form) {
          off(textarea.form, "submit", save);
          if (!options.leaveSubmitMethodAlone && typeof textarea.form.submit == "function")
            { textarea.form.submit = realSubmit; }
        }
      };
    };

    textarea.style.display = "none";
    var cm = CodeMirror(function (node) { return textarea.parentNode.insertBefore(node, textarea.nextSibling); },
      options);
    return cm
  }

  function addLegacyProps(CodeMirror) {
    CodeMirror.off = off;
    CodeMirror.on = on;
    CodeMirror.wheelEventPixels = wheelEventPixels;
    CodeMirror.Doc = Doc;
    CodeMirror.splitLines = splitLinesAuto;
    CodeMirror.countColumn = countColumn;
    CodeMirror.findColumn = findColumn;
    CodeMirror.isWordChar = isWordCharBasic;
    CodeMirror.Pass = Pass;
    CodeMirror.signal = signal;
    CodeMirror.Line = Line;
    CodeMirror.changeEnd = changeEnd;
    CodeMirror.scrollbarModel = scrollbarModel;
    CodeMirror.Pos = Pos;
    CodeMirror.cmpPos = cmp;
    CodeMirror.modes = modes;
    CodeMirror.mimeModes = mimeModes;
    CodeMirror.resolveMode = resolveMode;
    CodeMirror.getMode = getMode;
    CodeMirror.modeExtensions = modeExtensions;
    CodeMirror.extendMode = extendMode;
    CodeMirror.copyState = copyState;
    CodeMirror.startState = startState;
    CodeMirror.innerMode = innerMode;
    CodeMirror.commands = commands;
    CodeMirror.keyMap = keyMap;
    CodeMirror.keyName = keyName;
    CodeMirror.isModifierKey = isModifierKey;
    CodeMirror.lookupKey = lookupKey;
    CodeMirror.normalizeKeyMap = normalizeKeyMap;
    CodeMirror.StringStream = StringStream;
    CodeMirror.SharedTextMarker = SharedTextMarker;
    CodeMirror.TextMarker = TextMarker;
    CodeMirror.LineWidget = LineWidget;
    CodeMirror.e_preventDefault = e_preventDefault;
    CodeMirror.e_stopPropagation = e_stopPropagation;
    CodeMirror.e_stop = e_stop;
    CodeMirror.addClass = addClass;
    CodeMirror.contains = contains;
    CodeMirror.rmClass = rmClass;
    CodeMirror.keyNames = keyNames;
  }

  // EDITOR CONSTRUCTOR

  defineOptions(CodeMirror);

  addEditorMethods(CodeMirror);

  // Set up methods on CodeMirror's prototype to redirect to the editor's document.
  var dontDelegate = "iter insert remove copy getEditor constructor".split(" ");
  for (var prop in Doc.prototype) { if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
    { CodeMirror.prototype[prop] = (function(method) {
      return function() {return method.apply(this.doc, arguments)}
    })(Doc.prototype[prop]); } }

  eventMixin(Doc);
  CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput};

  // Extra arguments are stored as the mode's dependencies, which is
  // used by (legacy) mechanisms like loadmode.js to automatically
  // load a mode. (Preferred mechanism is the require/define calls.)
  CodeMirror.defineMode = function(name/*, mode, …*/) {
    if (!CodeMirror.defaults.mode && name != "null") { CodeMirror.defaults.mode = name; }
    defineMode.apply(this, arguments);
  };

  CodeMirror.defineMIME = defineMIME;

  // Minimal default mode.
  CodeMirror.defineMode("null", function () { return ({token: function (stream) { return stream.skipToEnd(); }}); });
  CodeMirror.defineMIME("text/plain", "null");

  // EXTENSIONS

  CodeMirror.defineExtension = function (name, func) {
    CodeMirror.prototype[name] = func;
  };
  CodeMirror.defineDocExtension = function (name, func) {
    Doc.prototype[name] = func;
  };

  CodeMirror.fromTextArea = fromTextArea;

  addLegacyProps(CodeMirror);

  CodeMirror.version = "5.65.11";

  return CodeMirror;

})));

},{}],4:[function(require,module,exports){
// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/5/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.defineMode("javascript", function(config, parserConfig) {
  var indentUnit = config.indentUnit;
  var statementIndent = parserConfig.statementIndent;
  var jsonldMode = parserConfig.jsonld;
  var jsonMode = parserConfig.json || jsonldMode;
  var trackScope = parserConfig.trackScope !== false
  var isTS = parserConfig.typescript;
  var wordRE = parserConfig.wordCharacters || /[\w$\xa1-\uffff]/;

  // Tokenizer

  var keywords = function(){
    function kw(type) {return {type: type, style: "keyword"};}
    var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c"), D = kw("keyword d");
    var operator = kw("operator"), atom = {type: "atom", style: "atom"};

    return {
      "if": kw("if"), "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B,
      "return": D, "break": D, "continue": D, "new": kw("new"), "delete": C, "void": C, "throw": C,
      "debugger": kw("debugger"), "var": kw("var"), "const": kw("var"), "let": kw("var"),
      "function": kw("function"), "catch": kw("catch"),
      "for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
      "in": operator, "typeof": operator, "instanceof": operator,
      "true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom,
      "this": kw("this"), "class": kw("class"), "super": kw("atom"),
      "yield": C, "export": kw("export"), "import": kw("import"), "extends": C,
      "await": C
    };
  }();

  var isOperatorChar = /[+\-*&%=<>!?|~^@]/;
  var isJsonldKeyword = /^@(context|id|value|language|type|container|list|set|reverse|index|base|vocab|graph)"/;

  function readRegexp(stream) {
    var escaped = false, next, inSet = false;
    while ((next = stream.next()) != null) {
      if (!escaped) {
        if (next == "/" && !inSet) return;
        if (next == "[") inSet = true;
        else if (inSet && next == "]") inSet = false;
      }
      escaped = !escaped && next == "\\";
    }
  }

  // Used as scratch variables to communicate multiple values without
  // consing up tons of objects.
  var type, content;
  function ret(tp, style, cont) {
    type = tp; content = cont;
    return style;
  }
  function tokenBase(stream, state) {
    var ch = stream.next();
    if (ch == '"' || ch == "'") {
      state.tokenize = tokenString(ch);
      return state.tokenize(stream, state);
    } else if (ch == "." && stream.match(/^\d[\d_]*(?:[eE][+\-]?[\d_]+)?/)) {
      return ret("number", "number");
    } else if (ch == "." && stream.match("..")) {
      return ret("spread", "meta");
    } else if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
      return ret(ch);
    } else if (ch == "=" && stream.eat(">")) {
      return ret("=>", "operator");
    } else if (ch == "0" && stream.match(/^(?:x[\dA-Fa-f_]+|o[0-7_]+|b[01_]+)n?/)) {
      return ret("number", "number");
    } else if (/\d/.test(ch)) {
      stream.match(/^[\d_]*(?:n|(?:\.[\d_]*)?(?:[eE][+\-]?[\d_]+)?)?/);
      return ret("number", "number");
    } else if (ch == "/") {
      if (stream.eat("*")) {
        state.tokenize = tokenComment;
        return tokenComment(stream, state);
      } else if (stream.eat("/")) {
        stream.skipToEnd();
        return ret("comment", "comment");
      } else if (expressionAllowed(stream, state, 1)) {
        readRegexp(stream);
        stream.match(/^\b(([gimyus])(?![gimyus]*\2))+\b/);
        return ret("regexp", "string-2");
      } else {
        stream.eat("=");
        return ret("operator", "operator", stream.current());
      }
    } else if (ch == "`") {
      state.tokenize = tokenQuasi;
      return tokenQuasi(stream, state);
    } else if (ch == "#" && stream.peek() == "!") {
      stream.skipToEnd();
      return ret("meta", "meta");
    } else if (ch == "#" && stream.eatWhile(wordRE)) {
      return ret("variable", "property")
    } else if (ch == "<" && stream.match("!--") ||
               (ch == "-" && stream.match("->") && !/\S/.test(stream.string.slice(0, stream.start)))) {
      stream.skipToEnd()
      return ret("comment", "comment")
    } else if (isOperatorChar.test(ch)) {
      if (ch != ">" || !state.lexical || state.lexical.type != ">") {
        if (stream.eat("=")) {
          if (ch == "!" || ch == "=") stream.eat("=")
        } else if (/[<>*+\-|&?]/.test(ch)) {
          stream.eat(ch)
          if (ch == ">") stream.eat(ch)
        }
      }
      if (ch == "?" && stream.eat(".")) return ret(".")
      return ret("operator", "operator", stream.current());
    } else if (wordRE.test(ch)) {
      stream.eatWhile(wordRE);
      var word = stream.current()
      if (state.lastType != ".") {
        if (keywords.propertyIsEnumerable(word)) {
          var kw = keywords[word]
          return ret(kw.type, kw.style, word)
        }
        if (word == "async" && stream.match(/^(\s|\/\*([^*]|\*(?!\/))*?\*\/)*[\[\(\w]/, false))
          return ret("async", "keyword", word)
      }
      return ret("variable", "variable", word)
    }
  }

  function tokenString(quote) {
    return function(stream, state) {
      var escaped = false, next;
      if (jsonldMode && stream.peek() == "@" && stream.match(isJsonldKeyword)){
        state.tokenize = tokenBase;
        return ret("jsonld-keyword", "meta");
      }
      while ((next = stream.next()) != null) {
        if (next == quote && !escaped) break;
        escaped = !escaped && next == "\\";
      }
      if (!escaped) state.tokenize = tokenBase;
      return ret("string", "string");
    };
  }

  function tokenComment(stream, state) {
    var maybeEnd = false, ch;
    while (ch = stream.next()) {
      if (ch == "/" && maybeEnd) {
        state.tokenize = tokenBase;
        break;
      }
      maybeEnd = (ch == "*");
    }
    return ret("comment", "comment");
  }

  function tokenQuasi(stream, state) {
    var escaped = false, next;
    while ((next = stream.next()) != null) {
      if (!escaped && (next == "`" || next == "$" && stream.eat("{"))) {
        state.tokenize = tokenBase;
        break;
      }
      escaped = !escaped && next == "\\";
    }
    return ret("quasi", "string-2", stream.current());
  }

  var brackets = "([{}])";
  // This is a crude lookahead trick to try and notice that we're
  // parsing the argument patterns for a fat-arrow function before we
  // actually hit the arrow token. It only works if the arrow is on
  // the same line as the arguments and there's no strange noise
  // (comments) in between. Fallback is to only notice when we hit the
  // arrow, and not declare the arguments as locals for the arrow
  // body.
  function findFatArrow(stream, state) {
    if (state.fatArrowAt) state.fatArrowAt = null;
    var arrow = stream.string.indexOf("=>", stream.start);
    if (arrow < 0) return;

    if (isTS) { // Try to skip TypeScript return type declarations after the arguments
      var m = /:\s*(?:\w+(?:<[^>]*>|\[\])?|\{[^}]*\})\s*$/.exec(stream.string.slice(stream.start, arrow))
      if (m) arrow = m.index
    }

    var depth = 0, sawSomething = false;
    for (var pos = arrow - 1; pos >= 0; --pos) {
      var ch = stream.string.charAt(pos);
      var bracket = brackets.indexOf(ch);
      if (bracket >= 0 && bracket < 3) {
        if (!depth) { ++pos; break; }
        if (--depth == 0) { if (ch == "(") sawSomething = true; break; }
      } else if (bracket >= 3 && bracket < 6) {
        ++depth;
      } else if (wordRE.test(ch)) {
        sawSomething = true;
      } else if (/["'\/`]/.test(ch)) {
        for (;; --pos) {
          if (pos == 0) return
          var next = stream.string.charAt(pos - 1)
          if (next == ch && stream.string.charAt(pos - 2) != "\\") { pos--; break }
        }
      } else if (sawSomething && !depth) {
        ++pos;
        break;
      }
    }
    if (sawSomething && !depth) state.fatArrowAt = pos;
  }

  // Parser

  var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true,
                     "regexp": true, "this": true, "import": true, "jsonld-keyword": true};

  function JSLexical(indented, column, type, align, prev, info) {
    this.indented = indented;
    this.column = column;
    this.type = type;
    this.prev = prev;
    this.info = info;
    if (align != null) this.align = align;
  }

  function inScope(state, varname) {
    if (!trackScope) return false
    for (var v = state.localVars; v; v = v.next)
      if (v.name == varname) return true;
    for (var cx = state.context; cx; cx = cx.prev) {
      for (var v = cx.vars; v; v = v.next)
        if (v.name == varname) return true;
    }
  }

  function parseJS(state, style, type, content, stream) {
    var cc = state.cc;
    // Communicate our context to the combinators.
    // (Less wasteful than consing up a hundred closures on every call.)
    cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc; cx.style = style;

    if (!state.lexical.hasOwnProperty("align"))
      state.lexical.align = true;

    while(true) {
      var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement;
      if (combinator(type, content)) {
        while(cc.length && cc[cc.length - 1].lex)
          cc.pop()();
        if (cx.marked) return cx.marked;
        if (type == "variable" && inScope(state, content)) return "variable-2";
        return style;
      }
    }
  }

  // Combinator utils

  var cx = {state: null, column: null, marked: null, cc: null};
  function pass() {
    for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
  }
  function cont() {
    pass.apply(null, arguments);
    return true;
  }
  function inList(name, list) {
    for (var v = list; v; v = v.next) if (v.name == name) return true
    return false;
  }
  function register(varname) {
    var state = cx.state;
    cx.marked = "def";
    if (!trackScope) return
    if (state.context) {
      if (state.lexical.info == "var" && state.context && state.context.block) {
        // FIXME function decls are also not block scoped
        var newContext = registerVarScoped(varname, state.context)
        if (newContext != null) {
          state.context = newContext
          return
        }
      } else if (!inList(varname, state.localVars)) {
        state.localVars = new Var(varname, state.localVars)
        return
      }
    }
    // Fall through means this is global
    if (parserConfig.globalVars && !inList(varname, state.globalVars))
      state.globalVars = new Var(varname, state.globalVars)
  }
  function registerVarScoped(varname, context) {
    if (!context) {
      return null
    } else if (context.block) {
      var inner = registerVarScoped(varname, context.prev)
      if (!inner) return null
      if (inner == context.prev) return context
      return new Context(inner, context.vars, true)
    } else if (inList(varname, context.vars)) {
      return context
    } else {
      return new Context(context.prev, new Var(varname, context.vars), false)
    }
  }

  function isModifier(name) {
    return name == "public" || name == "private" || name == "protected" || name == "abstract" || name == "readonly"
  }

  // Combinators

  function Context(prev, vars, block) { this.prev = prev; this.vars = vars; this.block = block }
  function Var(name, next) { this.name = name; this.next = next }

  var defaultVars = new Var("this", new Var("arguments", null))
  function pushcontext() {
    cx.state.context = new Context(cx.state.context, cx.state.localVars, false)
    cx.state.localVars = defaultVars
  }
  function pushblockcontext() {
    cx.state.context = new Context(cx.state.context, cx.state.localVars, true)
    cx.state.localVars = null
  }
  pushcontext.lex = pushblockcontext.lex = true
  function popcontext() {
    cx.state.localVars = cx.state.context.vars
    cx.state.context = cx.state.context.prev
  }
  popcontext.lex = true
  function pushlex(type, info) {
    var result = function() {
      var state = cx.state, indent = state.indented;
      if (state.lexical.type == "stat") indent = state.lexical.indented;
      else for (var outer = state.lexical; outer && outer.type == ")" && outer.align; outer = outer.prev)
        indent = outer.indented;
      state.lexical = new JSLexical(indent, cx.stream.column(), type, null, state.lexical, info);
    };
    result.lex = true;
    return result;
  }
  function poplex() {
    var state = cx.state;
    if (state.lexical.prev) {
      if (state.lexical.type == ")")
        state.indented = state.lexical.indented;
      state.lexical = state.lexical.prev;
    }
  }
  poplex.lex = true;

  function expect(wanted) {
    function exp(type) {
      if (type == wanted) return cont();
      else if (wanted == ";" || type == "}" || type == ")" || type == "]") return pass();
      else return cont(exp);
    };
    return exp;
  }

  function statement(type, value) {
    if (type == "var") return cont(pushlex("vardef", value), vardef, expect(";"), poplex);
    if (type == "keyword a") return cont(pushlex("form"), parenExpr, statement, poplex);
    if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
    if (type == "keyword d") return cx.stream.match(/^\s*$/, false) ? cont() : cont(pushlex("stat"), maybeexpression, expect(";"), poplex);
    if (type == "debugger") return cont(expect(";"));
    if (type == "{") return cont(pushlex("}"), pushblockcontext, block, poplex, popcontext);
    if (type == ";") return cont();
    if (type == "if") {
      if (cx.state.lexical.info == "else" && cx.state.cc[cx.state.cc.length - 1] == poplex)
        cx.state.cc.pop()();
      return cont(pushlex("form"), parenExpr, statement, poplex, maybeelse);
    }
    if (type == "function") return cont(functiondef);
    if (type == "for") return cont(pushlex("form"), pushblockcontext, forspec, statement, popcontext, poplex);
    if (type == "class" || (isTS && value == "interface")) {
      cx.marked = "keyword"
      return cont(pushlex("form", type == "class" ? type : value), className, poplex)
    }
    if (type == "variable") {
      if (isTS && value == "declare") {
        cx.marked = "keyword"
        return cont(statement)
      } else if (isTS && (value == "module" || value == "enum" || value == "type") && cx.stream.match(/^\s*\w/, false)) {
        cx.marked = "keyword"
        if (value == "enum") return cont(enumdef);
        else if (value == "type") return cont(typename, expect("operator"), typeexpr, expect(";"));
        else return cont(pushlex("form"), pattern, expect("{"), pushlex("}"), block, poplex, poplex)
      } else if (isTS && value == "namespace") {
        cx.marked = "keyword"
        return cont(pushlex("form"), expression, statement, poplex)
      } else if (isTS && value == "abstract") {
        cx.marked = "keyword"
        return cont(statement)
      } else {
        return cont(pushlex("stat"), maybelabel);
      }
    }
    if (type == "switch") return cont(pushlex("form"), parenExpr, expect("{"), pushlex("}", "switch"), pushblockcontext,
                                      block, poplex, poplex, popcontext);
    if (type == "case") return cont(expression, expect(":"));
    if (type == "default") return cont(expect(":"));
    if (type == "catch") return cont(pushlex("form"), pushcontext, maybeCatchBinding, statement, poplex, popcontext);
    if (type == "export") return cont(pushlex("stat"), afterExport, poplex);
    if (type == "import") return cont(pushlex("stat"), afterImport, poplex);
    if (type == "async") return cont(statement)
    if (value == "@") return cont(expression, statement)
    return pass(pushlex("stat"), expression, expect(";"), poplex);
  }
  function maybeCatchBinding(type) {
    if (type == "(") return cont(funarg, expect(")"))
  }
  function expression(type, value) {
    return expressionInner(type, value, false);
  }
  function expressionNoComma(type, value) {
    return expressionInner(type, value, true);
  }
  function parenExpr(type) {
    if (type != "(") return pass()
    return cont(pushlex(")"), maybeexpression, expect(")"), poplex)
  }
  function expressionInner(type, value, noComma) {
    if (cx.state.fatArrowAt == cx.stream.start) {
      var body = noComma ? arrowBodyNoComma : arrowBody;
      if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, expect("=>"), body, popcontext);
      else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext);
    }

    var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma;
    if (atomicTypes.hasOwnProperty(type)) return cont(maybeop);
    if (type == "function") return cont(functiondef, maybeop);
    if (type == "class" || (isTS && value == "interface")) { cx.marked = "keyword"; return cont(pushlex("form"), classExpression, poplex); }
    if (type == "keyword c" || type == "async") return cont(noComma ? expressionNoComma : expression);
    if (type == "(") return cont(pushlex(")"), maybeexpression, expect(")"), poplex, maybeop);
    if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression);
    if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop);
    if (type == "{") return contCommasep(objprop, "}", null, maybeop);
    if (type == "quasi") return pass(quasi, maybeop);
    if (type == "new") return cont(maybeTarget(noComma));
    return cont();
  }
  function maybeexpression(type) {
    if (type.match(/[;\}\)\],]/)) return pass();
    return pass(expression);
  }

  function maybeoperatorComma(type, value) {
    if (type == ",") return cont(maybeexpression);
    return maybeoperatorNoComma(type, value, false);
  }
  function maybeoperatorNoComma(type, value, noComma) {
    var me = noComma == false ? maybeoperatorComma : maybeoperatorNoComma;
    var expr = noComma == false ? expression : expressionNoComma;
    if (type == "=>") return cont(pushcontext, noComma ? arrowBodyNoComma : arrowBody, popcontext);
    if (type == "operator") {
      if (/\+\+|--/.test(value) || isTS && value == "!") return cont(me);
      if (isTS && value == "<" && cx.stream.match(/^([^<>]|<[^<>]*>)*>\s*\(/, false))
        return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, me);
      if (value == "?") return cont(expression, expect(":"), expr);
      return cont(expr);
    }
    if (type == "quasi") { return pass(quasi, me); }
    if (type == ";") return;
    if (type == "(") return contCommasep(expressionNoComma, ")", "call", me);
    if (type == ".") return cont(property, me);
    if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me);
    if (isTS && value == "as") { cx.marked = "keyword"; return cont(typeexpr, me) }
    if (type == "regexp") {
      cx.state.lastType = cx.marked = "operator"
      cx.stream.backUp(cx.stream.pos - cx.stream.start - 1)
      return cont(expr)
    }
  }
  function quasi(type, value) {
    if (type != "quasi") return pass();
    if (value.slice(value.length - 2) != "${") return cont(quasi);
    return cont(maybeexpression, continueQuasi);
  }
  function continueQuasi(type) {
    if (type == "}") {
      cx.marked = "string-2";
      cx.state.tokenize = tokenQuasi;
      return cont(quasi);
    }
  }
  function arrowBody(type) {
    findFatArrow(cx.stream, cx.state);
    return pass(type == "{" ? statement : expression);
  }
  function arrowBodyNoComma(type) {
    findFatArrow(cx.stream, cx.state);
    return pass(type == "{" ? statement : expressionNoComma);
  }
  function maybeTarget(noComma) {
    return function(type) {
      if (type == ".") return cont(noComma ? targetNoComma : target);
      else if (type == "variable" && isTS) return cont(maybeTypeArgs, noComma ? maybeoperatorNoComma : maybeoperatorComma)
      else return pass(noComma ? expressionNoComma : expression);
    };
  }
  function target(_, value) {
    if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorComma); }
  }
  function targetNoComma(_, value) {
    if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorNoComma); }
  }
  function maybelabel(type) {
    if (type == ":") return cont(poplex, statement);
    return pass(maybeoperatorComma, expect(";"), poplex);
  }
  function property(type) {
    if (type == "variable") {cx.marked = "property"; return cont();}
  }
  function objprop(type, value) {
    if (type == "async") {
      cx.marked = "property";
      return cont(objprop);
    } else if (type == "variable" || cx.style == "keyword") {
      cx.marked = "property";
      if (value == "get" || value == "set") return cont(getterSetter);
      var m // Work around fat-arrow-detection complication for detecting typescript typed arrow params
      if (isTS && cx.state.fatArrowAt == cx.stream.start && (m = cx.stream.match(/^\s*:\s*/, false)))
        cx.state.fatArrowAt = cx.stream.pos + m[0].length
      return cont(afterprop);
    } else if (type == "number" || type == "string") {
      cx.marked = jsonldMode ? "property" : (cx.style + " property");
      return cont(afterprop);
    } else if (type == "jsonld-keyword") {
      return cont(afterprop);
    } else if (isTS && isModifier(value)) {
      cx.marked = "keyword"
      return cont(objprop)
    } else if (type == "[") {
      return cont(expression, maybetype, expect("]"), afterprop);
    } else if (type == "spread") {
      return cont(expressionNoComma, afterprop);
    } else if (value == "*") {
      cx.marked = "keyword";
      return cont(objprop);
    } else if (type == ":") {
      return pass(afterprop)
    }
  }
  function getterSetter(type) {
    if (type != "variable") return pass(afterprop);
    cx.marked = "property";
    return cont(functiondef);
  }
  function afterprop(type) {
    if (type == ":") return cont(expressionNoComma);
    if (type == "(") return pass(functiondef);
  }
  function commasep(what, end, sep) {
    function proceed(type, value) {
      if (sep ? sep.indexOf(type) > -1 : type == ",") {
        var lex = cx.state.lexical;
        if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
        return cont(function(type, value) {
          if (type == end || value == end) return pass()
          return pass(what)
        }, proceed);
      }
      if (type == end || value == end) return cont();
      if (sep && sep.indexOf(";") > -1) return pass(what)
      return cont(expect(end));
    }
    return function(type, value) {
      if (type == end || value == end) return cont();
      return pass(what, proceed);
    };
  }
  function contCommasep(what, end, info) {
    for (var i = 3; i < arguments.length; i++)
      cx.cc.push(arguments[i]);
    return cont(pushlex(end, info), commasep(what, end), poplex);
  }
  function block(type) {
    if (type == "}") return cont();
    return pass(statement, block);
  }
  function maybetype(type, value) {
    if (isTS) {
      if (type == ":") return cont(typeexpr);
      if (value == "?") return cont(maybetype);
    }
  }
  function maybetypeOrIn(type, value) {
    if (isTS && (type == ":" || value == "in")) return cont(typeexpr)
  }
  function mayberettype(type) {
    if (isTS && type == ":") {
      if (cx.stream.match(/^\s*\w+\s+is\b/, false)) return cont(expression, isKW, typeexpr)
      else return cont(typeexpr)
    }
  }
  function isKW(_, value) {
    if (value == "is") {
      cx.marked = "keyword"
      return cont()
    }
  }
  function typeexpr(type, value) {
    if (value == "keyof" || value == "typeof" || value == "infer" || value == "readonly") {
      cx.marked = "keyword"
      return cont(value == "typeof" ? expressionNoComma : typeexpr)
    }
    if (type == "variable" || value == "void") {
      cx.marked = "type"
      return cont(afterType)
    }
    if (value == "|" || value == "&") return cont(typeexpr)
    if (type == "string" || type == "number" || type == "atom") return cont(afterType);
    if (type == "[") return cont(pushlex("]"), commasep(typeexpr, "]", ","), poplex, afterType)
    if (type == "{") return cont(pushlex("}"), typeprops, poplex, afterType)
    if (type == "(") return cont(commasep(typearg, ")"), maybeReturnType, afterType)
    if (type == "<") return cont(commasep(typeexpr, ">"), typeexpr)
    if (type == "quasi") { return pass(quasiType, afterType); }
  }
  function maybeReturnType(type) {
    if (type == "=>") return cont(typeexpr)
  }
  function typeprops(type) {
    if (type.match(/[\}\)\]]/)) return cont()
    if (type == "," || type == ";") return cont(typeprops)
    return pass(typeprop, typeprops)
  }
  function typeprop(type, value) {
    if (type == "variable" || cx.style == "keyword") {
      cx.marked = "property"
      return cont(typeprop)
    } else if (value == "?" || type == "number" || type == "string") {
      return cont(typeprop)
    } else if (type == ":") {
      return cont(typeexpr)
    } else if (type == "[") {
      return cont(expect("variable"), maybetypeOrIn, expect("]"), typeprop)
    } else if (type == "(") {
      return pass(functiondecl, typeprop)
    } else if (!type.match(/[;\}\)\],]/)) {
      return cont()
    }
  }
  function quasiType(type, value) {
    if (type != "quasi") return pass();
    if (value.slice(value.length - 2) != "${") return cont(quasiType);
    return cont(typeexpr, continueQuasiType);
  }
  function continueQuasiType(type) {
    if (type == "}") {
      cx.marked = "string-2";
      cx.state.tokenize = tokenQuasi;
      return cont(quasiType);
    }
  }
  function typearg(type, value) {
    if (type == "variable" && cx.stream.match(/^\s*[?:]/, false) || value == "?") return cont(typearg)
    if (type == ":") return cont(typeexpr)
    if (type == "spread") return cont(typearg)
    return pass(typeexpr)
  }
  function afterType(type, value) {
    if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
    if (value == "|" || type == "." || value == "&") return cont(typeexpr)
    if (type == "[") return cont(typeexpr, expect("]"), afterType)
    if (value == "extends" || value == "implements") { cx.marked = "keyword"; return cont(typeexpr) }
    if (value == "?") return cont(typeexpr, expect(":"), typeexpr)
  }
  function maybeTypeArgs(_, value) {
    if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
  }
  function typeparam() {
    return pass(typeexpr, maybeTypeDefault)
  }
  function maybeTypeDefault(_, value) {
    if (value == "=") return cont(typeexpr)
  }
  function vardef(_, value) {
    if (value == "enum") {cx.marked = "keyword"; return cont(enumdef)}
    return pass(pattern, maybetype, maybeAssign, vardefCont);
  }
  function pattern(type, value) {
    if (isTS && isModifier(value)) { cx.marked = "keyword"; return cont(pattern) }
    if (type == "variable") { register(value); return cont(); }
    if (type == "spread") return cont(pattern);
    if (type == "[") return contCommasep(eltpattern, "]");
    if (type == "{") return contCommasep(proppattern, "}");
  }
  function proppattern(type, value) {
    if (type == "variable" && !cx.stream.match(/^\s*:/, false)) {
      register(value);
      return cont(maybeAssign);
    }
    if (type == "variable") cx.marked = "property";
    if (type == "spread") return cont(pattern);
    if (type == "}") return pass();
    if (type == "[") return cont(expression, expect(']'), expect(':'), proppattern);
    return cont(expect(":"), pattern, maybeAssign);
  }
  function eltpattern() {
    return pass(pattern, maybeAssign)
  }
  function maybeAssign(_type, value) {
    if (value == "=") return cont(expressionNoComma);
  }
  function vardefCont(type) {
    if (type == ",") return cont(vardef);
  }
  function maybeelse(type, value) {
    if (type == "keyword b" && value == "else") return cont(pushlex("form", "else"), statement, poplex);
  }
  function forspec(type, value) {
    if (value == "await") return cont(forspec);
    if (type == "(") return cont(pushlex(")"), forspec1, poplex);
  }
  function forspec1(type) {
    if (type == "var") return cont(vardef, forspec2);
    if (type == "variable") return cont(forspec2);
    return pass(forspec2)
  }
  function forspec2(type, value) {
    if (type == ")") return cont()
    if (type == ";") return cont(forspec2)
    if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression, forspec2) }
    return pass(expression, forspec2)
  }
  function functiondef(type, value) {
    if (value == "*") {cx.marked = "keyword"; return cont(functiondef);}
    if (type == "variable") {register(value); return cont(functiondef);}
    if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, mayberettype, statement, popcontext);
    if (isTS && value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, functiondef)
  }
  function functiondecl(type, value) {
    if (value == "*") {cx.marked = "keyword"; return cont(functiondecl);}
    if (type == "variable") {register(value); return cont(functiondecl);}
    if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, mayberettype, popcontext);
    if (isTS && value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, functiondecl)
  }
  function typename(type, value) {
    if (type == "keyword" || type == "variable") {
      cx.marked = "type"
      return cont(typename)
    } else if (value == "<") {
      return cont(pushlex(">"), commasep(typeparam, ">"), poplex)
    }
  }
  function funarg(type, value) {
    if (value == "@") cont(expression, funarg)
    if (type == "spread") return cont(funarg);
    if (isTS && isModifier(value)) { cx.marked = "keyword"; return cont(funarg); }
    if (isTS && type == "this") return cont(maybetype, maybeAssign)
    return pass(pattern, maybetype, maybeAssign);
  }
  function classExpression(type, value) {
    // Class expressions may have an optional name.
    if (type == "variable") return className(type, value);
    return classNameAfter(type, value);
  }
  function className(type, value) {
    if (type == "variable") {register(value); return cont(classNameAfter);}
  }
  function classNameAfter(type, value) {
    if (value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, classNameAfter)
    if (value == "extends" || value == "implements" || (isTS && type == ",")) {
      if (value == "implements") cx.marked = "keyword";
      return cont(isTS ? typeexpr : expression, classNameAfter);
    }
    if (type == "{") return cont(pushlex("}"), classBody, poplex);
  }
  function classBody(type, value) {
    if (type == "async" ||
        (type == "variable" &&
         (value == "static" || value == "get" || value == "set" || (isTS && isModifier(value))) &&
         cx.stream.match(/^\s+#?[\w$\xa1-\uffff]/, false))) {
      cx.marked = "keyword";
      return cont(classBody);
    }
    if (type == "variable" || cx.style == "keyword") {
      cx.marked = "property";
      return cont(classfield, classBody);
    }
    if (type == "number" || type == "string") return cont(classfield, classBody);
    if (type == "[")
      return cont(expression, maybetype, expect("]"), classfield, classBody)
    if (value == "*") {
      cx.marked = "keyword";
      return cont(classBody);
    }
    if (isTS && type == "(") return pass(functiondecl, classBody)
    if (type == ";" || type == ",") return cont(classBody);
    if (type == "}") return cont();
    if (value == "@") return cont(expression, classBody)
  }
  function classfield(type, value) {
    if (value == "!") return cont(classfield)
    if (value == "?") return cont(classfield)
    if (type == ":") return cont(typeexpr, maybeAssign)
    if (value == "=") return cont(expressionNoComma)
    var context = cx.state.lexical.prev, isInterface = context && context.info == "interface"
    return pass(isInterface ? functiondecl : functiondef)
  }
  function afterExport(type, value) {
    if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); }
    if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); }
    if (type == "{") return cont(commasep(exportField, "}"), maybeFrom, expect(";"));
    return pass(statement);
  }
  function exportField(type, value) {
    if (value == "as") { cx.marked = "keyword"; return cont(expect("variable")); }
    if (type == "variable") return pass(expressionNoComma, exportField);
  }
  function afterImport(type) {
    if (type == "string") return cont();
    if (type == "(") return pass(expression);
    if (type == ".") return pass(maybeoperatorComma);
    return pass(importSpec, maybeMoreImports, maybeFrom);
  }
  function importSpec(type, value) {
    if (type == "{") return contCommasep(importSpec, "}");
    if (type == "variable") register(value);
    if (value == "*") cx.marked = "keyword";
    return cont(maybeAs);
  }
  function maybeMoreImports(type) {
    if (type == ",") return cont(importSpec, maybeMoreImports)
  }
  function maybeAs(_type, value) {
    if (value == "as") { cx.marked = "keyword"; return cont(importSpec); }
  }
  function maybeFrom(_type, value) {
    if (value == "from") { cx.marked = "keyword"; return cont(expression); }
  }
  function arrayLiteral(type) {
    if (type == "]") return cont();
    return pass(commasep(expressionNoComma, "]"));
  }
  function enumdef() {
    return pass(pushlex("form"), pattern, expect("{"), pushlex("}"), commasep(enummember, "}"), poplex, poplex)
  }
  function enummember() {
    return pass(pattern, maybeAssign);
  }

  function isContinuedStatement(state, textAfter) {
    return state.lastType == "operator" || state.lastType == "," ||
      isOperatorChar.test(textAfter.charAt(0)) ||
      /[,.]/.test(textAfter.charAt(0));
  }

  function expressionAllowed(stream, state, backUp) {
    return state.tokenize == tokenBase &&
      /^(?:operator|sof|keyword [bcd]|case|new|export|default|spread|[\[{}\(,;:]|=>)$/.test(state.lastType) ||
      (state.lastType == "quasi" && /\{\s*$/.test(stream.string.slice(0, stream.pos - (backUp || 0))))
  }

  // Interface

  return {
    startState: function(basecolumn) {
      var state = {
        tokenize: tokenBase,
        lastType: "sof",
        cc: [],
        lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false),
        localVars: parserConfig.localVars,
        context: parserConfig.localVars && new Context(null, null, false),
        indented: basecolumn || 0
      };
      if (parserConfig.globalVars && typeof parserConfig.globalVars == "object")
        state.globalVars = parserConfig.globalVars;
      return state;
    },

    token: function(stream, state) {
      if (stream.sol()) {
        if (!state.lexical.hasOwnProperty("align"))
          state.lexical.align = false;
        state.indented = stream.indentation();
        findFatArrow(stream, state);
      }
      if (state.tokenize != tokenComment && stream.eatSpace()) return null;
      var style = state.tokenize(stream, state);
      if (type == "comment") return style;
      state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type;
      return parseJS(state, style, type, content, stream);
    },

    indent: function(state, textAfter) {
      if (state.tokenize == tokenComment || state.tokenize == tokenQuasi) return CodeMirror.Pass;
      if (state.tokenize != tokenBase) return 0;
      var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical, top
      // Kludge to prevent 'maybelse' from blocking lexical scope pops
      if (!/^\s*else\b/.test(textAfter)) for (var i = state.cc.length - 1; i >= 0; --i) {
        var c = state.cc[i];
        if (c == poplex) lexical = lexical.prev;
        else if (c != maybeelse && c != popcontext) break;
      }
      while ((lexical.type == "stat" || lexical.type == "form") &&
             (firstChar == "}" || ((top = state.cc[state.cc.length - 1]) &&
                                   (top == maybeoperatorComma || top == maybeoperatorNoComma) &&
                                   !/^[,\.=+\-*:?[\(]/.test(textAfter))))
        lexical = lexical.prev;
      if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat")
        lexical = lexical.prev;
      var type = lexical.type, closing = firstChar == type;

      if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info.length + 1 : 0);
      else if (type == "form" && firstChar == "{") return lexical.indented;
      else if (type == "form") return lexical.indented + indentUnit;
      else if (type == "stat")
        return lexical.indented + (isContinuedStatement(state, textAfter) ? statementIndent || indentUnit : 0);
      else if (lexical.info == "switch" && !closing && parserConfig.doubleIndentSwitch != false)
        return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit);
      else if (lexical.align) return lexical.column + (closing ? 0 : 1);
      else return lexical.indented + (closing ? 0 : indentUnit);
    },

    electricInput: /^\s*(?:case .*?:|default:|\{|\})$/,
    blockCommentStart: jsonMode ? null : "/*",
    blockCommentEnd: jsonMode ? null : "*/",
    blockCommentContinue: jsonMode ? null : " * ",
    lineComment: jsonMode ? null : "//",
    fold: "brace",
    closeBrackets: "()[]{}''\"\"``",

    helperType: jsonMode ? "json" : "javascript",
    jsonldMode: jsonldMode,
    jsonMode: jsonMode,

    expressionAllowed: expressionAllowed,

    skipExpression: function(state) {
      parseJS(state, "atom", "atom", "true", new CodeMirror.StringStream("", 2, null))
    }
  };
});

CodeMirror.registerHelper("wordChars", "javascript", /[\w$]/);

CodeMirror.defineMIME("text/javascript", "javascript");
CodeMirror.defineMIME("text/ecmascript", "javascript");
CodeMirror.defineMIME("application/javascript", "javascript");
CodeMirror.defineMIME("application/x-javascript", "javascript");
CodeMirror.defineMIME("application/ecmascript", "javascript");
CodeMirror.defineMIME("application/json", { name: "javascript", json: true });
CodeMirror.defineMIME("application/x-json", { name: "javascript", json: true });
CodeMirror.defineMIME("application/manifest+json", { name: "javascript", json: true })
CodeMirror.defineMIME("application/ld+json", { name: "javascript", jsonld: true });
CodeMirror.defineMIME("text/typescript", { name: "javascript", typescript: true });
CodeMirror.defineMIME("application/typescript", { name: "javascript", typescript: true });

});

},{"../../lib/codemirror":3}],5:[function(require,module,exports){
(function (process){
/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

'use strict';

var _assign = require('object-assign');

// -- Inlined from fbjs --

var emptyObject = {};

if (process.env.NODE_ENV !== 'production') {
  Object.freeze(emptyObject);
}

var validateFormat = function validateFormat(format) {};

if (process.env.NODE_ENV !== 'production') {
  validateFormat = function validateFormat(format) {
    if (format === undefined) {
      throw new Error('invariant requires an error message argument');
    }
  };
}

function _invariant(condition, format, a, b, c, d, e, f) {
  validateFormat(format);

  if (!condition) {
    var error;
    if (format === undefined) {
      error = new Error('Minified exception occurred; use the non-minified dev environment ' + 'for the full error message and additional helpful warnings.');
    } else {
      var args = [a, b, c, d, e, f];
      var argIndex = 0;
      error = new Error(format.replace(/%s/g, function () {
        return args[argIndex++];
      }));
      error.name = 'Invariant Violation';
    }

    error.framesToPop = 1; // we don't care about invariant's own frame
    throw error;
  }
}

var warning = function(){};

if (process.env.NODE_ENV !== 'production') {
  var printWarning = function printWarning(format) {
    for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      args[_key - 1] = arguments[_key];
    }

    var argIndex = 0;
    var message = 'Warning: ' + format.replace(/%s/g, function () {
      return args[argIndex++];
    });
    if (typeof console !== 'undefined') {
      console.error(message);
    }
    try {
      // --- Welcome to debugging React ---
      // This error was thrown as a convenience so that you can use this stack
      // to find the callsite that caused this warning to fire.
      throw new Error(message);
    } catch (x) {}
  };

  warning = function warning(condition, format) {
    if (format === undefined) {
      throw new Error('`warning(condition, format, ...args)` requires a warning ' + 'message argument');
    }

    if (format.indexOf('Failed Composite propType: ') === 0) {
      return; // Ignore CompositeComponent proptype check.
    }

    if (!condition) {
      for (var _len2 = arguments.length, args = Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
        args[_key2 - 2] = arguments[_key2];
      }

      printWarning.apply(undefined, [format].concat(args));
    }
  };
}

// /-- Inlined from fbjs --

var MIXINS_KEY = 'mixins';

// Helper function to allow the creation of anonymous functions which do not
// have .name set to the name of the variable being assigned to.
function identity(fn) {
  return fn;
}

var ReactPropTypeLocationNames;
if (process.env.NODE_ENV !== 'production') {
  ReactPropTypeLocationNames = {
    prop: 'prop',
    context: 'context',
    childContext: 'child context'
  };
} else {
  ReactPropTypeLocationNames = {};
}

function factory(ReactComponent, isValidElement, ReactNoopUpdateQueue) {
  /**
   * Policies that describe methods in `ReactClassInterface`.
   */

  var injectedMixins = [];

  /**
   * Composite components are higher-level components that compose other composite
   * or host components.
   *
   * To create a new type of `ReactClass`, pass a specification of
   * your new class to `React.createClass`. The only requirement of your class
   * specification is that you implement a `render` method.
   *
   *   var MyComponent = React.createClass({
   *     render: function() {
   *       return <div>Hello World</div>;
   *     }
   *   });
   *
   * The class specification supports a specific protocol of methods that have
   * special meaning (e.g. `render`). See `ReactClassInterface` for
   * more the comprehensive protocol. Any other properties and methods in the
   * class specification will be available on the prototype.
   *
   * @interface ReactClassInterface
   * @internal
   */
  var ReactClassInterface = {
    /**
     * An array of Mixin objects to include when defining your component.
     *
     * @type {array}
     * @optional
     */
    mixins: 'DEFINE_MANY',

    /**
     * An object containing properties and methods that should be defined on
     * the component's constructor instead of its prototype (static methods).
     *
     * @type {object}
     * @optional
     */
    statics: 'DEFINE_MANY',

    /**
     * Definition of prop types for this component.
     *
     * @type {object}
     * @optional
     */
    propTypes: 'DEFINE_MANY',

    /**
     * Definition of context types for this component.
     *
     * @type {object}
     * @optional
     */
    contextTypes: 'DEFINE_MANY',

    /**
     * Definition of context types this component sets for its children.
     *
     * @type {object}
     * @optional
     */
    childContextTypes: 'DEFINE_MANY',

    // ==== Definition methods ====

    /**
     * Invoked when the component is mounted. Values in the mapping will be set on
     * `this.props` if that prop is not specified (i.e. using an `in` check).
     *
     * This method is invoked before `getInitialState` and therefore cannot rely
     * on `this.state` or use `this.setState`.
     *
     * @return {object}
     * @optional
     */
    getDefaultProps: 'DEFINE_MANY_MERGED',

    /**
     * Invoked once before the component is mounted. The return value will be used
     * as the initial value of `this.state`.
     *
     *   getInitialState: function() {
     *     return {
     *       isOn: false,
     *       fooBaz: new BazFoo()
     *     }
     *   }
     *
     * @return {object}
     * @optional
     */
    getInitialState: 'DEFINE_MANY_MERGED',

    /**
     * @return {object}
     * @optional
     */
    getChildContext: 'DEFINE_MANY_MERGED',

    /**
     * Uses props from `this.props` and state from `this.state` to render the
     * structure of the component.
     *
     * No guarantees are made about when or how often this method is invoked, so
     * it must not have side effects.
     *
     *   render: function() {
     *     var name = this.props.name;
     *     return <div>Hello, {name}!</div>;
     *   }
     *
     * @return {ReactComponent}
     * @required
     */
    render: 'DEFINE_ONCE',

    // ==== Delegate methods ====

    /**
     * Invoked when the component is initially created and about to be mounted.
     * This may have side effects, but any external subscriptions or data created
     * by this method must be cleaned up in `componentWillUnmount`.
     *
     * @optional
     */
    componentWillMount: 'DEFINE_MANY',

    /**
     * Invoked when the component has been mounted and has a DOM representation.
     * However, there is no guarantee that the DOM node is in the document.
     *
     * Use this as an opportunity to operate on the DOM when the component has
     * been mounted (initialized and rendered) for the first time.
     *
     * @param {DOMElement} rootNode DOM element representing the component.
     * @optional
     */
    componentDidMount: 'DEFINE_MANY',

    /**
     * Invoked before the component receives new props.
     *
     * Use this as an opportunity to react to a prop transition by updating the
     * state using `this.setState`. Current props are accessed via `this.props`.
     *
     *   componentWillReceiveProps: function(nextProps, nextContext) {
     *     this.setState({
     *       likesIncreasing: nextProps.likeCount > this.props.likeCount
     *     });
     *   }
     *
     * NOTE: There is no equivalent `componentWillReceiveState`. An incoming prop
     * transition may cause a state change, but the opposite is not true. If you
     * need it, you are probably looking for `componentWillUpdate`.
     *
     * @param {object} nextProps
     * @optional
     */
    componentWillReceiveProps: 'DEFINE_MANY',

    /**
     * Invoked while deciding if the component should be updated as a result of
     * receiving new props, state and/or context.
     *
     * Use this as an opportunity to `return false` when you're certain that the
     * transition to the new props/state/context will not require a component
     * update.
     *
     *   shouldComponentUpdate: function(nextProps, nextState, nextContext) {
     *     return !equal(nextProps, this.props) ||
     *       !equal(nextState, this.state) ||
     *       !equal(nextContext, this.context);
     *   }
     *
     * @param {object} nextProps
     * @param {?object} nextState
     * @param {?object} nextContext
     * @return {boolean} True if the component should update.
     * @optional
     */
    shouldComponentUpdate: 'DEFINE_ONCE',

    /**
     * Invoked when the component is about to update due to a transition from
     * `this.props`, `this.state` and `this.context` to `nextProps`, `nextState`
     * and `nextContext`.
     *
     * Use this as an opportunity to perform preparation before an update occurs.
     *
     * NOTE: You **cannot** use `this.setState()` in this method.
     *
     * @param {object} nextProps
     * @param {?object} nextState
     * @param {?object} nextContext
     * @param {ReactReconcileTransaction} transaction
     * @optional
     */
    componentWillUpdate: 'DEFINE_MANY',

    /**
     * Invoked when the component's DOM representation has been updated.
     *
     * Use this as an opportunity to operate on the DOM when the component has
     * been updated.
     *
     * @param {object} prevProps
     * @param {?object} prevState
     * @param {?object} prevContext
     * @param {DOMElement} rootNode DOM element representing the component.
     * @optional
     */
    componentDidUpdate: 'DEFINE_MANY',

    /**
     * Invoked when the component is about to be removed from its parent and have
     * its DOM representation destroyed.
     *
     * Use this as an opportunity to deallocate any external resources.
     *
     * NOTE: There is no `componentDidUnmount` since your component will have been
     * destroyed by that point.
     *
     * @optional
     */
    componentWillUnmount: 'DEFINE_MANY',

    /**
     * Replacement for (deprecated) `componentWillMount`.
     *
     * @optional
     */
    UNSAFE_componentWillMount: 'DEFINE_MANY',

    /**
     * Replacement for (deprecated) `componentWillReceiveProps`.
     *
     * @optional
     */
    UNSAFE_componentWillReceiveProps: 'DEFINE_MANY',

    /**
     * Replacement for (deprecated) `componentWillUpdate`.
     *
     * @optional
     */
    UNSAFE_componentWillUpdate: 'DEFINE_MANY',

    // ==== Advanced methods ====

    /**
     * Updates the component's currently mounted DOM representation.
     *
     * By default, this implements React's rendering and reconciliation algorithm.
     * Sophisticated clients may wish to override this.
     *
     * @param {ReactReconcileTransaction} transaction
     * @internal
     * @overridable
     */
    updateComponent: 'OVERRIDE_BASE'
  };

  /**
   * Similar to ReactClassInterface but for static methods.
   */
  var ReactClassStaticInterface = {
    /**
     * This method is invoked after a component is instantiated and when it
     * receives new props. Return an object to update state in response to
     * prop changes. Return null to indicate no change to state.
     *
     * If an object is returned, its keys will be merged into the existing state.
     *
     * @return {object || null}
     * @optional
     */
    getDerivedStateFromProps: 'DEFINE_MANY_MERGED'
  };

  /**
   * Mapping from class specification keys to special processing functions.
   *
   * Although these are declared like instance properties in the specification
   * when defining classes using `React.createClass`, they are actually static
   * and are accessible on the constructor instead of the prototype. Despite
   * being static, they must be defined outside of the "statics" key under
   * which all other static methods are defined.
   */
  var RESERVED_SPEC_KEYS = {
    displayName: function(Constructor, displayName) {
      Constructor.displayName = displayName;
    },
    mixins: function(Constructor, mixins) {
      if (mixins) {
        for (var i = 0; i < mixins.length; i++) {
          mixSpecIntoComponent(Constructor, mixins[i]);
        }
      }
    },
    childContextTypes: function(Constructor, childContextTypes) {
      if (process.env.NODE_ENV !== 'production') {
        validateTypeDef(Constructor, childContextTypes, 'childContext');
      }
      Constructor.childContextTypes = _assign(
        {},
        Constructor.childContextTypes,
        childContextTypes
      );
    },
    contextTypes: function(Constructor, contextTypes) {
      if (process.env.NODE_ENV !== 'production') {
        validateTypeDef(Constructor, contextTypes, 'context');
      }
      Constructor.contextTypes = _assign(
        {},
        Constructor.contextTypes,
        contextTypes
      );
    },
    /**
     * Special case getDefaultProps which should move into statics but requires
     * automatic merging.
     */
    getDefaultProps: function(Constructor, getDefaultProps) {
      if (Constructor.getDefaultProps) {
        Constructor.getDefaultProps = createMergedResultFunction(
          Constructor.getDefaultProps,
          getDefaultProps
        );
      } else {
        Constructor.getDefaultProps = getDefaultProps;
      }
    },
    propTypes: function(Constructor, propTypes) {
      if (process.env.NODE_ENV !== 'production') {
        validateTypeDef(Constructor, propTypes, 'prop');
      }
      Constructor.propTypes = _assign({}, Constructor.propTypes, propTypes);
    },
    statics: function(Constructor, statics) {
      mixStaticSpecIntoComponent(Constructor, statics);
    },
    autobind: function() {}
  };

  function validateTypeDef(Constructor, typeDef, location) {
    for (var propName in typeDef) {
      if (typeDef.hasOwnProperty(propName)) {
        // use a warning instead of an _invariant so components
        // don't show up in prod but only in __DEV__
        if (process.env.NODE_ENV !== 'production') {
          warning(
            typeof typeDef[propName] === 'function',
            '%s: %s type `%s` is invalid; it must be a function, usually from ' +
              'React.PropTypes.',
            Constructor.displayName || 'ReactClass',
            ReactPropTypeLocationNames[location],
            propName
          );
        }
      }
    }
  }

  function validateMethodOverride(isAlreadyDefined, name) {
    var specPolicy = ReactClassInterface.hasOwnProperty(name)
      ? ReactClassInterface[name]
      : null;

    // Disallow overriding of base class methods unless explicitly allowed.
    if (ReactClassMixin.hasOwnProperty(name)) {
      _invariant(
        specPolicy === 'OVERRIDE_BASE',
        'ReactClassInterface: You are attempting to override ' +
          '`%s` from your class specification. Ensure that your method names ' +
          'do not overlap with React methods.',
        name
      );
    }

    // Disallow defining methods more than once unless explicitly allowed.
    if (isAlreadyDefined) {
      _invariant(
        specPolicy === 'DEFINE_MANY' || specPolicy === 'DEFINE_MANY_MERGED',
        'ReactClassInterface: You are attempting to define ' +
          '`%s` on your component more than once. This conflict may be due ' +
          'to a mixin.',
        name
      );
    }
  }

  /**
   * Mixin helper which handles policy validation and reserved
   * specification keys when building React classes.
   */
  function mixSpecIntoComponent(Constructor, spec) {
    if (!spec) {
      if (process.env.NODE_ENV !== 'production') {
        var typeofSpec = typeof spec;
        var isMixinValid = typeofSpec === 'object' && spec !== null;

        if (process.env.NODE_ENV !== 'production') {
          warning(
            isMixinValid,
            "%s: You're attempting to include a mixin that is either null " +
              'or not an object. Check the mixins included by the component, ' +
              'as well as any mixins they include themselves. ' +
              'Expected object but got %s.',
            Constructor.displayName || 'ReactClass',
            spec === null ? null : typeofSpec
          );
        }
      }

      return;
    }

    _invariant(
      typeof spec !== 'function',
      "ReactClass: You're attempting to " +
        'use a component class or function as a mixin. Instead, just use a ' +
        'regular object.'
    );
    _invariant(
      !isValidElement(spec),
      "ReactClass: You're attempting to " +
        'use a component as a mixin. Instead, just use a regular object.'
    );

    var proto = Constructor.prototype;
    var autoBindPairs = proto.__reactAutoBindPairs;

    // By handling mixins before any other properties, we ensure the same
    // chaining order is applied to methods with DEFINE_MANY policy, whether
    // mixins are listed before or after these methods in the spec.
    if (spec.hasOwnProperty(MIXINS_KEY)) {
      RESERVED_SPEC_KEYS.mixins(Constructor, spec.mixins);
    }

    for (var name in spec) {
      if (!spec.hasOwnProperty(name)) {
        continue;
      }

      if (name === MIXINS_KEY) {
        // We have already handled mixins in a special case above.
        continue;
      }

      var property = spec[name];
      var isAlreadyDefined = proto.hasOwnProperty(name);
      validateMethodOverride(isAlreadyDefined, name);

      if (RESERVED_SPEC_KEYS.hasOwnProperty(name)) {
        RESERVED_SPEC_KEYS[name](Constructor, property);
      } else {
        // Setup methods on prototype:
        // The following member methods should not be automatically bound:
        // 1. Expected ReactClass methods (in the "interface").
        // 2. Overridden methods (that were mixed in).
        var isReactClassMethod = ReactClassInterface.hasOwnProperty(name);
        var isFunction = typeof property === 'function';
        var shouldAutoBind =
          isFunction &&
          !isReactClassMethod &&
          !isAlreadyDefined &&
          spec.autobind !== false;

        if (shouldAutoBind) {
          autoBindPairs.push(name, property);
          proto[name] = property;
        } else {
          if (isAlreadyDefined) {
            var specPolicy = ReactClassInterface[name];

            // These cases should already be caught by validateMethodOverride.
            _invariant(
              isReactClassMethod &&
                (specPolicy === 'DEFINE_MANY_MERGED' ||
                  specPolicy === 'DEFINE_MANY'),
              'ReactClass: Unexpected spec policy %s for key %s ' +
                'when mixing in component specs.',
              specPolicy,
              name
            );

            // For methods which are defined more than once, call the existing
            // methods before calling the new property, merging if appropriate.
            if (specPolicy === 'DEFINE_MANY_MERGED') {
              proto[name] = createMergedResultFunction(proto[name], property);
            } else if (specPolicy === 'DEFINE_MANY') {
              proto[name] = createChainedFunction(proto[name], property);
            }
          } else {
            proto[name] = property;
            if (process.env.NODE_ENV !== 'production') {
              // Add verbose displayName to the function, which helps when looking
              // at profiling tools.
              if (typeof property === 'function' && spec.displayName) {
                proto[name].displayName = spec.displayName + '_' + name;
              }
            }
          }
        }
      }
    }
  }

  function mixStaticSpecIntoComponent(Constructor, statics) {
    if (!statics) {
      return;
    }

    for (var name in statics) {
      var property = statics[name];
      if (!statics.hasOwnProperty(name)) {
        continue;
      }

      var isReserved = name in RESERVED_SPEC_KEYS;
      _invariant(
        !isReserved,
        'ReactClass: You are attempting to define a reserved ' +
          'property, `%s`, that shouldn\'t be on the "statics" key. Define it ' +
          'as an instance property instead; it will still be accessible on the ' +
          'constructor.',
        name
      );

      var isAlreadyDefined = name in Constructor;
      if (isAlreadyDefined) {
        var specPolicy = ReactClassStaticInterface.hasOwnProperty(name)
          ? ReactClassStaticInterface[name]
          : null;

        _invariant(
          specPolicy === 'DEFINE_MANY_MERGED',
          'ReactClass: You are attempting to define ' +
            '`%s` on your component more than once. This conflict may be ' +
            'due to a mixin.',
          name
        );

        Constructor[name] = createMergedResultFunction(Constructor[name], property);

        return;
      }

      Constructor[name] = property;
    }
  }

  /**
   * Merge two objects, but throw if both contain the same key.
   *
   * @param {object} one The first object, which is mutated.
   * @param {object} two The second object
   * @return {object} one after it has been mutated to contain everything in two.
   */
  function mergeIntoWithNoDuplicateKeys(one, two) {
    _invariant(
      one && two && typeof one === 'object' && typeof two === 'object',
      'mergeIntoWithNoDuplicateKeys(): Cannot merge non-objects.'
    );

    for (var key in two) {
      if (two.hasOwnProperty(key)) {
        _invariant(
          one[key] === undefined,
          'mergeIntoWithNoDuplicateKeys(): ' +
            'Tried to merge two objects with the same key: `%s`. This conflict ' +
            'may be due to a mixin; in particular, this may be caused by two ' +
            'getInitialState() or getDefaultProps() methods returning objects ' +
            'with clashing keys.',
          key
        );
        one[key] = two[key];
      }
    }
    return one;
  }

  /**
   * Creates a function that invokes two functions and merges their return values.
   *
   * @param {function} one Function to invoke first.
   * @param {function} two Function to invoke second.
   * @return {function} Function that invokes the two argument functions.
   * @private
   */
  function createMergedResultFunction(one, two) {
    return function mergedResult() {
      var a = one.apply(this, arguments);
      var b = two.apply(this, arguments);
      if (a == null) {
        return b;
      } else if (b == null) {
        return a;
      }
      var c = {};
      mergeIntoWithNoDuplicateKeys(c, a);
      mergeIntoWithNoDuplicateKeys(c, b);
      return c;
    };
  }

  /**
   * Creates a function that invokes two functions and ignores their return vales.
   *
   * @param {function} one Function to invoke first.
   * @param {function} two Function to invoke second.
   * @return {function} Function that invokes the two argument functions.
   * @private
   */
  function createChainedFunction(one, two) {
    return function chainedFunction() {
      one.apply(this, arguments);
      two.apply(this, arguments);
    };
  }

  /**
   * Binds a method to the component.
   *
   * @param {object} component Component whose method is going to be bound.
   * @param {function} method Method to be bound.
   * @return {function} The bound method.
   */
  function bindAutoBindMethod(component, method) {
    var boundMethod = method.bind(component);
    if (process.env.NODE_ENV !== 'production') {
      boundMethod.__reactBoundContext = component;
      boundMethod.__reactBoundMethod = method;
      boundMethod.__reactBoundArguments = null;
      var componentName = component.constructor.displayName;
      var _bind = boundMethod.bind;
      boundMethod.bind = function(newThis) {
        for (
          var _len = arguments.length,
            args = Array(_len > 1 ? _len - 1 : 0),
            _key = 1;
          _key < _len;
          _key++
        ) {
          args[_key - 1] = arguments[_key];
        }

        // User is trying to bind() an autobound method; we effectively will
        // ignore the value of "this" that the user is trying to use, so
        // let's warn.
        if (newThis !== component && newThis !== null) {
          if (process.env.NODE_ENV !== 'production') {
            warning(
              false,
              'bind(): React component methods may only be bound to the ' +
                'component instance. See %s',
              componentName
            );
          }
        } else if (!args.length) {
          if (process.env.NODE_ENV !== 'production') {
            warning(
              false,
              'bind(): You are binding a component method to the component. ' +
                'React does this for you automatically in a high-performance ' +
                'way, so you can safely remove this call. See %s',
              componentName
            );
          }
          return boundMethod;
        }
        var reboundMethod = _bind.apply(boundMethod, arguments);
        reboundMethod.__reactBoundContext = component;
        reboundMethod.__reactBoundMethod = method;
        reboundMethod.__reactBoundArguments = args;
        return reboundMethod;
      };
    }
    return boundMethod;
  }

  /**
   * Binds all auto-bound methods in a component.
   *
   * @param {object} component Component whose method is going to be bound.
   */
  function bindAutoBindMethods(component) {
    var pairs = component.__reactAutoBindPairs;
    for (var i = 0; i < pairs.length; i += 2) {
      var autoBindKey = pairs[i];
      var method = pairs[i + 1];
      component[autoBindKey] = bindAutoBindMethod(component, method);
    }
  }

  var IsMountedPreMixin = {
    componentDidMount: function() {
      this.__isMounted = true;
    }
  };

  var IsMountedPostMixin = {
    componentWillUnmount: function() {
      this.__isMounted = false;
    }
  };

  /**
   * Add more to the ReactClass base class. These are all legacy features and
   * therefore not already part of the modern ReactComponent.
   */
  var ReactClassMixin = {
    /**
     * TODO: This will be deprecated because state should always keep a consistent
     * type signature and the only use case for this, is to avoid that.
     */
    replaceState: function(newState, callback) {
      this.updater.enqueueReplaceState(this, newState, callback);
    },

    /**
     * Checks whether or not this composite component is mounted.
     * @return {boolean} True if mounted, false otherwise.
     * @protected
     * @final
     */
    isMounted: function() {
      if (process.env.NODE_ENV !== 'production') {
        warning(
          this.__didWarnIsMounted,
          '%s: isMounted is deprecated. Instead, make sure to clean up ' +
            'subscriptions and pending requests in componentWillUnmount to ' +
            'prevent memory leaks.',
          (this.constructor && this.constructor.displayName) ||
            this.name ||
            'Component'
        );
        this.__didWarnIsMounted = true;
      }
      return !!this.__isMounted;
    }
  };

  var ReactClassComponent = function() {};
  _assign(
    ReactClassComponent.prototype,
    ReactComponent.prototype,
    ReactClassMixin
  );

  /**
   * Creates a composite component class given a class specification.
   * See https://facebook.github.io/react/docs/top-level-api.html#react.createclass
   *
   * @param {object} spec Class specification (which must define `render`).
   * @return {function} Component constructor function.
   * @public
   */
  function createClass(spec) {
    // To keep our warnings more understandable, we'll use a little hack here to
    // ensure that Constructor.name !== 'Constructor'. This makes sure we don't
    // unnecessarily identify a class without displayName as 'Constructor'.
    var Constructor = identity(function(props, context, updater) {
      // This constructor gets overridden by mocks. The argument is used
      // by mocks to assert on what gets mounted.

      if (process.env.NODE_ENV !== 'production') {
        warning(
          this instanceof Constructor,
          'Something is calling a React component directly. Use a factory or ' +
            'JSX instead. See: https://fb.me/react-legacyfactory'
        );
      }

      // Wire up auto-binding
      if (this.__reactAutoBindPairs.length) {
        bindAutoBindMethods(this);
      }

      this.props = props;
      this.context = context;
      this.refs = emptyObject;
      this.updater = updater || ReactNoopUpdateQueue;

      this.state = null;

      // ReactClasses doesn't have constructors. Instead, they use the
      // getInitialState and componentWillMount methods for initialization.

      var initialState = this.getInitialState ? this.getInitialState() : null;
      if (process.env.NODE_ENV !== 'production') {
        // We allow auto-mocks to proceed as if they're returning null.
        if (
          initialState === undefined &&
          this.getInitialState._isMockFunction
        ) {
          // This is probably bad practice. Consider warning here and
          // deprecating this convenience.
          initialState = null;
        }
      }
      _invariant(
        typeof initialState === 'object' && !Array.isArray(initialState),
        '%s.getInitialState(): must return an object or null',
        Constructor.displayName || 'ReactCompositeComponent'
      );

      this.state = initialState;
    });
    Constructor.prototype = new ReactClassComponent();
    Constructor.prototype.constructor = Constructor;
    Constructor.prototype.__reactAutoBindPairs = [];

    injectedMixins.forEach(mixSpecIntoComponent.bind(null, Constructor));

    mixSpecIntoComponent(Constructor, IsMountedPreMixin);
    mixSpecIntoComponent(Constructor, spec);
    mixSpecIntoComponent(Constructor, IsMountedPostMixin);

    // Initialize the defaultProps property after all mixins have been merged.
    if (Constructor.getDefaultProps) {
      Constructor.defaultProps = Constructor.getDefaultProps();
    }

    if (process.env.NODE_ENV !== 'production') {
      // This is a tag to indicate that the use of these method names is ok,
      // since it's used with createClass. If it's not, then it's likely a
      // mistake so we'll warn you to use the static property, property
      // initializer or constructor respectively.
      if (Constructor.getDefaultProps) {
        Constructor.getDefaultProps.isReactClassApproved = {};
      }
      if (Constructor.prototype.getInitialState) {
        Constructor.prototype.getInitialState.isReactClassApproved = {};
      }
    }

    _invariant(
      Constructor.prototype.render,
      'createClass(...): Class specification must implement a `render` method.'
    );

    if (process.env.NODE_ENV !== 'production') {
      warning(
        !Constructor.prototype.componentShouldUpdate,
        '%s has a method called ' +
          'componentShouldUpdate(). Did you mean shouldComponentUpdate()? ' +
          'The name is phrased as a question because the function is ' +
          'expected to return a value.',
        spec.displayName || 'A component'
      );
      warning(
        !Constructor.prototype.componentWillRecieveProps,
        '%s has a method called ' +
          'componentWillRecieveProps(). Did you mean componentWillReceiveProps()?',
        spec.displayName || 'A component'
      );
      warning(
        !Constructor.prototype.UNSAFE_componentWillRecieveProps,
        '%s has a method called UNSAFE_componentWillRecieveProps(). ' +
          'Did you mean UNSAFE_componentWillReceiveProps()?',
        spec.displayName || 'A component'
      );
    }

    // Reduce time spent doing lookups by setting these on the prototype.
    for (var methodName in ReactClassInterface) {
      if (!Constructor.prototype[methodName]) {
        Constructor.prototype[methodName] = null;
      }
    }

    return Constructor;
  }

  return createClass;
}

module.exports = factory;

}).call(this,require('_process'))
},{"_process":11,"object-assign":10}],6:[function(require,module,exports){
/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

'use strict';

var React = require('react');
var factory = require('./factory');

if (typeof React === 'undefined') {
  throw Error(
    'create-react-class could not find the React object. If you are using script tags, ' +
      'make sure that React is being loaded before create-react-class.'
  );
}

// Hack to grab NoopUpdateQueue from isomorphic React
var ReactNoopUpdateQueue = new React.Component().updater;

module.exports = factory(
  React.Component,
  React.isValidElement,
  ReactNoopUpdateQueue
);

},{"./factory":5,"react":35}],7:[function(require,module,exports){
"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

exports.__esModule = true;
exports.default = addClass;

var _hasClass = _interopRequireDefault(require("./hasClass"));

function addClass(element, className) {
  if (element.classList) element.classList.add(className);else if (!(0, _hasClass.default)(element, className)) if (typeof element.className === 'string') element.className = element.className + ' ' + className;else element.setAttribute('class', (element.className && element.className.baseVal || '') + ' ' + className);
}

module.exports = exports["default"];
},{"./hasClass":8,"@babel/runtime/helpers/interopRequireDefault":1}],8:[function(require,module,exports){
"use strict";

exports.__esModule = true;
exports.default = hasClass;

function hasClass(element, className) {
  if (element.classList) return !!className && element.classList.contains(className);else return (" " + (element.className.baseVal || element.className) + " ").indexOf(" " + className + " ") !== -1;
}

module.exports = exports["default"];
},{}],9:[function(require,module,exports){
'use strict';

function replaceClassName(origClass, classToRemove) {
  return origClass.replace(new RegExp('(^|\\s)' + classToRemove + '(?:\\s|$)', 'g'), '$1').replace(/\s+/g, ' ').replace(/^\s*|\s*$/g, '');
}

module.exports = function removeClass(element, className) {
  if (element.classList) element.classList.remove(className);else if (typeof element.className === 'string') element.className = replaceClassName(element.className, className);else element.setAttribute('class', replaceClassName(element.className && element.className.baseVal || '', className));
};
},{}],10:[function(require,module,exports){
/*
object-assign
(c) Sindre Sorhus
@license MIT
*/

'use strict';
/* eslint-disable no-unused-vars */
var getOwnPropertySymbols = Object.getOwnPropertySymbols;
var hasOwnProperty = Object.prototype.hasOwnProperty;
var propIsEnumerable = Object.prototype.propertyIsEnumerable;

function toObject(val) {
	if (val === null || val === undefined) {
		throw new TypeError('Object.assign cannot be called with null or undefined');
	}

	return Object(val);
}

function shouldUseNative() {
	try {
		if (!Object.assign) {
			return false;
		}

		// Detect buggy property enumeration order in older V8 versions.

		// https://bugs.chromium.org/p/v8/issues/detail?id=4118
		var test1 = new String('abc');  // eslint-disable-line no-new-wrappers
		test1[5] = 'de';
		if (Object.getOwnPropertyNames(test1)[0] === '5') {
			return false;
		}

		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
		var test2 = {};
		for (var i = 0; i < 10; i++) {
			test2['_' + String.fromCharCode(i)] = i;
		}
		var order2 = Object.getOwnPropertyNames(test2).map(function (n) {
			return test2[n];
		});
		if (order2.join('') !== '0123456789') {
			return false;
		}

		// https://bugs.chromium.org/p/v8/issues/detail?id=3056
		var test3 = {};
		'abcdefghijklmnopqrst'.split('').forEach(function (letter) {
			test3[letter] = letter;
		});
		if (Object.keys(Object.assign({}, test3)).join('') !==
				'abcdefghijklmnopqrst') {
			return false;
		}

		return true;
	} catch (err) {
		// We don't expect any of the above to throw, but better to be safe.
		return false;
	}
}

module.exports = shouldUseNative() ? Object.assign : function (target, source) {
	var from;
	var to = toObject(target);
	var symbols;

	for (var s = 1; s < arguments.length; s++) {
		from = Object(arguments[s]);

		for (var key in from) {
			if (hasOwnProperty.call(from, key)) {
				to[key] = from[key];
			}
		}

		if (getOwnPropertySymbols) {
			symbols = getOwnPropertySymbols(from);
			for (var i = 0; i < symbols.length; i++) {
				if (propIsEnumerable.call(from, symbols[i])) {
					to[symbols[i]] = from[symbols[i]];
				}
			}
		}
	}

	return to;
};

},{}],11:[function(require,module,exports){
// shim for using process in browser
var process = module.exports = {};

// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.

var cachedSetTimeout;
var cachedClearTimeout;

function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
(function () {
    try {
        if (typeof setTimeout === 'function') {
            cachedSetTimeout = setTimeout;
        } else {
            cachedSetTimeout = defaultSetTimout;
        }
    } catch (e) {
        cachedSetTimeout = defaultSetTimout;
    }
    try {
        if (typeof clearTimeout === 'function') {
            cachedClearTimeout = clearTimeout;
        } else {
            cachedClearTimeout = defaultClearTimeout;
        }
    } catch (e) {
        cachedClearTimeout = defaultClearTimeout;
    }
} ())
function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }


}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }



}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;

process.listeners = function (name) { return [] }

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };

},{}],12:[function(require,module,exports){
(function (process){
/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';

var printWarning = function() {};

if (process.env.NODE_ENV !== 'production') {
  var ReactPropTypesSecret = require('./lib/ReactPropTypesSecret');
  var loggedTypeFailures = {};
  var has = Function.call.bind(Object.prototype.hasOwnProperty);

  printWarning = function(text) {
    var message = 'Warning: ' + text;
    if (typeof console !== 'undefined') {
      console.error(message);
    }
    try {
      // --- Welcome to debugging React ---
      // This error was thrown as a convenience so that you can use this stack
      // to find the callsite that caused this warning to fire.
      throw new Error(message);
    } catch (x) {}
  };
}

/**
 * Assert that the values match with the type specs.
 * Error messages are memorized and will only be shown once.
 *
 * @param {object} typeSpecs Map of name to a ReactPropType
 * @param {object} values Runtime values that need to be type-checked
 * @param {string} location e.g. "prop", "context", "child context"
 * @param {string} componentName Name of the component for error messages.
 * @param {?Function} getStack Returns the component stack.
 * @private
 */
function checkPropTypes(typeSpecs, values, location, componentName, getStack) {
  if (process.env.NODE_ENV !== 'production') {
    for (var typeSpecName in typeSpecs) {
      if (has(typeSpecs, typeSpecName)) {
        var error;
        // Prop type validation may throw. In case they do, we don't want to
        // fail the render phase where it didn't fail before. So we log it.
        // After these have been cleaned up, we'll let them throw.
        try {
          // This is intentionally an invariant that gets caught. It's the same
          // behavior as without this statement except with a better message.
          if (typeof typeSpecs[typeSpecName] !== 'function') {
            var err = Error(
              (componentName || 'React class') + ': ' + location + ' type `' + typeSpecName + '` is invalid; ' +
              'it must be a function, usually from the `prop-types` package, but received `' + typeof typeSpecs[typeSpecName] + '`.'
            );
            err.name = 'Invariant Violation';
            throw err;
          }
          error = typeSpecs[typeSpecName](values, typeSpecName, componentName, location, null, ReactPropTypesSecret);
        } catch (ex) {
          error = ex;
        }
        if (error && !(error instanceof Error)) {
          printWarning(
            (componentName || 'React class') + ': type specification of ' +
            location + ' `' + typeSpecName + '` is invalid; the type checker ' +
            'function must return `null` or an `Error` but returned a ' + typeof error + '. ' +
            'You may have forgotten to pass an argument to the type checker ' +
            'creator (arrayOf, instanceOf, objectOf, oneOf, oneOfType, and ' +
            'shape all require an argument).'
          );
        }
        if (error instanceof Error && !(error.message in loggedTypeFailures)) {
          // Only monitor this failure once because there tends to be a lot of the
          // same error.
          loggedTypeFailures[error.message] = true;

          var stack = getStack ? getStack() : '';

          printWarning(
            'Failed ' + location + ' type: ' + error.message + (stack != null ? stack : '')
          );
        }
      }
    }
  }
}

/**
 * Resets warning cache when testing.
 *
 * @private
 */
checkPropTypes.resetWarningCache = function() {
  if (process.env.NODE_ENV !== 'production') {
    loggedTypeFailures = {};
  }
}

module.exports = checkPropTypes;

}).call(this,require('_process'))
},{"./lib/ReactPropTypesSecret":16,"_process":11}],13:[function(require,module,exports){
/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';

var ReactPropTypesSecret = require('./lib/ReactPropTypesSecret');

function emptyFunction() {}
function emptyFunctionWithReset() {}
emptyFunctionWithReset.resetWarningCache = emptyFunction;

module.exports = function() {
  function shim(props, propName, componentName, location, propFullName, secret) {
    if (secret === ReactPropTypesSecret) {
      // It is still safe when called from React.
      return;
    }
    var err = new Error(
      'Calling PropTypes validators directly is not supported by the `prop-types` package. ' +
      'Use PropTypes.checkPropTypes() to call them. ' +
      'Read more at http://fb.me/use-check-prop-types'
    );
    err.name = 'Invariant Violation';
    throw err;
  };
  shim.isRequired = shim;
  function getShim() {
    return shim;
  };
  // Important!
  // Keep this list in sync with production version in `./factoryWithTypeCheckers.js`.
  var ReactPropTypes = {
    array: shim,
    bool: shim,
    func: shim,
    number: shim,
    object: shim,
    string: shim,
    symbol: shim,

    any: shim,
    arrayOf: getShim,
    element: shim,
    elementType: shim,
    instanceOf: getShim,
    node: shim,
    objectOf: getShim,
    oneOf: getShim,
    oneOfType: getShim,
    shape: getShim,
    exact: getShim,

    checkPropTypes: emptyFunctionWithReset,
    resetWarningCache: emptyFunction
  };

  ReactPropTypes.PropTypes = ReactPropTypes;

  return ReactPropTypes;
};

},{"./lib/ReactPropTypesSecret":16}],14:[function(require,module,exports){
(function (process){
/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';

var ReactIs = require('react-is');
var assign = require('object-assign');

var ReactPropTypesSecret = require('./lib/ReactPropTypesSecret');
var checkPropTypes = require('./checkPropTypes');

var has = Function.call.bind(Object.prototype.hasOwnProperty);
var printWarning = function() {};

if (process.env.NODE_ENV !== 'production') {
  printWarning = function(text) {
    var message = 'Warning: ' + text;
    if (typeof console !== 'undefined') {
      console.error(message);
    }
    try {
      // --- Welcome to debugging React ---
      // This error was thrown as a convenience so that you can use this stack
      // to find the callsite that caused this warning to fire.
      throw new Error(message);
    } catch (x) {}
  };
}

function emptyFunctionThatReturnsNull() {
  return null;
}

module.exports = function(isValidElement, throwOnDirectAccess) {
  /* global Symbol */
  var ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;
  var FAUX_ITERATOR_SYMBOL = '@@iterator'; // Before Symbol spec.

  /**
   * Returns the iterator method function contained on the iterable object.
   *
   * Be sure to invoke the function with the iterable as context:
   *
   *     var iteratorFn = getIteratorFn(myIterable);
   *     if (iteratorFn) {
   *       var iterator = iteratorFn.call(myIterable);
   *       ...
   *     }
   *
   * @param {?object} maybeIterable
   * @return {?function}
   */
  function getIteratorFn(maybeIterable) {
    var iteratorFn = maybeIterable && (ITERATOR_SYMBOL && maybeIterable[ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL]);
    if (typeof iteratorFn === 'function') {
      return iteratorFn;
    }
  }

  /**
   * Collection of methods that allow declaration and validation of props that are
   * supplied to React components. Example usage:
   *
   *   var Props = require('ReactPropTypes');
   *   var MyArticle = React.createClass({
   *     propTypes: {
   *       // An optional string prop named "description".
   *       description: Props.string,
   *
   *       // A required enum prop named "category".
   *       category: Props.oneOf(['News','Photos']).isRequired,
   *
   *       // A prop named "dialog" that requires an instance of Dialog.
   *       dialog: Props.instanceOf(Dialog).isRequired
   *     },
   *     render: function() { ... }
   *   });
   *
   * A more formal specification of how these methods are used:
   *
   *   type := array|bool|func|object|number|string|oneOf([...])|instanceOf(...)
   *   decl := ReactPropTypes.{type}(.isRequired)?
   *
   * Each and every declaration produces a function with the same signature. This
   * allows the creation of custom validation functions. For example:
   *
   *  var MyLink = React.createClass({
   *    propTypes: {
   *      // An optional string or URI prop named "href".
   *      href: function(props, propName, componentName) {
   *        var propValue = props[propName];
   *        if (propValue != null && typeof propValue !== 'string' &&
   *            !(propValue instanceof URI)) {
   *          return new Error(
   *            'Expected a string or an URI for ' + propName + ' in ' +
   *            componentName
   *          );
   *        }
   *      }
   *    },
   *    render: function() {...}
   *  });
   *
   * @internal
   */

  var ANONYMOUS = '<<anonymous>>';

  // Important!
  // Keep this list in sync with production version in `./factoryWithThrowingShims.js`.
  var ReactPropTypes = {
    array: createPrimitiveTypeChecker('array'),
    bool: createPrimitiveTypeChecker('boolean'),
    func: createPrimitiveTypeChecker('function'),
    number: createPrimitiveTypeChecker('number'),
    object: createPrimitiveTypeChecker('object'),
    string: createPrimitiveTypeChecker('string'),
    symbol: createPrimitiveTypeChecker('symbol'),

    any: createAnyTypeChecker(),
    arrayOf: createArrayOfTypeChecker,
    element: createElementTypeChecker(),
    elementType: createElementTypeTypeChecker(),
    instanceOf: createInstanceTypeChecker,
    node: createNodeChecker(),
    objectOf: createObjectOfTypeChecker,
    oneOf: createEnumTypeChecker,
    oneOfType: createUnionTypeChecker,
    shape: createShapeTypeChecker,
    exact: createStrictShapeTypeChecker,
  };

  /**
   * inlined Object.is polyfill to avoid requiring consumers ship their own
   * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
   */
  /*eslint-disable no-self-compare*/
  function is(x, y) {
    // SameValue algorithm
    if (x === y) {
      // Steps 1-5, 7-10
      // Steps 6.b-6.e: +0 != -0
      return x !== 0 || 1 / x === 1 / y;
    } else {
      // Step 6.a: NaN == NaN
      return x !== x && y !== y;
    }
  }
  /*eslint-enable no-self-compare*/

  /**
   * We use an Error-like object for backward compatibility as people may call
   * PropTypes directly and inspect their output. However, we don't use real
   * Errors anymore. We don't inspect their stack anyway, and creating them
   * is prohibitively expensive if they are created too often, such as what
   * happens in oneOfType() for any type before the one that matched.
   */
  function PropTypeError(message) {
    this.message = message;
    this.stack = '';
  }
  // Make `instanceof Error` still work for returned errors.
  PropTypeError.prototype = Error.prototype;

  function createChainableTypeChecker(validate) {
    if (process.env.NODE_ENV !== 'production') {
      var manualPropTypeCallCache = {};
      var manualPropTypeWarningCount = 0;
    }
    function checkType(isRequired, props, propName, componentName, location, propFullName, secret) {
      componentName = componentName || ANONYMOUS;
      propFullName = propFullName || propName;

      if (secret !== ReactPropTypesSecret) {
        if (throwOnDirectAccess) {
          // New behavior only for users of `prop-types` package
          var err = new Error(
            'Calling PropTypes validators directly is not supported by the `prop-types` package. ' +
            'Use `PropTypes.checkPropTypes()` to call them. ' +
            'Read more at http://fb.me/use-check-prop-types'
          );
          err.name = 'Invariant Violation';
          throw err;
        } else if (process.env.NODE_ENV !== 'production' && typeof console !== 'undefined') {
          // Old behavior for people using React.PropTypes
          var cacheKey = componentName + ':' + propName;
          if (
            !manualPropTypeCallCache[cacheKey] &&
            // Avoid spamming the console because they are often not actionable except for lib authors
            manualPropTypeWarningCount < 3
          ) {
            printWarning(
              'You are manually calling a React.PropTypes validation ' +
              'function for the `' + propFullName + '` prop on `' + componentName  + '`. This is deprecated ' +
              'and will throw in the standalone `prop-types` package. ' +
              'You may be seeing this warning due to a third-party PropTypes ' +
              'library. See https://fb.me/react-warning-dont-call-proptypes ' + 'for details.'
            );
            manualPropTypeCallCache[cacheKey] = true;
            manualPropTypeWarningCount++;
          }
        }
      }
      if (props[propName] == null) {
        if (isRequired) {
          if (props[propName] === null) {
            return new PropTypeError('The ' + location + ' `' + propFullName + '` is marked as required ' + ('in `' + componentName + '`, but its value is `null`.'));
          }
          return new PropTypeError('The ' + location + ' `' + propFullName + '` is marked as required in ' + ('`' + componentName + '`, but its value is `undefined`.'));
        }
        return null;
      } else {
        return validate(props, propName, componentName, location, propFullName);
      }
    }

    var chainedCheckType = checkType.bind(null, false);
    chainedCheckType.isRequired = checkType.bind(null, true);

    return chainedCheckType;
  }

  function createPrimitiveTypeChecker(expectedType) {
    function validate(props, propName, componentName, location, propFullName, secret) {
      var propValue = props[propName];
      var propType = getPropType(propValue);
      if (propType !== expectedType) {
        // `propValue` being instance of, say, date/regexp, pass the 'object'
        // check, but we can offer a more precise error message here rather than
        // 'of type `object`'.
        var preciseType = getPreciseType(propValue);

        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + preciseType + '` supplied to `' + componentName + '`, expected ') + ('`' + expectedType + '`.'));
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createAnyTypeChecker() {
    return createChainableTypeChecker(emptyFunctionThatReturnsNull);
  }

  function createArrayOfTypeChecker(typeChecker) {
    function validate(props, propName, componentName, location, propFullName) {
      if (typeof typeChecker !== 'function') {
        return new PropTypeError('Property `' + propFullName + '` of component `' + componentName + '` has invalid PropType notation inside arrayOf.');
      }
      var propValue = props[propName];
      if (!Array.isArray(propValue)) {
        var propType = getPropType(propValue);
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected an array.'));
      }
      for (var i = 0; i < propValue.length; i++) {
        var error = typeChecker(propValue, i, componentName, location, propFullName + '[' + i + ']', ReactPropTypesSecret);
        if (error instanceof Error) {
          return error;
        }
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createElementTypeChecker() {
    function validate(props, propName, componentName, location, propFullName) {
      var propValue = props[propName];
      if (!isValidElement(propValue)) {
        var propType = getPropType(propValue);
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected a single ReactElement.'));
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createElementTypeTypeChecker() {
    function validate(props, propName, componentName, location, propFullName) {
      var propValue = props[propName];
      if (!ReactIs.isValidElementType(propValue)) {
        var propType = getPropType(propValue);
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected a single ReactElement type.'));
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createInstanceTypeChecker(expectedClass) {
    function validate(props, propName, componentName, location, propFullName) {
      if (!(props[propName] instanceof expectedClass)) {
        var expectedClassName = expectedClass.name || ANONYMOUS;
        var actualClassName = getClassName(props[propName]);
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + actualClassName + '` supplied to `' + componentName + '`, expected ') + ('instance of `' + expectedClassName + '`.'));
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createEnumTypeChecker(expectedValues) {
    if (!Array.isArray(expectedValues)) {
      if (process.env.NODE_ENV !== 'production') {
        if (arguments.length > 1) {
          printWarning(
            'Invalid arguments supplied to oneOf, expected an array, got ' + arguments.length + ' arguments. ' +
            'A common mistake is to write oneOf(x, y, z) instead of oneOf([x, y, z]).'
          );
        } else {
          printWarning('Invalid argument supplied to oneOf, expected an array.');
        }
      }
      return emptyFunctionThatReturnsNull;
    }

    function validate(props, propName, componentName, location, propFullName) {
      var propValue = props[propName];
      for (var i = 0; i < expectedValues.length; i++) {
        if (is(propValue, expectedValues[i])) {
          return null;
        }
      }

      var valuesString = JSON.stringify(expectedValues, function replacer(key, value) {
        var type = getPreciseType(value);
        if (type === 'symbol') {
          return String(value);
        }
        return value;
      });
      return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of value `' + String(propValue) + '` ' + ('supplied to `' + componentName + '`, expected one of ' + valuesString + '.'));
    }
    return createChainableTypeChecker(validate);
  }

  function createObjectOfTypeChecker(typeChecker) {
    function validate(props, propName, componentName, location, propFullName) {
      if (typeof typeChecker !== 'function') {
        return new PropTypeError('Property `' + propFullName + '` of component `' + componentName + '` has invalid PropType notation inside objectOf.');
      }
      var propValue = props[propName];
      var propType = getPropType(propValue);
      if (propType !== 'object') {
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type ' + ('`' + propType + '` supplied to `' + componentName + '`, expected an object.'));
      }
      for (var key in propValue) {
        if (has(propValue, key)) {
          var error = typeChecker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret);
          if (error instanceof Error) {
            return error;
          }
        }
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createUnionTypeChecker(arrayOfTypeCheckers) {
    if (!Array.isArray(arrayOfTypeCheckers)) {
      process.env.NODE_ENV !== 'production' ? printWarning('Invalid argument supplied to oneOfType, expected an instance of array.') : void 0;
      return emptyFunctionThatReturnsNull;
    }

    for (var i = 0; i < arrayOfTypeCheckers.length; i++) {
      var checker = arrayOfTypeCheckers[i];
      if (typeof checker !== 'function') {
        printWarning(
          'Invalid argument supplied to oneOfType. Expected an array of check functions, but ' +
          'received ' + getPostfixForTypeWarning(checker) + ' at index ' + i + '.'
        );
        return emptyFunctionThatReturnsNull;
      }
    }

    function validate(props, propName, componentName, location, propFullName) {
      for (var i = 0; i < arrayOfTypeCheckers.length; i++) {
        var checker = arrayOfTypeCheckers[i];
        if (checker(props, propName, componentName, location, propFullName, ReactPropTypesSecret) == null) {
          return null;
        }
      }

      return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` supplied to ' + ('`' + componentName + '`.'));
    }
    return createChainableTypeChecker(validate);
  }

  function createNodeChecker() {
    function validate(props, propName, componentName, location, propFullName) {
      if (!isNode(props[propName])) {
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` supplied to ' + ('`' + componentName + '`, expected a ReactNode.'));
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createShapeTypeChecker(shapeTypes) {
    function validate(props, propName, componentName, location, propFullName) {
      var propValue = props[propName];
      var propType = getPropType(propValue);
      if (propType !== 'object') {
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type `' + propType + '` ' + ('supplied to `' + componentName + '`, expected `object`.'));
      }
      for (var key in shapeTypes) {
        var checker = shapeTypes[key];
        if (!checker) {
          continue;
        }
        var error = checker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret);
        if (error) {
          return error;
        }
      }
      return null;
    }
    return createChainableTypeChecker(validate);
  }

  function createStrictShapeTypeChecker(shapeTypes) {
    function validate(props, propName, componentName, location, propFullName) {
      var propValue = props[propName];
      var propType = getPropType(propValue);
      if (propType !== 'object') {
        return new PropTypeError('Invalid ' + location + ' `' + propFullName + '` of type `' + propType + '` ' + ('supplied to `' + componentName + '`, expected `object`.'));
      }
      // We need to check all keys in case some are required but missing from
      // props.
      var allKeys = assign({}, props[propName], shapeTypes);
      for (var key in allKeys) {
        var checker = shapeTypes[key];
        if (!checker) {
          return new PropTypeError(
            'Invalid ' + location + ' `' + propFullName + '` key `' + key + '` supplied to `' + componentName + '`.' +
            '\nBad object: ' + JSON.stringify(props[propName], null, '  ') +
            '\nValid keys: ' +  JSON.stringify(Object.keys(shapeTypes), null, '  ')
          );
        }
        var error = checker(propValue, key, componentName, location, propFullName + '.' + key, ReactPropTypesSecret);
        if (error) {
          return error;
        }
      }
      return null;
    }

    return createChainableTypeChecker(validate);
  }

  function isNode(propValue) {
    switch (typeof propValue) {
      case 'number':
      case 'string':
      case 'undefined':
        return true;
      case 'boolean':
        return !propValue;
      case 'object':
        if (Array.isArray(propValue)) {
          return propValue.every(isNode);
        }
        if (propValue === null || isValidElement(propValue)) {
          return true;
        }

        var iteratorFn = getIteratorFn(propValue);
        if (iteratorFn) {
          var iterator = iteratorFn.call(propValue);
          var step;
          if (iteratorFn !== propValue.entries) {
            while (!(step = iterator.next()).done) {
              if (!isNode(step.value)) {
                return false;
              }
            }
          } else {
            // Iterator will provide entry [k,v] tuples rather than values.
            while (!(step = iterator.next()).done) {
              var entry = step.value;
              if (entry) {
                if (!isNode(entry[1])) {
                  return false;
                }
              }
            }
          }
        } else {
          return false;
        }

        return true;
      default:
        return false;
    }
  }

  function isSymbol(propType, propValue) {
    // Native Symbol.
    if (propType === 'symbol') {
      return true;
    }

    // falsy value can't be a Symbol
    if (!propValue) {
      return false;
    }

    // 19.4.3.5 Symbol.prototype[@@toStringTag] === 'Symbol'
    if (propValue['@@toStringTag'] === 'Symbol') {
      return true;
    }

    // Fallback for non-spec compliant Symbols which are polyfilled.
    if (typeof Symbol === 'function' && propValue instanceof Symbol) {
      return true;
    }

    return false;
  }

  // Equivalent of `typeof` but with special handling for array and regexp.
  function getPropType(propValue) {
    var propType = typeof propValue;
    if (Array.isArray(propValue)) {
      return 'array';
    }
    if (propValue instanceof RegExp) {
      // Old webkits (at least until Android 4.0) return 'function' rather than
      // 'object' for typeof a RegExp. We'll normalize this here so that /bla/
      // passes PropTypes.object.
      return 'object';
    }
    if (isSymbol(propType, propValue)) {
      return 'symbol';
    }
    return propType;
  }

  // This handles more types than `getPropType`. Only used for error messages.
  // See `createPrimitiveTypeChecker`.
  function getPreciseType(propValue) {
    if (typeof propValue === 'undefined' || propValue === null) {
      return '' + propValue;
    }
    var propType = getPropType(propValue);
    if (propType === 'object') {
      if (propValue instanceof Date) {
        return 'date';
      } else if (propValue instanceof RegExp) {
        return 'regexp';
      }
    }
    return propType;
  }

  // Returns a string that is postfixed to a warning about an invalid type.
  // For example, "undefined" or "of type array"
  function getPostfixForTypeWarning(value) {
    var type = getPreciseType(value);
    switch (type) {
      case 'array':
      case 'object':
        return 'an ' + type;
      case 'boolean':
      case 'date':
      case 'regexp':
        return 'a ' + type;
      default:
        return type;
    }
  }

  // Returns class name of the object, if any.
  function getClassName(propValue) {
    if (!propValue.constructor || !propValue.constructor.name) {
      return ANONYMOUS;
    }
    return propValue.constructor.name;
  }

  ReactPropTypes.checkPropTypes = checkPropTypes;
  ReactPropTypes.resetWarningCache = checkPropTypes.resetWarningCache;
  ReactPropTypes.PropTypes = ReactPropTypes;

  return ReactPropTypes;
};

}).call(this,require('_process'))
},{"./checkPropTypes":12,"./lib/ReactPropTypesSecret":16,"_process":11,"object-assign":10,"react-is":24}],15:[function(require,module,exports){
(function (process){
/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

if (process.env.NODE_ENV !== 'production') {
  var ReactIs = require('react-is');

  // By explicitly using `prop-types` you are opting into new development behavior.
  // http://fb.me/prop-types-in-prod
  var throwOnDirectAccess = true;
  module.exports = require('./factoryWithTypeCheckers')(ReactIs.isElement, throwOnDirectAccess);
} else {
  // By explicitly using `prop-types` you are opting into new production behavior.
  // http://fb.me/prop-types-in-prod
  module.exports = require('./factoryWithThrowingShims')();
}

}).call(this,require('_process'))
},{"./factoryWithThrowingShims":13,"./factoryWithTypeCheckers":14,"_process":11,"react-is":24}],16:[function(require,module,exports){
/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';

var ReactPropTypesSecret = 'SECRET_DO_NOT_PASS_THIS_OR_YOU_WILL_BE_FIRED';

module.exports = ReactPropTypesSecret;

},{}],17:[function(require,module,exports){
/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

'use strict';

var hasOwnProperty = Object.prototype.hasOwnProperty;

/**
 * inlined Object.is polyfill to avoid requiring consumers ship their own
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
 */
function is(x, y) {
  // SameValue algorithm
  if (x === y) {
    // Steps 1-5, 7-10
    // Steps 6.b-6.e: +0 != -0
    // Added the nonzero y check to make Flow happy, but it is redundant
    return x !== 0 || y !== 0 || 1 / x === 1 / y;
  } else {
    // Step 6.a: NaN == NaN
    return x !== x && y !== y;
  }
}

/**
 * Performs equality by iterating through keys on an object and returning false
 * when any key has values which are not strictly equal between the arguments.
 * Returns true when the values of all keys are strictly equal.
 */
function shallowEqual(objA, objB) {
  if (is(objA, objB)) {
    return true;
  }

  if (typeof objA !== 'object' || objA === null || typeof objB !== 'object' || objB === null) {
    return false;
  }

  var keysA = Object.keys(objA);
  var keysB = Object.keys(objB);

  if (keysA.length !== keysB.length) {
    return false;
  }

  // Test for A's keys different from B.
  for (var i = 0; i < keysA.length; i++) {
    if (!hasOwnProperty.call(objB, keysA[i]) || !is(objA[keysA[i]], objB[keysA[i]])) {
      return false;
    }
  }

  return true;
}

module.exports = {
  shouldComponentUpdate: function(nextProps, nextState) {
    return (
      !shallowEqual(this.props, nextProps) ||
      !shallowEqual(this.state, nextState)
    );
  }
};

},{}],18:[function(require,module,exports){
(function (global){
'use strict';

var _extends = Object.assign || function(target) {
  for (var i = 1; i < arguments.length; i++) {
    var source = arguments[i];
    for (var key in source) {
      if (Object.prototype.hasOwnProperty.call(source, key)) {
        target[key] = source[key];
      }
    }
  }
  return target;
};

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function(obj) {
  return typeof obj;
} : function(obj) {
  return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
};

var __extends = undefined && undefined.__extends || function() {
  var extendStatics = Object.setPrototypeOf || {
    __proto__: []
  }
  instanceof Array && function(d, b) {
    d.__proto__ = b;
  } || function(d, b) {
    for (var p in b) {
      if (b.hasOwnProperty(p)) d[p] = b[p];
    }
  };
  return function(d, b) {
    extendStatics(d, b);

    function __() {
      this.constructor = d;
    }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
  };
}();
Object.defineProperty(exports, '__esModule', {
  value: true
});
var React = require('react');
var SERVER_RENDERED = typeof navigator === 'undefined' || global['PREVENT_CODEMIRROR_RENDER'] === true;
var cm;
if (!SERVER_RENDERED) {
  cm = require('codemirror');
}
var Helper = function() {
  function Helper() {}
  Helper.equals = function(x, y) {
    var _this = this;
    var ok = Object.keys,
      tx = typeof x === 'undefined' ? 'undefined' : _typeof(x),
      ty = typeof y === 'undefined' ? 'undefined' : _typeof(y);
    return x && y && tx === 'object' && tx === ty ? ok(x).length === ok(y).length && ok(x).every(function(key) {
      return _this.equals(x[key], y[key]);
    }) : x === y;
  };
  return Helper;
}();
var Shared = function() {
  function Shared(editor, props) {
    this.editor = editor;
    this.props = props;
  }
  Shared.prototype.delegateCursor = function(position, scroll, focus) {
    var doc = this.editor.getDoc();
    if (focus) {
      this.editor.focus();
    }
    scroll ? doc.setCursor(position) : doc.setCursor(position, null, {
      scroll: false
    });
  };
  Shared.prototype.delegateScroll = function(coordinates) {
    this.editor.scrollTo(coordinates.x, coordinates.y);
  };
  Shared.prototype.delegateSelection = function(ranges, focus) {
    this.editor.setSelections(ranges);
    if (focus) {
      this.editor.focus();
    }
  };
  Shared.prototype.apply = function(props) {
    if (props && props.selection && props.selection.ranges) {
      this.delegateSelection(props.selection.ranges, props.selection.focus || false);
    }
    if (props && props.cursor) {
      this.delegateCursor(props.cursor, props.autoScroll || false, props.autoFocus || false);
    }
    if (props && props.scroll) {
      this.delegateScroll(props.scroll);
    }
  };
  Shared.prototype.applyNext = function(props, next, preserved) {
    if (props && props.selection && props.selection.ranges) {
      if (next && next.selection && next.selection.ranges && !Helper.equals(props.selection.ranges, next.selection.ranges)) {
        this.delegateSelection(next.selection.ranges, next.selection.focus || false);
      }
    }
    if (props && props.cursor) {
      if (next && next.cursor && !Helper.equals(props.cursor, next.cursor)) {
        this.delegateCursor(preserved.cursor || next.cursor, next.autoScroll || false, next.autoCursor || false);
      }
    }
    if (props && props.scroll) {
      if (next && next.scroll && !Helper.equals(props.scroll, next.scroll)) {
        this.delegateScroll(next.scroll);
      }
    }
  };
  Shared.prototype.applyUserDefined = function(props, preserved) {
    if (preserved && preserved.cursor) {
      this.delegateCursor(preserved.cursor, props.autoScroll || false, props.autoFocus || false);
    }
  };
  Shared.prototype.wire = function(props) {
    var _this = this;
    Object.keys(props || {}).filter(function(p) {
      return (/^on/.test(p));
    }).forEach(function(prop) {
      switch (prop) {
        case 'onBlur':
          {
            _this.editor.on('blur', function(cm, event) {
              _this.props.onBlur(_this.editor, event);
            });
          }
          break;
        case 'onContextMenu':
          {
            _this.editor.on('contextmenu', function(cm, event) {
              _this.props.onContextMenu(_this.editor, event);
            });
            break;
          }
        case 'onCopy':
          {
            _this.editor.on('copy', function(cm, event) {
              _this.props.onCopy(_this.editor, event);
            });
            break;
          }
        case 'onCursor':
          {
            _this.editor.on('cursorActivity', function(cm) {
              _this.props.onCursor(_this.editor, _this.editor.getCursor());
            });
          }
          break;
        case 'onCursorActivity':
          {
            _this.editor.on('cursorActivity', function(cm) {
              _this.props.onCursorActivity(_this.editor);
            });
          }
          break;
        case 'onCut':
          {
            _this.editor.on('cut', function(cm) {
              _this.props.onCut(_this.editor, event);
            });
            break;
          }
        case 'onDblClick':
          {
            _this.editor.on('dblclick', function(cm) {
              _this.props.onDblClick(_this.editor, event);
            });
            break;
          }
        case 'onDragEnter':
          {
            _this.editor.on('dragenter', function(cm, event) {
              _this.props.onDragEnter(_this.editor, event);
            });
          }
          break;
        case 'onDragLeave':
          {
            _this.editor.on('dragleave', function(cm) {
              _this.props.onDragLeave(_this.editor, event);
            });
            break;
          }
        case 'onDragOver':
          {
            _this.editor.on('dragover', function(cm, event) {
              _this.props.onDragOver(_this.editor, event);
            });
          }
          break;
        case 'onDragStart':
          {
            _this.editor.on('dragstart', function(cm) {
              _this.props.onDragStart(_this.editor, event);
            });
            break;
          }
        case 'onDrop':
          {
            _this.editor.on('drop', function(cm, event) {
              _this.props.onDrop(_this.editor, event);
            });
          }
          break;
        case 'onFocus':
          {
            _this.editor.on('focus', function(cm, event) {
              _this.props.onFocus(_this.editor, event);
            });
          }
          break;
        case 'onGutterClick':
          {
            _this.editor.on('gutterClick', function(cm, lineNumber, gutter, event) {
              _this.props.onGutterClick(_this.editor, lineNumber, gutter, event);
            });
          }
          break;
        case 'onKeyDown':
          {
            _this.editor.on('keydown', function(cm, event) {
              _this.props.onKeyDown(_this.editor, event);
            });
          }
          break;
        case 'onKeyPress':
          {
            _this.editor.on('keypress', function(cm, event) {
              _this.props.onKeyPress(_this.editor, event);
            });
          }
          break;
        case 'onKeyUp':
          {
            _this.editor.on('keyup', function(cm, event) {
              _this.props.onKeyUp(_this.editor, event);
            });
          }
          break;
        case 'onMouseDown':
          {
            _this.editor.on('mousedown', function(cm) {
              _this.props.onMouseDown(_this.editor, event);
            });
            break;
          }
        case 'onPaste':
          {
            _this.editor.on('paste', function(cm) {
              _this.props.onPaste(_this.editor, event);
            });
            break;
          }
        case 'onScroll':
          {
            _this.editor.on('scroll', function(cm) {
              _this.props.onScroll(_this.editor, _this.editor.getScrollInfo());
            });
          }
          break;
        case 'onSelection':
          {
            _this.editor.on('beforeSelectionChange', function(cm, data) {
              _this.props.onSelection(_this.editor, data);
            });
          }
          break;
        case 'onTouchStart':
          {
            _this.editor.on('touchstart', function(cm) {
              _this.props.onTouchStart(_this.editor, event);
            });
            break;
          }
        case 'onUpdate':
          {
            _this.editor.on('update', function(cm) {
              _this.props.onUpdate(_this.editor);
            });
          }
          break;
        case 'onViewportChange':
          {
            _this.editor.on('viewportChange', function(cm, from, to) {
              _this.props.onViewportChange(_this.editor, from, to);
            });
          }
          break;
      }
    });
  };
  return Shared;
}();
var Controlled = function(_super) {
  __extends(Controlled, _super);

  function Controlled(props) {
    var _this = _super.call(this, props) || this;
    if (SERVER_RENDERED) return _this;
    _this.applied = false;
    _this.appliedNext = false;
    _this.appliedUserDefined = false;
    _this.deferred = null;
    _this.emulating = false;
    _this.hydrated = false;
    _this.initCb = function() {
      if (_this.props.editorDidConfigure) {
        _this.props.editorDidConfigure(_this.editor);
      }
    };
    _this.mounted = false;
    return _this;
  }
  Controlled.prototype.hydrate = function(props) {
    var _this = this;
    var userDefinedOptions = _extends({}, cm.defaults, this.editor.options, props.options || {});
    var optionDelta = Object.keys(userDefinedOptions).some(function(key) {
      return _this.editor.getOption(key) !== userDefinedOptions[key];
    });
    if (optionDelta) {
      Object.keys(userDefinedOptions).forEach(function(key) {
        if (props.options.hasOwnProperty(key)) {
          if (_this.editor.getOption(key) !== userDefinedOptions[key]) {
            _this.editor.setOption(key, userDefinedOptions[key]);
            _this.mirror.setOption(key, userDefinedOptions[key]);
          }
        }
      });
    }
    if (!this.hydrated) {
      if (!this.mounted) {
        this.initChange(props.value || '');
      } else {
        if (this.deferred) {
          this.resolveChange();
        } else {
          this.initChange(props.value || '');
        }
      }
    }
    this.hydrated = true;
  };
  Controlled.prototype.initChange = function(value) {
    this.emulating = true;
    var lastLine = this.editor.lastLine();
    var lastChar = this.editor.getLine(this.editor.lastLine()).length;
    this.editor.replaceRange(value || '', {
      line: 0,
      ch: 0
    }, {
      line: lastLine,
      ch: lastChar
    });
    this.mirror.setValue(value);
    this.editor.clearHistory();
    this.mirror.clearHistory();
    this.emulating = false;
  };
  Controlled.prototype.resolveChange = function() {
    this.emulating = true;
    if (this.deferred.origin === 'undo') {
      this.editor.undo();
    } else if (this.deferred.origin === 'redo') {
      this.editor.redo();
    } else {
      this.editor.replaceRange(this.deferred.text, this.deferred.from, this.deferred.to, this.deferred.origin);
    }
    this.emulating = false;
    this.deferred = null;
  };
  Controlled.prototype.mirrorChange = function(deferred) {
    if (deferred.origin === 'undo') {
      this.editor.setHistory(this.mirror.getHistory());
      this.mirror.undo();
    } else if (deferred.origin === 'redo') {
      this.editor.setHistory(this.mirror.getHistory());
      this.mirror.redo();
    } else {
      this.mirror.replaceRange(deferred.text, deferred.from, deferred.to, deferred.origin);
    }
    return this.mirror.getValue();
  };
  Controlled.prototype.componentWillMount = function() {
    if (SERVER_RENDERED) return;
    if (this.props.editorWillMount) {
      this.props.editorWillMount();
    }
  };
  Controlled.prototype.componentDidMount = function() {
    var _this = this;
    if (SERVER_RENDERED) return;
    if (this.props.defineMode) {
      if (this.props.defineMode.name && this.props.defineMode.fn) {
        cm.defineMode(this.props.defineMode.name, this.props.defineMode.fn);
      }
    }
    this.editor = cm(this.ref);
    this.shared = new Shared(this.editor, this.props);
    this.mirror = cm(function() {});
    this.editor.on('electricInput', function() {
      _this.mirror.setHistory(_this.editor.getHistory());
    });
    this.editor.on('cursorActivity', function() {
      _this.mirror.setCursor(_this.editor.getCursor());
    });
    this.editor.on('beforeChange', function(cm, data) {
      if (_this.emulating) {
        return;
      }
      data.cancel();
      _this.deferred = data;
      var phantomChange = _this.mirrorChange(_this.deferred);
      if (_this.props.onBeforeChange) _this.props.onBeforeChange(_this.editor, _this.deferred, phantomChange);
    });
    this.editor.on('change', function(cm, data) {
      if (!_this.mounted) {
        return;
      }
      if (_this.props.onChange) {
        _this.props.onChange(_this.editor, data, _this.editor.getValue());
      }
    });
    this.hydrate(this.props);
    this.shared.apply(this.props);
    this.applied = true;
    this.mounted = true;
    this.shared.wire(this.props);
    if (this.props.editorDidMount) {
      this.props.editorDidMount(this.editor, this.editor.getValue(), this.initCb);
    }
  };
  Controlled.prototype.componentWillReceiveProps = function(nextProps) {
    if (SERVER_RENDERED) return;
    var preserved = {
      cursor: null
    };
    if (nextProps.value !== this.props.value) {
      this.hydrated = false;
    }
    if (!this.props.autoCursor && this.props.autoCursor !== undefined) {
      preserved.cursor = this.editor.getCursor();
    }
    this.hydrate(nextProps);
    if (!this.appliedNext) {
      this.shared.applyNext(this.props, nextProps, preserved);
      this.appliedNext = true;
    }
    this.shared.applyUserDefined(this.props, preserved);
    this.appliedUserDefined = true;
  };
  Controlled.prototype.componentWillUnmount = function() {
    if (SERVER_RENDERED) return;
    if (this.props.editorWillUnmount) {
      this.props.editorWillUnmount(cm);
    }
  };
  Controlled.prototype.shouldComponentUpdate = function(nextProps, nextState) {
    return !SERVER_RENDERED;
  };
  Controlled.prototype.render = function() {
    var _this = this;
    if (SERVER_RENDERED) return null;
    var className = this.props.className ? 'react-codemirror2 ' + this.props.className : 'react-codemirror2';
    return React.createElement('div', {
      className: className,
      ref: function ref(self) {
        return _this.ref = self;
      }
    });
  };
  return Controlled;
}(React.Component);
exports.Controlled = Controlled;
var UnControlled = function(_super) {
  __extends(UnControlled, _super);

  function UnControlled(props) {
    var _this = _super.call(this, props) || this;
    if (SERVER_RENDERED) return _this;
    _this.applied = false;
    _this.appliedUserDefined = false;
    _this.continueChange = false;
    _this.detached = false;
    _this.hydrated = false;
    _this.initCb = function() {
      if (_this.props.editorDidConfigure) {
        _this.props.editorDidConfigure(_this.editor);
      }
    };
    _this.mounted = false;
    _this.onBeforeChangeCb = function() {
      _this.continueChange = true;
    };
    return _this;
  }
  UnControlled.prototype.hydrate = function(props) {
    var _this = this;
    var userDefinedOptions = _extends({}, cm.defaults, this.editor.options, props.options || {});
    var optionDelta = Object.keys(userDefinedOptions).some(function(key) {
      return _this.editor.getOption(key) !== userDefinedOptions[key];
    });
    if (optionDelta) {
      Object.keys(userDefinedOptions).forEach(function(key) {
        if (props.options.hasOwnProperty(key)) {
          if (_this.editor.getOption(key) !== userDefinedOptions[key]) {
            _this.editor.setOption(key, userDefinedOptions[key]);
          }
        }
      });
    }
    if (!this.hydrated) {
      var lastLine = this.editor.lastLine();
      var lastChar = this.editor.getLine(this.editor.lastLine()).length;
      this.editor.replaceRange(props.value || '', {
        line: 0,
        ch: 0
      }, {
        line: lastLine,
        ch: lastChar
      });
    }
    this.hydrated = true;
  };
  UnControlled.prototype.componentWillMount = function() {
    if (SERVER_RENDERED) return;
    if (this.props.editorWillMount) {
      this.props.editorWillMount();
    }
  };
  UnControlled.prototype.componentDidMount = function() {
    var _this = this;
    if (SERVER_RENDERED) return;
    this.detached = this.props.detach === true;
    if (this.props.defineMode) {
      if (this.props.defineMode.name && this.props.defineMode.fn) {
        cm.defineMode(this.props.defineMode.name, this.props.defineMode.fn);
      }
    }
    this.editor = cm(this.ref);
    this.shared = new Shared(this.editor, this.props);
    this.editor.on('beforeChange', function(cm, data) {
      if (_this.props.onBeforeChange) {
        _this.props.onBeforeChange(_this.editor, data, _this.editor.getValue(), _this.onBeforeChangeCb);
      }
    });
    this.editor.on('change', function(cm, data) {
      if (!_this.mounted || !_this.props.onChange) {
        return;
      }
      if (_this.props.onBeforeChange) {
        if (_this.continueChange) {
          _this.props.onChange(_this.editor, data, _this.editor.getValue());
        }
      } else {
        _this.props.onChange(_this.editor, data, _this.editor.getValue());
      }
    });
    this.hydrate(this.props);
    this.shared.apply(this.props);
    this.applied = true;
    this.mounted = true;
    this.shared.wire(this.props);
    this.editor.clearHistory();
    if (this.props.editorDidMount) {
      this.props.editorDidMount(this.editor, this.editor.getValue(), this.initCb);
    }
  };
  UnControlled.prototype.componentWillReceiveProps = function(nextProps) {
    if (this.detached && nextProps.detach === false) {
      this.detached = false;
      if (this.props.editorDidAttach) {
        this.props.editorDidAttach(this.editor);
      }
    }
    if (!this.detached && nextProps.detach === true) {
      this.detached = true;
      if (this.props.editorDidDetach) {
        this.props.editorDidDetach(this.editor);
      }
    }
    if (SERVER_RENDERED || this.detached) return;
    var preserved = {
      cursor: null
    };
    if (nextProps.value !== this.props.value) {
      this.hydrated = false;
      this.applied = false;
      this.appliedUserDefined = false;
    }
    if (!this.props.autoCursor && this.props.autoCursor !== undefined) {
      preserved.cursor = this.editor.getCursor();
    }
    this.hydrate(nextProps);
    if (!this.applied) {
      this.shared.apply(this.props);
      this.applied = true;
    }
    if (!this.appliedUserDefined) {
      this.shared.applyUserDefined(this.props, preserved);
      this.appliedUserDefined = true;
    }
  };
  UnControlled.prototype.componentWillUnmount = function() {
    if (SERVER_RENDERED) return;
    if (this.props.editorWillUnmount) {
      this.props.editorWillUnmount(cm);
    }
  };
  UnControlled.prototype.shouldComponentUpdate = function(nextProps, nextState) {
    var update = true;
    if (SERVER_RENDERED) update = false;
    if (this.detached) update = false;
    return update;
  };
  UnControlled.prototype.render = function() {
    var _this = this;
    if (SERVER_RENDERED) return null;
    var className = this.props.className ? 'react-codemirror2 ' + this.props.className : 'react-codemirror2';
    return React.createElement('div', {
      className: className,
      ref: function ref(self) {
        return _this.ref = self;
      }
    });
  };
  return UnControlled;
}(React.Component);
exports.UnControlled = UnControlled;
}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"codemirror":3,"react":35}],19:[function(require,module,exports){
(function (process){
/** @license React v16.11.0
 * react-dom.development.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';



if (process.env.NODE_ENV !== "production") {
  (function() {
'use strict';

var React = require('react');
var _assign = require('object-assign');
var Scheduler = require('scheduler');
var checkPropTypes = require('prop-types/checkPropTypes');
var tracing = require('scheduler/tracing');

// Do not require this module directly! Use normal `invariant` calls with
// template literal strings. The messages will be replaced with error codes
// during build.

/**
 * Use invariant() to assert state which your program assumes to be true.
 *
 * Provide sprintf-style format (only %s is supported) and arguments
 * to provide information about what broke and what you were
 * expecting.
 *
 * The invariant message will be stripped in production, but the invariant
 * will remain to ensure logic does not differ in production.
 */

if (!React) {
  {
    throw Error("ReactDOM was loaded before React. Make sure you load the React package before loading ReactDOM.");
  }
}

/**
 * Injectable ordering of event plugins.
 */
var eventPluginOrder = null;
/**
 * Injectable mapping from names to event plugin modules.
 */

var namesToPlugins = {};
/**
 * Recomputes the plugin list using the injected plugins and plugin ordering.
 *
 * @private
 */

function recomputePluginOrdering() {
  if (!eventPluginOrder) {
    // Wait until an `eventPluginOrder` is injected.
    return;
  }

  for (var pluginName in namesToPlugins) {
    var pluginModule = namesToPlugins[pluginName];
    var pluginIndex = eventPluginOrder.indexOf(pluginName);

    if (!(pluginIndex > -1)) {
      {
        throw Error("EventPluginRegistry: Cannot inject event plugins that do not exist in the plugin ordering, `" + pluginName + "`.");
      }
    }

    if (plugins[pluginIndex]) {
      continue;
    }

    if (!pluginModule.extractEvents) {
      {
        throw Error("EventPluginRegistry: Event plugins must implement an `extractEvents` method, but `" + pluginName + "` does not.");
      }
    }

    plugins[pluginIndex] = pluginModule;
    var publishedEvents = pluginModule.eventTypes;

    for (var eventName in publishedEvents) {
      if (!publishEventForPlugin(publishedEvents[eventName], pluginModule, eventName)) {
        {
          throw Error("EventPluginRegistry: Failed to publish event `" + eventName + "` for plugin `" + pluginName + "`.");
        }
      }
    }
  }
}
/**
 * Publishes an event so that it can be dispatched by the supplied plugin.
 *
 * @param {object} dispatchConfig Dispatch configuration for the event.
 * @param {object} PluginModule Plugin publishing the event.
 * @return {boolean} True if the event was successfully published.
 * @private
 */


function publishEventForPlugin(dispatchConfig, pluginModule, eventName) {
  if (!!eventNameDispatchConfigs.hasOwnProperty(eventName)) {
    {
      throw Error("EventPluginHub: More than one plugin attempted to publish the same event name, `" + eventName + "`.");
    }
  }

  eventNameDispatchConfigs[eventName] = dispatchConfig;
  var phasedRegistrationNames = dispatchConfig.phasedRegistrationNames;

  if (phasedRegistrationNames) {
    for (var phaseName in phasedRegistrationNames) {
      if (phasedRegistrationNames.hasOwnProperty(phaseName)) {
        var phasedRegistrationName = phasedRegistrationNames[phaseName];
        publishRegistrationName(phasedRegistrationName, pluginModule, eventName);
      }
    }

    return true;
  } else if (dispatchConfig.registrationName) {
    publishRegistrationName(dispatchConfig.registrationName, pluginModule, eventName);
    return true;
  }

  return false;
}
/**
 * Publishes a registration name that is used to identify dispatched events.
 *
 * @param {string} registrationName Registration name to add.
 * @param {object} PluginModule Plugin publishing the event.
 * @private
 */


function publishRegistrationName(registrationName, pluginModule, eventName) {
  if (!!registrationNameModules[registrationName]) {
    {
      throw Error("EventPluginHub: More than one plugin attempted to publish the same registration name, `" + registrationName + "`.");
    }
  }

  registrationNameModules[registrationName] = pluginModule;
  registrationNameDependencies[registrationName] = pluginModule.eventTypes[eventName].dependencies;

  {
    var lowerCasedName = registrationName.toLowerCase();
    possibleRegistrationNames[lowerCasedName] = registrationName;

    if (registrationName === 'onDoubleClick') {
      possibleRegistrationNames.ondblclick = registrationName;
    }
  }
}
/**
 * Registers plugins so that they can extract and dispatch events.
 *
 * @see {EventPluginHub}
 */

/**
 * Ordered list of injected plugins.
 */


var plugins = [];
/**
 * Mapping from event name to dispatch config
 */

var eventNameDispatchConfigs = {};
/**
 * Mapping from registration name to plugin module
 */

var registrationNameModules = {};
/**
 * Mapping from registration name to event name
 */

var registrationNameDependencies = {};
/**
 * Mapping from lowercase registration names to the properly cased version,
 * used to warn in the case of missing event handlers. Available
 * only in true.
 * @type {Object}
 */

var possibleRegistrationNames = {}; // Trust the developer to only use possibleRegistrationNames in true

/**
 * Injects an ordering of plugins (by plugin name). This allows the ordering
 * to be decoupled from injection of the actual plugins so that ordering is
 * always deterministic regardless of packaging, on-the-fly injection, etc.
 *
 * @param {array} InjectedEventPluginOrder
 * @internal
 * @see {EventPluginHub.injection.injectEventPluginOrder}
 */

function injectEventPluginOrder(injectedEventPluginOrder) {
  if (!!eventPluginOrder) {
    {
      throw Error("EventPluginRegistry: Cannot inject event plugin ordering more than once. You are likely trying to load more than one copy of React.");
    }
  } // Clone the ordering so it cannot be dynamically mutated.


  eventPluginOrder = Array.prototype.slice.call(injectedEventPluginOrder);
  recomputePluginOrdering();
}
/**
 * Injects plugins to be used by `EventPluginHub`. The plugin names must be
 * in the ordering injected by `injectEventPluginOrder`.
 *
 * Plugins can be injected as part of page initialization or on-the-fly.
 *
 * @param {object} injectedNamesToPlugins Map from names to plugin modules.
 * @internal
 * @see {EventPluginHub.injection.injectEventPluginsByName}
 */

function injectEventPluginsByName(injectedNamesToPlugins) {
  var isOrderingDirty = false;

  for (var pluginName in injectedNamesToPlugins) {
    if (!injectedNamesToPlugins.hasOwnProperty(pluginName)) {
      continue;
    }

    var pluginModule = injectedNamesToPlugins[pluginName];

    if (!namesToPlugins.hasOwnProperty(pluginName) || namesToPlugins[pluginName] !== pluginModule) {
      if (!!namesToPlugins[pluginName]) {
        {
          throw Error("EventPluginRegistry: Cannot inject two different event plugins using the same name, `" + pluginName + "`.");
        }
      }

      namesToPlugins[pluginName] = pluginModule;
      isOrderingDirty = true;
    }
  }

  if (isOrderingDirty) {
    recomputePluginOrdering();
  }
}

var invokeGuardedCallbackImpl = function (name, func, context, a, b, c, d, e, f) {
  var funcArgs = Array.prototype.slice.call(arguments, 3);

  try {
    func.apply(context, funcArgs);
  } catch (error) {
    this.onError(error);
  }
};

{
  // In DEV mode, we swap out invokeGuardedCallback for a special version
  // that plays more nicely with the browser's DevTools. The idea is to preserve
  // "Pause on exceptions" behavior. Because React wraps all user-provided
  // functions in invokeGuardedCallback, and the production version of
  // invokeGuardedCallback uses a try-catch, all user exceptions are treated
  // like caught exceptions, and the DevTools won't pause unless the developer
  // takes the extra step of enabling pause on caught exceptions. This is
  // unintuitive, though, because even though React has caught the error, from
  // the developer's perspective, the error is uncaught.
  //
  // To preserve the expected "Pause on exceptions" behavior, we don't use a
  // try-catch in DEV. Instead, we synchronously dispatch a fake event to a fake
  // DOM node, and call the user-provided callback from inside an event handler
  // for that fake event. If the callback throws, the error is "captured" using
  // a global event handler. But because the error happens in a different
  // event loop context, it does not interrupt the normal program flow.
  // Effectively, this gives us try-catch behavior without actually using
  // try-catch. Neat!
  // Check that the browser supports the APIs we need to implement our special
  // DEV version of invokeGuardedCallback
  if (typeof window !== 'undefined' && typeof window.dispatchEvent === 'function' && typeof document !== 'undefined' && typeof document.createEvent === 'function') {
    var fakeNode = document.createElement('react');

    var invokeGuardedCallbackDev = function (name, func, context, a, b, c, d, e, f) {
      // If document doesn't exist we know for sure we will crash in this method
      // when we call document.createEvent(). However this can cause confusing
      // errors: https://github.com/facebookincubator/create-react-app/issues/3482
      // So we preemptively throw with a better message instead.
      if (!(typeof document !== 'undefined')) {
        {
          throw Error("The `document` global was defined when React was initialized, but is not defined anymore. This can happen in a test environment if a component schedules an update from an asynchronous callback, but the test has already finished running. To solve this, you can either unmount the component at the end of your test (and ensure that any asynchronous operations get canceled in `componentWillUnmount`), or you can change the test itself to be asynchronous.");
        }
      }

      var evt = document.createEvent('Event'); // Keeps track of whether the user-provided callback threw an error. We
      // set this to true at the beginning, then set it to false right after
      // calling the function. If the function errors, `didError` will never be
      // set to false. This strategy works even if the browser is flaky and
      // fails to call our global error handler, because it doesn't rely on
      // the error event at all.

      var didError = true; // Keeps track of the value of window.event so that we can reset it
      // during the callback to let user code access window.event in the
      // browsers that support it.

      var windowEvent = window.event; // Keeps track of the descriptor of window.event to restore it after event
      // dispatching: https://github.com/facebook/react/issues/13688

      var windowEventDescriptor = Object.getOwnPropertyDescriptor(window, 'event'); // Create an event handler for our fake event. We will synchronously
      // dispatch our fake event using `dispatchEvent`. Inside the handler, we
      // call the user-provided callback.

      var funcArgs = Array.prototype.slice.call(arguments, 3);

      function callCallback() {
        // We immediately remove the callback from event listeners so that
        // nested `invokeGuardedCallback` calls do not clash. Otherwise, a
        // nested call would trigger the fake event handlers of any call higher
        // in the stack.
        fakeNode.removeEventListener(evtType, callCallback, false); // We check for window.hasOwnProperty('event') to prevent the
        // window.event assignment in both IE <= 10 as they throw an error
        // "Member not found" in strict mode, and in Firefox which does not
        // support window.event.

        if (typeof window.event !== 'undefined' && window.hasOwnProperty('event')) {
          window.event = windowEvent;
        }

        func.apply(context, funcArgs);
        didError = false;
      } // Create a global error event handler. We use this to capture the value
      // that was thrown. It's possible that this error handler will fire more
      // than once; for example, if non-React code also calls `dispatchEvent`
      // and a handler for that event throws. We should be resilient to most of
      // those cases. Even if our error event handler fires more than once, the
      // last error event is always used. If the callback actually does error,
      // we know that the last error event is the correct one, because it's not
      // possible for anything else to have happened in between our callback
      // erroring and the code that follows the `dispatchEvent` call below. If
      // the callback doesn't error, but the error event was fired, we know to
      // ignore it because `didError` will be false, as described above.


      var error; // Use this to track whether the error event is ever called.

      var didSetError = false;
      var isCrossOriginError = false;

      function handleWindowError(event) {
        error = event.error;
        didSetError = true;

        if (error === null && event.colno === 0 && event.lineno === 0) {
          isCrossOriginError = true;
        }

        if (event.defaultPrevented) {
          // Some other error handler has prevented default.
          // Browsers silence the error report if this happens.
          // We'll remember this to later decide whether to log it or not.
          if (error != null && typeof error === 'object') {
            try {
              error._suppressLogging = true;
            } catch (inner) {// Ignore.
            }
          }
        }
      } // Create a fake event type.


      var evtType = "react-" + (name ? name : 'invokeguardedcallback'); // Attach our event handlers

      window.addEventListener('error', handleWindowError);
      fakeNode.addEventListener(evtType, callCallback, false); // Synchronously dispatch our fake event. If the user-provided function
      // errors, it will trigger our global error handler.

      evt.initEvent(evtType, false, false);
      fakeNode.dispatchEvent(evt);

      if (windowEventDescriptor) {
        Object.defineProperty(window, 'event', windowEventDescriptor);
      }

      if (didError) {
        if (!didSetError) {
          // The callback errored, but the error event never fired.
          error = new Error('An error was thrown inside one of your components, but React ' + "doesn't know what it was. This is likely due to browser " + 'flakiness. React does its best to preserve the "Pause on ' + 'exceptions" behavior of the DevTools, which requires some ' + "DEV-mode only tricks. It's possible that these don't work in " + 'your browser. Try triggering the error in production mode, ' + 'or switching to a modern browser. If you suspect that this is ' + 'actually an issue with React, please file an issue.');
        } else if (isCrossOriginError) {
          error = new Error("A cross-origin error was thrown. React doesn't have access to " + 'the actual error object in development. ' + 'See https://fb.me/react-crossorigin-error for more information.');
        }

        this.onError(error);
      } // Remove our event listeners


      window.removeEventListener('error', handleWindowError);
    };

    invokeGuardedCallbackImpl = invokeGuardedCallbackDev;
  }
}

var invokeGuardedCallbackImpl$1 = invokeGuardedCallbackImpl;

var hasError = false;
var caughtError = null; // Used by event system to capture/rethrow the first error.

var hasRethrowError = false;
var rethrowError = null;
var reporter = {
  onError: function (error) {
    hasError = true;
    caughtError = error;
  }
};
/**
 * Call a function while guarding against errors that happens within it.
 * Returns an error if it throws, otherwise null.
 *
 * In production, this is implemented using a try-catch. The reason we don't
 * use a try-catch directly is so that we can swap out a different
 * implementation in DEV mode.
 *
 * @param {String} name of the guard to use for logging or debugging
 * @param {Function} func The function to invoke
 * @param {*} context The context to use when calling the function
 * @param {...*} args Arguments for function
 */

function invokeGuardedCallback(name, func, context, a, b, c, d, e, f) {
  hasError = false;
  caughtError = null;
  invokeGuardedCallbackImpl$1.apply(reporter, arguments);
}
/**
 * Same as invokeGuardedCallback, but instead of returning an error, it stores
 * it in a global so it can be rethrown by `rethrowCaughtError` later.
 * TODO: See if caughtError and rethrowError can be unified.
 *
 * @param {String} name of the guard to use for logging or debugging
 * @param {Function} func The function to invoke
 * @param {*} context The context to use when calling the function
 * @param {...*} args Arguments for function
 */

function invokeGuardedCallbackAndCatchFirstError(name, func, context, a, b, c, d, e, f) {
  invokeGuardedCallback.apply(this, arguments);

  if (hasError) {
    var error = clearCaughtError();

    if (!hasRethrowError) {
      hasRethrowError = true;
      rethrowError = error;
    }
  }
}
/**
 * During execution of guarded functions we will capture the first error which
 * we will rethrow to be handled by the top level error handler.
 */

function rethrowCaughtError() {
  if (hasRethrowError) {
    var error = rethrowError;
    hasRethrowError = false;
    rethrowError = null;
    throw error;
  }
}
function hasCaughtError() {
  return hasError;
}
function clearCaughtError() {
  if (hasError) {
    var error = caughtError;
    hasError = false;
    caughtError = null;
    return error;
  } else {
    {
      {
        throw Error("clearCaughtError was called but no error was captured. This error is likely caused by a bug in React. Please file an issue.");
      }
    }
  }
}

/**
 * Similar to invariant but only logs a warning if the condition is not met.
 * This can be used to log issues in development environments in critical
 * paths. Removing the logging code for production environments will keep the
 * same logic and follow the same code paths.
 */
var warningWithoutStack = function () {};

{
  warningWithoutStack = function (condition, format) {
    for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
      args[_key - 2] = arguments[_key];
    }

    if (format === undefined) {
      throw new Error('`warningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument');
    }

    if (args.length > 8) {
      // Check before the condition to catch violations early.
      throw new Error('warningWithoutStack() currently supports at most 8 arguments.');
    }

    if (condition) {
      return;
    }

    if (typeof console !== 'undefined') {
      var argsWithFormat = args.map(function (item) {
        return '' + item;
      });
      argsWithFormat.unshift('Warning: ' + format); // We intentionally don't use spread (or .apply) directly because it
      // breaks IE9: https://github.com/facebook/react/issues/13610

      Function.prototype.apply.call(console.error, console, argsWithFormat);
    }

    try {
      // --- Welcome to debugging React ---
      // This error was thrown as a convenience so that you can use this stack
      // to find the callsite that caused this warning to fire.
      var argIndex = 0;
      var message = 'Warning: ' + format.replace(/%s/g, function () {
        return args[argIndex++];
      });
      throw new Error(message);
    } catch (x) {}
  };
}

var warningWithoutStack$1 = warningWithoutStack;

var getFiberCurrentPropsFromNode = null;
var getInstanceFromNode = null;
var getNodeFromInstance = null;
function setComponentTree(getFiberCurrentPropsFromNodeImpl, getInstanceFromNodeImpl, getNodeFromInstanceImpl) {
  getFiberCurrentPropsFromNode = getFiberCurrentPropsFromNodeImpl;
  getInstanceFromNode = getInstanceFromNodeImpl;
  getNodeFromInstance = getNodeFromInstanceImpl;

  {
    !(getNodeFromInstance && getInstanceFromNode) ? warningWithoutStack$1(false, 'EventPluginUtils.setComponentTree(...): Injected ' + 'module is missing getNodeFromInstance or getInstanceFromNode.') : void 0;
  }
}
var validateEventDispatches;

{
  validateEventDispatches = function (event) {
    var dispatchListeners = event._dispatchListeners;
    var dispatchInstances = event._dispatchInstances;
    var listenersIsArr = Array.isArray(dispatchListeners);
    var listenersLen = listenersIsArr ? dispatchListeners.length : dispatchListeners ? 1 : 0;
    var instancesIsArr = Array.isArray(dispatchInstances);
    var instancesLen = instancesIsArr ? dispatchInstances.length : dispatchInstances ? 1 : 0;
    !(instancesIsArr === listenersIsArr && instancesLen === listenersLen) ? warningWithoutStack$1(false, 'EventPluginUtils: Invalid `event`.') : void 0;
  };
}
/**
 * Dispatch the event to the listener.
 * @param {SyntheticEvent} event SyntheticEvent to handle
 * @param {function} listener Application-level callback
 * @param {*} inst Internal component instance
 */


function executeDispatch(event, listener, inst) {
  var type = event.type || 'unknown-event';
  event.currentTarget = getNodeFromInstance(inst);
  invokeGuardedCallbackAndCatchFirstError(type, listener, undefined, event);
  event.currentTarget = null;
}
/**
 * Standard/simple iteration through an event's collected dispatches.
 */

function executeDispatchesInOrder(event) {
  var dispatchListeners = event._dispatchListeners;
  var dispatchInstances = event._dispatchInstances;

  {
    validateEventDispatches(event);
  }

  if (Array.isArray(dispatchListeners)) {
    for (var i = 0; i < dispatchListeners.length; i++) {
      if (event.isPropagationStopped()) {
        break;
      } // Listeners and Instances are two parallel arrays that are always in sync.


      executeDispatch(event, dispatchListeners[i], dispatchInstances[i]);
    }
  } else if (dispatchListeners) {
    executeDispatch(event, dispatchListeners, dispatchInstances);
  }

  event._dispatchListeners = null;
  event._dispatchInstances = null;
}
/**
 * @see executeDispatchesInOrderStopAtTrueImpl
 */



/**
 * Execution of a "direct" dispatch - there must be at most one dispatch
 * accumulated on the event or it is considered an error. It doesn't really make
 * sense for an event with multiple dispatches (bubbled) to keep track of the
 * return values at each dispatch execution, but it does tend to make sense when
 * dealing with "direct" dispatches.
 *
 * @return {*} The return value of executing the single dispatch.
 */


/**
 * @param {SyntheticEvent} event
 * @return {boolean} True iff number of dispatches accumulated is greater than 0.
 */

/**
 * Accumulates items that must not be null or undefined into the first one. This
 * is used to conserve memory by avoiding array allocations, and thus sacrifices
 * API cleanness. Since `current` can be null before being passed in and not
 * null after this function, make sure to assign it back to `current`:
 *
 * `a = accumulateInto(a, b);`
 *
 * This API should be sparingly used. Try `accumulate` for something cleaner.
 *
 * @return {*|array<*>} An accumulation of items.
 */

function accumulateInto(current, next) {
  if (!(next != null)) {
    {
      throw Error("accumulateInto(...): Accumulated items must not be null or undefined.");
    }
  }

  if (current == null) {
    return next;
  } // Both are not empty. Warning: Never call x.concat(y) when you are not
  // certain that x is an Array (x could be a string with concat method).


  if (Array.isArray(current)) {
    if (Array.isArray(next)) {
      current.push.apply(current, next);
      return current;
    }

    current.push(next);
    return current;
  }

  if (Array.isArray(next)) {
    // A bit too dangerous to mutate `next`.
    return [current].concat(next);
  }

  return [current, next];
}

/**
 * @param {array} arr an "accumulation" of items which is either an Array or
 * a single item. Useful when paired with the `accumulate` module. This is a
 * simple utility that allows us to reason about a collection of items, but
 * handling the case when there is exactly one item (and we do not need to
 * allocate an array).
 * @param {function} cb Callback invoked with each element or a collection.
 * @param {?} [scope] Scope used as `this` in a callback.
 */
function forEachAccumulated(arr, cb, scope) {
  if (Array.isArray(arr)) {
    arr.forEach(cb, scope);
  } else if (arr) {
    cb.call(scope, arr);
  }
}

/**
 * Internal queue of events that have accumulated their dispatches and are
 * waiting to have their dispatches executed.
 */

var eventQueue = null;
/**
 * Dispatches an event and releases it back into the pool, unless persistent.
 *
 * @param {?object} event Synthetic event to be dispatched.
 * @private
 */

var executeDispatchesAndRelease = function (event) {
  if (event) {
    executeDispatchesInOrder(event);

    if (!event.isPersistent()) {
      event.constructor.release(event);
    }
  }
};

var executeDispatchesAndReleaseTopLevel = function (e) {
  return executeDispatchesAndRelease(e);
};

function runEventsInBatch(events) {
  if (events !== null) {
    eventQueue = accumulateInto(eventQueue, events);
  } // Set `eventQueue` to null before processing it so that we can tell if more
  // events get enqueued while processing.


  var processingEventQueue = eventQueue;
  eventQueue = null;

  if (!processingEventQueue) {
    return;
  }

  forEachAccumulated(processingEventQueue, executeDispatchesAndReleaseTopLevel);

  if (!!eventQueue) {
    {
      throw Error("processEventQueue(): Additional events were enqueued while processing an event queue. Support for this has not yet been implemented.");
    }
  } // This would be a good time to rethrow if any of the event handlers threw.


  rethrowCaughtError();
}

function isInteractive(tag) {
  return tag === 'button' || tag === 'input' || tag === 'select' || tag === 'textarea';
}

function shouldPreventMouseEvent(name, type, props) {
  switch (name) {
    case 'onClick':
    case 'onClickCapture':
    case 'onDoubleClick':
    case 'onDoubleClickCapture':
    case 'onMouseDown':
    case 'onMouseDownCapture':
    case 'onMouseMove':
    case 'onMouseMoveCapture':
    case 'onMouseUp':
    case 'onMouseUpCapture':
      return !!(props.disabled && isInteractive(type));

    default:
      return false;
  }
}
/**
 * This is a unified interface for event plugins to be installed and configured.
 *
 * Event plugins can implement the following properties:
 *
 *   `extractEvents` {function(string, DOMEventTarget, string, object): *}
 *     Required. When a top-level event is fired, this method is expected to
 *     extract synthetic events that will in turn be queued and dispatched.
 *
 *   `eventTypes` {object}
 *     Optional, plugins that fire events must publish a mapping of registration
 *     names that are used to register listeners. Values of this mapping must
 *     be objects that contain `registrationName` or `phasedRegistrationNames`.
 *
 *   `executeDispatch` {function(object, function, string)}
 *     Optional, allows plugins to override how an event gets dispatched. By
 *     default, the listener is simply invoked.
 *
 * Each plugin that is injected into `EventsPluginHub` is immediately operable.
 *
 * @public
 */

/**
 * Methods for injecting dependencies.
 */


var injection = {
  /**
   * @param {array} InjectedEventPluginOrder
   * @public
   */
  injectEventPluginOrder: injectEventPluginOrder,

  /**
   * @param {object} injectedNamesToPlugins Map from names to plugin modules.
   */
  injectEventPluginsByName: injectEventPluginsByName
};
/**
 * @param {object} inst The instance, which is the source of events.
 * @param {string} registrationName Name of listener (e.g. `onClick`).
 * @return {?function} The stored callback.
 */

function getListener(inst, registrationName) {
  var listener; // TODO: shouldPreventMouseEvent is DOM-specific and definitely should not
  // live here; needs to be moved to a better place soon

  var stateNode = inst.stateNode;

  if (!stateNode) {
    // Work in progress (ex: onload events in incremental mode).
    return null;
  }

  var props = getFiberCurrentPropsFromNode(stateNode);

  if (!props) {
    // Work in progress.
    return null;
  }

  listener = props[registrationName];

  if (shouldPreventMouseEvent(registrationName, inst.type, props)) {
    return null;
  }

  if (!(!listener || typeof listener === 'function')) {
    {
      throw Error("Expected `" + registrationName + "` listener to be a function, instead got a value of `" + typeof listener + "` type.");
    }
  }

  return listener;
}
/**
 * Allows registered plugins an opportunity to extract events from top-level
 * native browser events.
 *
 * @return {*} An accumulation of synthetic events.
 * @internal
 */

function extractPluginEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags) {
  var events = null;

  for (var i = 0; i < plugins.length; i++) {
    // Not every plugin in the ordering may be loaded at runtime.
    var possiblePlugin = plugins[i];

    if (possiblePlugin) {
      var extractedEvents = possiblePlugin.extractEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags);

      if (extractedEvents) {
        events = accumulateInto(events, extractedEvents);
      }
    }
  }

  return events;
}

function runExtractedPluginEventsInBatch(topLevelType, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags) {
  var events = extractPluginEvents(topLevelType, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags);
  runEventsInBatch(events);
}

var FunctionComponent = 0;
var ClassComponent = 1;
var IndeterminateComponent = 2; // Before we know whether it is function or class

var HostRoot = 3; // Root of a host tree. Could be nested inside another node.

var HostPortal = 4; // A subtree. Could be an entry point to a different renderer.

var HostComponent = 5;
var HostText = 6;
var Fragment = 7;
var Mode = 8;
var ContextConsumer = 9;
var ContextProvider = 10;
var ForwardRef = 11;
var Profiler = 12;
var SuspenseComponent = 13;
var MemoComponent = 14;
var SimpleMemoComponent = 15;
var LazyComponent = 16;
var IncompleteClassComponent = 17;
var DehydratedFragment = 18;
var SuspenseListComponent = 19;
var FundamentalComponent = 20;
var ScopeComponent = 21;

var ReactSharedInternals = React.__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED; // Prevent newer renderers from RTE when used with older react package versions.
// Current owner and dispatcher used to share the same ref,
// but PR #14548 split them out to better support the react-debug-tools package.

if (!ReactSharedInternals.hasOwnProperty('ReactCurrentDispatcher')) {
  ReactSharedInternals.ReactCurrentDispatcher = {
    current: null
  };
}

if (!ReactSharedInternals.hasOwnProperty('ReactCurrentBatchConfig')) {
  ReactSharedInternals.ReactCurrentBatchConfig = {
    suspense: null
  };
}

var BEFORE_SLASH_RE = /^(.*)[\\\/]/;
var describeComponentFrame = function (name, source, ownerName) {
  var sourceInfo = '';

  if (source) {
    var path = source.fileName;
    var fileName = path.replace(BEFORE_SLASH_RE, '');

    {
      // In DEV, include code for a common special case:
      // prefer "folder/index.js" instead of just "index.js".
      if (/^index\./.test(fileName)) {
        var match = path.match(BEFORE_SLASH_RE);

        if (match) {
          var pathBeforeSlash = match[1];

          if (pathBeforeSlash) {
            var folderName = pathBeforeSlash.replace(BEFORE_SLASH_RE, '');
            fileName = folderName + '/' + fileName;
          }
        }
      }
    }

    sourceInfo = ' (at ' + fileName + ':' + source.lineNumber + ')';
  } else if (ownerName) {
    sourceInfo = ' (created by ' + ownerName + ')';
  }

  return '\n    in ' + (name || 'Unknown') + sourceInfo;
};

// The Symbol used to tag the ReactElement-like types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var hasSymbol = typeof Symbol === 'function' && Symbol.for;
var REACT_ELEMENT_TYPE = hasSymbol ? Symbol.for('react.element') : 0xeac7;
var REACT_PORTAL_TYPE = hasSymbol ? Symbol.for('react.portal') : 0xeaca;
var REACT_FRAGMENT_TYPE = hasSymbol ? Symbol.for('react.fragment') : 0xeacb;
var REACT_STRICT_MODE_TYPE = hasSymbol ? Symbol.for('react.strict_mode') : 0xeacc;
var REACT_PROFILER_TYPE = hasSymbol ? Symbol.for('react.profiler') : 0xead2;
var REACT_PROVIDER_TYPE = hasSymbol ? Symbol.for('react.provider') : 0xeacd;
var REACT_CONTEXT_TYPE = hasSymbol ? Symbol.for('react.context') : 0xeace; // TODO: We don't use AsyncMode or ConcurrentMode anymore. They were temporary
// (unstable) APIs that have been removed. Can we remove the symbols?


var REACT_CONCURRENT_MODE_TYPE = hasSymbol ? Symbol.for('react.concurrent_mode') : 0xeacf;
var REACT_FORWARD_REF_TYPE = hasSymbol ? Symbol.for('react.forward_ref') : 0xead0;
var REACT_SUSPENSE_TYPE = hasSymbol ? Symbol.for('react.suspense') : 0xead1;
var REACT_SUSPENSE_LIST_TYPE = hasSymbol ? Symbol.for('react.suspense_list') : 0xead8;
var REACT_MEMO_TYPE = hasSymbol ? Symbol.for('react.memo') : 0xead3;
var REACT_LAZY_TYPE = hasSymbol ? Symbol.for('react.lazy') : 0xead4;
var REACT_FUNDAMENTAL_TYPE = hasSymbol ? Symbol.for('react.fundamental') : 0xead5;
var REACT_RESPONDER_TYPE = hasSymbol ? Symbol.for('react.responder') : 0xead6;
var REACT_SCOPE_TYPE = hasSymbol ? Symbol.for('react.scope') : 0xead7;
var MAYBE_ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;
var FAUX_ITERATOR_SYMBOL = '@@iterator';
function getIteratorFn(maybeIterable) {
  if (maybeIterable === null || typeof maybeIterable !== 'object') {
    return null;
  }

  var maybeIterator = MAYBE_ITERATOR_SYMBOL && maybeIterable[MAYBE_ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL];

  if (typeof maybeIterator === 'function') {
    return maybeIterator;
  }

  return null;
}

/**
 * Similar to invariant but only logs a warning if the condition is not met.
 * This can be used to log issues in development environments in critical
 * paths. Removing the logging code for production environments will keep the
 * same logic and follow the same code paths.
 */

var warning = warningWithoutStack$1;

{
  warning = function (condition, format) {
    if (condition) {
      return;
    }

    var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;
    var stack = ReactDebugCurrentFrame.getStackAddendum(); // eslint-disable-next-line react-internal/warning-and-invariant-args

    for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
      args[_key - 2] = arguments[_key];
    }

    warningWithoutStack$1.apply(void 0, [false, format + '%s'].concat(args, [stack]));
  };
}

var warning$1 = warning;

var Uninitialized = -1;
var Pending = 0;
var Resolved = 1;
var Rejected = 2;
function refineResolvedLazyComponent(lazyComponent) {
  return lazyComponent._status === Resolved ? lazyComponent._result : null;
}
function initializeLazyComponentType(lazyComponent) {
  if (lazyComponent._status === Uninitialized) {
    lazyComponent._status = Pending;
    var ctor = lazyComponent._ctor;
    var thenable = ctor();
    lazyComponent._result = thenable;
    thenable.then(function (moduleObject) {
      if (lazyComponent._status === Pending) {
        var defaultExport = moduleObject.default;

        {
          if (defaultExport === undefined) {
            warning$1(false, 'lazy: Expected the result of a dynamic import() call. ' + 'Instead received: %s\n\nYour code should look like: \n  ' + "const MyComponent = lazy(() => import('./MyComponent'))", moduleObject);
          }
        }

        lazyComponent._status = Resolved;
        lazyComponent._result = defaultExport;
      }
    }, function (error) {
      if (lazyComponent._status === Pending) {
        lazyComponent._status = Rejected;
        lazyComponent._result = error;
      }
    });
  }
}

function getWrappedName(outerType, innerType, wrapperName) {
  var functionName = innerType.displayName || innerType.name || '';
  return outerType.displayName || (functionName !== '' ? wrapperName + "(" + functionName + ")" : wrapperName);
}

function getComponentName(type) {
  if (type == null) {
    // Host root, text node or just invalid type.
    return null;
  }

  {
    if (typeof type.tag === 'number') {
      warningWithoutStack$1(false, 'Received an unexpected object in getComponentName(). ' + 'This is likely a bug in React. Please file an issue.');
    }
  }

  if (typeof type === 'function') {
    return type.displayName || type.name || null;
  }

  if (typeof type === 'string') {
    return type;
  }

  switch (type) {
    case REACT_FRAGMENT_TYPE:
      return 'Fragment';

    case REACT_PORTAL_TYPE:
      return 'Portal';

    case REACT_PROFILER_TYPE:
      return "Profiler";

    case REACT_STRICT_MODE_TYPE:
      return 'StrictMode';

    case REACT_SUSPENSE_TYPE:
      return 'Suspense';

    case REACT_SUSPENSE_LIST_TYPE:
      return 'SuspenseList';
  }

  if (typeof type === 'object') {
    switch (type.$$typeof) {
      case REACT_CONTEXT_TYPE:
        return 'Context.Consumer';

      case REACT_PROVIDER_TYPE:
        return 'Context.Provider';

      case REACT_FORWARD_REF_TYPE:
        return getWrappedName(type, type.render, 'ForwardRef');

      case REACT_MEMO_TYPE:
        return getComponentName(type.type);

      case REACT_LAZY_TYPE:
        {
          var thenable = type;
          var resolvedThenable = refineResolvedLazyComponent(thenable);

          if (resolvedThenable) {
            return getComponentName(resolvedThenable);
          }

          break;
        }
    }
  }

  return null;
}

var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;

function describeFiber(fiber) {
  switch (fiber.tag) {
    case HostRoot:
    case HostPortal:
    case HostText:
    case Fragment:
    case ContextProvider:
    case ContextConsumer:
      return '';

    default:
      var owner = fiber._debugOwner;
      var source = fiber._debugSource;
      var name = getComponentName(fiber.type);
      var ownerName = null;

      if (owner) {
        ownerName = getComponentName(owner.type);
      }

      return describeComponentFrame(name, source, ownerName);
  }
}

function getStackByFiberInDevAndProd(workInProgress) {
  var info = '';
  var node = workInProgress;

  do {
    info += describeFiber(node);
    node = node.return;
  } while (node);

  return info;
}
var current = null;
var phase = null;
function getCurrentFiberOwnerNameInDevOrNull() {
  {
    if (current === null) {
      return null;
    }

    var owner = current._debugOwner;

    if (owner !== null && typeof owner !== 'undefined') {
      return getComponentName(owner.type);
    }
  }

  return null;
}
function getCurrentFiberStackInDev() {
  {
    if (current === null) {
      return '';
    } // Safe because if current fiber exists, we are reconciling,
    // and it is guaranteed to be the work-in-progress version.


    return getStackByFiberInDevAndProd(current);
  }

  return '';
}
function resetCurrentFiber() {
  {
    ReactDebugCurrentFrame.getCurrentStack = null;
    current = null;
    phase = null;
  }
}
function setCurrentFiber(fiber) {
  {
    ReactDebugCurrentFrame.getCurrentStack = getCurrentFiberStackInDev;
    current = fiber;
    phase = null;
  }
}
function setCurrentPhase(lifeCyclePhase) {
  {
    phase = lifeCyclePhase;
  }
}

var canUseDOM = !!(typeof window !== 'undefined' && typeof window.document !== 'undefined' && typeof window.document.createElement !== 'undefined');

function endsWith(subject, search) {
  var length = subject.length;
  return subject.substring(length - search.length, length) === search;
}

var PLUGIN_EVENT_SYSTEM = 1;
var RESPONDER_EVENT_SYSTEM = 1 << 1;
var IS_PASSIVE = 1 << 2;
var IS_ACTIVE = 1 << 3;
var PASSIVE_NOT_SUPPORTED = 1 << 4;
var IS_REPLAYED = 1 << 5;

var restoreImpl = null;
var restoreTarget = null;
var restoreQueue = null;

function restoreStateOfTarget(target) {
  // We perform this translation at the end of the event loop so that we
  // always receive the correct fiber here
  var internalInstance = getInstanceFromNode(target);

  if (!internalInstance) {
    // Unmounted
    return;
  }

  if (!(typeof restoreImpl === 'function')) {
    {
      throw Error("setRestoreImplementation() needs to be called to handle a target for controlled events. This error is likely caused by a bug in React. Please file an issue.");
    }
  }

  var props = getFiberCurrentPropsFromNode(internalInstance.stateNode);
  restoreImpl(internalInstance.stateNode, internalInstance.type, props);
}

function setRestoreImplementation(impl) {
  restoreImpl = impl;
}
function enqueueStateRestore(target) {
  if (restoreTarget) {
    if (restoreQueue) {
      restoreQueue.push(target);
    } else {
      restoreQueue = [target];
    }
  } else {
    restoreTarget = target;
  }
}
function needsStateRestore() {
  return restoreTarget !== null || restoreQueue !== null;
}
function restoreStateIfNeeded() {
  if (!restoreTarget) {
    return;
  }

  var target = restoreTarget;
  var queuedTargets = restoreQueue;
  restoreTarget = null;
  restoreQueue = null;
  restoreStateOfTarget(target);

  if (queuedTargets) {
    for (var i = 0; i < queuedTargets.length; i++) {
      restoreStateOfTarget(queuedTargets[i]);
    }
  }
}

var enableUserTimingAPI = true; // Helps identify side effects in begin-phase lifecycle hooks and setState reducers:

var debugRenderPhaseSideEffects = false; // In some cases, StrictMode should also double-render lifecycles.
// This can be confusing for tests though,
// And it can be bad for performance in production.
// This feature flag can be used to control the behavior:

var debugRenderPhaseSideEffectsForStrictMode = true; // To preserve the "Pause on caught exceptions" behavior of the debugger, we
// replay the begin phase of a failed component inside invokeGuardedCallback.

var replayFailedUnitOfWorkWithInvokeGuardedCallback = true; // Warn about deprecated, async-unsafe lifecycles; relates to RFC #6:

var warnAboutDeprecatedLifecycles = true; // Gather advanced timing metrics for Profiler subtrees.

var enableProfilerTimer = true; // Trace which interactions trigger each commit.

var enableSchedulerTracing = true; // SSR experiments

var enableSuspenseServerRenderer = false;
var enableSelectiveHydration = false; // Only used in www builds.

 // Only used in www builds.

 // Disable javascript: URL strings in href for XSS protection.

var disableJavaScriptURLs = false; // React Fire: prevent the value and checked attributes from syncing
// with their related DOM properties

var disableInputAttributeSyncing = false; // These APIs will no longer be "unstable" in the upcoming 16.7 release,
// Control this behavior with a flag to support 16.6 minor releases in the meanwhile.

var exposeConcurrentModeAPIs = false;
var warnAboutShorthandPropertyCollision = false; // Experimental React Flare event system and event components support.

var enableFlareAPI = false; // Experimental Host Component support.

var enableFundamentalAPI = false; // Experimental Scope support.

var enableScopeAPI = false; // New API for JSX transforms to target - https://github.com/reactjs/rfcs/pull/107

 // We will enforce mocking scheduler with scheduler/unstable_mock at some point. (v17?)
// Till then, we warn about the missing mock, but still fallback to a sync mode compatible version

var warnAboutUnmockedScheduler = false; // For tests, we flush suspense fallbacks in an act scope;
// *except* in some of our own tests, where we test incremental loading states.

var flushSuspenseFallbacksInTests = true; // Add a callback property to suspense to notify which promises are currently
// in the update queue. This allows reporting and tracing of what is causing
// the user to see a loading state.
// Also allows hydration callbacks to fire when a dehydrated boundary gets
// hydrated or deleted.

var enableSuspenseCallback = false; // Part of the simplification of React.createElement so we can eventually move
// from React.createElement to React.jsx
// https://github.com/reactjs/rfcs/blob/createlement-rfc/text/0000-create-element-changes.md

var warnAboutDefaultPropsOnFunctionComponents = false;
var warnAboutStringRefs = false;
var disableLegacyContext = false;
var disableSchedulerTimeoutBasedOnReactExpirationTime = false;
var enableTrustedTypesIntegration = false;

// the renderer. Such as when we're dispatching events or if third party
// libraries need to call batchedUpdates. Eventually, this API will go away when
// everything is batched by default. We'll then have a similar API to opt-out of
// scheduled work and instead do synchronous work.
// Defaults

var batchedUpdatesImpl = function (fn, bookkeeping) {
  return fn(bookkeeping);
};

var discreteUpdatesImpl = function (fn, a, b, c) {
  return fn(a, b, c);
};

var flushDiscreteUpdatesImpl = function () {};

var batchedEventUpdatesImpl = batchedUpdatesImpl;
var isInsideEventHandler = false;
var isBatchingEventUpdates = false;

function finishEventHandler() {
  // Here we wait until all updates have propagated, which is important
  // when using controlled components within layers:
  // https://github.com/facebook/react/issues/1698
  // Then we restore state of any controlled component.
  var controlledComponentsHavePendingUpdates = needsStateRestore();

  if (controlledComponentsHavePendingUpdates) {
    // If a controlled event was fired, we may need to restore the state of
    // the DOM node back to the controlled value. This is necessary when React
    // bails out of the update without touching the DOM.
    flushDiscreteUpdatesImpl();
    restoreStateIfNeeded();
  }
}

function batchedUpdates(fn, bookkeeping) {
  if (isInsideEventHandler) {
    // If we are currently inside another batch, we need to wait until it
    // fully completes before restoring state.
    return fn(bookkeeping);
  }

  isInsideEventHandler = true;

  try {
    return batchedUpdatesImpl(fn, bookkeeping);
  } finally {
    isInsideEventHandler = false;
    finishEventHandler();
  }
}
function batchedEventUpdates(fn, a, b) {
  if (isBatchingEventUpdates) {
    // If we are currently inside another batch, we need to wait until it
    // fully completes before restoring state.
    return fn(a, b);
  }

  isBatchingEventUpdates = true;

  try {
    return batchedEventUpdatesImpl(fn, a, b);
  } finally {
    isBatchingEventUpdates = false;
    finishEventHandler();
  }
} // This is for the React Flare event system

function executeUserEventHandler(fn, value) {
  var previouslyInEventHandler = isInsideEventHandler;

  try {
    isInsideEventHandler = true;
    var type = typeof value === 'object' && value !== null ? value.type : '';
    invokeGuardedCallbackAndCatchFirstError(type, fn, undefined, value);
  } finally {
    isInsideEventHandler = previouslyInEventHandler;
  }
}
function discreteUpdates(fn, a, b, c) {
  var prevIsInsideEventHandler = isInsideEventHandler;
  isInsideEventHandler = true;

  try {
    return discreteUpdatesImpl(fn, a, b, c);
  } finally {
    isInsideEventHandler = prevIsInsideEventHandler;

    if (!isInsideEventHandler) {
      finishEventHandler();
    }
  }
}
var lastFlushedEventTimeStamp = 0;
function flushDiscreteUpdatesIfNeeded(timeStamp) {
  // event.timeStamp isn't overly reliable due to inconsistencies in
  // how different browsers have historically provided the time stamp.
  // Some browsers provide high-resolution time stamps for all events,
  // some provide low-resolution time stamps for all events. FF < 52
  // even mixes both time stamps together. Some browsers even report
  // negative time stamps or time stamps that are 0 (iOS9) in some cases.
  // Given we are only comparing two time stamps with equality (!==),
  // we are safe from the resolution differences. If the time stamp is 0
  // we bail-out of preventing the flush, which can affect semantics,
  // such as if an earlier flush removes or adds event listeners that
  // are fired in the subsequent flush. However, this is the same
  // behaviour as we had before this change, so the risks are low.
  if (!isInsideEventHandler && (!enableFlareAPI || timeStamp === 0 || lastFlushedEventTimeStamp !== timeStamp)) {
    lastFlushedEventTimeStamp = timeStamp;
    flushDiscreteUpdatesImpl();
  }
}
function setBatchingImplementation(_batchedUpdatesImpl, _discreteUpdatesImpl, _flushDiscreteUpdatesImpl, _batchedEventUpdatesImpl) {
  batchedUpdatesImpl = _batchedUpdatesImpl;
  discreteUpdatesImpl = _discreteUpdatesImpl;
  flushDiscreteUpdatesImpl = _flushDiscreteUpdatesImpl;
  batchedEventUpdatesImpl = _batchedEventUpdatesImpl;
}

var DiscreteEvent = 0;
var UserBlockingEvent = 1;
var ContinuousEvent = 2;

// CommonJS interop named imports.

var UserBlockingPriority = Scheduler.unstable_UserBlockingPriority;
var runWithPriority = Scheduler.unstable_runWithPriority;
var listenToResponderEventTypesImpl;
function setListenToResponderEventTypes(_listenToResponderEventTypesImpl) {
  listenToResponderEventTypesImpl = _listenToResponderEventTypesImpl;
}
var rootEventTypesToEventResponderInstances = new Map();
var DoNotPropagateToNextResponder = 0;
var PropagateToNextResponder = 1;
var currentTimeStamp = 0;
var currentInstance = null;
var currentDocument = null;
var currentPropagationBehavior = DoNotPropagateToNextResponder;
var eventResponderContext = {
  dispatchEvent: function (eventValue, eventListener, eventPriority) {
    validateResponderContext();
    validateEventValue(eventValue);

    switch (eventPriority) {
      case DiscreteEvent:
        {
          flushDiscreteUpdatesIfNeeded(currentTimeStamp);
          discreteUpdates(function () {
            return executeUserEventHandler(eventListener, eventValue);
          });
          break;
        }

      case UserBlockingEvent:
        {
          runWithPriority(UserBlockingPriority, function () {
            return executeUserEventHandler(eventListener, eventValue);
          });
          break;
        }

      case ContinuousEvent:
        {
          executeUserEventHandler(eventListener, eventValue);
          break;
        }
    }
  },
  isTargetWithinResponder: function (target) {
    validateResponderContext();

    if (target != null) {
      var fiber = getClosestInstanceFromNode(target);
      var responderFiber = currentInstance.fiber;

      while (fiber !== null) {
        if (fiber === responderFiber || fiber.alternate === responderFiber) {
          return true;
        }

        fiber = fiber.return;
      }
    }

    return false;
  },
  isTargetWithinResponderScope: function (target) {
    validateResponderContext();
    var componentInstance = currentInstance;
    var responder = componentInstance.responder;

    if (target != null) {
      var fiber = getClosestInstanceFromNode(target);
      var responderFiber = currentInstance.fiber;

      while (fiber !== null) {
        if (fiber === responderFiber || fiber.alternate === responderFiber) {
          return true;
        }

        if (doesFiberHaveResponder(fiber, responder)) {
          return false;
        }

        fiber = fiber.return;
      }
    }

    return false;
  },
  isTargetWithinNode: function (childTarget, parentTarget) {
    validateResponderContext();
    var childFiber = getClosestInstanceFromNode(childTarget);
    var parentFiber = getClosestInstanceFromNode(parentTarget);

    if (childFiber != null && parentFiber != null) {
      var parentAlternateFiber = parentFiber.alternate;
      var node = childFiber;

      while (node !== null) {
        if (node === parentFiber || node === parentAlternateFiber) {
          return true;
        }

        node = node.return;
      }

      return false;
    } // Fallback to DOM APIs


    return parentTarget.contains(childTarget);
  },
  addRootEventTypes: function (rootEventTypes) {
    validateResponderContext();
    listenToResponderEventTypesImpl(rootEventTypes, currentDocument);

    for (var i = 0; i < rootEventTypes.length; i++) {
      var rootEventType = rootEventTypes[i];
      var eventResponderInstance = currentInstance;
      registerRootEventType(rootEventType, eventResponderInstance);
    }
  },
  removeRootEventTypes: function (rootEventTypes) {
    validateResponderContext();

    for (var i = 0; i < rootEventTypes.length; i++) {
      var rootEventType = rootEventTypes[i];
      var rootEventResponders = rootEventTypesToEventResponderInstances.get(rootEventType);
      var rootEventTypesSet = currentInstance.rootEventTypes;

      if (rootEventTypesSet !== null) {
        rootEventTypesSet.delete(rootEventType);
      }

      if (rootEventResponders !== undefined) {
        rootEventResponders.delete(currentInstance);
      }
    }
  },
  getActiveDocument: getActiveDocument,
  objectAssign: _assign,
  getTimeStamp: function () {
    validateResponderContext();
    return currentTimeStamp;
  },
  isTargetWithinHostComponent: function (target, elementType) {
    validateResponderContext();
    var fiber = getClosestInstanceFromNode(target);

    while (fiber !== null) {
      if (fiber.tag === HostComponent && fiber.type === elementType) {
        return true;
      }

      fiber = fiber.return;
    }

    return false;
  },
  continuePropagation: function () {
    currentPropagationBehavior = PropagateToNextResponder;
  },
  enqueueStateRestore: enqueueStateRestore,
  getResponderNode: function () {
    validateResponderContext();
    var responderFiber = currentInstance.fiber;

    if (responderFiber.tag === ScopeComponent) {
      return null;
    }

    return responderFiber.stateNode;
  }
};

function validateEventValue(eventValue) {
  if (typeof eventValue === 'object' && eventValue !== null) {
    var target = eventValue.target,
        type = eventValue.type,
        timeStamp = eventValue.timeStamp;

    if (target == null || type == null || timeStamp == null) {
      throw new Error('context.dispatchEvent: "target", "timeStamp", and "type" fields on event object are required.');
    }

    var showWarning = function (name) {
      {
        warning$1(false, '%s is not available on event objects created from event responder modules (React Flare). ' + 'Try wrapping in a conditional, i.e. `if (event.type !== "press") { event.%s }`', name, name);
      }
    };

    eventValue.isDefaultPrevented = function () {
      {
        showWarning('isDefaultPrevented()');
      }
    };

    eventValue.isPropagationStopped = function () {
      {
        showWarning('isPropagationStopped()');
      }
    }; // $FlowFixMe: we don't need value, Flow thinks we do


    Object.defineProperty(eventValue, 'nativeEvent', {
      get: function () {
        {
          showWarning('nativeEvent');
        }
      }
    });
  }
}

function doesFiberHaveResponder(fiber, responder) {
  var tag = fiber.tag;

  if (tag === HostComponent || tag === ScopeComponent) {
    var dependencies = fiber.dependencies;

    if (dependencies !== null) {
      var respondersMap = dependencies.responders;

      if (respondersMap !== null && respondersMap.has(responder)) {
        return true;
      }
    }
  }

  return false;
}

function getActiveDocument() {
  return currentDocument;
}

function createDOMResponderEvent(topLevelType, nativeEvent, nativeEventTarget, passive, passiveSupported) {
  var _ref = nativeEvent,
      buttons = _ref.buttons,
      pointerType = _ref.pointerType;
  var eventPointerType = '';

  if (pointerType !== undefined) {
    eventPointerType = pointerType;
  } else if (nativeEvent.key !== undefined) {
    eventPointerType = 'keyboard';
  } else if (buttons !== undefined) {
    eventPointerType = 'mouse';
  } else if (nativeEvent.changedTouches !== undefined) {
    eventPointerType = 'touch';
  }

  return {
    nativeEvent: nativeEvent,
    passive: passive,
    passiveSupported: passiveSupported,
    pointerType: eventPointerType,
    target: nativeEventTarget,
    type: topLevelType
  };
}

function responderEventTypesContainType(eventTypes, type) {
  for (var i = 0, len = eventTypes.length; i < len; i++) {
    if (eventTypes[i] === type) {
      return true;
    }
  }

  return false;
}

function validateResponderTargetEventTypes(eventType, responder) {
  var targetEventTypes = responder.targetEventTypes; // Validate the target event type exists on the responder

  if (targetEventTypes !== null) {
    return responderEventTypesContainType(targetEventTypes, eventType);
  }

  return false;
}

function traverseAndHandleEventResponderInstances(topLevelType, targetFiber, nativeEvent, nativeEventTarget, eventSystemFlags) {
  var isPassiveEvent = (eventSystemFlags & IS_PASSIVE) !== 0;
  var isPassiveSupported = (eventSystemFlags & PASSIVE_NOT_SUPPORTED) === 0;
  var isPassive = isPassiveEvent || !isPassiveSupported;
  var eventType = isPassive ? topLevelType : topLevelType + '_active'; // Trigger event responders in this order:
  // - Bubble target responder phase
  // - Root responder phase

  var visitedResponders = new Set();
  var responderEvent = createDOMResponderEvent(topLevelType, nativeEvent, nativeEventTarget, isPassiveEvent, isPassiveSupported);
  var node = targetFiber;
  var insidePortal = false;

  while (node !== null) {
    var _node = node,
        dependencies = _node.dependencies,
        tag = _node.tag;

    if (tag === HostPortal) {
      insidePortal = true;
    } else if ((tag === HostComponent || tag === ScopeComponent) && dependencies !== null) {
      var respondersMap = dependencies.responders;

      if (respondersMap !== null) {
        var responderInstances = Array.from(respondersMap.values());

        for (var i = 0, length = responderInstances.length; i < length; i++) {
          var responderInstance = responderInstances[i];
          var props = responderInstance.props,
              responder = responderInstance.responder,
              state = responderInstance.state;

          if (!visitedResponders.has(responder) && validateResponderTargetEventTypes(eventType, responder) && (!insidePortal || responder.targetPortalPropagation)) {
            visitedResponders.add(responder);
            var onEvent = responder.onEvent;

            if (onEvent !== null) {
              currentInstance = responderInstance;
              onEvent(responderEvent, eventResponderContext, props, state);

              if (currentPropagationBehavior === PropagateToNextResponder) {
                visitedResponders.delete(responder);
                currentPropagationBehavior = DoNotPropagateToNextResponder;
              }
            }
          }
        }
      }
    }

    node = node.return;
  } // Root phase


  var rootEventResponderInstances = rootEventTypesToEventResponderInstances.get(eventType);

  if (rootEventResponderInstances !== undefined) {
    var _responderInstances = Array.from(rootEventResponderInstances);

    for (var _i = 0; _i < _responderInstances.length; _i++) {
      var _responderInstance = _responderInstances[_i];
      var props = _responderInstance.props,
          responder = _responderInstance.responder,
          state = _responderInstance.state;
      var onRootEvent = responder.onRootEvent;

      if (onRootEvent !== null) {
        currentInstance = _responderInstance;
        onRootEvent(responderEvent, eventResponderContext, props, state);
      }
    }
  }
}

function mountEventResponder(responder, responderInstance, props, state) {
  var onMount = responder.onMount;

  if (onMount !== null) {
    var previousInstance = currentInstance;
    currentInstance = responderInstance;

    try {
      batchedEventUpdates(function () {
        onMount(eventResponderContext, props, state);
      });
    } finally {
      currentInstance = previousInstance;
    }
  }
}
function unmountEventResponder(responderInstance) {
  var responder = responderInstance.responder;
  var onUnmount = responder.onUnmount;

  if (onUnmount !== null) {
    var props = responderInstance.props,
        state = responderInstance.state;
    var previousInstance = currentInstance;
    currentInstance = responderInstance;

    try {
      batchedEventUpdates(function () {
        onUnmount(eventResponderContext, props, state);
      });
    } finally {
      currentInstance = previousInstance;
    }
  }

  var rootEventTypesSet = responderInstance.rootEventTypes;

  if (rootEventTypesSet !== null) {
    var rootEventTypes = Array.from(rootEventTypesSet);

    for (var i = 0; i < rootEventTypes.length; i++) {
      var topLevelEventType = rootEventTypes[i];
      var rootEventResponderInstances = rootEventTypesToEventResponderInstances.get(topLevelEventType);

      if (rootEventResponderInstances !== undefined) {
        rootEventResponderInstances.delete(responderInstance);
      }
    }
  }
}

function validateResponderContext() {
  if (!(currentInstance !== null)) {
    {
      throw Error("An event responder context was used outside of an event cycle.");
    }
  }
}

function dispatchEventForResponderEventSystem(topLevelType, targetFiber, nativeEvent, nativeEventTarget, eventSystemFlags) {
  if (enableFlareAPI) {
    var previousInstance = currentInstance;
    var previousTimeStamp = currentTimeStamp;
    var previousDocument = currentDocument;
    var previousPropagationBehavior = currentPropagationBehavior;
    currentPropagationBehavior = DoNotPropagateToNextResponder; // nodeType 9 is DOCUMENT_NODE

    currentDocument = nativeEventTarget.nodeType === 9 ? nativeEventTarget : nativeEventTarget.ownerDocument; // We might want to control timeStamp another way here

    currentTimeStamp = nativeEvent.timeStamp;

    try {
      batchedEventUpdates(function () {
        traverseAndHandleEventResponderInstances(topLevelType, targetFiber, nativeEvent, nativeEventTarget, eventSystemFlags);
      });
    } finally {
      currentInstance = previousInstance;
      currentTimeStamp = previousTimeStamp;
      currentDocument = previousDocument;
      currentPropagationBehavior = previousPropagationBehavior;
    }
  }
}
function addRootEventTypesForResponderInstance(responderInstance, rootEventTypes) {
  for (var i = 0; i < rootEventTypes.length; i++) {
    var rootEventType = rootEventTypes[i];
    registerRootEventType(rootEventType, responderInstance);
  }
}

function registerRootEventType(rootEventType, eventResponderInstance) {
  var rootEventResponderInstances = rootEventTypesToEventResponderInstances.get(rootEventType);

  if (rootEventResponderInstances === undefined) {
    rootEventResponderInstances = new Set();
    rootEventTypesToEventResponderInstances.set(rootEventType, rootEventResponderInstances);
  }

  var rootEventTypesSet = eventResponderInstance.rootEventTypes;

  if (rootEventTypesSet === null) {
    rootEventTypesSet = eventResponderInstance.rootEventTypes = new Set();
  }

  if (!!rootEventTypesSet.has(rootEventType)) {
    {
      throw Error("addRootEventTypes() found a duplicate root event type of \"" + rootEventType + "\". This might be because the event type exists in the event responder \"rootEventTypes\" array or because of a previous addRootEventTypes() using this root event type.");
    }
  }

  rootEventTypesSet.add(rootEventType);
  rootEventResponderInstances.add(eventResponderInstance);
}

// A reserved attribute.
// It is handled by React separately and shouldn't be written to the DOM.
var RESERVED = 0; // A simple string attribute.
// Attributes that aren't in the whitelist are presumed to have this type.

var STRING = 1; // A string attribute that accepts booleans in React. In HTML, these are called
// "enumerated" attributes with "true" and "false" as possible values.
// When true, it should be set to a "true" string.
// When false, it should be set to a "false" string.

var BOOLEANISH_STRING = 2; // A real boolean attribute.
// When true, it should be present (set either to an empty string or its name).
// When false, it should be omitted.

var BOOLEAN = 3; // An attribute that can be used as a flag as well as with a value.
// When true, it should be present (set either to an empty string or its name).
// When false, it should be omitted.
// For any other value, should be present with that value.

var OVERLOADED_BOOLEAN = 4; // An attribute that must be numeric or parse as a numeric.
// When falsy, it should be removed.

var NUMERIC = 5; // An attribute that must be positive numeric or parse as a positive numeric.
// When falsy, it should be removed.

var POSITIVE_NUMERIC = 6;

/* eslint-disable max-len */
var ATTRIBUTE_NAME_START_CHAR = ":A-Z_a-z\\u00C0-\\u00D6\\u00D8-\\u00F6\\u00F8-\\u02FF\\u0370-\\u037D\\u037F-\\u1FFF\\u200C-\\u200D\\u2070-\\u218F\\u2C00-\\u2FEF\\u3001-\\uD7FF\\uF900-\\uFDCF\\uFDF0-\\uFFFD";
/* eslint-enable max-len */

var ATTRIBUTE_NAME_CHAR = ATTRIBUTE_NAME_START_CHAR + "\\-.0-9\\u00B7\\u0300-\\u036F\\u203F-\\u2040";

var ROOT_ATTRIBUTE_NAME = 'data-reactroot';
var VALID_ATTRIBUTE_NAME_REGEX = new RegExp('^[' + ATTRIBUTE_NAME_START_CHAR + '][' + ATTRIBUTE_NAME_CHAR + ']*$');
var hasOwnProperty = Object.prototype.hasOwnProperty;
var illegalAttributeNameCache = {};
var validatedAttributeNameCache = {};
function isAttributeNameSafe(attributeName) {
  if (hasOwnProperty.call(validatedAttributeNameCache, attributeName)) {
    return true;
  }

  if (hasOwnProperty.call(illegalAttributeNameCache, attributeName)) {
    return false;
  }

  if (VALID_ATTRIBUTE_NAME_REGEX.test(attributeName)) {
    validatedAttributeNameCache[attributeName] = true;
    return true;
  }

  illegalAttributeNameCache[attributeName] = true;

  {
    warning$1(false, 'Invalid attribute name: `%s`', attributeName);
  }

  return false;
}
function shouldIgnoreAttribute(name, propertyInfo, isCustomComponentTag) {
  if (propertyInfo !== null) {
    return propertyInfo.type === RESERVED;
  }

  if (isCustomComponentTag) {
    return false;
  }

  if (name.length > 2 && (name[0] === 'o' || name[0] === 'O') && (name[1] === 'n' || name[1] === 'N')) {
    return true;
  }

  return false;
}
function shouldRemoveAttributeWithWarning(name, value, propertyInfo, isCustomComponentTag) {
  if (propertyInfo !== null && propertyInfo.type === RESERVED) {
    return false;
  }

  switch (typeof value) {
    case 'function': // $FlowIssue symbol is perfectly valid here

    case 'symbol':
      // eslint-disable-line
      return true;

    case 'boolean':
      {
        if (isCustomComponentTag) {
          return false;
        }

        if (propertyInfo !== null) {
          return !propertyInfo.acceptsBooleans;
        } else {
          var prefix = name.toLowerCase().slice(0, 5);
          return prefix !== 'data-' && prefix !== 'aria-';
        }
      }

    default:
      return false;
  }
}
function shouldRemoveAttribute(name, value, propertyInfo, isCustomComponentTag) {
  if (value === null || typeof value === 'undefined') {
    return true;
  }

  if (shouldRemoveAttributeWithWarning(name, value, propertyInfo, isCustomComponentTag)) {
    return true;
  }

  if (isCustomComponentTag) {
    return false;
  }

  if (propertyInfo !== null) {
    switch (propertyInfo.type) {
      case BOOLEAN:
        return !value;

      case OVERLOADED_BOOLEAN:
        return value === false;

      case NUMERIC:
        return isNaN(value);

      case POSITIVE_NUMERIC:
        return isNaN(value) || value < 1;
    }
  }

  return false;
}
function getPropertyInfo(name) {
  return properties.hasOwnProperty(name) ? properties[name] : null;
}

function PropertyInfoRecord(name, type, mustUseProperty, attributeName, attributeNamespace, sanitizeURL) {
  this.acceptsBooleans = type === BOOLEANISH_STRING || type === BOOLEAN || type === OVERLOADED_BOOLEAN;
  this.attributeName = attributeName;
  this.attributeNamespace = attributeNamespace;
  this.mustUseProperty = mustUseProperty;
  this.propertyName = name;
  this.type = type;
  this.sanitizeURL = sanitizeURL;
} // When adding attributes to this list, be sure to also add them to
// the `possibleStandardNames` module to ensure casing and incorrect
// name warnings.


var properties = {}; // These props are reserved by React. They shouldn't be written to the DOM.

['children', 'dangerouslySetInnerHTML', // TODO: This prevents the assignment of defaultValue to regular
// elements (not just inputs). Now that ReactDOMInput assigns to the
// defaultValue property -- do we need this?
'defaultValue', 'defaultChecked', 'innerHTML', 'suppressContentEditableWarning', 'suppressHydrationWarning', 'style'].forEach(function (name) {
  properties[name] = new PropertyInfoRecord(name, RESERVED, false, // mustUseProperty
  name, // attributeName
  null, // attributeNamespace
  false);
}); // A few React string attributes have a different name.
// This is a mapping from React prop names to the attribute names.

[['acceptCharset', 'accept-charset'], ['className', 'class'], ['htmlFor', 'for'], ['httpEquiv', 'http-equiv']].forEach(function (_ref) {
  var name = _ref[0],
      attributeName = _ref[1];
  properties[name] = new PropertyInfoRecord(name, STRING, false, // mustUseProperty
  attributeName, // attributeName
  null, // attributeNamespace
  false);
}); // These are "enumerated" HTML attributes that accept "true" and "false".
// In React, we let users pass `true` and `false` even though technically
// these aren't boolean attributes (they are coerced to strings).

['contentEditable', 'draggable', 'spellCheck', 'value'].forEach(function (name) {
  properties[name] = new PropertyInfoRecord(name, BOOLEANISH_STRING, false, // mustUseProperty
  name.toLowerCase(), // attributeName
  null, // attributeNamespace
  false);
}); // These are "enumerated" SVG attributes that accept "true" and "false".
// In React, we let users pass `true` and `false` even though technically
// these aren't boolean attributes (they are coerced to strings).
// Since these are SVG attributes, their attribute names are case-sensitive.

['autoReverse', 'externalResourcesRequired', 'focusable', 'preserveAlpha'].forEach(function (name) {
  properties[name] = new PropertyInfoRecord(name, BOOLEANISH_STRING, false, // mustUseProperty
  name, // attributeName
  null, // attributeNamespace
  false);
}); // These are HTML boolean attributes.

['allowFullScreen', 'async', // Note: there is a special case that prevents it from being written to the DOM
// on the client side because the browsers are inconsistent. Instead we call focus().
'autoFocus', 'autoPlay', 'controls', 'default', 'defer', 'disabled', 'disablePictureInPicture', 'formNoValidate', 'hidden', 'loop', 'noModule', 'noValidate', 'open', 'playsInline', 'readOnly', 'required', 'reversed', 'scoped', 'seamless', // Microdata
'itemScope'].forEach(function (name) {
  properties[name] = new PropertyInfoRecord(name, BOOLEAN, false, // mustUseProperty
  name.toLowerCase(), // attributeName
  null, // attributeNamespace
  false);
}); // These are the few React props that we set as DOM properties
// rather than attributes. These are all booleans.

['checked', // Note: `option.selected` is not updated if `select.multiple` is
// disabled with `removeAttribute`. We have special logic for handling this.
'multiple', 'muted', 'selected'].forEach(function (name) {
  properties[name] = new PropertyInfoRecord(name, BOOLEAN, true, // mustUseProperty
  name, // attributeName
  null, // attributeNamespace
  false);
}); // These are HTML attributes that are "overloaded booleans": they behave like
// booleans, but can also accept a string value.

['capture', 'download'].forEach(function (name) {
  properties[name] = new PropertyInfoRecord(name, OVERLOADED_BOOLEAN, false, // mustUseProperty
  name, // attributeName
  null, // attributeNamespace
  false);
}); // These are HTML attributes that must be positive numbers.

['cols', 'rows', 'size', 'span'].forEach(function (name) {
  properties[name] = new PropertyInfoRecord(name, POSITIVE_NUMERIC, false, // mustUseProperty
  name, // attributeName
  null, // attributeNamespace
  false);
}); // These are HTML attributes that must be numbers.

['rowSpan', 'start'].forEach(function (name) {
  properties[name] = new PropertyInfoRecord(name, NUMERIC, false, // mustUseProperty
  name.toLowerCase(), // attributeName
  null, // attributeNamespace
  false);
});
var CAMELIZE = /[\-\:]([a-z])/g;

var capitalize = function (token) {
  return token[1].toUpperCase();
}; // This is a list of all SVG attributes that need special casing, namespacing,
// or boolean value assignment. Regular attributes that just accept strings
// and have the same names are omitted, just like in the HTML whitelist.
// Some of these attributes can be hard to find. This list was created by
// scrapping the MDN documentation.


['accent-height', 'alignment-baseline', 'arabic-form', 'baseline-shift', 'cap-height', 'clip-path', 'clip-rule', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'dominant-baseline', 'enable-background', 'fill-opacity', 'fill-rule', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'glyph-name', 'glyph-orientation-horizontal', 'glyph-orientation-vertical', 'horiz-adv-x', 'horiz-origin-x', 'image-rendering', 'letter-spacing', 'lighting-color', 'marker-end', 'marker-mid', 'marker-start', 'overline-position', 'overline-thickness', 'paint-order', 'panose-1', 'pointer-events', 'rendering-intent', 'shape-rendering', 'stop-color', 'stop-opacity', 'strikethrough-position', 'strikethrough-thickness', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke-width', 'text-anchor', 'text-decoration', 'text-rendering', 'underline-position', 'underline-thickness', 'unicode-bidi', 'unicode-range', 'units-per-em', 'v-alphabetic', 'v-hanging', 'v-ideographic', 'v-mathematical', 'vector-effect', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'word-spacing', 'writing-mode', 'xmlns:xlink', 'x-height'].forEach(function (attributeName) {
  var name = attributeName.replace(CAMELIZE, capitalize);
  properties[name] = new PropertyInfoRecord(name, STRING, false, // mustUseProperty
  attributeName, null, // attributeNamespace
  false);
}); // String SVG attributes with the xlink namespace.

['xlink:actuate', 'xlink:arcrole', 'xlink:role', 'xlink:show', 'xlink:title', 'xlink:type'].forEach(function (attributeName) {
  var name = attributeName.replace(CAMELIZE, capitalize);
  properties[name] = new PropertyInfoRecord(name, STRING, false, // mustUseProperty
  attributeName, 'http://www.w3.org/1999/xlink', false);
}); // String SVG attributes with the xml namespace.

['xml:base', 'xml:lang', 'xml:space'].forEach(function (attributeName) {
  var name = attributeName.replace(CAMELIZE, capitalize);
  properties[name] = new PropertyInfoRecord(name, STRING, false, // mustUseProperty
  attributeName, 'http://www.w3.org/XML/1998/namespace', false);
}); // These attribute exists both in HTML and SVG.
// The attribute name is case-sensitive in SVG so we can't just use
// the React name like we do for attributes that exist only in HTML.

['tabIndex', 'crossOrigin'].forEach(function (attributeName) {
  properties[attributeName] = new PropertyInfoRecord(attributeName, STRING, false, // mustUseProperty
  attributeName.toLowerCase(), // attributeName
  null, // attributeNamespace
  false);
}); // These attributes accept URLs. These must not allow javascript: URLS.
// These will also need to accept Trusted Types object in the future.

var xlinkHref = 'xlinkHref';
properties[xlinkHref] = new PropertyInfoRecord('xlinkHref', STRING, false, // mustUseProperty
'xlink:href', 'http://www.w3.org/1999/xlink', true);
['src', 'href', 'action', 'formAction'].forEach(function (attributeName) {
  properties[attributeName] = new PropertyInfoRecord(attributeName, STRING, false, // mustUseProperty
  attributeName.toLowerCase(), // attributeName
  null, // attributeNamespace
  true);
});

var ReactDebugCurrentFrame$1 = null;

{
  ReactDebugCurrentFrame$1 = ReactSharedInternals.ReactDebugCurrentFrame;
} // A javascript: URL can contain leading C0 control or \u0020 SPACE,
// and any newline or tab are filtered out as if they're not part of the URL.
// https://url.spec.whatwg.org/#url-parsing
// Tab or newline are defined as \r\n\t:
// https://infra.spec.whatwg.org/#ascii-tab-or-newline
// A C0 control is a code point in the range \u0000 NULL to \u001F
// INFORMATION SEPARATOR ONE, inclusive:
// https://infra.spec.whatwg.org/#c0-control-or-space

/* eslint-disable max-len */


var isJavaScriptProtocol = /^[\u0000-\u001F ]*j[\r\n\t]*a[\r\n\t]*v[\r\n\t]*a[\r\n\t]*s[\r\n\t]*c[\r\n\t]*r[\r\n\t]*i[\r\n\t]*p[\r\n\t]*t[\r\n\t]*\:/i;
var didWarn = false;

function sanitizeURL(url) {
  if (disableJavaScriptURLs) {
    if (!!isJavaScriptProtocol.test(url)) {
      {
        throw Error("React has blocked a javascript: URL as a security precaution." + (ReactDebugCurrentFrame$1.getStackAddendum()));
      }
    }
  } else if (true && !didWarn && isJavaScriptProtocol.test(url)) {
    didWarn = true;
    warning$1(false, 'A future version of React will block javascript: URLs as a security precaution. ' + 'Use event handlers instead if you can. If you need to generate unsafe HTML try ' + 'using dangerouslySetInnerHTML instead. React was passed %s.', JSON.stringify(url));
  }
}

// Flow does not allow string concatenation of most non-string types. To work
// around this limitation, we use an opaque type that can only be obtained by
// passing the value through getToStringValue first.
function toString(value) {
  return '' + value;
}
function getToStringValue(value) {
  switch (typeof value) {
    case 'boolean':
    case 'number':
    case 'object':
    case 'string':
    case 'undefined':
      return value;

    default:
      // function, symbol are assigned as empty strings
      return '';
  }
}
/** Trusted value is a wrapper for "safe" values which can be assigned to DOM execution sinks. */

/**
 * We allow passing objects with toString method as element attributes or in dangerouslySetInnerHTML
 * and we do validations that the value is safe. Once we do validation we want to use the validated
 * value instead of the object (because object.toString may return something else on next call).
 *
 * If application uses Trusted Types we don't stringify trusted values, but preserve them as objects.
 */
var toStringOrTrustedType = toString;

if (enableTrustedTypesIntegration && typeof trustedTypes !== 'undefined') {
  toStringOrTrustedType = function (value) {
    if (typeof value === 'object' && (trustedTypes.isHTML(value) || trustedTypes.isScript(value) || trustedTypes.isScriptURL(value) ||
    /* TrustedURLs are deprecated and will be removed soon: https://github.com/WICG/trusted-types/pull/204 */
    trustedTypes.isURL && trustedTypes.isURL(value))) {
      // Pass Trusted Types through.
      return value;
    }

    return toString(value);
  };
}

/**
 * Set attribute for a node. The attribute value can be either string or
 * Trusted value (if application uses Trusted Types).
 */
function setAttribute(node, attributeName, attributeValue) {
  node.setAttribute(attributeName, attributeValue);
}
/**
 * Set attribute with namespace for a node. The attribute value can be either string or
 * Trusted value (if application uses Trusted Types).
 */

function setAttributeNS(node, attributeNamespace, attributeName, attributeValue) {
  node.setAttributeNS(attributeNamespace, attributeName, attributeValue);
}

/**
 * Get the value for a property on a node. Only used in DEV for SSR validation.
 * The "expected" argument is used as a hint of what the expected value is.
 * Some properties have multiple equivalent values.
 */
function getValueForProperty(node, name, expected, propertyInfo) {
  {
    if (propertyInfo.mustUseProperty) {
      var propertyName = propertyInfo.propertyName;
      return node[propertyName];
    } else {
      if (!disableJavaScriptURLs && propertyInfo.sanitizeURL) {
        // If we haven't fully disabled javascript: URLs, and if
        // the hydration is successful of a javascript: URL, we
        // still want to warn on the client.
        sanitizeURL('' + expected);
      }

      var attributeName = propertyInfo.attributeName;
      var stringValue = null;

      if (propertyInfo.type === OVERLOADED_BOOLEAN) {
        if (node.hasAttribute(attributeName)) {
          var value = node.getAttribute(attributeName);

          if (value === '') {
            return true;
          }

          if (shouldRemoveAttribute(name, expected, propertyInfo, false)) {
            return value;
          }

          if (value === '' + expected) {
            return expected;
          }

          return value;
        }
      } else if (node.hasAttribute(attributeName)) {
        if (shouldRemoveAttribute(name, expected, propertyInfo, false)) {
          // We had an attribute but shouldn't have had one, so read it
          // for the error message.
          return node.getAttribute(attributeName);
        }

        if (propertyInfo.type === BOOLEAN) {
          // If this was a boolean, it doesn't matter what the value is
          // the fact that we have it is the same as the expected.
          return expected;
        } // Even if this property uses a namespace we use getAttribute
        // because we assume its namespaced name is the same as our config.
        // To use getAttributeNS we need the local name which we don't have
        // in our config atm.


        stringValue = node.getAttribute(attributeName);
      }

      if (shouldRemoveAttribute(name, expected, propertyInfo, false)) {
        return stringValue === null ? expected : stringValue;
      } else if (stringValue === '' + expected) {
        return expected;
      } else {
        return stringValue;
      }
    }
  }
}
/**
 * Get the value for a attribute on a node. Only used in DEV for SSR validation.
 * The third argument is used as a hint of what the expected value is. Some
 * attributes have multiple equivalent values.
 */

function getValueForAttribute(node, name, expected) {
  {
    if (!isAttributeNameSafe(name)) {
      return;
    }

    if (!node.hasAttribute(name)) {
      return expected === undefined ? undefined : null;
    }

    var value = node.getAttribute(name);

    if (value === '' + expected) {
      return expected;
    }

    return value;
  }
}
/**
 * Sets the value for a property on a node.
 *
 * @param {DOMElement} node
 * @param {string} name
 * @param {*} value
 */

function setValueForProperty(node, name, value, isCustomComponentTag) {
  var propertyInfo = getPropertyInfo(name);

  if (shouldIgnoreAttribute(name, propertyInfo, isCustomComponentTag)) {
    return;
  }

  if (shouldRemoveAttribute(name, value, propertyInfo, isCustomComponentTag)) {
    value = null;
  } // If the prop isn't in the special list, treat it as a simple attribute.


  if (isCustomComponentTag || propertyInfo === null) {
    if (isAttributeNameSafe(name)) {
      var _attributeName = name;

      if (value === null) {
        node.removeAttribute(_attributeName);
      } else {
        setAttribute(node, _attributeName, toStringOrTrustedType(value));
      }
    }

    return;
  }

  var mustUseProperty = propertyInfo.mustUseProperty;

  if (mustUseProperty) {
    var propertyName = propertyInfo.propertyName;

    if (value === null) {
      var type = propertyInfo.type;
      node[propertyName] = type === BOOLEAN ? false : '';
    } else {
      // Contrary to `setAttribute`, object properties are properly
      // `toString`ed by IE8/9.
      node[propertyName] = value;
    }

    return;
  } // The rest are treated as attributes with special cases.


  var attributeName = propertyInfo.attributeName,
      attributeNamespace = propertyInfo.attributeNamespace;

  if (value === null) {
    node.removeAttribute(attributeName);
  } else {
    var _type = propertyInfo.type;
    var attributeValue;

    if (_type === BOOLEAN || _type === OVERLOADED_BOOLEAN && value === true) {
      // If attribute type is boolean, we know for sure it won't be an execution sink
      // and we won't require Trusted Type here.
      attributeValue = '';
    } else {
      // `setAttribute` with objects becomes only `[object]` in IE8/9,
      // ('' + value) makes it output the correct toString()-value.
      attributeValue = toStringOrTrustedType(value);

      if (propertyInfo.sanitizeURL) {
        sanitizeURL(attributeValue.toString());
      }
    }

    if (attributeNamespace) {
      setAttributeNS(node, attributeNamespace, attributeName, attributeValue);
    } else {
      setAttribute(node, attributeName, attributeValue);
    }
  }
}

var ReactDebugCurrentFrame$2 = null;
var ReactControlledValuePropTypes = {
  checkPropTypes: null
};

{
  ReactDebugCurrentFrame$2 = ReactSharedInternals.ReactDebugCurrentFrame;
  var hasReadOnlyValue = {
    button: true,
    checkbox: true,
    image: true,
    hidden: true,
    radio: true,
    reset: true,
    submit: true
  };
  var propTypes = {
    value: function (props, propName, componentName) {
      if (hasReadOnlyValue[props.type] || props.onChange || props.readOnly || props.disabled || props[propName] == null || enableFlareAPI && props.listeners) {
        return null;
      }

      return new Error('You provided a `value` prop to a form field without an ' + '`onChange` handler. This will render a read-only field. If ' + 'the field should be mutable use `defaultValue`. Otherwise, ' + 'set either `onChange` or `readOnly`.');
    },
    checked: function (props, propName, componentName) {
      if (props.onChange || props.readOnly || props.disabled || props[propName] == null || enableFlareAPI && props.listeners) {
        return null;
      }

      return new Error('You provided a `checked` prop to a form field without an ' + '`onChange` handler. This will render a read-only field. If ' + 'the field should be mutable use `defaultChecked`. Otherwise, ' + 'set either `onChange` or `readOnly`.');
    }
  };
  /**
   * Provide a linked `value` attribute for controlled forms. You should not use
   * this outside of the ReactDOM controlled form components.
   */

  ReactControlledValuePropTypes.checkPropTypes = function (tagName, props) {
    checkPropTypes(propTypes, props, 'prop', tagName, ReactDebugCurrentFrame$2.getStackAddendum);
  };
}

function isCheckable(elem) {
  var type = elem.type;
  var nodeName = elem.nodeName;
  return nodeName && nodeName.toLowerCase() === 'input' && (type === 'checkbox' || type === 'radio');
}

function getTracker(node) {
  return node._valueTracker;
}

function detachTracker(node) {
  node._valueTracker = null;
}

function getValueFromNode(node) {
  var value = '';

  if (!node) {
    return value;
  }

  if (isCheckable(node)) {
    value = node.checked ? 'true' : 'false';
  } else {
    value = node.value;
  }

  return value;
}

function trackValueOnNode(node) {
  var valueField = isCheckable(node) ? 'checked' : 'value';
  var descriptor = Object.getOwnPropertyDescriptor(node.constructor.prototype, valueField);
  var currentValue = '' + node[valueField]; // if someone has already defined a value or Safari, then bail
  // and don't track value will cause over reporting of changes,
  // but it's better then a hard failure
  // (needed for certain tests that spyOn input values and Safari)

  if (node.hasOwnProperty(valueField) || typeof descriptor === 'undefined' || typeof descriptor.get !== 'function' || typeof descriptor.set !== 'function') {
    return;
  }

  var get = descriptor.get,
      set = descriptor.set;
  Object.defineProperty(node, valueField, {
    configurable: true,
    get: function () {
      return get.call(this);
    },
    set: function (value) {
      currentValue = '' + value;
      set.call(this, value);
    }
  }); // We could've passed this the first time
  // but it triggers a bug in IE11 and Edge 14/15.
  // Calling defineProperty() again should be equivalent.
  // https://github.com/facebook/react/issues/11768

  Object.defineProperty(node, valueField, {
    enumerable: descriptor.enumerable
  });
  var tracker = {
    getValue: function () {
      return currentValue;
    },
    setValue: function (value) {
      currentValue = '' + value;
    },
    stopTracking: function () {
      detachTracker(node);
      delete node[valueField];
    }
  };
  return tracker;
}

function track(node) {
  if (getTracker(node)) {
    return;
  } // TODO: Once it's just Fiber we can move this to node._wrapperState


  node._valueTracker = trackValueOnNode(node);
}
function updateValueIfChanged(node) {
  if (!node) {
    return false;
  }

  var tracker = getTracker(node); // if there is no tracker at this point it's unlikely
  // that trying again will succeed

  if (!tracker) {
    return true;
  }

  var lastValue = tracker.getValue();
  var nextValue = getValueFromNode(node);

  if (nextValue !== lastValue) {
    tracker.setValue(nextValue);
    return true;
  }

  return false;
}

// TODO: direct imports like some-package/src/* are bad. Fix me.
var didWarnValueDefaultValue = false;
var didWarnCheckedDefaultChecked = false;
var didWarnControlledToUncontrolled = false;
var didWarnUncontrolledToControlled = false;

function isControlled(props) {
  var usesChecked = props.type === 'checkbox' || props.type === 'radio';
  return usesChecked ? props.checked != null : props.value != null;
}
/**
 * Implements an <input> host component that allows setting these optional
 * props: `checked`, `value`, `defaultChecked`, and `defaultValue`.
 *
 * If `checked` or `value` are not supplied (or null/undefined), user actions
 * that affect the checked state or value will trigger updates to the element.
 *
 * If they are supplied (and not null/undefined), the rendered element will not
 * trigger updates to the element. Instead, the props must change in order for
 * the rendered element to be updated.
 *
 * The rendered element will be initialized as unchecked (or `defaultChecked`)
 * with an empty value (or `defaultValue`).
 *
 * See http://www.w3.org/TR/2012/WD-html5-20121025/the-input-element.html
 */


function getHostProps(element, props) {
  var node = element;
  var checked = props.checked;

  var hostProps = _assign({}, props, {
    defaultChecked: undefined,
    defaultValue: undefined,
    value: undefined,
    checked: checked != null ? checked : node._wrapperState.initialChecked
  });

  return hostProps;
}
function initWrapperState(element, props) {
  {
    ReactControlledValuePropTypes.checkPropTypes('input', props);

    if (props.checked !== undefined && props.defaultChecked !== undefined && !didWarnCheckedDefaultChecked) {
      warning$1(false, '%s contains an input of type %s with both checked and defaultChecked props. ' + 'Input elements must be either controlled or uncontrolled ' + '(specify either the checked prop, or the defaultChecked prop, but not ' + 'both). Decide between using a controlled or uncontrolled input ' + 'element and remove one of these props. More info: ' + 'https://fb.me/react-controlled-components', getCurrentFiberOwnerNameInDevOrNull() || 'A component', props.type);
      didWarnCheckedDefaultChecked = true;
    }

    if (props.value !== undefined && props.defaultValue !== undefined && !didWarnValueDefaultValue) {
      warning$1(false, '%s contains an input of type %s with both value and defaultValue props. ' + 'Input elements must be either controlled or uncontrolled ' + '(specify either the value prop, or the defaultValue prop, but not ' + 'both). Decide between using a controlled or uncontrolled input ' + 'element and remove one of these props. More info: ' + 'https://fb.me/react-controlled-components', getCurrentFiberOwnerNameInDevOrNull() || 'A component', props.type);
      didWarnValueDefaultValue = true;
    }
  }

  var node = element;
  var defaultValue = props.defaultValue == null ? '' : props.defaultValue;
  node._wrapperState = {
    initialChecked: props.checked != null ? props.checked : props.defaultChecked,
    initialValue: getToStringValue(props.value != null ? props.value : defaultValue),
    controlled: isControlled(props)
  };
}
function updateChecked(element, props) {
  var node = element;
  var checked = props.checked;

  if (checked != null) {
    setValueForProperty(node, 'checked', checked, false);
  }
}
function updateWrapper(element, props) {
  var node = element;

  {
    var controlled = isControlled(props);

    if (!node._wrapperState.controlled && controlled && !didWarnUncontrolledToControlled) {
      warning$1(false, 'A component is changing an uncontrolled input of type %s to be controlled. ' + 'Input elements should not switch from uncontrolled to controlled (or vice versa). ' + 'Decide between using a controlled or uncontrolled input ' + 'element for the lifetime of the component. More info: https://fb.me/react-controlled-components', props.type);
      didWarnUncontrolledToControlled = true;
    }

    if (node._wrapperState.controlled && !controlled && !didWarnControlledToUncontrolled) {
      warning$1(false, 'A component is changing a controlled input of type %s to be uncontrolled. ' + 'Input elements should not switch from controlled to uncontrolled (or vice versa). ' + 'Decide between using a controlled or uncontrolled input ' + 'element for the lifetime of the component. More info: https://fb.me/react-controlled-components', props.type);
      didWarnControlledToUncontrolled = true;
    }
  }

  updateChecked(element, props);
  var value = getToStringValue(props.value);
  var type = props.type;

  if (value != null) {
    if (type === 'number') {
      if (value === 0 && node.value === '' || // We explicitly want to coerce to number here if possible.
      // eslint-disable-next-line
      node.value != value) {
        node.value = toString(value);
      }
    } else if (node.value !== toString(value)) {
      node.value = toString(value);
    }
  } else if (type === 'submit' || type === 'reset') {
    // Submit/reset inputs need the attribute removed completely to avoid
    // blank-text buttons.
    node.removeAttribute('value');
    return;
  }

  if (disableInputAttributeSyncing) {
    // When not syncing the value attribute, React only assigns a new value
    // whenever the defaultValue React prop has changed. When not present,
    // React does nothing
    if (props.hasOwnProperty('defaultValue')) {
      setDefaultValue(node, props.type, getToStringValue(props.defaultValue));
    }
  } else {
    // When syncing the value attribute, the value comes from a cascade of
    // properties:
    //  1. The value React property
    //  2. The defaultValue React property
    //  3. Otherwise there should be no change
    if (props.hasOwnProperty('value')) {
      setDefaultValue(node, props.type, value);
    } else if (props.hasOwnProperty('defaultValue')) {
      setDefaultValue(node, props.type, getToStringValue(props.defaultValue));
    }
  }

  if (disableInputAttributeSyncing) {
    // When not syncing the checked attribute, the attribute is directly
    // controllable from the defaultValue React property. It needs to be
    // updated as new props come in.
    if (props.defaultChecked == null) {
      node.removeAttribute('checked');
    } else {
      node.defaultChecked = !!props.defaultChecked;
    }
  } else {
    // When syncing the checked attribute, it only changes when it needs
    // to be removed, such as transitioning from a checkbox into a text input
    if (props.checked == null && props.defaultChecked != null) {
      node.defaultChecked = !!props.defaultChecked;
    }
  }
}
function postMountWrapper(element, props, isHydrating) {
  var node = element; // Do not assign value if it is already set. This prevents user text input
  // from being lost during SSR hydration.

  if (props.hasOwnProperty('value') || props.hasOwnProperty('defaultValue')) {
    var type = props.type;
    var isButton = type === 'submit' || type === 'reset'; // Avoid setting value attribute on submit/reset inputs as it overrides the
    // default value provided by the browser. See: #12872

    if (isButton && (props.value === undefined || props.value === null)) {
      return;
    }

    var initialValue = toString(node._wrapperState.initialValue); // Do not assign value if it is already set. This prevents user text input
    // from being lost during SSR hydration.

    if (!isHydrating) {
      if (disableInputAttributeSyncing) {
        var value = getToStringValue(props.value); // When not syncing the value attribute, the value property points
        // directly to the React prop. Only assign it if it exists.

        if (value != null) {
          // Always assign on buttons so that it is possible to assign an
          // empty string to clear button text.
          //
          // Otherwise, do not re-assign the value property if is empty. This
          // potentially avoids a DOM write and prevents Firefox (~60.0.1) from
          // prematurely marking required inputs as invalid. Equality is compared
          // to the current value in case the browser provided value is not an
          // empty string.
          if (isButton || value !== node.value) {
            node.value = toString(value);
          }
        }
      } else {
        // When syncing the value attribute, the value property should use
        // the wrapperState._initialValue property. This uses:
        //
        //   1. The value React property when present
        //   2. The defaultValue React property when present
        //   3. An empty string
        if (initialValue !== node.value) {
          node.value = initialValue;
        }
      }
    }

    if (disableInputAttributeSyncing) {
      // When not syncing the value attribute, assign the value attribute
      // directly from the defaultValue React property (when present)
      var defaultValue = getToStringValue(props.defaultValue);

      if (defaultValue != null) {
        node.defaultValue = toString(defaultValue);
      }
    } else {
      // Otherwise, the value attribute is synchronized to the property,
      // so we assign defaultValue to the same thing as the value property
      // assignment step above.
      node.defaultValue = initialValue;
    }
  } // Normally, we'd just do `node.checked = node.checked` upon initial mount, less this bug
  // this is needed to work around a chrome bug where setting defaultChecked
  // will sometimes influence the value of checked (even after detachment).
  // Reference: https://bugs.chromium.org/p/chromium/issues/detail?id=608416
  // We need to temporarily unset name to avoid disrupting radio button groups.


  var name = node.name;

  if (name !== '') {
    node.name = '';
  }

  if (disableInputAttributeSyncing) {
    // When not syncing the checked attribute, the checked property
    // never gets assigned. It must be manually set. We don't want
    // to do this when hydrating so that existing user input isn't
    // modified
    if (!isHydrating) {
      updateChecked(element, props);
    } // Only assign the checked attribute if it is defined. This saves
    // a DOM write when controlling the checked attribute isn't needed
    // (text inputs, submit/reset)


    if (props.hasOwnProperty('defaultChecked')) {
      node.defaultChecked = !node.defaultChecked;
      node.defaultChecked = !!props.defaultChecked;
    }
  } else {
    // When syncing the checked attribute, both the checked property and
    // attribute are assigned at the same time using defaultChecked. This uses:
    //
    //   1. The checked React property when present
    //   2. The defaultChecked React property when present
    //   3. Otherwise, false
    node.defaultChecked = !node.defaultChecked;
    node.defaultChecked = !!node._wrapperState.initialChecked;
  }

  if (name !== '') {
    node.name = name;
  }
}
function restoreControlledState$1(element, props) {
  var node = element;
  updateWrapper(node, props);
  updateNamedCousins(node, props);
}

function updateNamedCousins(rootNode, props) {
  var name = props.name;

  if (props.type === 'radio' && name != null) {
    var queryRoot = rootNode;

    while (queryRoot.parentNode) {
      queryRoot = queryRoot.parentNode;
    } // If `rootNode.form` was non-null, then we could try `form.elements`,
    // but that sometimes behaves strangely in IE8. We could also try using
    // `form.getElementsByName`, but that will only return direct children
    // and won't include inputs that use the HTML5 `form=` attribute. Since
    // the input might not even be in a form. It might not even be in the
    // document. Let's just use the local `querySelectorAll` to ensure we don't
    // miss anything.


    var group = queryRoot.querySelectorAll('input[name=' + JSON.stringify('' + name) + '][type="radio"]');

    for (var i = 0; i < group.length; i++) {
      var otherNode = group[i];

      if (otherNode === rootNode || otherNode.form !== rootNode.form) {
        continue;
      } // This will throw if radio buttons rendered by different copies of React
      // and the same name are rendered into the same form (same as #1939).
      // That's probably okay; we don't support it just as we don't support
      // mixing React radio buttons with non-React ones.


      var otherProps = getFiberCurrentPropsFromNode$1(otherNode);

      if (!otherProps) {
        {
          throw Error("ReactDOMInput: Mixing React and non-React radio inputs with the same `name` is not supported.");
        }
      } // We need update the tracked value on the named cousin since the value
      // was changed but the input saw no event or value set


      updateValueIfChanged(otherNode); // If this is a controlled radio button group, forcing the input that
      // was previously checked to update will cause it to be come re-checked
      // as appropriate.

      updateWrapper(otherNode, otherProps);
    }
  }
} // In Chrome, assigning defaultValue to certain input types triggers input validation.
// For number inputs, the display value loses trailing decimal points. For email inputs,
// Chrome raises "The specified value <x> is not a valid email address".
//
// Here we check to see if the defaultValue has actually changed, avoiding these problems
// when the user is inputting text
//
// https://github.com/facebook/react/issues/7253


function setDefaultValue(node, type, value) {
  if ( // Focused number inputs synchronize on blur. See ChangeEventPlugin.js
  type !== 'number' || node.ownerDocument.activeElement !== node) {
    if (value == null) {
      node.defaultValue = toString(node._wrapperState.initialValue);
    } else if (node.defaultValue !== toString(value)) {
      node.defaultValue = toString(value);
    }
  }
}

var didWarnSelectedSetOnOption = false;
var didWarnInvalidChild = false;

function flattenChildren(children) {
  var content = ''; // Flatten children. We'll warn if they are invalid
  // during validateProps() which runs for hydration too.
  // Note that this would throw on non-element objects.
  // Elements are stringified (which is normally irrelevant
  // but matters for <fbt>).

  React.Children.forEach(children, function (child) {
    if (child == null) {
      return;
    }

    content += child; // Note: we don't warn about invalid children here.
    // Instead, this is done separately below so that
    // it happens during the hydration codepath too.
  });
  return content;
}
/**
 * Implements an <option> host component that warns when `selected` is set.
 */


function validateProps(element, props) {
  {
    // This mirrors the codepath above, but runs for hydration too.
    // Warn about invalid children here so that client and hydration are consistent.
    // TODO: this seems like it could cause a DEV-only throw for hydration
    // if children contains a non-element object. We should try to avoid that.
    if (typeof props.children === 'object' && props.children !== null) {
      React.Children.forEach(props.children, function (child) {
        if (child == null) {
          return;
        }

        if (typeof child === 'string' || typeof child === 'number') {
          return;
        }

        if (typeof child.type !== 'string') {
          return;
        }

        if (!didWarnInvalidChild) {
          didWarnInvalidChild = true;
          warning$1(false, 'Only strings and numbers are supported as <option> children.');
        }
      });
    } // TODO: Remove support for `selected` in <option>.


    if (props.selected != null && !didWarnSelectedSetOnOption) {
      warning$1(false, 'Use the `defaultValue` or `value` props on <select> instead of ' + 'setting `selected` on <option>.');
      didWarnSelectedSetOnOption = true;
    }
  }
}
function postMountWrapper$1(element, props) {
  // value="" should make a value attribute (#6219)
  if (props.value != null) {
    element.setAttribute('value', toString(getToStringValue(props.value)));
  }
}
function getHostProps$1(element, props) {
  var hostProps = _assign({
    children: undefined
  }, props);

  var content = flattenChildren(props.children);

  if (content) {
    hostProps.children = content;
  }

  return hostProps;
}

// TODO: direct imports like some-package/src/* are bad. Fix me.
var didWarnValueDefaultValue$1;

{
  didWarnValueDefaultValue$1 = false;
}

function getDeclarationErrorAddendum() {
  var ownerName = getCurrentFiberOwnerNameInDevOrNull();

  if (ownerName) {
    return '\n\nCheck the render method of `' + ownerName + '`.';
  }

  return '';
}

var valuePropNames = ['value', 'defaultValue'];
/**
 * Validation function for `value` and `defaultValue`.
 */

function checkSelectPropTypes(props) {
  ReactControlledValuePropTypes.checkPropTypes('select', props);

  for (var i = 0; i < valuePropNames.length; i++) {
    var propName = valuePropNames[i];

    if (props[propName] == null) {
      continue;
    }

    var isArray = Array.isArray(props[propName]);

    if (props.multiple && !isArray) {
      warning$1(false, 'The `%s` prop supplied to <select> must be an array if ' + '`multiple` is true.%s', propName, getDeclarationErrorAddendum());
    } else if (!props.multiple && isArray) {
      warning$1(false, 'The `%s` prop supplied to <select> must be a scalar ' + 'value if `multiple` is false.%s', propName, getDeclarationErrorAddendum());
    }
  }
}

function updateOptions(node, multiple, propValue, setDefaultSelected) {
  var options = node.options;

  if (multiple) {
    var selectedValues = propValue;
    var selectedValue = {};

    for (var i = 0; i < selectedValues.length; i++) {
      // Prefix to avoid chaos with special keys.
      selectedValue['$' + selectedValues[i]] = true;
    }

    for (var _i = 0; _i < options.length; _i++) {
      var selected = selectedValue.hasOwnProperty('$' + options[_i].value);

      if (options[_i].selected !== selected) {
        options[_i].selected = selected;
      }

      if (selected && setDefaultSelected) {
        options[_i].defaultSelected = true;
      }
    }
  } else {
    // Do not set `select.value` as exact behavior isn't consistent across all
    // browsers for all cases.
    var _selectedValue = toString(getToStringValue(propValue));

    var defaultSelected = null;

    for (var _i2 = 0; _i2 < options.length; _i2++) {
      if (options[_i2].value === _selectedValue) {
        options[_i2].selected = true;

        if (setDefaultSelected) {
          options[_i2].defaultSelected = true;
        }

        return;
      }

      if (defaultSelected === null && !options[_i2].disabled) {
        defaultSelected = options[_i2];
      }
    }

    if (defaultSelected !== null) {
      defaultSelected.selected = true;
    }
  }
}
/**
 * Implements a <select> host component that allows optionally setting the
 * props `value` and `defaultValue`. If `multiple` is false, the prop must be a
 * stringable. If `multiple` is true, the prop must be an array of stringables.
 *
 * If `value` is not supplied (or null/undefined), user actions that change the
 * selected option will trigger updates to the rendered options.
 *
 * If it is supplied (and not null/undefined), the rendered options will not
 * update in response to user actions. Instead, the `value` prop must change in
 * order for the rendered options to update.
 *
 * If `defaultValue` is provided, any options with the supplied values will be
 * selected.
 */


function getHostProps$2(element, props) {
  return _assign({}, props, {
    value: undefined
  });
}
function initWrapperState$1(element, props) {
  var node = element;

  {
    checkSelectPropTypes(props);
  }

  node._wrapperState = {
    wasMultiple: !!props.multiple
  };

  {
    if (props.value !== undefined && props.defaultValue !== undefined && !didWarnValueDefaultValue$1) {
      warning$1(false, 'Select elements must be either controlled or uncontrolled ' + '(specify either the value prop, or the defaultValue prop, but not ' + 'both). Decide between using a controlled or uncontrolled select ' + 'element and remove one of these props. More info: ' + 'https://fb.me/react-controlled-components');
      didWarnValueDefaultValue$1 = true;
    }
  }
}
function postMountWrapper$2(element, props) {
  var node = element;
  node.multiple = !!props.multiple;
  var value = props.value;

  if (value != null) {
    updateOptions(node, !!props.multiple, value, false);
  } else if (props.defaultValue != null) {
    updateOptions(node, !!props.multiple, props.defaultValue, true);
  }
}
function postUpdateWrapper(element, props) {
  var node = element;
  var wasMultiple = node._wrapperState.wasMultiple;
  node._wrapperState.wasMultiple = !!props.multiple;
  var value = props.value;

  if (value != null) {
    updateOptions(node, !!props.multiple, value, false);
  } else if (wasMultiple !== !!props.multiple) {
    // For simplicity, reapply `defaultValue` if `multiple` is toggled.
    if (props.defaultValue != null) {
      updateOptions(node, !!props.multiple, props.defaultValue, true);
    } else {
      // Revert the select back to its default unselected state.
      updateOptions(node, !!props.multiple, props.multiple ? [] : '', false);
    }
  }
}
function restoreControlledState$2(element, props) {
  var node = element;
  var value = props.value;

  if (value != null) {
    updateOptions(node, !!props.multiple, value, false);
  }
}

var didWarnValDefaultVal = false;

/**
 * Implements a <textarea> host component that allows setting `value`, and
 * `defaultValue`. This differs from the traditional DOM API because value is
 * usually set as PCDATA children.
 *
 * If `value` is not supplied (or null/undefined), user actions that affect the
 * value will trigger updates to the element.
 *
 * If `value` is supplied (and not null/undefined), the rendered element will
 * not trigger updates to the element. Instead, the `value` prop must change in
 * order for the rendered element to be updated.
 *
 * The rendered element will be initialized with an empty value, the prop
 * `defaultValue` if specified, or the children content (deprecated).
 */
function getHostProps$3(element, props) {
  var node = element;

  if (!(props.dangerouslySetInnerHTML == null)) {
    {
      throw Error("`dangerouslySetInnerHTML` does not make sense on <textarea>.");
    }
  } // Always set children to the same thing. In IE9, the selection range will
  // get reset if `textContent` is mutated.  We could add a check in setTextContent
  // to only set the value if/when the value differs from the node value (which would
  // completely solve this IE9 bug), but Sebastian+Sophie seemed to like this
  // solution. The value can be a boolean or object so that's why it's forced
  // to be a string.


  var hostProps = _assign({}, props, {
    value: undefined,
    defaultValue: undefined,
    children: toString(node._wrapperState.initialValue)
  });

  return hostProps;
}
function initWrapperState$2(element, props) {
  var node = element;

  {
    ReactControlledValuePropTypes.checkPropTypes('textarea', props);

    if (props.value !== undefined && props.defaultValue !== undefined && !didWarnValDefaultVal) {
      warning$1(false, '%s contains a textarea with both value and defaultValue props. ' + 'Textarea elements must be either controlled or uncontrolled ' + '(specify either the value prop, or the defaultValue prop, but not ' + 'both). Decide between using a controlled or uncontrolled textarea ' + 'and remove one of these props. More info: ' + 'https://fb.me/react-controlled-components', getCurrentFiberOwnerNameInDevOrNull() || 'A component');
      didWarnValDefaultVal = true;
    }
  }

  var initialValue = props.value; // Only bother fetching default value if we're going to use it

  if (initialValue == null) {
    var defaultValue = props.defaultValue; // TODO (yungsters): Remove support for children content in <textarea>.

    var children = props.children;

    if (children != null) {
      {
        warning$1(false, 'Use the `defaultValue` or `value` props instead of setting ' + 'children on <textarea>.');
      }

      if (!(defaultValue == null)) {
        {
          throw Error("If you supply `defaultValue` on a <textarea>, do not pass children.");
        }
      }

      if (Array.isArray(children)) {
        if (!(children.length <= 1)) {
          {
            throw Error("<textarea> can only have at most one child.");
          }
        }

        children = children[0];
      }

      defaultValue = children;
    }

    if (defaultValue == null) {
      defaultValue = '';
    }

    initialValue = defaultValue;
  }

  node._wrapperState = {
    initialValue: getToStringValue(initialValue)
  };
}
function updateWrapper$1(element, props) {
  var node = element;
  var value = getToStringValue(props.value);
  var defaultValue = getToStringValue(props.defaultValue);

  if (value != null) {
    // Cast `value` to a string to ensure the value is set correctly. While
    // browsers typically do this as necessary, jsdom doesn't.
    var newValue = toString(value); // To avoid side effects (such as losing text selection), only set value if changed

    if (newValue !== node.value) {
      node.value = newValue;
    }

    if (props.defaultValue == null && node.defaultValue !== newValue) {
      node.defaultValue = newValue;
    }
  }

  if (defaultValue != null) {
    node.defaultValue = toString(defaultValue);
  }
}
function postMountWrapper$3(element, props) {
  var node = element; // This is in postMount because we need access to the DOM node, which is not
  // available until after the component has mounted.

  var textContent = node.textContent; // Only set node.value if textContent is equal to the expected
  // initial value. In IE10/IE11 there is a bug where the placeholder attribute
  // will populate textContent as well.
  // https://developer.microsoft.com/microsoft-edge/platform/issues/101525/

  if (textContent === node._wrapperState.initialValue) {
    if (textContent !== '' && textContent !== null) {
      node.value = textContent;
    }
  }
}
function restoreControlledState$3(element, props) {
  // DOM component is still mounted; update
  updateWrapper$1(element, props);
}

var HTML_NAMESPACE$1 = 'http://www.w3.org/1999/xhtml';
var MATH_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
var SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
var Namespaces = {
  html: HTML_NAMESPACE$1,
  mathml: MATH_NAMESPACE,
  svg: SVG_NAMESPACE
}; // Assumes there is no parent namespace.

function getIntrinsicNamespace(type) {
  switch (type) {
    case 'svg':
      return SVG_NAMESPACE;

    case 'math':
      return MATH_NAMESPACE;

    default:
      return HTML_NAMESPACE$1;
  }
}
function getChildNamespace(parentNamespace, type) {
  if (parentNamespace == null || parentNamespace === HTML_NAMESPACE$1) {
    // No (or default) parent namespace: potential entry point.
    return getIntrinsicNamespace(type);
  }

  if (parentNamespace === SVG_NAMESPACE && type === 'foreignObject') {
    // We're leaving SVG.
    return HTML_NAMESPACE$1;
  } // By default, pass namespace below.


  return parentNamespace;
}

/* globals MSApp */

/**
 * Create a function which has 'unsafe' privileges (required by windows8 apps)
 */
var createMicrosoftUnsafeLocalFunction = function (func) {
  if (typeof MSApp !== 'undefined' && MSApp.execUnsafeLocalFunction) {
    return function (arg0, arg1, arg2, arg3) {
      MSApp.execUnsafeLocalFunction(function () {
        return func(arg0, arg1, arg2, arg3);
      });
    };
  } else {
    return func;
  }
};

var reusableSVGContainer;
/**
 * Set the innerHTML property of a node
 *
 * @param {DOMElement} node
 * @param {string} html
 * @internal
 */

var setInnerHTML = createMicrosoftUnsafeLocalFunction(function (node, html) {
  if (node.namespaceURI === Namespaces.svg) {
    {
      if (enableTrustedTypesIntegration) {
        // TODO: reconsider the text of this warning and when it should show
        // before enabling the feature flag.
        !(typeof trustedTypes === 'undefined') ? warning$1(false, "Using 'dangerouslySetInnerHTML' in an svg element with " + 'Trusted Types enabled in an Internet Explorer will cause ' + 'the trusted value to be converted to string. Assigning string ' + "to 'innerHTML' will throw an error if Trusted Types are enforced. " + "You can try to wrap your svg element inside a div and use 'dangerouslySetInnerHTML' " + 'on the enclosing div instead.') : void 0;
      }
    }

    if (!('innerHTML' in node)) {
      // IE does not have innerHTML for SVG nodes, so instead we inject the
      // new markup in a temp node and then move the child nodes across into
      // the target node
      reusableSVGContainer = reusableSVGContainer || document.createElement('div');
      reusableSVGContainer.innerHTML = '<svg>' + html.valueOf().toString() + '</svg>';
      var svgNode = reusableSVGContainer.firstChild;

      while (node.firstChild) {
        node.removeChild(node.firstChild);
      }

      while (svgNode.firstChild) {
        node.appendChild(svgNode.firstChild);
      }

      return;
    }
  }

  node.innerHTML = html;
});

/**
 * HTML nodeType values that represent the type of the node
 */
var ELEMENT_NODE = 1;
var TEXT_NODE = 3;
var COMMENT_NODE = 8;
var DOCUMENT_NODE = 9;
var DOCUMENT_FRAGMENT_NODE = 11;

/**
 * Set the textContent property of a node. For text updates, it's faster
 * to set the `nodeValue` of the Text node directly instead of using
 * `.textContent` which will remove the existing node and create a new one.
 *
 * @param {DOMElement} node
 * @param {string} text
 * @internal
 */

var setTextContent = function (node, text) {
  if (text) {
    var firstChild = node.firstChild;

    if (firstChild && firstChild === node.lastChild && firstChild.nodeType === TEXT_NODE) {
      firstChild.nodeValue = text;
      return;
    }
  }

  node.textContent = text;
};

// Do not use the below two methods directly!
// Instead use constants exported from DOMTopLevelEventTypes in ReactDOM.
// (It is the only module that is allowed to access these methods.)
function unsafeCastStringToDOMTopLevelType(topLevelType) {
  return topLevelType;
}
function unsafeCastDOMTopLevelTypeToString(topLevelType) {
  return topLevelType;
}

/**
 * Generate a mapping of standard vendor prefixes using the defined style property and event name.
 *
 * @param {string} styleProp
 * @param {string} eventName
 * @returns {object}
 */

function makePrefixMap(styleProp, eventName) {
  var prefixes = {};
  prefixes[styleProp.toLowerCase()] = eventName.toLowerCase();
  prefixes['Webkit' + styleProp] = 'webkit' + eventName;
  prefixes['Moz' + styleProp] = 'moz' + eventName;
  return prefixes;
}
/**
 * A list of event names to a configurable list of vendor prefixes.
 */


var vendorPrefixes = {
  animationend: makePrefixMap('Animation', 'AnimationEnd'),
  animationiteration: makePrefixMap('Animation', 'AnimationIteration'),
  animationstart: makePrefixMap('Animation', 'AnimationStart'),
  transitionend: makePrefixMap('Transition', 'TransitionEnd')
};
/**
 * Event names that have already been detected and prefixed (if applicable).
 */

var prefixedEventNames = {};
/**
 * Element to check for prefixes on.
 */

var style = {};
/**
 * Bootstrap if a DOM exists.
 */

if (canUseDOM) {
  style = document.createElement('div').style; // On some platforms, in particular some releases of Android 4.x,
  // the un-prefixed "animation" and "transition" properties are defined on the
  // style object but the events that fire will still be prefixed, so we need
  // to check if the un-prefixed events are usable, and if not remove them from the map.

  if (!('AnimationEvent' in window)) {
    delete vendorPrefixes.animationend.animation;
    delete vendorPrefixes.animationiteration.animation;
    delete vendorPrefixes.animationstart.animation;
  } // Same as above


  if (!('TransitionEvent' in window)) {
    delete vendorPrefixes.transitionend.transition;
  }
}
/**
 * Attempts to determine the correct vendor prefixed event name.
 *
 * @param {string} eventName
 * @returns {string}
 */


function getVendorPrefixedEventName(eventName) {
  if (prefixedEventNames[eventName]) {
    return prefixedEventNames[eventName];
  } else if (!vendorPrefixes[eventName]) {
    return eventName;
  }

  var prefixMap = vendorPrefixes[eventName];

  for (var styleProp in prefixMap) {
    if (prefixMap.hasOwnProperty(styleProp) && styleProp in style) {
      return prefixedEventNames[eventName] = prefixMap[styleProp];
    }
  }

  return eventName;
}

/**
 * To identify top level events in ReactDOM, we use constants defined by this
 * module. This is the only module that uses the unsafe* methods to express
 * that the constants actually correspond to the browser event names. This lets
 * us save some bundle size by avoiding a top level type -> event name map.
 * The rest of ReactDOM code should import top level types from this file.
 */

var TOP_ABORT = unsafeCastStringToDOMTopLevelType('abort');
var TOP_ANIMATION_END = unsafeCastStringToDOMTopLevelType(getVendorPrefixedEventName('animationend'));
var TOP_ANIMATION_ITERATION = unsafeCastStringToDOMTopLevelType(getVendorPrefixedEventName('animationiteration'));
var TOP_ANIMATION_START = unsafeCastStringToDOMTopLevelType(getVendorPrefixedEventName('animationstart'));
var TOP_BLUR = unsafeCastStringToDOMTopLevelType('blur');
var TOP_CAN_PLAY = unsafeCastStringToDOMTopLevelType('canplay');
var TOP_CAN_PLAY_THROUGH = unsafeCastStringToDOMTopLevelType('canplaythrough');
var TOP_CANCEL = unsafeCastStringToDOMTopLevelType('cancel');
var TOP_CHANGE = unsafeCastStringToDOMTopLevelType('change');
var TOP_CLICK = unsafeCastStringToDOMTopLevelType('click');
var TOP_CLOSE = unsafeCastStringToDOMTopLevelType('close');
var TOP_COMPOSITION_END = unsafeCastStringToDOMTopLevelType('compositionend');
var TOP_COMPOSITION_START = unsafeCastStringToDOMTopLevelType('compositionstart');
var TOP_COMPOSITION_UPDATE = unsafeCastStringToDOMTopLevelType('compositionupdate');
var TOP_CONTEXT_MENU = unsafeCastStringToDOMTopLevelType('contextmenu');
var TOP_COPY = unsafeCastStringToDOMTopLevelType('copy');
var TOP_CUT = unsafeCastStringToDOMTopLevelType('cut');
var TOP_DOUBLE_CLICK = unsafeCastStringToDOMTopLevelType('dblclick');
var TOP_AUX_CLICK = unsafeCastStringToDOMTopLevelType('auxclick');
var TOP_DRAG = unsafeCastStringToDOMTopLevelType('drag');
var TOP_DRAG_END = unsafeCastStringToDOMTopLevelType('dragend');
var TOP_DRAG_ENTER = unsafeCastStringToDOMTopLevelType('dragenter');
var TOP_DRAG_EXIT = unsafeCastStringToDOMTopLevelType('dragexit');
var TOP_DRAG_LEAVE = unsafeCastStringToDOMTopLevelType('dragleave');
var TOP_DRAG_OVER = unsafeCastStringToDOMTopLevelType('dragover');
var TOP_DRAG_START = unsafeCastStringToDOMTopLevelType('dragstart');
var TOP_DROP = unsafeCastStringToDOMTopLevelType('drop');
var TOP_DURATION_CHANGE = unsafeCastStringToDOMTopLevelType('durationchange');
var TOP_EMPTIED = unsafeCastStringToDOMTopLevelType('emptied');
var TOP_ENCRYPTED = unsafeCastStringToDOMTopLevelType('encrypted');
var TOP_ENDED = unsafeCastStringToDOMTopLevelType('ended');
var TOP_ERROR = unsafeCastStringToDOMTopLevelType('error');
var TOP_FOCUS = unsafeCastStringToDOMTopLevelType('focus');
var TOP_GOT_POINTER_CAPTURE = unsafeCastStringToDOMTopLevelType('gotpointercapture');
var TOP_INPUT = unsafeCastStringToDOMTopLevelType('input');
var TOP_INVALID = unsafeCastStringToDOMTopLevelType('invalid');
var TOP_KEY_DOWN = unsafeCastStringToDOMTopLevelType('keydown');
var TOP_KEY_PRESS = unsafeCastStringToDOMTopLevelType('keypress');
var TOP_KEY_UP = unsafeCastStringToDOMTopLevelType('keyup');
var TOP_LOAD = unsafeCastStringToDOMTopLevelType('load');
var TOP_LOAD_START = unsafeCastStringToDOMTopLevelType('loadstart');
var TOP_LOADED_DATA = unsafeCastStringToDOMTopLevelType('loadeddata');
var TOP_LOADED_METADATA = unsafeCastStringToDOMTopLevelType('loadedmetadata');
var TOP_LOST_POINTER_CAPTURE = unsafeCastStringToDOMTopLevelType('lostpointercapture');
var TOP_MOUSE_DOWN = unsafeCastStringToDOMTopLevelType('mousedown');
var TOP_MOUSE_MOVE = unsafeCastStringToDOMTopLevelType('mousemove');
var TOP_MOUSE_OUT = unsafeCastStringToDOMTopLevelType('mouseout');
var TOP_MOUSE_OVER = unsafeCastStringToDOMTopLevelType('mouseover');
var TOP_MOUSE_UP = unsafeCastStringToDOMTopLevelType('mouseup');
var TOP_PASTE = unsafeCastStringToDOMTopLevelType('paste');
var TOP_PAUSE = unsafeCastStringToDOMTopLevelType('pause');
var TOP_PLAY = unsafeCastStringToDOMTopLevelType('play');
var TOP_PLAYING = unsafeCastStringToDOMTopLevelType('playing');
var TOP_POINTER_CANCEL = unsafeCastStringToDOMTopLevelType('pointercancel');
var TOP_POINTER_DOWN = unsafeCastStringToDOMTopLevelType('pointerdown');


var TOP_POINTER_MOVE = unsafeCastStringToDOMTopLevelType('pointermove');
var TOP_POINTER_OUT = unsafeCastStringToDOMTopLevelType('pointerout');
var TOP_POINTER_OVER = unsafeCastStringToDOMTopLevelType('pointerover');
var TOP_POINTER_UP = unsafeCastStringToDOMTopLevelType('pointerup');
var TOP_PROGRESS = unsafeCastStringToDOMTopLevelType('progress');
var TOP_RATE_CHANGE = unsafeCastStringToDOMTopLevelType('ratechange');
var TOP_RESET = unsafeCastStringToDOMTopLevelType('reset');
var TOP_SCROLL = unsafeCastStringToDOMTopLevelType('scroll');
var TOP_SEEKED = unsafeCastStringToDOMTopLevelType('seeked');
var TOP_SEEKING = unsafeCastStringToDOMTopLevelType('seeking');
var TOP_SELECTION_CHANGE = unsafeCastStringToDOMTopLevelType('selectionchange');
var TOP_STALLED = unsafeCastStringToDOMTopLevelType('stalled');
var TOP_SUBMIT = unsafeCastStringToDOMTopLevelType('submit');
var TOP_SUSPEND = unsafeCastStringToDOMTopLevelType('suspend');
var TOP_TEXT_INPUT = unsafeCastStringToDOMTopLevelType('textInput');
var TOP_TIME_UPDATE = unsafeCastStringToDOMTopLevelType('timeupdate');
var TOP_TOGGLE = unsafeCastStringToDOMTopLevelType('toggle');
var TOP_TOUCH_CANCEL = unsafeCastStringToDOMTopLevelType('touchcancel');
var TOP_TOUCH_END = unsafeCastStringToDOMTopLevelType('touchend');
var TOP_TOUCH_MOVE = unsafeCastStringToDOMTopLevelType('touchmove');
var TOP_TOUCH_START = unsafeCastStringToDOMTopLevelType('touchstart');
var TOP_TRANSITION_END = unsafeCastStringToDOMTopLevelType(getVendorPrefixedEventName('transitionend'));
var TOP_VOLUME_CHANGE = unsafeCastStringToDOMTopLevelType('volumechange');
var TOP_WAITING = unsafeCastStringToDOMTopLevelType('waiting');
var TOP_WHEEL = unsafeCastStringToDOMTopLevelType('wheel'); // List of events that need to be individually attached to media elements.
// Note that events in this list will *not* be listened to at the top level
// unless they're explicitly whitelisted in `ReactBrowserEventEmitter.listenTo`.

var mediaEventTypes = [TOP_ABORT, TOP_CAN_PLAY, TOP_CAN_PLAY_THROUGH, TOP_DURATION_CHANGE, TOP_EMPTIED, TOP_ENCRYPTED, TOP_ENDED, TOP_ERROR, TOP_LOADED_DATA, TOP_LOADED_METADATA, TOP_LOAD_START, TOP_PAUSE, TOP_PLAY, TOP_PLAYING, TOP_PROGRESS, TOP_RATE_CHANGE, TOP_SEEKED, TOP_SEEKING, TOP_STALLED, TOP_SUSPEND, TOP_TIME_UPDATE, TOP_VOLUME_CHANGE, TOP_WAITING];
function getRawEventName(topLevelType) {
  return unsafeCastDOMTopLevelTypeToString(topLevelType);
}

/**
 * `ReactInstanceMap` maintains a mapping from a public facing stateful
 * instance (key) and the internal representation (value). This allows public
 * methods to accept the user facing instance as an argument and map them back
 * to internal methods.
 *
 * Note that this module is currently shared and assumed to be stateless.
 * If this becomes an actual Map, that will break.
 */

/**
 * This API should be called `delete` but we'd have to make sure to always
 * transform these to strings for IE support. When this transform is fully
 * supported we can rename it.
 */

function get(key) {
  return key._reactInternalFiber;
}
function has(key) {
  return key._reactInternalFiber !== undefined;
}
function set(key, value) {
  key._reactInternalFiber = value;
}

// Don't change these two values. They're used by React Dev Tools.
var NoEffect =
/*              */
0;
var PerformedWork =
/*         */
1; // You can change the rest (and add more).

var Placement =
/*             */
2;
var Update =
/*                */
4;
var PlacementAndUpdate =
/*    */
6;
var Deletion =
/*              */
8;
var ContentReset =
/*          */
16;
var Callback =
/*              */
32;
var DidCapture =
/*            */
64;
var Ref =
/*                   */
128;
var Snapshot =
/*              */
256;
var Passive =
/*               */
512;
var Hydrating =
/*             */
1024;
var HydratingAndUpdate =
/*    */
1028; // Passive & Update & Callback & Ref & Snapshot

var LifecycleEffectMask =
/*   */
932; // Union of all host effects

var HostEffectMask =
/*        */
2047;
var Incomplete =
/*            */
2048;
var ShouldCapture =
/*         */
4096;

var ReactCurrentOwner$1 = ReactSharedInternals.ReactCurrentOwner;
function getNearestMountedFiber(fiber) {
  var node = fiber;
  var nearestMounted = fiber;

  if (!fiber.alternate) {
    // If there is no alternate, this might be a new tree that isn't inserted
    // yet. If it is, then it will have a pending insertion effect on it.
    var nextNode = node;

    do {
      node = nextNode;

      if ((node.effectTag & (Placement | Hydrating)) !== NoEffect) {
        // This is an insertion or in-progress hydration. The nearest possible
        // mounted fiber is the parent but we need to continue to figure out
        // if that one is still mounted.
        nearestMounted = node.return;
      }

      nextNode = node.return;
    } while (nextNode);
  } else {
    while (node.return) {
      node = node.return;
    }
  }

  if (node.tag === HostRoot) {
    // TODO: Check if this was a nested HostRoot when used with
    // renderContainerIntoSubtree.
    return nearestMounted;
  } // If we didn't hit the root, that means that we're in an disconnected tree
  // that has been unmounted.


  return null;
}
function getSuspenseInstanceFromFiber(fiber) {
  if (fiber.tag === SuspenseComponent) {
    var suspenseState = fiber.memoizedState;

    if (suspenseState === null) {
      var current = fiber.alternate;

      if (current !== null) {
        suspenseState = current.memoizedState;
      }
    }

    if (suspenseState !== null) {
      return suspenseState.dehydrated;
    }
  }

  return null;
}
function getContainerFromFiber(fiber) {
  return fiber.tag === HostRoot ? fiber.stateNode.containerInfo : null;
}
function isFiberMounted(fiber) {
  return getNearestMountedFiber(fiber) === fiber;
}
function isMounted(component) {
  {
    var owner = ReactCurrentOwner$1.current;

    if (owner !== null && owner.tag === ClassComponent) {
      var ownerFiber = owner;
      var instance = ownerFiber.stateNode;
      !instance._warnedAboutRefsInRender ? warningWithoutStack$1(false, '%s is accessing isMounted inside its render() function. ' + 'render() should be a pure function of props and state. It should ' + 'never access something that requires stale data from the previous ' + 'render, such as refs. Move this logic to componentDidMount and ' + 'componentDidUpdate instead.', getComponentName(ownerFiber.type) || 'A component') : void 0;
      instance._warnedAboutRefsInRender = true;
    }
  }

  var fiber = get(component);

  if (!fiber) {
    return false;
  }

  return getNearestMountedFiber(fiber) === fiber;
}

function assertIsMounted(fiber) {
  if (!(getNearestMountedFiber(fiber) === fiber)) {
    {
      throw Error("Unable to find node on an unmounted component.");
    }
  }
}

function findCurrentFiberUsingSlowPath(fiber) {
  var alternate = fiber.alternate;

  if (!alternate) {
    // If there is no alternate, then we only need to check if it is mounted.
    var nearestMounted = getNearestMountedFiber(fiber);

    if (!(nearestMounted !== null)) {
      {
        throw Error("Unable to find node on an unmounted component.");
      }
    }

    if (nearestMounted !== fiber) {
      return null;
    }

    return fiber;
  } // If we have two possible branches, we'll walk backwards up to the root
  // to see what path the root points to. On the way we may hit one of the
  // special cases and we'll deal with them.


  var a = fiber;
  var b = alternate;

  while (true) {
    var parentA = a.return;

    if (parentA === null) {
      // We're at the root.
      break;
    }

    var parentB = parentA.alternate;

    if (parentB === null) {
      // There is no alternate. This is an unusual case. Currently, it only
      // happens when a Suspense component is hidden. An extra fragment fiber
      // is inserted in between the Suspense fiber and its children. Skip
      // over this extra fragment fiber and proceed to the next parent.
      var nextParent = parentA.return;

      if (nextParent !== null) {
        a = b = nextParent;
        continue;
      } // If there's no parent, we're at the root.


      break;
    } // If both copies of the parent fiber point to the same child, we can
    // assume that the child is current. This happens when we bailout on low
    // priority: the bailed out fiber's child reuses the current child.


    if (parentA.child === parentB.child) {
      var child = parentA.child;

      while (child) {
        if (child === a) {
          // We've determined that A is the current branch.
          assertIsMounted(parentA);
          return fiber;
        }

        if (child === b) {
          // We've determined that B is the current branch.
          assertIsMounted(parentA);
          return alternate;
        }

        child = child.sibling;
      } // We should never have an alternate for any mounting node. So the only
      // way this could possibly happen is if this was unmounted, if at all.


      {
        {
          throw Error("Unable to find node on an unmounted component.");
        }
      }
    }

    if (a.return !== b.return) {
      // The return pointer of A and the return pointer of B point to different
      // fibers. We assume that return pointers never criss-cross, so A must
      // belong to the child set of A.return, and B must belong to the child
      // set of B.return.
      a = parentA;
      b = parentB;
    } else {
      // The return pointers point to the same fiber. We'll have to use the
      // default, slow path: scan the child sets of each parent alternate to see
      // which child belongs to which set.
      //
      // Search parent A's child set
      var didFindChild = false;
      var _child = parentA.child;

      while (_child) {
        if (_child === a) {
          didFindChild = true;
          a = parentA;
          b = parentB;
          break;
        }

        if (_child === b) {
          didFindChild = true;
          b = parentA;
          a = parentB;
          break;
        }

        _child = _child.sibling;
      }

      if (!didFindChild) {
        // Search parent B's child set
        _child = parentB.child;

        while (_child) {
          if (_child === a) {
            didFindChild = true;
            a = parentB;
            b = parentA;
            break;
          }

          if (_child === b) {
            didFindChild = true;
            b = parentB;
            a = parentA;
            break;
          }

          _child = _child.sibling;
        }

        if (!didFindChild) {
          {
            throw Error("Child was not found in either parent set. This indicates a bug in React related to the return pointer. Please file an issue.");
          }
        }
      }
    }

    if (!(a.alternate === b)) {
      {
        throw Error("Return fibers should always be each others' alternates. This error is likely caused by a bug in React. Please file an issue.");
      }
    }
  } // If the root is not a host container, we're in a disconnected tree. I.e.
  // unmounted.


  if (!(a.tag === HostRoot)) {
    {
      throw Error("Unable to find node on an unmounted component.");
    }
  }

  if (a.stateNode.current === a) {
    // We've determined that A is the current branch.
    return fiber;
  } // Otherwise B has to be current branch.


  return alternate;
}
function findCurrentHostFiber(parent) {
  var currentParent = findCurrentFiberUsingSlowPath(parent);

  if (!currentParent) {
    return null;
  } // Next we'll drill down this component to find the first HostComponent/Text.


  var node = currentParent;

  while (true) {
    if (node.tag === HostComponent || node.tag === HostText) {
      return node;
    } else if (node.child) {
      node.child.return = node;
      node = node.child;
      continue;
    }

    if (node === currentParent) {
      return null;
    }

    while (!node.sibling) {
      if (!node.return || node.return === currentParent) {
        return null;
      }

      node = node.return;
    }

    node.sibling.return = node.return;
    node = node.sibling;
  } // Flow needs the return null here, but ESLint complains about it.
  // eslint-disable-next-line no-unreachable


  return null;
}
function findCurrentHostFiberWithNoPortals(parent) {
  var currentParent = findCurrentFiberUsingSlowPath(parent);

  if (!currentParent) {
    return null;
  } // Next we'll drill down this component to find the first HostComponent/Text.


  var node = currentParent;

  while (true) {
    if (node.tag === HostComponent || node.tag === HostText || enableFundamentalAPI && node.tag === FundamentalComponent) {
      return node;
    } else if (node.child && node.tag !== HostPortal) {
      node.child.return = node;
      node = node.child;
      continue;
    }

    if (node === currentParent) {
      return null;
    }

    while (!node.sibling) {
      if (!node.return || node.return === currentParent) {
        return null;
      }

      node = node.return;
    }

    node.sibling.return = node.return;
    node = node.sibling;
  } // Flow needs the return null here, but ESLint complains about it.
  // eslint-disable-next-line no-unreachable


  return null;
}

var attemptSynchronousHydration;
function setAttemptSynchronousHydration(fn) {
  attemptSynchronousHydration = fn;
}
var attemptUserBlockingHydration;
function setAttemptUserBlockingHydration(fn) {
  attemptUserBlockingHydration = fn;
}
var attemptContinuousHydration;
function setAttemptContinuousHydration(fn) {
  attemptContinuousHydration = fn;
}
var attemptHydrationAtCurrentPriority;
function setAttemptHydrationAtCurrentPriority(fn) {
  attemptHydrationAtCurrentPriority = fn;
} // TODO: Upgrade this definition once we're on a newer version of Flow that
// has this definition built-in.

var hasScheduledReplayAttempt = false; // The queue of discrete events to be replayed.

var queuedDiscreteEvents = []; // Indicates if any continuous event targets are non-null for early bailout.

// if the last target was dehydrated.

var queuedFocus = null;
var queuedDrag = null;
var queuedMouse = null; // For pointer events there can be one latest event per pointerId.

var queuedPointers = new Map();
var queuedPointerCaptures = new Map(); // We could consider replaying selectionchange and touchmoves too.

var queuedExplicitHydrationTargets = [];
function hasQueuedDiscreteEvents() {
  return queuedDiscreteEvents.length > 0;
}

var discreteReplayableEvents = [TOP_MOUSE_DOWN, TOP_MOUSE_UP, TOP_TOUCH_CANCEL, TOP_TOUCH_END, TOP_TOUCH_START, TOP_AUX_CLICK, TOP_DOUBLE_CLICK, TOP_POINTER_CANCEL, TOP_POINTER_DOWN, TOP_POINTER_UP, TOP_DRAG_END, TOP_DRAG_START, TOP_DROP, TOP_COMPOSITION_END, TOP_COMPOSITION_START, TOP_KEY_DOWN, TOP_KEY_PRESS, TOP_KEY_UP, TOP_INPUT, TOP_TEXT_INPUT, TOP_CLOSE, TOP_CANCEL, TOP_COPY, TOP_CUT, TOP_PASTE, TOP_CLICK, TOP_CHANGE, TOP_CONTEXT_MENU, TOP_RESET, TOP_SUBMIT];
var continuousReplayableEvents = [TOP_FOCUS, TOP_BLUR, TOP_DRAG_ENTER, TOP_DRAG_LEAVE, TOP_MOUSE_OVER, TOP_MOUSE_OUT, TOP_POINTER_OVER, TOP_POINTER_OUT, TOP_GOT_POINTER_CAPTURE, TOP_LOST_POINTER_CAPTURE];
function isReplayableDiscreteEvent(eventType) {
  return discreteReplayableEvents.indexOf(eventType) > -1;
}

function trapReplayableEvent(topLevelType, document, listeningSet) {
  listenToTopLevel(topLevelType, document, listeningSet);

  if (enableFlareAPI) {
    // Trap events for the responder system.
    var passiveEventKey = unsafeCastDOMTopLevelTypeToString(topLevelType) + '_passive';

    if (!listeningSet.has(passiveEventKey)) {
      trapEventForResponderEventSystem(document, topLevelType, true);
      listeningSet.add(passiveEventKey);
    } // TODO: This listens to all events as active which might have
    // undesirable effects. It's also unnecessary to have both
    // passive and active listeners. Instead, we could start with
    // a passive and upgrade it to an active one if needed.
    // For replaying purposes the active is never needed since we
    // currently don't preventDefault.


    var activeEventKey = unsafeCastDOMTopLevelTypeToString(topLevelType) + '_active';

    if (!listeningSet.has(activeEventKey)) {
      trapEventForResponderEventSystem(document, topLevelType, false);
      listeningSet.add(activeEventKey);
    }
  }
}

function eagerlyTrapReplayableEvents(document) {
  var listeningSet = getListeningSetForElement(document); // Discrete

  discreteReplayableEvents.forEach(function (topLevelType) {
    trapReplayableEvent(topLevelType, document, listeningSet);
  }); // Continuous

  continuousReplayableEvents.forEach(function (topLevelType) {
    trapReplayableEvent(topLevelType, document, listeningSet);
  });
}

function createQueuedReplayableEvent(blockedOn, topLevelType, eventSystemFlags, nativeEvent) {
  return {
    blockedOn: blockedOn,
    topLevelType: topLevelType,
    eventSystemFlags: eventSystemFlags | IS_REPLAYED,
    nativeEvent: nativeEvent
  };
}

function queueDiscreteEvent(blockedOn, topLevelType, eventSystemFlags, nativeEvent) {
  var queuedEvent = createQueuedReplayableEvent(blockedOn, topLevelType, eventSystemFlags, nativeEvent);
  queuedDiscreteEvents.push(queuedEvent);

  if (enableSelectiveHydration) {
    if (queuedDiscreteEvents.length === 1) {
      // If this was the first discrete event, we might be able to
      // synchronously unblock it so that preventDefault still works.
      while (queuedEvent.blockedOn !== null) {
        var _fiber = getInstanceFromNode$1(queuedEvent.blockedOn);

        if (_fiber === null) {
          break;
        }

        attemptSynchronousHydration(_fiber);

        if (queuedEvent.blockedOn === null) {
          // We got unblocked by hydration. Let's try again.
          replayUnblockedEvents(); // If we're reblocked, on an inner boundary, we might need
          // to attempt hydrating that one.

          continue;
        } else {
          // We're still blocked from hydation, we have to give up
          // and replay later.
          break;
        }
      }
    }
  }
} // Resets the replaying for this type of continuous event to no event.

function clearIfContinuousEvent(topLevelType, nativeEvent) {
  switch (topLevelType) {
    case TOP_FOCUS:
    case TOP_BLUR:
      queuedFocus = null;
      break;

    case TOP_DRAG_ENTER:
    case TOP_DRAG_LEAVE:
      queuedDrag = null;
      break;

    case TOP_MOUSE_OVER:
    case TOP_MOUSE_OUT:
      queuedMouse = null;
      break;

    case TOP_POINTER_OVER:
    case TOP_POINTER_OUT:
      {
        var pointerId = nativeEvent.pointerId;
        queuedPointers.delete(pointerId);
        break;
      }

    case TOP_GOT_POINTER_CAPTURE:
    case TOP_LOST_POINTER_CAPTURE:
      {
        var _pointerId = nativeEvent.pointerId;
        queuedPointerCaptures.delete(_pointerId);
        break;
      }
  }
}

function accumulateOrCreateContinuousQueuedReplayableEvent(existingQueuedEvent, blockedOn, topLevelType, eventSystemFlags, nativeEvent) {
  if (existingQueuedEvent === null || existingQueuedEvent.nativeEvent !== nativeEvent) {
    var queuedEvent = createQueuedReplayableEvent(blockedOn, topLevelType, eventSystemFlags, nativeEvent);

    if (blockedOn !== null) {
      var _fiber2 = getInstanceFromNode$1(blockedOn);

      if (_fiber2 !== null) {
        // Attempt to increase the priority of this target.
        attemptContinuousHydration(_fiber2);
      }
    }

    return queuedEvent;
  } // If we have already queued this exact event, then it's because
  // the different event systems have different DOM event listeners.
  // We can accumulate the flags and store a single event to be
  // replayed.


  existingQueuedEvent.eventSystemFlags |= eventSystemFlags;
  return existingQueuedEvent;
}

function queueIfContinuousEvent(blockedOn, topLevelType, eventSystemFlags, nativeEvent) {
  // These set relatedTarget to null because the replayed event will be treated as if we
  // moved from outside the window (no target) onto the target once it hydrates.
  // Instead of mutating we could clone the event.
  switch (topLevelType) {
    case TOP_FOCUS:
      {
        var focusEvent = nativeEvent;
        queuedFocus = accumulateOrCreateContinuousQueuedReplayableEvent(queuedFocus, blockedOn, topLevelType, eventSystemFlags, focusEvent);
        return true;
      }

    case TOP_DRAG_ENTER:
      {
        var dragEvent = nativeEvent;
        queuedDrag = accumulateOrCreateContinuousQueuedReplayableEvent(queuedDrag, blockedOn, topLevelType, eventSystemFlags, dragEvent);
        return true;
      }

    case TOP_MOUSE_OVER:
      {
        var mouseEvent = nativeEvent;
        queuedMouse = accumulateOrCreateContinuousQueuedReplayableEvent(queuedMouse, blockedOn, topLevelType, eventSystemFlags, mouseEvent);
        return true;
      }

    case TOP_POINTER_OVER:
      {
        var pointerEvent = nativeEvent;
        var pointerId = pointerEvent.pointerId;
        queuedPointers.set(pointerId, accumulateOrCreateContinuousQueuedReplayableEvent(queuedPointers.get(pointerId) || null, blockedOn, topLevelType, eventSystemFlags, pointerEvent));
        return true;
      }

    case TOP_GOT_POINTER_CAPTURE:
      {
        var _pointerEvent = nativeEvent;
        var _pointerId2 = _pointerEvent.pointerId;
        queuedPointerCaptures.set(_pointerId2, accumulateOrCreateContinuousQueuedReplayableEvent(queuedPointerCaptures.get(_pointerId2) || null, blockedOn, topLevelType, eventSystemFlags, _pointerEvent));
        return true;
      }
  }

  return false;
} // Check if this target is unblocked. Returns true if it's unblocked.

function attemptExplicitHydrationTarget(queuedTarget) {
  // TODO: This function shares a lot of logic with attemptToDispatchEvent.
  // Try to unify them. It's a bit tricky since it would require two return
  // values.
  var targetInst = getClosestInstanceFromNode(queuedTarget.target);

  if (targetInst !== null) {
    var nearestMounted = getNearestMountedFiber(targetInst);

    if (nearestMounted !== null) {
      var tag = nearestMounted.tag;

      if (tag === SuspenseComponent) {
        var instance = getSuspenseInstanceFromFiber(nearestMounted);

        if (instance !== null) {
          // We're blocked on hydrating this boundary.
          // Increase its priority.
          queuedTarget.blockedOn = instance;
          Scheduler.unstable_runWithPriority(queuedTarget.priority, function () {
            attemptHydrationAtCurrentPriority(nearestMounted);
          });
          return;
        }
      } else if (tag === HostRoot) {
        var root = nearestMounted.stateNode;

        if (root.hydrate) {
          queuedTarget.blockedOn = getContainerFromFiber(nearestMounted); // We don't currently have a way to increase the priority of
          // a root other than sync.

          return;
        }
      }
    }
  }

  queuedTarget.blockedOn = null;
}

function queueExplicitHydrationTarget(target) {
  if (enableSelectiveHydration) {
    var priority = Scheduler.unstable_getCurrentPriorityLevel();
    var queuedTarget = {
      blockedOn: null,
      target: target,
      priority: priority
    };
    var i = 0;

    for (; i < queuedExplicitHydrationTargets.length; i++) {
      if (priority <= queuedExplicitHydrationTargets[i].priority) {
        break;
      }
    }

    queuedExplicitHydrationTargets.splice(i, 0, queuedTarget);

    if (i === 0) {
      attemptExplicitHydrationTarget(queuedTarget);
    }
  }
}

function attemptReplayContinuousQueuedEvent(queuedEvent) {
  if (queuedEvent.blockedOn !== null) {
    return false;
  }

  var nextBlockedOn = attemptToDispatchEvent(queuedEvent.topLevelType, queuedEvent.eventSystemFlags, queuedEvent.nativeEvent);

  if (nextBlockedOn !== null) {
    // We're still blocked. Try again later.
    var _fiber3 = getInstanceFromNode$1(nextBlockedOn);

    if (_fiber3 !== null) {
      attemptContinuousHydration(_fiber3);
    }

    queuedEvent.blockedOn = nextBlockedOn;
    return false;
  }

  return true;
}

function attemptReplayContinuousQueuedEventInMap(queuedEvent, key, map) {
  if (attemptReplayContinuousQueuedEvent(queuedEvent)) {
    map.delete(key);
  }
}

function replayUnblockedEvents() {
  hasScheduledReplayAttempt = false; // First replay discrete events.

  while (queuedDiscreteEvents.length > 0) {
    var nextDiscreteEvent = queuedDiscreteEvents[0];

    if (nextDiscreteEvent.blockedOn !== null) {
      // We're still blocked.
      // Increase the priority of this boundary to unblock
      // the next discrete event.
      var _fiber4 = getInstanceFromNode$1(nextDiscreteEvent.blockedOn);

      if (_fiber4 !== null) {
        attemptUserBlockingHydration(_fiber4);
      }

      break;
    }

    var nextBlockedOn = attemptToDispatchEvent(nextDiscreteEvent.topLevelType, nextDiscreteEvent.eventSystemFlags, nextDiscreteEvent.nativeEvent);

    if (nextBlockedOn !== null) {
      // We're still blocked. Try again later.
      nextDiscreteEvent.blockedOn = nextBlockedOn;
    } else {
      // We've successfully replayed the first event. Let's try the next one.
      queuedDiscreteEvents.shift();
    }
  } // Next replay any continuous events.


  if (queuedFocus !== null && attemptReplayContinuousQueuedEvent(queuedFocus)) {
    queuedFocus = null;
  }

  if (queuedDrag !== null && attemptReplayContinuousQueuedEvent(queuedDrag)) {
    queuedDrag = null;
  }

  if (queuedMouse !== null && attemptReplayContinuousQueuedEvent(queuedMouse)) {
    queuedMouse = null;
  }

  queuedPointers.forEach(attemptReplayContinuousQueuedEventInMap);
  queuedPointerCaptures.forEach(attemptReplayContinuousQueuedEventInMap);
}

function scheduleCallbackIfUnblocked(queuedEvent, unblocked) {
  if (queuedEvent.blockedOn === unblocked) {
    queuedEvent.blockedOn = null;

    if (!hasScheduledReplayAttempt) {
      hasScheduledReplayAttempt = true; // Schedule a callback to attempt replaying as many events as are
      // now unblocked. This first might not actually be unblocked yet.
      // We could check it early to avoid scheduling an unnecessary callback.

      Scheduler.unstable_scheduleCallback(Scheduler.unstable_NormalPriority, replayUnblockedEvents);
    }
  }
}

function retryIfBlockedOn(unblocked) {
  // Mark anything that was blocked on this as no longer blocked
  // and eligible for a replay.
  if (queuedDiscreteEvents.length > 0) {
    scheduleCallbackIfUnblocked(queuedDiscreteEvents[0], unblocked); // This is a exponential search for each boundary that commits. I think it's
    // worth it because we expect very few discrete events to queue up and once
    // we are actually fully unblocked it will be fast to replay them.

    for (var i = 1; i < queuedDiscreteEvents.length; i++) {
      var queuedEvent = queuedDiscreteEvents[i];

      if (queuedEvent.blockedOn === unblocked) {
        queuedEvent.blockedOn = null;
      }
    }
  }

  if (queuedFocus !== null) {
    scheduleCallbackIfUnblocked(queuedFocus, unblocked);
  }

  if (queuedDrag !== null) {
    scheduleCallbackIfUnblocked(queuedDrag, unblocked);
  }

  if (queuedMouse !== null) {
    scheduleCallbackIfUnblocked(queuedMouse, unblocked);
  }

  var unblock = function (queuedEvent) {
    return scheduleCallbackIfUnblocked(queuedEvent, unblocked);
  };

  queuedPointers.forEach(unblock);
  queuedPointerCaptures.forEach(unblock);

  for (var _i = 0; _i < queuedExplicitHydrationTargets.length; _i++) {
    var queuedTarget = queuedExplicitHydrationTargets[_i];

    if (queuedTarget.blockedOn === unblocked) {
      queuedTarget.blockedOn = null;
    }
  }

  while (queuedExplicitHydrationTargets.length > 0) {
    var nextExplicitTarget = queuedExplicitHydrationTargets[0];

    if (nextExplicitTarget.blockedOn !== null) {
      // We're still blocked.
      break;
    } else {
      attemptExplicitHydrationTarget(nextExplicitTarget);

      if (nextExplicitTarget.blockedOn === null) {
        // We're unblocked.
        queuedExplicitHydrationTargets.shift();
      }
    }
  }
}

function addEventBubbleListener(element, eventType, listener) {
  element.addEventListener(eventType, listener, false);
}
function addEventCaptureListener(element, eventType, listener) {
  element.addEventListener(eventType, listener, true);
}
function addEventCaptureListenerWithPassiveFlag(element, eventType, listener, passive) {
  element.addEventListener(eventType, listener, {
    capture: true,
    passive: passive
  });
}

/**
 * Gets the target node from a native browser event by accounting for
 * inconsistencies in browser DOM APIs.
 *
 * @param {object} nativeEvent Native browser event.
 * @return {DOMEventTarget} Target node.
 */

function getEventTarget(nativeEvent) {
  // Fallback to nativeEvent.srcElement for IE9
  // https://github.com/facebook/react/issues/12506
  var target = nativeEvent.target || nativeEvent.srcElement || window; // Normalize SVG <use> element events #4963

  if (target.correspondingUseElement) {
    target = target.correspondingUseElement;
  } // Safari may fire events on text nodes (Node.TEXT_NODE is 3).
  // @see http://www.quirksmode.org/js/events_properties.html


  return target.nodeType === TEXT_NODE ? target.parentNode : target;
}

function getParent(inst) {
  do {
    inst = inst.return; // TODO: If this is a HostRoot we might want to bail out.
    // That is depending on if we want nested subtrees (layers) to bubble
    // events to their parent. We could also go through parentNode on the
    // host node but that wouldn't work for React Native and doesn't let us
    // do the portal feature.
  } while (inst && inst.tag !== HostComponent);

  if (inst) {
    return inst;
  }

  return null;
}
/**
 * Return the lowest common ancestor of A and B, or null if they are in
 * different trees.
 */


function getLowestCommonAncestor(instA, instB) {
  var depthA = 0;

  for (var tempA = instA; tempA; tempA = getParent(tempA)) {
    depthA++;
  }

  var depthB = 0;

  for (var tempB = instB; tempB; tempB = getParent(tempB)) {
    depthB++;
  } // If A is deeper, crawl up.


  while (depthA - depthB > 0) {
    instA = getParent(instA);
    depthA--;
  } // If B is deeper, crawl up.


  while (depthB - depthA > 0) {
    instB = getParent(instB);
    depthB--;
  } // Walk in lockstep until we find a match.


  var depth = depthA;

  while (depth--) {
    if (instA === instB || instA === instB.alternate) {
      return instA;
    }

    instA = getParent(instA);
    instB = getParent(instB);
  }

  return null;
}
/**
 * Return if A is an ancestor of B.
 */


/**
 * Return the parent instance of the passed-in instance.
 */


/**
 * Simulates the traversal of a two-phase, capture/bubble event dispatch.
 */

function traverseTwoPhase(inst, fn, arg) {
  var path = [];

  while (inst) {
    path.push(inst);
    inst = getParent(inst);
  }

  var i;

  for (i = path.length; i-- > 0;) {
    fn(path[i], 'captured', arg);
  }

  for (i = 0; i < path.length; i++) {
    fn(path[i], 'bubbled', arg);
  }
}
/**
 * Traverses the ID hierarchy and invokes the supplied `cb` on any IDs that
 * should would receive a `mouseEnter` or `mouseLeave` event.
 *
 * Does not invoke the callback on the nearest common ancestor because nothing
 * "entered" or "left" that element.
 */

function traverseEnterLeave(from, to, fn, argFrom, argTo) {
  var common = from && to ? getLowestCommonAncestor(from, to) : null;
  var pathFrom = [];

  while (true) {
    if (!from) {
      break;
    }

    if (from === common) {
      break;
    }

    var alternate = from.alternate;

    if (alternate !== null && alternate === common) {
      break;
    }

    pathFrom.push(from);
    from = getParent(from);
  }

  var pathTo = [];

  while (true) {
    if (!to) {
      break;
    }

    if (to === common) {
      break;
    }

    var _alternate = to.alternate;

    if (_alternate !== null && _alternate === common) {
      break;
    }

    pathTo.push(to);
    to = getParent(to);
  }

  for (var i = 0; i < pathFrom.length; i++) {
    fn(pathFrom[i], 'bubbled', argFrom);
  }

  for (var _i = pathTo.length; _i-- > 0;) {
    fn(pathTo[_i], 'captured', argTo);
  }
}

/**
 * Some event types have a notion of different registration names for different
 * "phases" of propagation. This finds listeners by a given phase.
 */
function listenerAtPhase(inst, event, propagationPhase) {
  var registrationName = event.dispatchConfig.phasedRegistrationNames[propagationPhase];
  return getListener(inst, registrationName);
}
/**
 * A small set of propagation patterns, each of which will accept a small amount
 * of information, and generate a set of "dispatch ready event objects" - which
 * are sets of events that have already been annotated with a set of dispatched
 * listener functions/ids. The API is designed this way to discourage these
 * propagation strategies from actually executing the dispatches, since we
 * always want to collect the entire set of dispatches before executing even a
 * single one.
 */

/**
 * Tags a `SyntheticEvent` with dispatched listeners. Creating this function
 * here, allows us to not have to bind or create functions for each event.
 * Mutating the event's members allows us to not have to create a wrapping
 * "dispatch" object that pairs the event with the listener.
 */


function accumulateDirectionalDispatches(inst, phase, event) {
  {
    !inst ? warningWithoutStack$1(false, 'Dispatching inst must not be null') : void 0;
  }

  var listener = listenerAtPhase(inst, event, phase);

  if (listener) {
    event._dispatchListeners = accumulateInto(event._dispatchListeners, listener);
    event._dispatchInstances = accumulateInto(event._dispatchInstances, inst);
  }
}
/**
 * Collect dispatches (must be entirely collected before dispatching - see unit
 * tests). Lazily allocate the array to conserve memory.  We must loop through
 * each event and perform the traversal for each one. We cannot perform a
 * single traversal for the entire collection of events because each event may
 * have a different target.
 */


function accumulateTwoPhaseDispatchesSingle(event) {
  if (event && event.dispatchConfig.phasedRegistrationNames) {
    traverseTwoPhase(event._targetInst, accumulateDirectionalDispatches, event);
  }
}
/**
 * Accumulates without regard to direction, does not look for phased
 * registration names. Same as `accumulateDirectDispatchesSingle` but without
 * requiring that the `dispatchMarker` be the same as the dispatched ID.
 */


function accumulateDispatches(inst, ignoredDirection, event) {
  if (inst && event && event.dispatchConfig.registrationName) {
    var registrationName = event.dispatchConfig.registrationName;
    var listener = getListener(inst, registrationName);

    if (listener) {
      event._dispatchListeners = accumulateInto(event._dispatchListeners, listener);
      event._dispatchInstances = accumulateInto(event._dispatchInstances, inst);
    }
  }
}
/**
 * Accumulates dispatches on an `SyntheticEvent`, but only for the
 * `dispatchMarker`.
 * @param {SyntheticEvent} event
 */


function accumulateDirectDispatchesSingle(event) {
  if (event && event.dispatchConfig.registrationName) {
    accumulateDispatches(event._targetInst, null, event);
  }
}

function accumulateTwoPhaseDispatches(events) {
  forEachAccumulated(events, accumulateTwoPhaseDispatchesSingle);
}

function accumulateEnterLeaveDispatches(leave, enter, from, to) {
  traverseEnterLeave(from, to, accumulateDispatches, leave, enter);
}
function accumulateDirectDispatches(events) {
  forEachAccumulated(events, accumulateDirectDispatchesSingle);
}

/* eslint valid-typeof: 0 */
var EVENT_POOL_SIZE = 10;
/**
 * @interface Event
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */

var EventInterface = {
  type: null,
  target: null,
  // currentTarget is set when dispatching; no use in copying it here
  currentTarget: function () {
    return null;
  },
  eventPhase: null,
  bubbles: null,
  cancelable: null,
  timeStamp: function (event) {
    return event.timeStamp || Date.now();
  },
  defaultPrevented: null,
  isTrusted: null
};

function functionThatReturnsTrue() {
  return true;
}

function functionThatReturnsFalse() {
  return false;
}
/**
 * Synthetic events are dispatched by event plugins, typically in response to a
 * top-level event delegation handler.
 *
 * These systems should generally use pooling to reduce the frequency of garbage
 * collection. The system should check `isPersistent` to determine whether the
 * event should be released into the pool after being dispatched. Users that
 * need a persisted event should invoke `persist`.
 *
 * Synthetic events (and subclasses) implement the DOM Level 3 Events API by
 * normalizing browser quirks. Subclasses do not necessarily have to implement a
 * DOM interface; custom application-specific events can also subclass this.
 *
 * @param {object} dispatchConfig Configuration used to dispatch this event.
 * @param {*} targetInst Marker identifying the event target.
 * @param {object} nativeEvent Native browser event.
 * @param {DOMEventTarget} nativeEventTarget Target node.
 */


function SyntheticEvent(dispatchConfig, targetInst, nativeEvent, nativeEventTarget) {
  {
    // these have a getter/setter for warnings
    delete this.nativeEvent;
    delete this.preventDefault;
    delete this.stopPropagation;
    delete this.isDefaultPrevented;
    delete this.isPropagationStopped;
  }

  this.dispatchConfig = dispatchConfig;
  this._targetInst = targetInst;
  this.nativeEvent = nativeEvent;
  var Interface = this.constructor.Interface;

  for (var propName in Interface) {
    if (!Interface.hasOwnProperty(propName)) {
      continue;
    }

    {
      delete this[propName]; // this has a getter/setter for warnings
    }

    var normalize = Interface[propName];

    if (normalize) {
      this[propName] = normalize(nativeEvent);
    } else {
      if (propName === 'target') {
        this.target = nativeEventTarget;
      } else {
        this[propName] = nativeEvent[propName];
      }
    }
  }

  var defaultPrevented = nativeEvent.defaultPrevented != null ? nativeEvent.defaultPrevented : nativeEvent.returnValue === false;

  if (defaultPrevented) {
    this.isDefaultPrevented = functionThatReturnsTrue;
  } else {
    this.isDefaultPrevented = functionThatReturnsFalse;
  }

  this.isPropagationStopped = functionThatReturnsFalse;
  return this;
}

_assign(SyntheticEvent.prototype, {
  preventDefault: function () {
    this.defaultPrevented = true;
    var event = this.nativeEvent;

    if (!event) {
      return;
    }

    if (event.preventDefault) {
      event.preventDefault();
    } else if (typeof event.returnValue !== 'unknown') {
      event.returnValue = false;
    }

    this.isDefaultPrevented = functionThatReturnsTrue;
  },
  stopPropagation: function () {
    var event = this.nativeEvent;

    if (!event) {
      return;
    }

    if (event.stopPropagation) {
      event.stopPropagation();
    } else if (typeof event.cancelBubble !== 'unknown') {
      // The ChangeEventPlugin registers a "propertychange" event for
      // IE. This event does not support bubbling or cancelling, and
      // any references to cancelBubble throw "Member not found".  A
      // typeof check of "unknown" circumvents this issue (and is also
      // IE specific).
      event.cancelBubble = true;
    }

    this.isPropagationStopped = functionThatReturnsTrue;
  },

  /**
   * We release all dispatched `SyntheticEvent`s after each event loop, adding
   * them back into the pool. This allows a way to hold onto a reference that
   * won't be added back into the pool.
   */
  persist: function () {
    this.isPersistent = functionThatReturnsTrue;
  },

  /**
   * Checks if this event should be released back into the pool.
   *
   * @return {boolean} True if this should not be released, false otherwise.
   */
  isPersistent: functionThatReturnsFalse,

  /**
   * `PooledClass` looks for `destructor` on each instance it releases.
   */
  destructor: function () {
    var Interface = this.constructor.Interface;

    for (var propName in Interface) {
      {
        Object.defineProperty(this, propName, getPooledWarningPropertyDefinition(propName, Interface[propName]));
      }
    }

    this.dispatchConfig = null;
    this._targetInst = null;
    this.nativeEvent = null;
    this.isDefaultPrevented = functionThatReturnsFalse;
    this.isPropagationStopped = functionThatReturnsFalse;
    this._dispatchListeners = null;
    this._dispatchInstances = null;

    {
      Object.defineProperty(this, 'nativeEvent', getPooledWarningPropertyDefinition('nativeEvent', null));
      Object.defineProperty(this, 'isDefaultPrevented', getPooledWarningPropertyDefinition('isDefaultPrevented', functionThatReturnsFalse));
      Object.defineProperty(this, 'isPropagationStopped', getPooledWarningPropertyDefinition('isPropagationStopped', functionThatReturnsFalse));
      Object.defineProperty(this, 'preventDefault', getPooledWarningPropertyDefinition('preventDefault', function () {}));
      Object.defineProperty(this, 'stopPropagation', getPooledWarningPropertyDefinition('stopPropagation', function () {}));
    }
  }
});

SyntheticEvent.Interface = EventInterface;
/**
 * Helper to reduce boilerplate when creating subclasses.
 */

SyntheticEvent.extend = function (Interface) {
  var Super = this;

  var E = function () {};

  E.prototype = Super.prototype;
  var prototype = new E();

  function Class() {
    return Super.apply(this, arguments);
  }

  _assign(prototype, Class.prototype);

  Class.prototype = prototype;
  Class.prototype.constructor = Class;
  Class.Interface = _assign({}, Super.Interface, Interface);
  Class.extend = Super.extend;
  addEventPoolingTo(Class);
  return Class;
};

addEventPoolingTo(SyntheticEvent);
/**
 * Helper to nullify syntheticEvent instance properties when destructing
 *
 * @param {String} propName
 * @param {?object} getVal
 * @return {object} defineProperty object
 */

function getPooledWarningPropertyDefinition(propName, getVal) {
  var isFunction = typeof getVal === 'function';
  return {
    configurable: true,
    set: set,
    get: get
  };

  function set(val) {
    var action = isFunction ? 'setting the method' : 'setting the property';
    warn(action, 'This is effectively a no-op');
    return val;
  }

  function get() {
    var action = isFunction ? 'accessing the method' : 'accessing the property';
    var result = isFunction ? 'This is a no-op function' : 'This is set to null';
    warn(action, result);
    return getVal;
  }

  function warn(action, result) {
    var warningCondition = false;
    !warningCondition ? warningWithoutStack$1(false, "This synthetic event is reused for performance reasons. If you're seeing this, " + "you're %s `%s` on a released/nullified synthetic event. %s. " + 'If you must keep the original synthetic event around, use event.persist(). ' + 'See https://fb.me/react-event-pooling for more information.', action, propName, result) : void 0;
  }
}

function getPooledEvent(dispatchConfig, targetInst, nativeEvent, nativeInst) {
  var EventConstructor = this;

  if (EventConstructor.eventPool.length) {
    var instance = EventConstructor.eventPool.pop();
    EventConstructor.call(instance, dispatchConfig, targetInst, nativeEvent, nativeInst);
    return instance;
  }

  return new EventConstructor(dispatchConfig, targetInst, nativeEvent, nativeInst);
}

function releasePooledEvent(event) {
  var EventConstructor = this;

  if (!(event instanceof EventConstructor)) {
    {
      throw Error("Trying to release an event instance into a pool of a different type.");
    }
  }

  event.destructor();

  if (EventConstructor.eventPool.length < EVENT_POOL_SIZE) {
    EventConstructor.eventPool.push(event);
  }
}

function addEventPoolingTo(EventConstructor) {
  EventConstructor.eventPool = [];
  EventConstructor.getPooled = getPooledEvent;
  EventConstructor.release = releasePooledEvent;
}

/**
 * @interface Event
 * @see http://www.w3.org/TR/css3-animations/#AnimationEvent-interface
 * @see https://developer.mozilla.org/en-US/docs/Web/API/AnimationEvent
 */

var SyntheticAnimationEvent = SyntheticEvent.extend({
  animationName: null,
  elapsedTime: null,
  pseudoElement: null
});

/**
 * @interface Event
 * @see http://www.w3.org/TR/clipboard-apis/
 */

var SyntheticClipboardEvent = SyntheticEvent.extend({
  clipboardData: function (event) {
    return 'clipboardData' in event ? event.clipboardData : window.clipboardData;
  }
});

var SyntheticUIEvent = SyntheticEvent.extend({
  view: null,
  detail: null
});

/**
 * @interface FocusEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */

var SyntheticFocusEvent = SyntheticUIEvent.extend({
  relatedTarget: null
});

/**
 * `charCode` represents the actual "character code" and is safe to use with
 * `String.fromCharCode`. As such, only keys that correspond to printable
 * characters produce a valid `charCode`, the only exception to this is Enter.
 * The Tab-key is considered non-printable and does not have a `charCode`,
 * presumably because it does not produce a tab-character in browsers.
 *
 * @param {object} nativeEvent Native browser event.
 * @return {number} Normalized `charCode` property.
 */
function getEventCharCode(nativeEvent) {
  var charCode;
  var keyCode = nativeEvent.keyCode;

  if ('charCode' in nativeEvent) {
    charCode = nativeEvent.charCode; // FF does not set `charCode` for the Enter-key, check against `keyCode`.

    if (charCode === 0 && keyCode === 13) {
      charCode = 13;
    }
  } else {
    // IE8 does not implement `charCode`, but `keyCode` has the correct value.
    charCode = keyCode;
  } // IE and Edge (on Windows) and Chrome / Safari (on Windows and Linux)
  // report Enter as charCode 10 when ctrl is pressed.


  if (charCode === 10) {
    charCode = 13;
  } // Some non-printable keys are reported in `charCode`/`keyCode`, discard them.
  // Must not discard the (non-)printable Enter-key.


  if (charCode >= 32 || charCode === 13) {
    return charCode;
  }

  return 0;
}

/**
 * Normalization of deprecated HTML5 `key` values
 * @see https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent#Key_names
 */

var normalizeKey = {
  Esc: 'Escape',
  Spacebar: ' ',
  Left: 'ArrowLeft',
  Up: 'ArrowUp',
  Right: 'ArrowRight',
  Down: 'ArrowDown',
  Del: 'Delete',
  Win: 'OS',
  Menu: 'ContextMenu',
  Apps: 'ContextMenu',
  Scroll: 'ScrollLock',
  MozPrintableKey: 'Unidentified'
};
/**
 * Translation from legacy `keyCode` to HTML5 `key`
 * Only special keys supported, all others depend on keyboard layout or browser
 * @see https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent#Key_names
 */

var translateToKey = {
  '8': 'Backspace',
  '9': 'Tab',
  '12': 'Clear',
  '13': 'Enter',
  '16': 'Shift',
  '17': 'Control',
  '18': 'Alt',
  '19': 'Pause',
  '20': 'CapsLock',
  '27': 'Escape',
  '32': ' ',
  '33': 'PageUp',
  '34': 'PageDown',
  '35': 'End',
  '36': 'Home',
  '37': 'ArrowLeft',
  '38': 'ArrowUp',
  '39': 'ArrowRight',
  '40': 'ArrowDown',
  '45': 'Insert',
  '46': 'Delete',
  '112': 'F1',
  '113': 'F2',
  '114': 'F3',
  '115': 'F4',
  '116': 'F5',
  '117': 'F6',
  '118': 'F7',
  '119': 'F8',
  '120': 'F9',
  '121': 'F10',
  '122': 'F11',
  '123': 'F12',
  '144': 'NumLock',
  '145': 'ScrollLock',
  '224': 'Meta'
};
/**
 * @param {object} nativeEvent Native browser event.
 * @return {string} Normalized `key` property.
 */

function getEventKey(nativeEvent) {
  if (nativeEvent.key) {
    // Normalize inconsistent values reported by browsers due to
    // implementations of a working draft specification.
    // FireFox implements `key` but returns `MozPrintableKey` for all
    // printable characters (normalized to `Unidentified`), ignore it.
    var key = normalizeKey[nativeEvent.key] || nativeEvent.key;

    if (key !== 'Unidentified') {
      return key;
    }
  } // Browser does not implement `key`, polyfill as much of it as we can.


  if (nativeEvent.type === 'keypress') {
    var charCode = getEventCharCode(nativeEvent); // The enter-key is technically both printable and non-printable and can
    // thus be captured by `keypress`, no other non-printable key should.

    return charCode === 13 ? 'Enter' : String.fromCharCode(charCode);
  }

  if (nativeEvent.type === 'keydown' || nativeEvent.type === 'keyup') {
    // While user keyboard layout determines the actual meaning of each
    // `keyCode` value, almost all function keys have a universal value.
    return translateToKey[nativeEvent.keyCode] || 'Unidentified';
  }

  return '';
}

/**
 * Translation from modifier key to the associated property in the event.
 * @see http://www.w3.org/TR/DOM-Level-3-Events/#keys-Modifiers
 */
var modifierKeyToProp = {
  Alt: 'altKey',
  Control: 'ctrlKey',
  Meta: 'metaKey',
  Shift: 'shiftKey'
}; // Older browsers (Safari <= 10, iOS Safari <= 10.2) do not support
// getModifierState. If getModifierState is not supported, we map it to a set of
// modifier keys exposed by the event. In this case, Lock-keys are not supported.

function modifierStateGetter(keyArg) {
  var syntheticEvent = this;
  var nativeEvent = syntheticEvent.nativeEvent;

  if (nativeEvent.getModifierState) {
    return nativeEvent.getModifierState(keyArg);
  }

  var keyProp = modifierKeyToProp[keyArg];
  return keyProp ? !!nativeEvent[keyProp] : false;
}

function getEventModifierState(nativeEvent) {
  return modifierStateGetter;
}

/**
 * @interface KeyboardEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */

var SyntheticKeyboardEvent = SyntheticUIEvent.extend({
  key: getEventKey,
  location: null,
  ctrlKey: null,
  shiftKey: null,
  altKey: null,
  metaKey: null,
  repeat: null,
  locale: null,
  getModifierState: getEventModifierState,
  // Legacy Interface
  charCode: function (event) {
    // `charCode` is the result of a KeyPress event and represents the value of
    // the actual printable character.
    // KeyPress is deprecated, but its replacement is not yet final and not
    // implemented in any major browser. Only KeyPress has charCode.
    if (event.type === 'keypress') {
      return getEventCharCode(event);
    }

    return 0;
  },
  keyCode: function (event) {
    // `keyCode` is the result of a KeyDown/Up event and represents the value of
    // physical keyboard key.
    // The actual meaning of the value depends on the users' keyboard layout
    // which cannot be detected. Assuming that it is a US keyboard layout
    // provides a surprisingly accurate mapping for US and European users.
    // Due to this, it is left to the user to implement at this time.
    if (event.type === 'keydown' || event.type === 'keyup') {
      return event.keyCode;
    }

    return 0;
  },
  which: function (event) {
    // `which` is an alias for either `keyCode` or `charCode` depending on the
    // type of the event.
    if (event.type === 'keypress') {
      return getEventCharCode(event);
    }

    if (event.type === 'keydown' || event.type === 'keyup') {
      return event.keyCode;
    }

    return 0;
  }
});

var previousScreenX = 0;
var previousScreenY = 0; // Use flags to signal movementX/Y has already been set

var isMovementXSet = false;
var isMovementYSet = false;
/**
 * @interface MouseEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */

var SyntheticMouseEvent = SyntheticUIEvent.extend({
  screenX: null,
  screenY: null,
  clientX: null,
  clientY: null,
  pageX: null,
  pageY: null,
  ctrlKey: null,
  shiftKey: null,
  altKey: null,
  metaKey: null,
  getModifierState: getEventModifierState,
  button: null,
  buttons: null,
  relatedTarget: function (event) {
    return event.relatedTarget || (event.fromElement === event.srcElement ? event.toElement : event.fromElement);
  },
  movementX: function (event) {
    if ('movementX' in event) {
      return event.movementX;
    }

    var screenX = previousScreenX;
    previousScreenX = event.screenX;

    if (!isMovementXSet) {
      isMovementXSet = true;
      return 0;
    }

    return event.type === 'mousemove' ? event.screenX - screenX : 0;
  },
  movementY: function (event) {
    if ('movementY' in event) {
      return event.movementY;
    }

    var screenY = previousScreenY;
    previousScreenY = event.screenY;

    if (!isMovementYSet) {
      isMovementYSet = true;
      return 0;
    }

    return event.type === 'mousemove' ? event.screenY - screenY : 0;
  }
});

/**
 * @interface PointerEvent
 * @see http://www.w3.org/TR/pointerevents/
 */

var SyntheticPointerEvent = SyntheticMouseEvent.extend({
  pointerId: null,
  width: null,
  height: null,
  pressure: null,
  tangentialPressure: null,
  tiltX: null,
  tiltY: null,
  twist: null,
  pointerType: null,
  isPrimary: null
});

/**
 * @interface DragEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */

var SyntheticDragEvent = SyntheticMouseEvent.extend({
  dataTransfer: null
});

/**
 * @interface TouchEvent
 * @see http://www.w3.org/TR/touch-events/
 */

var SyntheticTouchEvent = SyntheticUIEvent.extend({
  touches: null,
  targetTouches: null,
  changedTouches: null,
  altKey: null,
  metaKey: null,
  ctrlKey: null,
  shiftKey: null,
  getModifierState: getEventModifierState
});

/**
 * @interface Event
 * @see http://www.w3.org/TR/2009/WD-css3-transitions-20090320/#transition-events-
 * @see https://developer.mozilla.org/en-US/docs/Web/API/TransitionEvent
 */

var SyntheticTransitionEvent = SyntheticEvent.extend({
  propertyName: null,
  elapsedTime: null,
  pseudoElement: null
});

/**
 * @interface WheelEvent
 * @see http://www.w3.org/TR/DOM-Level-3-Events/
 */

var SyntheticWheelEvent = SyntheticMouseEvent.extend({
  deltaX: function (event) {
    return 'deltaX' in event ? event.deltaX : // Fallback to `wheelDeltaX` for Webkit and normalize (right is positive).
    'wheelDeltaX' in event ? -event.wheelDeltaX : 0;
  },
  deltaY: function (event) {
    return 'deltaY' in event ? event.deltaY : // Fallback to `wheelDeltaY` for Webkit and normalize (down is positive).
    'wheelDeltaY' in event ? -event.wheelDeltaY : // Fallback to `wheelDelta` for IE<9 and normalize (down is positive).
    'wheelDelta' in event ? -event.wheelDelta : 0;
  },
  deltaZ: null,
  // Browsers without "deltaMode" is reporting in raw wheel delta where one
  // notch on the scroll is always +/- 120, roughly equivalent to pixels.
  // A good approximation of DOM_DELTA_LINE (1) is 5% of viewport size or
  // ~40 pixels, for DOM_DELTA_SCREEN (2) it is 87.5% of viewport size.
  deltaMode: null
});

/**
 * Turns
 * ['abort', ...]
 * into
 * eventTypes = {
 *   'abort': {
 *     phasedRegistrationNames: {
 *       bubbled: 'onAbort',
 *       captured: 'onAbortCapture',
 *     },
 *     dependencies: [TOP_ABORT],
 *   },
 *   ...
 * };
 * topLevelEventsToDispatchConfig = new Map([
 *   [TOP_ABORT, { sameConfig }],
 * ]);
 */

var eventTuples = [// Discrete events
[TOP_BLUR, 'blur', DiscreteEvent], [TOP_CANCEL, 'cancel', DiscreteEvent], [TOP_CLICK, 'click', DiscreteEvent], [TOP_CLOSE, 'close', DiscreteEvent], [TOP_CONTEXT_MENU, 'contextMenu', DiscreteEvent], [TOP_COPY, 'copy', DiscreteEvent], [TOP_CUT, 'cut', DiscreteEvent], [TOP_AUX_CLICK, 'auxClick', DiscreteEvent], [TOP_DOUBLE_CLICK, 'doubleClick', DiscreteEvent], [TOP_DRAG_END, 'dragEnd', DiscreteEvent], [TOP_DRAG_START, 'dragStart', DiscreteEvent], [TOP_DROP, 'drop', DiscreteEvent], [TOP_FOCUS, 'focus', DiscreteEvent], [TOP_INPUT, 'input', DiscreteEvent], [TOP_INVALID, 'invalid', DiscreteEvent], [TOP_KEY_DOWN, 'keyDown', DiscreteEvent], [TOP_KEY_PRESS, 'keyPress', DiscreteEvent], [TOP_KEY_UP, 'keyUp', DiscreteEvent], [TOP_MOUSE_DOWN, 'mouseDown', DiscreteEvent], [TOP_MOUSE_UP, 'mouseUp', DiscreteEvent], [TOP_PASTE, 'paste', DiscreteEvent], [TOP_PAUSE, 'pause', DiscreteEvent], [TOP_PLAY, 'play', DiscreteEvent], [TOP_POINTER_CANCEL, 'pointerCancel', DiscreteEvent], [TOP_POINTER_DOWN, 'pointerDown', DiscreteEvent], [TOP_POINTER_UP, 'pointerUp', DiscreteEvent], [TOP_RATE_CHANGE, 'rateChange', DiscreteEvent], [TOP_RESET, 'reset', DiscreteEvent], [TOP_SEEKED, 'seeked', DiscreteEvent], [TOP_SUBMIT, 'submit', DiscreteEvent], [TOP_TOUCH_CANCEL, 'touchCancel', DiscreteEvent], [TOP_TOUCH_END, 'touchEnd', DiscreteEvent], [TOP_TOUCH_START, 'touchStart', DiscreteEvent], [TOP_VOLUME_CHANGE, 'volumeChange', DiscreteEvent], // User-blocking events
[TOP_DRAG, 'drag', UserBlockingEvent], [TOP_DRAG_ENTER, 'dragEnter', UserBlockingEvent], [TOP_DRAG_EXIT, 'dragExit', UserBlockingEvent], [TOP_DRAG_LEAVE, 'dragLeave', UserBlockingEvent], [TOP_DRAG_OVER, 'dragOver', UserBlockingEvent], [TOP_MOUSE_MOVE, 'mouseMove', UserBlockingEvent], [TOP_MOUSE_OUT, 'mouseOut', UserBlockingEvent], [TOP_MOUSE_OVER, 'mouseOver', UserBlockingEvent], [TOP_POINTER_MOVE, 'pointerMove', UserBlockingEvent], [TOP_POINTER_OUT, 'pointerOut', UserBlockingEvent], [TOP_POINTER_OVER, 'pointerOver', UserBlockingEvent], [TOP_SCROLL, 'scroll', UserBlockingEvent], [TOP_TOGGLE, 'toggle', UserBlockingEvent], [TOP_TOUCH_MOVE, 'touchMove', UserBlockingEvent], [TOP_WHEEL, 'wheel', UserBlockingEvent], // Continuous events
[TOP_ABORT, 'abort', ContinuousEvent], [TOP_ANIMATION_END, 'animationEnd', ContinuousEvent], [TOP_ANIMATION_ITERATION, 'animationIteration', ContinuousEvent], [TOP_ANIMATION_START, 'animationStart', ContinuousEvent], [TOP_CAN_PLAY, 'canPlay', ContinuousEvent], [TOP_CAN_PLAY_THROUGH, 'canPlayThrough', ContinuousEvent], [TOP_DURATION_CHANGE, 'durationChange', ContinuousEvent], [TOP_EMPTIED, 'emptied', ContinuousEvent], [TOP_ENCRYPTED, 'encrypted', ContinuousEvent], [TOP_ENDED, 'ended', ContinuousEvent], [TOP_ERROR, 'error', ContinuousEvent], [TOP_GOT_POINTER_CAPTURE, 'gotPointerCapture', ContinuousEvent], [TOP_LOAD, 'load', ContinuousEvent], [TOP_LOADED_DATA, 'loadedData', ContinuousEvent], [TOP_LOADED_METADATA, 'loadedMetadata', ContinuousEvent], [TOP_LOAD_START, 'loadStart', ContinuousEvent], [TOP_LOST_POINTER_CAPTURE, 'lostPointerCapture', ContinuousEvent], [TOP_PLAYING, 'playing', ContinuousEvent], [TOP_PROGRESS, 'progress', ContinuousEvent], [TOP_SEEKING, 'seeking', ContinuousEvent], [TOP_STALLED, 'stalled', ContinuousEvent], [TOP_SUSPEND, 'suspend', ContinuousEvent], [TOP_TIME_UPDATE, 'timeUpdate', ContinuousEvent], [TOP_TRANSITION_END, 'transitionEnd', ContinuousEvent], [TOP_WAITING, 'waiting', ContinuousEvent]];
var eventTypes = {};
var topLevelEventsToDispatchConfig = {};

for (var i = 0; i < eventTuples.length; i++) {
  var eventTuple = eventTuples[i];
  var topEvent = eventTuple[0];
  var event = eventTuple[1];
  var eventPriority = eventTuple[2];
  var capitalizedEvent = event[0].toUpperCase() + event.slice(1);
  var onEvent = 'on' + capitalizedEvent;
  var config = {
    phasedRegistrationNames: {
      bubbled: onEvent,
      captured: onEvent + 'Capture'
    },
    dependencies: [topEvent],
    eventPriority: eventPriority
  };
  eventTypes[event] = config;
  topLevelEventsToDispatchConfig[topEvent] = config;
} // Only used in DEV for exhaustiveness validation.


var knownHTMLTopLevelTypes = [TOP_ABORT, TOP_CANCEL, TOP_CAN_PLAY, TOP_CAN_PLAY_THROUGH, TOP_CLOSE, TOP_DURATION_CHANGE, TOP_EMPTIED, TOP_ENCRYPTED, TOP_ENDED, TOP_ERROR, TOP_INPUT, TOP_INVALID, TOP_LOAD, TOP_LOADED_DATA, TOP_LOADED_METADATA, TOP_LOAD_START, TOP_PAUSE, TOP_PLAY, TOP_PLAYING, TOP_PROGRESS, TOP_RATE_CHANGE, TOP_RESET, TOP_SEEKED, TOP_SEEKING, TOP_STALLED, TOP_SUBMIT, TOP_SUSPEND, TOP_TIME_UPDATE, TOP_TOGGLE, TOP_VOLUME_CHANGE, TOP_WAITING];
var SimpleEventPlugin = {
  eventTypes: eventTypes,
  getEventPriority: function (topLevelType) {
    var config = topLevelEventsToDispatchConfig[topLevelType];
    return config !== undefined ? config.eventPriority : ContinuousEvent;
  },
  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags) {
    var dispatchConfig = topLevelEventsToDispatchConfig[topLevelType];

    if (!dispatchConfig) {
      return null;
    }

    var EventConstructor;

    switch (topLevelType) {
      case TOP_KEY_PRESS:
        // Firefox creates a keypress event for function keys too. This removes
        // the unwanted keypress events. Enter is however both printable and
        // non-printable. One would expect Tab to be as well (but it isn't).
        if (getEventCharCode(nativeEvent) === 0) {
          return null;
        }

      /* falls through */

      case TOP_KEY_DOWN:
      case TOP_KEY_UP:
        EventConstructor = SyntheticKeyboardEvent;
        break;

      case TOP_BLUR:
      case TOP_FOCUS:
        EventConstructor = SyntheticFocusEvent;
        break;

      case TOP_CLICK:
        // Firefox creates a click event on right mouse clicks. This removes the
        // unwanted click events.
        if (nativeEvent.button === 2) {
          return null;
        }

      /* falls through */

      case TOP_AUX_CLICK:
      case TOP_DOUBLE_CLICK:
      case TOP_MOUSE_DOWN:
      case TOP_MOUSE_MOVE:
      case TOP_MOUSE_UP: // TODO: Disabled elements should not respond to mouse events

      /* falls through */

      case TOP_MOUSE_OUT:
      case TOP_MOUSE_OVER:
      case TOP_CONTEXT_MENU:
        EventConstructor = SyntheticMouseEvent;
        break;

      case TOP_DRAG:
      case TOP_DRAG_END:
      case TOP_DRAG_ENTER:
      case TOP_DRAG_EXIT:
      case TOP_DRAG_LEAVE:
      case TOP_DRAG_OVER:
      case TOP_DRAG_START:
      case TOP_DROP:
        EventConstructor = SyntheticDragEvent;
        break;

      case TOP_TOUCH_CANCEL:
      case TOP_TOUCH_END:
      case TOP_TOUCH_MOVE:
      case TOP_TOUCH_START:
        EventConstructor = SyntheticTouchEvent;
        break;

      case TOP_ANIMATION_END:
      case TOP_ANIMATION_ITERATION:
      case TOP_ANIMATION_START:
        EventConstructor = SyntheticAnimationEvent;
        break;

      case TOP_TRANSITION_END:
        EventConstructor = SyntheticTransitionEvent;
        break;

      case TOP_SCROLL:
        EventConstructor = SyntheticUIEvent;
        break;

      case TOP_WHEEL:
        EventConstructor = SyntheticWheelEvent;
        break;

      case TOP_COPY:
      case TOP_CUT:
      case TOP_PASTE:
        EventConstructor = SyntheticClipboardEvent;
        break;

      case TOP_GOT_POINTER_CAPTURE:
      case TOP_LOST_POINTER_CAPTURE:
      case TOP_POINTER_CANCEL:
      case TOP_POINTER_DOWN:
      case TOP_POINTER_MOVE:
      case TOP_POINTER_OUT:
      case TOP_POINTER_OVER:
      case TOP_POINTER_UP:
        EventConstructor = SyntheticPointerEvent;
        break;

      default:
        {
          if (knownHTMLTopLevelTypes.indexOf(topLevelType) === -1) {
            warningWithoutStack$1(false, 'SimpleEventPlugin: Unhandled event type, `%s`. This warning ' + 'is likely caused by a bug in React. Please file an issue.', topLevelType);
          }
        } // HTML Events
        // @see http://www.w3.org/TR/html5/index.html#events-0


        EventConstructor = SyntheticEvent;
        break;
    }

    var event = EventConstructor.getPooled(dispatchConfig, targetInst, nativeEvent, nativeEventTarget);
    accumulateTwoPhaseDispatches(event);
    return event;
  }
};

var passiveBrowserEventsSupported = false; // Check if browser support events with passive listeners
// https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Safely_detecting_option_support

if (enableFlareAPI && canUseDOM) {
  try {
    var options = {}; // $FlowFixMe: Ignore Flow complaining about needing a value

    Object.defineProperty(options, 'passive', {
      get: function () {
        passiveBrowserEventsSupported = true;
      }
    });
    window.addEventListener('test', options, options);
    window.removeEventListener('test', options, options);
  } catch (e) {
    passiveBrowserEventsSupported = false;
  }
}

// Intentionally not named imports because Rollup would use dynamic dispatch for
// CommonJS interop named imports.
var UserBlockingPriority$1 = Scheduler.unstable_UserBlockingPriority;
var runWithPriority$1 = Scheduler.unstable_runWithPriority;
var getEventPriority = SimpleEventPlugin.getEventPriority;
var CALLBACK_BOOKKEEPING_POOL_SIZE = 10;
var callbackBookkeepingPool = [];

/**
 * Find the deepest React component completely containing the root of the
 * passed-in instance (for use when entire React trees are nested within each
 * other). If React trees are not nested, returns null.
 */
function findRootContainerNode(inst) {
  if (inst.tag === HostRoot) {
    return inst.stateNode.containerInfo;
  } // TODO: It may be a good idea to cache this to prevent unnecessary DOM
  // traversal, but caching is difficult to do correctly without using a
  // mutation observer to listen for all DOM changes.


  while (inst.return) {
    inst = inst.return;
  }

  if (inst.tag !== HostRoot) {
    // This can happen if we're in a detached tree.
    return null;
  }

  return inst.stateNode.containerInfo;
} // Used to store ancestor hierarchy in top level callback


function getTopLevelCallbackBookKeeping(topLevelType, nativeEvent, targetInst, eventSystemFlags) {
  if (callbackBookkeepingPool.length) {
    var instance = callbackBookkeepingPool.pop();
    instance.topLevelType = topLevelType;
    instance.eventSystemFlags = eventSystemFlags;
    instance.nativeEvent = nativeEvent;
    instance.targetInst = targetInst;
    return instance;
  }

  return {
    topLevelType: topLevelType,
    eventSystemFlags: eventSystemFlags,
    nativeEvent: nativeEvent,
    targetInst: targetInst,
    ancestors: []
  };
}

function releaseTopLevelCallbackBookKeeping(instance) {
  instance.topLevelType = null;
  instance.nativeEvent = null;
  instance.targetInst = null;
  instance.ancestors.length = 0;

  if (callbackBookkeepingPool.length < CALLBACK_BOOKKEEPING_POOL_SIZE) {
    callbackBookkeepingPool.push(instance);
  }
}

function handleTopLevel(bookKeeping) {
  var targetInst = bookKeeping.targetInst; // Loop through the hierarchy, in case there's any nested components.
  // It's important that we build the array of ancestors before calling any
  // event handlers, because event handlers can modify the DOM, leading to
  // inconsistencies with ReactMount's node cache. See #1105.

  var ancestor = targetInst;

  do {
    if (!ancestor) {
      var ancestors = bookKeeping.ancestors;
      ancestors.push(ancestor);
      break;
    }

    var root = findRootContainerNode(ancestor);

    if (!root) {
      break;
    }

    var tag = ancestor.tag;

    if (tag === HostComponent || tag === HostText) {
      bookKeeping.ancestors.push(ancestor);
    }

    ancestor = getClosestInstanceFromNode(root);
  } while (ancestor);

  for (var i = 0; i < bookKeeping.ancestors.length; i++) {
    targetInst = bookKeeping.ancestors[i];
    var eventTarget = getEventTarget(bookKeeping.nativeEvent);
    var topLevelType = bookKeeping.topLevelType;
    var nativeEvent = bookKeeping.nativeEvent;
    runExtractedPluginEventsInBatch(topLevelType, targetInst, nativeEvent, eventTarget, bookKeeping.eventSystemFlags);
  }
} // TODO: can we stop exporting these?


var _enabled = true;
function setEnabled(enabled) {
  _enabled = !!enabled;
}
function isEnabled() {
  return _enabled;
}
function trapBubbledEvent(topLevelType, element) {
  trapEventForPluginEventSystem(element, topLevelType, false);
}
function trapCapturedEvent(topLevelType, element) {
  trapEventForPluginEventSystem(element, topLevelType, true);
}
function trapEventForResponderEventSystem(element, topLevelType, passive) {
  if (enableFlareAPI) {
    var rawEventName = getRawEventName(topLevelType);
    var eventFlags = RESPONDER_EVENT_SYSTEM; // If passive option is not supported, then the event will be
    // active and not passive, but we flag it as using not being
    // supported too. This way the responder event plugins know,
    // and can provide polyfills if needed.

    if (passive) {
      if (passiveBrowserEventsSupported) {
        eventFlags |= IS_PASSIVE;
      } else {
        eventFlags |= IS_ACTIVE;
        eventFlags |= PASSIVE_NOT_SUPPORTED;
        passive = false;
      }
    } else {
      eventFlags |= IS_ACTIVE;
    } // Check if interactive and wrap in discreteUpdates


    var listener = dispatchEvent.bind(null, topLevelType, eventFlags);

    if (passiveBrowserEventsSupported) {
      addEventCaptureListenerWithPassiveFlag(element, rawEventName, listener, passive);
    } else {
      addEventCaptureListener(element, rawEventName, listener);
    }
  }
}

function trapEventForPluginEventSystem(element, topLevelType, capture) {
  var listener;

  switch (getEventPriority(topLevelType)) {
    case DiscreteEvent:
      listener = dispatchDiscreteEvent.bind(null, topLevelType, PLUGIN_EVENT_SYSTEM);
      break;

    case UserBlockingEvent:
      listener = dispatchUserBlockingUpdate.bind(null, topLevelType, PLUGIN_EVENT_SYSTEM);
      break;

    case ContinuousEvent:
    default:
      listener = dispatchEvent.bind(null, topLevelType, PLUGIN_EVENT_SYSTEM);
      break;
  }

  var rawEventName = getRawEventName(topLevelType);

  if (capture) {
    addEventCaptureListener(element, rawEventName, listener);
  } else {
    addEventBubbleListener(element, rawEventName, listener);
  }
}

function dispatchDiscreteEvent(topLevelType, eventSystemFlags, nativeEvent) {
  flushDiscreteUpdatesIfNeeded(nativeEvent.timeStamp);
  discreteUpdates(dispatchEvent, topLevelType, eventSystemFlags, nativeEvent);
}

function dispatchUserBlockingUpdate(topLevelType, eventSystemFlags, nativeEvent) {
  runWithPriority$1(UserBlockingPriority$1, dispatchEvent.bind(null, topLevelType, eventSystemFlags, nativeEvent));
}

function dispatchEventForPluginEventSystem(topLevelType, eventSystemFlags, nativeEvent, targetInst) {
  var bookKeeping = getTopLevelCallbackBookKeeping(topLevelType, nativeEvent, targetInst, eventSystemFlags);

  try {
    // Event queue being processed in the same cycle allows
    // `preventDefault`.
    batchedEventUpdates(handleTopLevel, bookKeeping);
  } finally {
    releaseTopLevelCallbackBookKeeping(bookKeeping);
  }
}

function dispatchEvent(topLevelType, eventSystemFlags, nativeEvent) {
  if (!_enabled) {
    return;
  }

  if (hasQueuedDiscreteEvents() && isReplayableDiscreteEvent(topLevelType)) {
    // If we already have a queue of discrete events, and this is another discrete
    // event, then we can't dispatch it regardless of its target, since they
    // need to dispatch in order.
    queueDiscreteEvent(null, // Flags that we're not actually blocked on anything as far as we know.
    topLevelType, eventSystemFlags, nativeEvent);
    return;
  }

  var blockedOn = attemptToDispatchEvent(topLevelType, eventSystemFlags, nativeEvent);

  if (blockedOn === null) {
    // We successfully dispatched this event.
    clearIfContinuousEvent(topLevelType, nativeEvent);
    return;
  }

  if (isReplayableDiscreteEvent(topLevelType)) {
    // This this to be replayed later once the target is available.
    queueDiscreteEvent(blockedOn, topLevelType, eventSystemFlags, nativeEvent);
    return;
  }

  if (queueIfContinuousEvent(blockedOn, topLevelType, eventSystemFlags, nativeEvent)) {
    return;
  } // We need to clear only if we didn't queue because
  // queueing is accummulative.


  clearIfContinuousEvent(topLevelType, nativeEvent); // This is not replayable so we'll invoke it but without a target,
  // in case the event system needs to trace it.

  if (enableFlareAPI) {
    if (eventSystemFlags & PLUGIN_EVENT_SYSTEM) {
      dispatchEventForPluginEventSystem(topLevelType, eventSystemFlags, nativeEvent, null);
    }

    if (eventSystemFlags & RESPONDER_EVENT_SYSTEM) {
      // React Flare event system
      dispatchEventForResponderEventSystem(topLevelType, null, nativeEvent, getEventTarget(nativeEvent), eventSystemFlags);
    }
  } else {
    dispatchEventForPluginEventSystem(topLevelType, eventSystemFlags, nativeEvent, null);
  }
} // Attempt dispatching an event. Returns a SuspenseInstance or Container if it's blocked.

function attemptToDispatchEvent(topLevelType, eventSystemFlags, nativeEvent) {
  // TODO: Warn if _enabled is false.
  var nativeEventTarget = getEventTarget(nativeEvent);
  var targetInst = getClosestInstanceFromNode(nativeEventTarget);

  if (targetInst !== null) {
    var nearestMounted = getNearestMountedFiber(targetInst);

    if (nearestMounted === null) {
      // This tree has been unmounted already. Dispatch without a target.
      targetInst = null;
    } else {
      var tag = nearestMounted.tag;

      if (tag === SuspenseComponent) {
        var instance = getSuspenseInstanceFromFiber(nearestMounted);

        if (instance !== null) {
          // Queue the event to be replayed later. Abort dispatching since we
          // don't want this event dispatched twice through the event system.
          // TODO: If this is the first discrete event in the queue. Schedule an increased
          // priority for this boundary.
          return instance;
        } // This shouldn't happen, something went wrong but to avoid blocking
        // the whole system, dispatch the event without a target.
        // TODO: Warn.


        targetInst = null;
      } else if (tag === HostRoot) {
        var root = nearestMounted.stateNode;

        if (root.hydrate) {
          // If this happens during a replay something went wrong and it might block
          // the whole system.
          return getContainerFromFiber(nearestMounted);
        }

        targetInst = null;
      } else if (nearestMounted !== targetInst) {
        // If we get an event (ex: img onload) before committing that
        // component's mount, ignore it for now (that is, treat it as if it was an
        // event on a non-React tree). We might also consider queueing events and
        // dispatching them after the mount.
        targetInst = null;
      }
    }
  }

  if (enableFlareAPI) {
    if (eventSystemFlags & PLUGIN_EVENT_SYSTEM) {
      dispatchEventForPluginEventSystem(topLevelType, eventSystemFlags, nativeEvent, targetInst);
    }

    if (eventSystemFlags & RESPONDER_EVENT_SYSTEM) {
      // React Flare event system
      dispatchEventForResponderEventSystem(topLevelType, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags);
    }
  } else {
    dispatchEventForPluginEventSystem(topLevelType, eventSystemFlags, nativeEvent, targetInst);
  } // We're not blocked on anything.


  return null;
}

/**
 * Checks if an event is supported in the current execution environment.
 *
 * NOTE: This will not work correctly for non-generic events such as `change`,
 * `reset`, `load`, `error`, and `select`.
 *
 * Borrows from Modernizr.
 *
 * @param {string} eventNameSuffix Event name, e.g. "click".
 * @return {boolean} True if the event is supported.
 * @internal
 * @license Modernizr 3.0.0pre (Custom Build) | MIT
 */

function isEventSupported(eventNameSuffix) {
  if (!canUseDOM) {
    return false;
  }

  var eventName = 'on' + eventNameSuffix;
  var isSupported = eventName in document;

  if (!isSupported) {
    var element = document.createElement('div');
    element.setAttribute(eventName, 'return;');
    isSupported = typeof element[eventName] === 'function';
  }

  return isSupported;
}

/**
 * Summary of `ReactBrowserEventEmitter` event handling:
 *
 *  - Top-level delegation is used to trap most native browser events. This
 *    may only occur in the main thread and is the responsibility of
 *    ReactDOMEventListener, which is injected and can therefore support
 *    pluggable event sources. This is the only work that occurs in the main
 *    thread.
 *
 *  - We normalize and de-duplicate events to account for browser quirks. This
 *    may be done in the worker thread.
 *
 *  - Forward these native events (with the associated top-level type used to
 *    trap it) to `EventPluginHub`, which in turn will ask plugins if they want
 *    to extract any synthetic events.
 *
 *  - The `EventPluginHub` will then process each event by annotating them with
 *    "dispatches", a sequence of listeners and IDs that care about that event.
 *
 *  - The `EventPluginHub` then dispatches the events.
 *
 * Overview of React and the event system:
 *
 * +------------+    .
 * |    DOM     |    .
 * +------------+    .
 *       |           .
 *       v           .
 * +------------+    .
 * | ReactEvent |    .
 * |  Listener  |    .
 * +------------+    .                         +-----------+
 *       |           .               +--------+|SimpleEvent|
 *       |           .               |         |Plugin     |
 * +-----|------+    .               v         +-----------+
 * |     |      |    .    +--------------+                    +------------+
 * |     +-----------.--->|EventPluginHub|                    |    Event   |
 * |            |    .    |              |     +-----------+  | Propagators|
 * | ReactEvent |    .    |              |     |TapEvent   |  |------------|
 * |  Emitter   |    .    |              |<---+|Plugin     |  |other plugin|
 * |            |    .    |              |     +-----------+  |  utilities |
 * |     +-----------.--->|              |                    +------------+
 * |     |      |    .    +--------------+
 * +-----|------+    .                ^        +-----------+
 *       |           .                |        |Enter/Leave|
 *       +           .                +-------+|Plugin     |
 * +-------------+   .                         +-----------+
 * | application |   .
 * |-------------|   .
 * |             |   .
 * |             |   .
 * +-------------+   .
 *                   .
 *    React Core     .  General Purpose Event Plugin System
 */

var PossiblyWeakMap = typeof WeakMap === 'function' ? WeakMap : Map;
var elementListeningSets = new PossiblyWeakMap();
function getListeningSetForElement(element) {
  var listeningSet = elementListeningSets.get(element);

  if (listeningSet === undefined) {
    listeningSet = new Set();
    elementListeningSets.set(element, listeningSet);
  }

  return listeningSet;
}
/**
 * We listen for bubbled touch events on the document object.
 *
 * Firefox v8.01 (and possibly others) exhibited strange behavior when
 * mounting `onmousemove` events at some node that was not the document
 * element. The symptoms were that if your mouse is not moving over something
 * contained within that mount point (for example on the background) the
 * top-level listeners for `onmousemove` won't be called. However, if you
 * register the `mousemove` on the document object, then it will of course
 * catch all `mousemove`s. This along with iOS quirks, justifies restricting
 * top-level listeners to the document object only, at least for these
 * movement types of events and possibly all events.
 *
 * @see http://www.quirksmode.org/blog/archives/2010/09/click_event_del.html
 *
 * Also, `keyup`/`keypress`/`keydown` do not bubble to the window on IE, but
 * they bubble to document.
 *
 * @param {string} registrationName Name of listener (e.g. `onClick`).
 * @param {object} mountAt Container where to mount the listener
 */

function listenTo(registrationName, mountAt) {
  var listeningSet = getListeningSetForElement(mountAt);
  var dependencies = registrationNameDependencies[registrationName];

  for (var i = 0; i < dependencies.length; i++) {
    var dependency = dependencies[i];
    listenToTopLevel(dependency, mountAt, listeningSet);
  }
}
function listenToTopLevel(topLevelType, mountAt, listeningSet) {
  if (!listeningSet.has(topLevelType)) {
    switch (topLevelType) {
      case TOP_SCROLL:
        trapCapturedEvent(TOP_SCROLL, mountAt);
        break;

      case TOP_FOCUS:
      case TOP_BLUR:
        trapCapturedEvent(TOP_FOCUS, mountAt);
        trapCapturedEvent(TOP_BLUR, mountAt); // We set the flag for a single dependency later in this function,
        // but this ensures we mark both as attached rather than just one.

        listeningSet.add(TOP_BLUR);
        listeningSet.add(TOP_FOCUS);
        break;

      case TOP_CANCEL:
      case TOP_CLOSE:
        if (isEventSupported(getRawEventName(topLevelType))) {
          trapCapturedEvent(topLevelType, mountAt);
        }

        break;

      case TOP_INVALID:
      case TOP_SUBMIT:
      case TOP_RESET:
        // We listen to them on the target DOM elements.
        // Some of them bubble so we don't want them to fire twice.
        break;

      default:
        // By default, listen on the top level to all non-media events.
        // Media events don't bubble so adding the listener wouldn't do anything.
        var isMediaEvent = mediaEventTypes.indexOf(topLevelType) !== -1;

        if (!isMediaEvent) {
          trapBubbledEvent(topLevelType, mountAt);
        }

        break;
    }

    listeningSet.add(topLevelType);
  }
}
function isListeningToAllDependencies(registrationName, mountAt) {
  var listeningSet = getListeningSetForElement(mountAt);
  var dependencies = registrationNameDependencies[registrationName];

  for (var i = 0; i < dependencies.length; i++) {
    var dependency = dependencies[i];

    if (!listeningSet.has(dependency)) {
      return false;
    }
  }

  return true;
}

// List derived from Gecko source code:
// https://github.com/mozilla/gecko-dev/blob/4e638efc71/layout/style/test/property_database.js
var shorthandToLonghand = {
  animation: ['animationDelay', 'animationDirection', 'animationDuration', 'animationFillMode', 'animationIterationCount', 'animationName', 'animationPlayState', 'animationTimingFunction'],
  background: ['backgroundAttachment', 'backgroundClip', 'backgroundColor', 'backgroundImage', 'backgroundOrigin', 'backgroundPositionX', 'backgroundPositionY', 'backgroundRepeat', 'backgroundSize'],
  backgroundPosition: ['backgroundPositionX', 'backgroundPositionY'],
  border: ['borderBottomColor', 'borderBottomStyle', 'borderBottomWidth', 'borderImageOutset', 'borderImageRepeat', 'borderImageSlice', 'borderImageSource', 'borderImageWidth', 'borderLeftColor', 'borderLeftStyle', 'borderLeftWidth', 'borderRightColor', 'borderRightStyle', 'borderRightWidth', 'borderTopColor', 'borderTopStyle', 'borderTopWidth'],
  borderBlockEnd: ['borderBlockEndColor', 'borderBlockEndStyle', 'borderBlockEndWidth'],
  borderBlockStart: ['borderBlockStartColor', 'borderBlockStartStyle', 'borderBlockStartWidth'],
  borderBottom: ['borderBottomColor', 'borderBottomStyle', 'borderBottomWidth'],
  borderColor: ['borderBottomColor', 'borderLeftColor', 'borderRightColor', 'borderTopColor'],
  borderImage: ['borderImageOutset', 'borderImageRepeat', 'borderImageSlice', 'borderImageSource', 'borderImageWidth'],
  borderInlineEnd: ['borderInlineEndColor', 'borderInlineEndStyle', 'borderInlineEndWidth'],
  borderInlineStart: ['borderInlineStartColor', 'borderInlineStartStyle', 'borderInlineStartWidth'],
  borderLeft: ['borderLeftColor', 'borderLeftStyle', 'borderLeftWidth'],
  borderRadius: ['borderBottomLeftRadius', 'borderBottomRightRadius', 'borderTopLeftRadius', 'borderTopRightRadius'],
  borderRight: ['borderRightColor', 'borderRightStyle', 'borderRightWidth'],
  borderStyle: ['borderBottomStyle', 'borderLeftStyle', 'borderRightStyle', 'borderTopStyle'],
  borderTop: ['borderTopColor', 'borderTopStyle', 'borderTopWidth'],
  borderWidth: ['borderBottomWidth', 'borderLeftWidth', 'borderRightWidth', 'borderTopWidth'],
  columnRule: ['columnRuleColor', 'columnRuleStyle', 'columnRuleWidth'],
  columns: ['columnCount', 'columnWidth'],
  flex: ['flexBasis', 'flexGrow', 'flexShrink'],
  flexFlow: ['flexDirection', 'flexWrap'],
  font: ['fontFamily', 'fontFeatureSettings', 'fontKerning', 'fontLanguageOverride', 'fontSize', 'fontSizeAdjust', 'fontStretch', 'fontStyle', 'fontVariant', 'fontVariantAlternates', 'fontVariantCaps', 'fontVariantEastAsian', 'fontVariantLigatures', 'fontVariantNumeric', 'fontVariantPosition', 'fontWeight', 'lineHeight'],
  fontVariant: ['fontVariantAlternates', 'fontVariantCaps', 'fontVariantEastAsian', 'fontVariantLigatures', 'fontVariantNumeric', 'fontVariantPosition'],
  gap: ['columnGap', 'rowGap'],
  grid: ['gridAutoColumns', 'gridAutoFlow', 'gridAutoRows', 'gridTemplateAreas', 'gridTemplateColumns', 'gridTemplateRows'],
  gridArea: ['gridColumnEnd', 'gridColumnStart', 'gridRowEnd', 'gridRowStart'],
  gridColumn: ['gridColumnEnd', 'gridColumnStart'],
  gridColumnGap: ['columnGap'],
  gridGap: ['columnGap', 'rowGap'],
  gridRow: ['gridRowEnd', 'gridRowStart'],
  gridRowGap: ['rowGap'],
  gridTemplate: ['gridTemplateAreas', 'gridTemplateColumns', 'gridTemplateRows'],
  listStyle: ['listStyleImage', 'listStylePosition', 'listStyleType'],
  margin: ['marginBottom', 'marginLeft', 'marginRight', 'marginTop'],
  marker: ['markerEnd', 'markerMid', 'markerStart'],
  mask: ['maskClip', 'maskComposite', 'maskImage', 'maskMode', 'maskOrigin', 'maskPositionX', 'maskPositionY', 'maskRepeat', 'maskSize'],
  maskPosition: ['maskPositionX', 'maskPositionY'],
  outline: ['outlineColor', 'outlineStyle', 'outlineWidth'],
  overflow: ['overflowX', 'overflowY'],
  padding: ['paddingBottom', 'paddingLeft', 'paddingRight', 'paddingTop'],
  placeContent: ['alignContent', 'justifyContent'],
  placeItems: ['alignItems', 'justifyItems'],
  placeSelf: ['alignSelf', 'justifySelf'],
  textDecoration: ['textDecorationColor', 'textDecorationLine', 'textDecorationStyle'],
  textEmphasis: ['textEmphasisColor', 'textEmphasisStyle'],
  transition: ['transitionDelay', 'transitionDuration', 'transitionProperty', 'transitionTimingFunction'],
  wordWrap: ['overflowWrap']
};

/**
 * CSS properties which accept numbers but are not in units of "px".
 */
var isUnitlessNumber = {
  animationIterationCount: true,
  borderImageOutset: true,
  borderImageSlice: true,
  borderImageWidth: true,
  boxFlex: true,
  boxFlexGroup: true,
  boxOrdinalGroup: true,
  columnCount: true,
  columns: true,
  flex: true,
  flexGrow: true,
  flexPositive: true,
  flexShrink: true,
  flexNegative: true,
  flexOrder: true,
  gridArea: true,
  gridRow: true,
  gridRowEnd: true,
  gridRowSpan: true,
  gridRowStart: true,
  gridColumn: true,
  gridColumnEnd: true,
  gridColumnSpan: true,
  gridColumnStart: true,
  fontWeight: true,
  lineClamp: true,
  lineHeight: true,
  opacity: true,
  order: true,
  orphans: true,
  tabSize: true,
  widows: true,
  zIndex: true,
  zoom: true,
  // SVG-related properties
  fillOpacity: true,
  floodOpacity: true,
  stopOpacity: true,
  strokeDasharray: true,
  strokeDashoffset: true,
  strokeMiterlimit: true,
  strokeOpacity: true,
  strokeWidth: true
};
/**
 * @param {string} prefix vendor-specific prefix, eg: Webkit
 * @param {string} key style name, eg: transitionDuration
 * @return {string} style name prefixed with `prefix`, properly camelCased, eg:
 * WebkitTransitionDuration
 */

function prefixKey(prefix, key) {
  return prefix + key.charAt(0).toUpperCase() + key.substring(1);
}
/**
 * Support style names that may come passed in prefixed by adding permutations
 * of vendor prefixes.
 */


var prefixes = ['Webkit', 'ms', 'Moz', 'O']; // Using Object.keys here, or else the vanilla for-in loop makes IE8 go into an
// infinite loop, because it iterates over the newly added props too.

Object.keys(isUnitlessNumber).forEach(function (prop) {
  prefixes.forEach(function (prefix) {
    isUnitlessNumber[prefixKey(prefix, prop)] = isUnitlessNumber[prop];
  });
});

/**
 * Convert a value into the proper css writable value. The style name `name`
 * should be logical (no hyphens), as specified
 * in `CSSProperty.isUnitlessNumber`.
 *
 * @param {string} name CSS property name such as `topMargin`.
 * @param {*} value CSS property value such as `10px`.
 * @return {string} Normalized style value with dimensions applied.
 */

function dangerousStyleValue(name, value, isCustomProperty) {
  // Note that we've removed escapeTextForBrowser() calls here since the
  // whole string will be escaped when the attribute is injected into
  // the markup. If you provide unsafe user data here they can inject
  // arbitrary CSS which may be problematic (I couldn't repro this):
  // https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet
  // http://www.thespanner.co.uk/2007/11/26/ultimate-xss-css-injection/
  // This is not an XSS hole but instead a potential CSS injection issue
  // which has lead to a greater discussion about how we're going to
  // trust URLs moving forward. See #2115901
  var isEmpty = value == null || typeof value === 'boolean' || value === '';

  if (isEmpty) {
    return '';
  }

  if (!isCustomProperty && typeof value === 'number' && value !== 0 && !(isUnitlessNumber.hasOwnProperty(name) && isUnitlessNumber[name])) {
    return value + 'px'; // Presumes implicit 'px' suffix for unitless numbers
  }

  return ('' + value).trim();
}

var uppercasePattern = /([A-Z])/g;
var msPattern = /^ms-/;
/**
 * Hyphenates a camelcased CSS property name, for example:
 *
 *   > hyphenateStyleName('backgroundColor')
 *   < "background-color"
 *   > hyphenateStyleName('MozTransition')
 *   < "-moz-transition"
 *   > hyphenateStyleName('msTransition')
 *   < "-ms-transition"
 *
 * As Modernizr suggests (http://modernizr.com/docs/#prefixed), an `ms` prefix
 * is converted to `-ms-`.
 */

function hyphenateStyleName(name) {
  return name.replace(uppercasePattern, '-$1').toLowerCase().replace(msPattern, '-ms-');
}

var warnValidStyle = function () {};

{
  // 'msTransform' is correct, but the other prefixes should be capitalized
  var badVendoredStyleNamePattern = /^(?:webkit|moz|o)[A-Z]/;
  var msPattern$1 = /^-ms-/;
  var hyphenPattern = /-(.)/g; // style values shouldn't contain a semicolon

  var badStyleValueWithSemicolonPattern = /;\s*$/;
  var warnedStyleNames = {};
  var warnedStyleValues = {};
  var warnedForNaNValue = false;
  var warnedForInfinityValue = false;

  var camelize = function (string) {
    return string.replace(hyphenPattern, function (_, character) {
      return character.toUpperCase();
    });
  };

  var warnHyphenatedStyleName = function (name) {
    if (warnedStyleNames.hasOwnProperty(name) && warnedStyleNames[name]) {
      return;
    }

    warnedStyleNames[name] = true;
    warning$1(false, 'Unsupported style property %s. Did you mean %s?', name, // As Andi Smith suggests
    // (http://www.andismith.com/blog/2012/02/modernizr-prefixed/), an `-ms` prefix
    // is converted to lowercase `ms`.
    camelize(name.replace(msPattern$1, 'ms-')));
  };

  var warnBadVendoredStyleName = function (name) {
    if (warnedStyleNames.hasOwnProperty(name) && warnedStyleNames[name]) {
      return;
    }

    warnedStyleNames[name] = true;
    warning$1(false, 'Unsupported vendor-prefixed style property %s. Did you mean %s?', name, name.charAt(0).toUpperCase() + name.slice(1));
  };

  var warnStyleValueWithSemicolon = function (name, value) {
    if (warnedStyleValues.hasOwnProperty(value) && warnedStyleValues[value]) {
      return;
    }

    warnedStyleValues[value] = true;
    warning$1(false, "Style property values shouldn't contain a semicolon. " + 'Try "%s: %s" instead.', name, value.replace(badStyleValueWithSemicolonPattern, ''));
  };

  var warnStyleValueIsNaN = function (name, value) {
    if (warnedForNaNValue) {
      return;
    }

    warnedForNaNValue = true;
    warning$1(false, '`NaN` is an invalid value for the `%s` css style property.', name);
  };

  var warnStyleValueIsInfinity = function (name, value) {
    if (warnedForInfinityValue) {
      return;
    }

    warnedForInfinityValue = true;
    warning$1(false, '`Infinity` is an invalid value for the `%s` css style property.', name);
  };

  warnValidStyle = function (name, value) {
    if (name.indexOf('-') > -1) {
      warnHyphenatedStyleName(name);
    } else if (badVendoredStyleNamePattern.test(name)) {
      warnBadVendoredStyleName(name);
    } else if (badStyleValueWithSemicolonPattern.test(value)) {
      warnStyleValueWithSemicolon(name, value);
    }

    if (typeof value === 'number') {
      if (isNaN(value)) {
        warnStyleValueIsNaN(name, value);
      } else if (!isFinite(value)) {
        warnStyleValueIsInfinity(name, value);
      }
    }
  };
}

var warnValidStyle$1 = warnValidStyle;

/**
 * Operations for dealing with CSS properties.
 */

/**
 * This creates a string that is expected to be equivalent to the style
 * attribute generated by server-side rendering. It by-passes warnings and
 * security checks so it's not safe to use this value for anything other than
 * comparison. It is only used in DEV for SSR validation.
 */

function createDangerousStringForStyles(styles) {
  {
    var serialized = '';
    var delimiter = '';

    for (var styleName in styles) {
      if (!styles.hasOwnProperty(styleName)) {
        continue;
      }

      var styleValue = styles[styleName];

      if (styleValue != null) {
        var isCustomProperty = styleName.indexOf('--') === 0;
        serialized += delimiter + (isCustomProperty ? styleName : hyphenateStyleName(styleName)) + ':';
        serialized += dangerousStyleValue(styleName, styleValue, isCustomProperty);
        delimiter = ';';
      }
    }

    return serialized || null;
  }
}
/**
 * Sets the value for multiple styles on a node.  If a value is specified as
 * '' (empty string), the corresponding style property will be unset.
 *
 * @param {DOMElement} node
 * @param {object} styles
 */

function setValueForStyles(node, styles) {
  var style = node.style;

  for (var styleName in styles) {
    if (!styles.hasOwnProperty(styleName)) {
      continue;
    }

    var isCustomProperty = styleName.indexOf('--') === 0;

    {
      if (!isCustomProperty) {
        warnValidStyle$1(styleName, styles[styleName]);
      }
    }

    var styleValue = dangerousStyleValue(styleName, styles[styleName], isCustomProperty);

    if (styleName === 'float') {
      styleName = 'cssFloat';
    }

    if (isCustomProperty) {
      style.setProperty(styleName, styleValue);
    } else {
      style[styleName] = styleValue;
    }
  }
}

function isValueEmpty(value) {
  return value == null || typeof value === 'boolean' || value === '';
}
/**
 * Given {color: 'red', overflow: 'hidden'} returns {
 *   color: 'color',
 *   overflowX: 'overflow',
 *   overflowY: 'overflow',
 * }. This can be read as "the overflowY property was set by the overflow
 * shorthand". That is, the values are the property that each was derived from.
 */


function expandShorthandMap(styles) {
  var expanded = {};

  for (var key in styles) {
    var longhands = shorthandToLonghand[key] || [key];

    for (var i = 0; i < longhands.length; i++) {
      expanded[longhands[i]] = key;
    }
  }

  return expanded;
}
/**
 * When mixing shorthand and longhand property names, we warn during updates if
 * we expect an incorrect result to occur. In particular, we warn for:
 *
 * Updating a shorthand property (longhand gets overwritten):
 *   {font: 'foo', fontVariant: 'bar'} -> {font: 'baz', fontVariant: 'bar'}
 *   becomes .style.font = 'baz'
 * Removing a shorthand property (longhand gets lost too):
 *   {font: 'foo', fontVariant: 'bar'} -> {fontVariant: 'bar'}
 *   becomes .style.font = ''
 * Removing a longhand property (should revert to shorthand; doesn't):
 *   {font: 'foo', fontVariant: 'bar'} -> {font: 'foo'}
 *   becomes .style.fontVariant = ''
 */


function validateShorthandPropertyCollisionInDev(styleUpdates, nextStyles) {
  if (!warnAboutShorthandPropertyCollision) {
    return;
  }

  if (!nextStyles) {
    return;
  }

  var expandedUpdates = expandShorthandMap(styleUpdates);
  var expandedStyles = expandShorthandMap(nextStyles);
  var warnedAbout = {};

  for (var key in expandedUpdates) {
    var originalKey = expandedUpdates[key];
    var correctOriginalKey = expandedStyles[key];

    if (correctOriginalKey && originalKey !== correctOriginalKey) {
      var warningKey = originalKey + ',' + correctOriginalKey;

      if (warnedAbout[warningKey]) {
        continue;
      }

      warnedAbout[warningKey] = true;
      warning$1(false, '%s a style property during rerender (%s) when a ' + 'conflicting property is set (%s) can lead to styling bugs. To ' + "avoid this, don't mix shorthand and non-shorthand properties " + 'for the same value; instead, replace the shorthand with ' + 'separate values.', isValueEmpty(styleUpdates[originalKey]) ? 'Removing' : 'Updating', originalKey, correctOriginalKey);
    }
  }
}

// For HTML, certain tags should omit their close tag. We keep a whitelist for
// those special-case tags.
var omittedCloseTags = {
  area: true,
  base: true,
  br: true,
  col: true,
  embed: true,
  hr: true,
  img: true,
  input: true,
  keygen: true,
  link: true,
  meta: true,
  param: true,
  source: true,
  track: true,
  wbr: true // NOTE: menuitem's close tag should be omitted, but that causes problems.

};

// `omittedCloseTags` except that `menuitem` should still have its closing tag.

var voidElementTags = _assign({
  menuitem: true
}, omittedCloseTags);

// or add stack by default to invariants where possible.

var HTML$1 = '__html';
var ReactDebugCurrentFrame$3 = null;

{
  ReactDebugCurrentFrame$3 = ReactSharedInternals.ReactDebugCurrentFrame;
}

function assertValidProps(tag, props) {
  if (!props) {
    return;
  } // Note the use of `==` which checks for null or undefined.


  if (voidElementTags[tag]) {
    if (!(props.children == null && props.dangerouslySetInnerHTML == null)) {
      {
        throw Error(tag + " is a void element tag and must neither have `children` nor use `dangerouslySetInnerHTML`." + (ReactDebugCurrentFrame$3.getStackAddendum()));
      }
    }
  }

  if (props.dangerouslySetInnerHTML != null) {
    if (!(props.children == null)) {
      {
        throw Error("Can only set one of `children` or `props.dangerouslySetInnerHTML`.");
      }
    }

    if (!(typeof props.dangerouslySetInnerHTML === 'object' && HTML$1 in props.dangerouslySetInnerHTML)) {
      {
        throw Error("`props.dangerouslySetInnerHTML` must be in the form `{__html: ...}`. Please visit https://fb.me/react-invariant-dangerously-set-inner-html for more information.");
      }
    }
  }

  {
    !(props.suppressContentEditableWarning || !props.contentEditable || props.children == null) ? warning$1(false, 'A component is `contentEditable` and contains `children` managed by ' + 'React. It is now your responsibility to guarantee that none of ' + 'those nodes are unexpectedly modified or duplicated. This is ' + 'probably not intentional.') : void 0;
  }

  if (!(props.style == null || typeof props.style === 'object')) {
    {
      throw Error("The `style` prop expects a mapping from style properties to values, not a string. For example, style={{marginRight: spacing + 'em'}} when using JSX." + (ReactDebugCurrentFrame$3.getStackAddendum()));
    }
  }
}

function isCustomComponent(tagName, props) {
  if (tagName.indexOf('-') === -1) {
    return typeof props.is === 'string';
  }

  switch (tagName) {
    // These are reserved SVG and MathML elements.
    // We don't mind this whitelist too much because we expect it to never grow.
    // The alternative is to track the namespace in a few places which is convoluted.
    // https://w3c.github.io/webcomponents/spec/custom/#custom-elements-core-concepts
    case 'annotation-xml':
    case 'color-profile':
    case 'font-face':
    case 'font-face-src':
    case 'font-face-uri':
    case 'font-face-format':
    case 'font-face-name':
    case 'missing-glyph':
      return false;

    default:
      return true;
  }
}

// When adding attributes to the HTML or SVG whitelist, be sure to
// also add them to this module to ensure casing and incorrect name
// warnings.
var possibleStandardNames = {
  // HTML
  accept: 'accept',
  acceptcharset: 'acceptCharset',
  'accept-charset': 'acceptCharset',
  accesskey: 'accessKey',
  action: 'action',
  allowfullscreen: 'allowFullScreen',
  alt: 'alt',
  as: 'as',
  async: 'async',
  autocapitalize: 'autoCapitalize',
  autocomplete: 'autoComplete',
  autocorrect: 'autoCorrect',
  autofocus: 'autoFocus',
  autoplay: 'autoPlay',
  autosave: 'autoSave',
  capture: 'capture',
  cellpadding: 'cellPadding',
  cellspacing: 'cellSpacing',
  challenge: 'challenge',
  charset: 'charSet',
  checked: 'checked',
  children: 'children',
  cite: 'cite',
  class: 'className',
  classid: 'classID',
  classname: 'className',
  cols: 'cols',
  colspan: 'colSpan',
  content: 'content',
  contenteditable: 'contentEditable',
  contextmenu: 'contextMenu',
  controls: 'controls',
  controlslist: 'controlsList',
  coords: 'coords',
  crossorigin: 'crossOrigin',
  dangerouslysetinnerhtml: 'dangerouslySetInnerHTML',
  data: 'data',
  datetime: 'dateTime',
  default: 'default',
  defaultchecked: 'defaultChecked',
  defaultvalue: 'defaultValue',
  defer: 'defer',
  dir: 'dir',
  disabled: 'disabled',
  disablepictureinpicture: 'disablePictureInPicture',
  download: 'download',
  draggable: 'draggable',
  enctype: 'encType',
  for: 'htmlFor',
  form: 'form',
  formmethod: 'formMethod',
  formaction: 'formAction',
  formenctype: 'formEncType',
  formnovalidate: 'formNoValidate',
  formtarget: 'formTarget',
  frameborder: 'frameBorder',
  headers: 'headers',
  height: 'height',
  hidden: 'hidden',
  high: 'high',
  href: 'href',
  hreflang: 'hrefLang',
  htmlfor: 'htmlFor',
  httpequiv: 'httpEquiv',
  'http-equiv': 'httpEquiv',
  icon: 'icon',
  id: 'id',
  innerhtml: 'innerHTML',
  inputmode: 'inputMode',
  integrity: 'integrity',
  is: 'is',
  itemid: 'itemID',
  itemprop: 'itemProp',
  itemref: 'itemRef',
  itemscope: 'itemScope',
  itemtype: 'itemType',
  keyparams: 'keyParams',
  keytype: 'keyType',
  kind: 'kind',
  label: 'label',
  lang: 'lang',
  list: 'list',
  loop: 'loop',
  low: 'low',
  manifest: 'manifest',
  marginwidth: 'marginWidth',
  marginheight: 'marginHeight',
  max: 'max',
  maxlength: 'maxLength',
  media: 'media',
  mediagroup: 'mediaGroup',
  method: 'method',
  min: 'min',
  minlength: 'minLength',
  multiple: 'multiple',
  muted: 'muted',
  name: 'name',
  nomodule: 'noModule',
  nonce: 'nonce',
  novalidate: 'noValidate',
  open: 'open',
  optimum: 'optimum',
  pattern: 'pattern',
  placeholder: 'placeholder',
  playsinline: 'playsInline',
  poster: 'poster',
  preload: 'preload',
  profile: 'profile',
  radiogroup: 'radioGroup',
  readonly: 'readOnly',
  referrerpolicy: 'referrerPolicy',
  rel: 'rel',
  required: 'required',
  reversed: 'reversed',
  role: 'role',
  rows: 'rows',
  rowspan: 'rowSpan',
  sandbox: 'sandbox',
  scope: 'scope',
  scoped: 'scoped',
  scrolling: 'scrolling',
  seamless: 'seamless',
  selected: 'selected',
  shape: 'shape',
  size: 'size',
  sizes: 'sizes',
  span: 'span',
  spellcheck: 'spellCheck',
  src: 'src',
  srcdoc: 'srcDoc',
  srclang: 'srcLang',
  srcset: 'srcSet',
  start: 'start',
  step: 'step',
  style: 'style',
  summary: 'summary',
  tabindex: 'tabIndex',
  target: 'target',
  title: 'title',
  type: 'type',
  usemap: 'useMap',
  value: 'value',
  width: 'width',
  wmode: 'wmode',
  wrap: 'wrap',
  // SVG
  about: 'about',
  accentheight: 'accentHeight',
  'accent-height': 'accentHeight',
  accumulate: 'accumulate',
  additive: 'additive',
  alignmentbaseline: 'alignmentBaseline',
  'alignment-baseline': 'alignmentBaseline',
  allowreorder: 'allowReorder',
  alphabetic: 'alphabetic',
  amplitude: 'amplitude',
  arabicform: 'arabicForm',
  'arabic-form': 'arabicForm',
  ascent: 'ascent',
  attributename: 'attributeName',
  attributetype: 'attributeType',
  autoreverse: 'autoReverse',
  azimuth: 'azimuth',
  basefrequency: 'baseFrequency',
  baselineshift: 'baselineShift',
  'baseline-shift': 'baselineShift',
  baseprofile: 'baseProfile',
  bbox: 'bbox',
  begin: 'begin',
  bias: 'bias',
  by: 'by',
  calcmode: 'calcMode',
  capheight: 'capHeight',
  'cap-height': 'capHeight',
  clip: 'clip',
  clippath: 'clipPath',
  'clip-path': 'clipPath',
  clippathunits: 'clipPathUnits',
  cliprule: 'clipRule',
  'clip-rule': 'clipRule',
  color: 'color',
  colorinterpolation: 'colorInterpolation',
  'color-interpolation': 'colorInterpolation',
  colorinterpolationfilters: 'colorInterpolationFilters',
  'color-interpolation-filters': 'colorInterpolationFilters',
  colorprofile: 'colorProfile',
  'color-profile': 'colorProfile',
  colorrendering: 'colorRendering',
  'color-rendering': 'colorRendering',
  contentscripttype: 'contentScriptType',
  contentstyletype: 'contentStyleType',
  cursor: 'cursor',
  cx: 'cx',
  cy: 'cy',
  d: 'd',
  datatype: 'datatype',
  decelerate: 'decelerate',
  descent: 'descent',
  diffuseconstant: 'diffuseConstant',
  direction: 'direction',
  display: 'display',
  divisor: 'divisor',
  dominantbaseline: 'dominantBaseline',
  'dominant-baseline': 'dominantBaseline',
  dur: 'dur',
  dx: 'dx',
  dy: 'dy',
  edgemode: 'edgeMode',
  elevation: 'elevation',
  enablebackground: 'enableBackground',
  'enable-background': 'enableBackground',
  end: 'end',
  exponent: 'exponent',
  externalresourcesrequired: 'externalResourcesRequired',
  fill: 'fill',
  fillopacity: 'fillOpacity',
  'fill-opacity': 'fillOpacity',
  fillrule: 'fillRule',
  'fill-rule': 'fillRule',
  filter: 'filter',
  filterres: 'filterRes',
  filterunits: 'filterUnits',
  floodopacity: 'floodOpacity',
  'flood-opacity': 'floodOpacity',
  floodcolor: 'floodColor',
  'flood-color': 'floodColor',
  focusable: 'focusable',
  fontfamily: 'fontFamily',
  'font-family': 'fontFamily',
  fontsize: 'fontSize',
  'font-size': 'fontSize',
  fontsizeadjust: 'fontSizeAdjust',
  'font-size-adjust': 'fontSizeAdjust',
  fontstretch: 'fontStretch',
  'font-stretch': 'fontStretch',
  fontstyle: 'fontStyle',
  'font-style': 'fontStyle',
  fontvariant: 'fontVariant',
  'font-variant': 'fontVariant',
  fontweight: 'fontWeight',
  'font-weight': 'fontWeight',
  format: 'format',
  from: 'from',
  fx: 'fx',
  fy: 'fy',
  g1: 'g1',
  g2: 'g2',
  glyphname: 'glyphName',
  'glyph-name': 'glyphName',
  glyphorientationhorizontal: 'glyphOrientationHorizontal',
  'glyph-orientation-horizontal': 'glyphOrientationHorizontal',
  glyphorientationvertical: 'glyphOrientationVertical',
  'glyph-orientation-vertical': 'glyphOrientationVertical',
  glyphref: 'glyphRef',
  gradienttransform: 'gradientTransform',
  gradientunits: 'gradientUnits',
  hanging: 'hanging',
  horizadvx: 'horizAdvX',
  'horiz-adv-x': 'horizAdvX',
  horizoriginx: 'horizOriginX',
  'horiz-origin-x': 'horizOriginX',
  ideographic: 'ideographic',
  imagerendering: 'imageRendering',
  'image-rendering': 'imageRendering',
  in2: 'in2',
  in: 'in',
  inlist: 'inlist',
  intercept: 'intercept',
  k1: 'k1',
  k2: 'k2',
  k3: 'k3',
  k4: 'k4',
  k: 'k',
  kernelmatrix: 'kernelMatrix',
  kernelunitlength: 'kernelUnitLength',
  kerning: 'kerning',
  keypoints: 'keyPoints',
  keysplines: 'keySplines',
  keytimes: 'keyTimes',
  lengthadjust: 'lengthAdjust',
  letterspacing: 'letterSpacing',
  'letter-spacing': 'letterSpacing',
  lightingcolor: 'lightingColor',
  'lighting-color': 'lightingColor',
  limitingconeangle: 'limitingConeAngle',
  local: 'local',
  markerend: 'markerEnd',
  'marker-end': 'markerEnd',
  markerheight: 'markerHeight',
  markermid: 'markerMid',
  'marker-mid': 'markerMid',
  markerstart: 'markerStart',
  'marker-start': 'markerStart',
  markerunits: 'markerUnits',
  markerwidth: 'markerWidth',
  mask: 'mask',
  maskcontentunits: 'maskContentUnits',
  maskunits: 'maskUnits',
  mathematical: 'mathematical',
  mode: 'mode',
  numoctaves: 'numOctaves',
  offset: 'offset',
  opacity: 'opacity',
  operator: 'operator',
  order: 'order',
  orient: 'orient',
  orientation: 'orientation',
  origin: 'origin',
  overflow: 'overflow',
  overlineposition: 'overlinePosition',
  'overline-position': 'overlinePosition',
  overlinethickness: 'overlineThickness',
  'overline-thickness': 'overlineThickness',
  paintorder: 'paintOrder',
  'paint-order': 'paintOrder',
  panose1: 'panose1',
  'panose-1': 'panose1',
  pathlength: 'pathLength',
  patterncontentunits: 'patternContentUnits',
  patterntransform: 'patternTransform',
  patternunits: 'patternUnits',
  pointerevents: 'pointerEvents',
  'pointer-events': 'pointerEvents',
  points: 'points',
  pointsatx: 'pointsAtX',
  pointsaty: 'pointsAtY',
  pointsatz: 'pointsAtZ',
  prefix: 'prefix',
  preservealpha: 'preserveAlpha',
  preserveaspectratio: 'preserveAspectRatio',
  primitiveunits: 'primitiveUnits',
  property: 'property',
  r: 'r',
  radius: 'radius',
  refx: 'refX',
  refy: 'refY',
  renderingintent: 'renderingIntent',
  'rendering-intent': 'renderingIntent',
  repeatcount: 'repeatCount',
  repeatdur: 'repeatDur',
  requiredextensions: 'requiredExtensions',
  requiredfeatures: 'requiredFeatures',
  resource: 'resource',
  restart: 'restart',
  result: 'result',
  results: 'results',
  rotate: 'rotate',
  rx: 'rx',
  ry: 'ry',
  scale: 'scale',
  security: 'security',
  seed: 'seed',
  shaperendering: 'shapeRendering',
  'shape-rendering': 'shapeRendering',
  slope: 'slope',
  spacing: 'spacing',
  specularconstant: 'specularConstant',
  specularexponent: 'specularExponent',
  speed: 'speed',
  spreadmethod: 'spreadMethod',
  startoffset: 'startOffset',
  stddeviation: 'stdDeviation',
  stemh: 'stemh',
  stemv: 'stemv',
  stitchtiles: 'stitchTiles',
  stopcolor: 'stopColor',
  'stop-color': 'stopColor',
  stopopacity: 'stopOpacity',
  'stop-opacity': 'stopOpacity',
  strikethroughposition: 'strikethroughPosition',
  'strikethrough-position': 'strikethroughPosition',
  strikethroughthickness: 'strikethroughThickness',
  'strikethrough-thickness': 'strikethroughThickness',
  string: 'string',
  stroke: 'stroke',
  strokedasharray: 'strokeDasharray',
  'stroke-dasharray': 'strokeDasharray',
  strokedashoffset: 'strokeDashoffset',
  'stroke-dashoffset': 'strokeDashoffset',
  strokelinecap: 'strokeLinecap',
  'stroke-linecap': 'strokeLinecap',
  strokelinejoin: 'strokeLinejoin',
  'stroke-linejoin': 'strokeLinejoin',
  strokemiterlimit: 'strokeMiterlimit',
  'stroke-miterlimit': 'strokeMiterlimit',
  strokewidth: 'strokeWidth',
  'stroke-width': 'strokeWidth',
  strokeopacity: 'strokeOpacity',
  'stroke-opacity': 'strokeOpacity',
  suppresscontenteditablewarning: 'suppressContentEditableWarning',
  suppresshydrationwarning: 'suppressHydrationWarning',
  surfacescale: 'surfaceScale',
  systemlanguage: 'systemLanguage',
  tablevalues: 'tableValues',
  targetx: 'targetX',
  targety: 'targetY',
  textanchor: 'textAnchor',
  'text-anchor': 'textAnchor',
  textdecoration: 'textDecoration',
  'text-decoration': 'textDecoration',
  textlength: 'textLength',
  textrendering: 'textRendering',
  'text-rendering': 'textRendering',
  to: 'to',
  transform: 'transform',
  typeof: 'typeof',
  u1: 'u1',
  u2: 'u2',
  underlineposition: 'underlinePosition',
  'underline-position': 'underlinePosition',
  underlinethickness: 'underlineThickness',
  'underline-thickness': 'underlineThickness',
  unicode: 'unicode',
  unicodebidi: 'unicodeBidi',
  'unicode-bidi': 'unicodeBidi',
  unicoderange: 'unicodeRange',
  'unicode-range': 'unicodeRange',
  unitsperem: 'unitsPerEm',
  'units-per-em': 'unitsPerEm',
  unselectable: 'unselectable',
  valphabetic: 'vAlphabetic',
  'v-alphabetic': 'vAlphabetic',
  values: 'values',
  vectoreffect: 'vectorEffect',
  'vector-effect': 'vectorEffect',
  version: 'version',
  vertadvy: 'vertAdvY',
  'vert-adv-y': 'vertAdvY',
  vertoriginx: 'vertOriginX',
  'vert-origin-x': 'vertOriginX',
  vertoriginy: 'vertOriginY',
  'vert-origin-y': 'vertOriginY',
  vhanging: 'vHanging',
  'v-hanging': 'vHanging',
  videographic: 'vIdeographic',
  'v-ideographic': 'vIdeographic',
  viewbox: 'viewBox',
  viewtarget: 'viewTarget',
  visibility: 'visibility',
  vmathematical: 'vMathematical',
  'v-mathematical': 'vMathematical',
  vocab: 'vocab',
  widths: 'widths',
  wordspacing: 'wordSpacing',
  'word-spacing': 'wordSpacing',
  writingmode: 'writingMode',
  'writing-mode': 'writingMode',
  x1: 'x1',
  x2: 'x2',
  x: 'x',
  xchannelselector: 'xChannelSelector',
  xheight: 'xHeight',
  'x-height': 'xHeight',
  xlinkactuate: 'xlinkActuate',
  'xlink:actuate': 'xlinkActuate',
  xlinkarcrole: 'xlinkArcrole',
  'xlink:arcrole': 'xlinkArcrole',
  xlinkhref: 'xlinkHref',
  'xlink:href': 'xlinkHref',
  xlinkrole: 'xlinkRole',
  'xlink:role': 'xlinkRole',
  xlinkshow: 'xlinkShow',
  'xlink:show': 'xlinkShow',
  xlinktitle: 'xlinkTitle',
  'xlink:title': 'xlinkTitle',
  xlinktype: 'xlinkType',
  'xlink:type': 'xlinkType',
  xmlbase: 'xmlBase',
  'xml:base': 'xmlBase',
  xmllang: 'xmlLang',
  'xml:lang': 'xmlLang',
  xmlns: 'xmlns',
  'xml:space': 'xmlSpace',
  xmlnsxlink: 'xmlnsXlink',
  'xmlns:xlink': 'xmlnsXlink',
  xmlspace: 'xmlSpace',
  y1: 'y1',
  y2: 'y2',
  y: 'y',
  ychannelselector: 'yChannelSelector',
  z: 'z',
  zoomandpan: 'zoomAndPan'
};

var ariaProperties = {
  'aria-current': 0,
  // state
  'aria-details': 0,
  'aria-disabled': 0,
  // state
  'aria-hidden': 0,
  // state
  'aria-invalid': 0,
  // state
  'aria-keyshortcuts': 0,
  'aria-label': 0,
  'aria-roledescription': 0,
  // Widget Attributes
  'aria-autocomplete': 0,
  'aria-checked': 0,
  'aria-expanded': 0,
  'aria-haspopup': 0,
  'aria-level': 0,
  'aria-modal': 0,
  'aria-multiline': 0,
  'aria-multiselectable': 0,
  'aria-orientation': 0,
  'aria-placeholder': 0,
  'aria-pressed': 0,
  'aria-readonly': 0,
  'aria-required': 0,
  'aria-selected': 0,
  'aria-sort': 0,
  'aria-valuemax': 0,
  'aria-valuemin': 0,
  'aria-valuenow': 0,
  'aria-valuetext': 0,
  // Live Region Attributes
  'aria-atomic': 0,
  'aria-busy': 0,
  'aria-live': 0,
  'aria-relevant': 0,
  // Drag-and-Drop Attributes
  'aria-dropeffect': 0,
  'aria-grabbed': 0,
  // Relationship Attributes
  'aria-activedescendant': 0,
  'aria-colcount': 0,
  'aria-colindex': 0,
  'aria-colspan': 0,
  'aria-controls': 0,
  'aria-describedby': 0,
  'aria-errormessage': 0,
  'aria-flowto': 0,
  'aria-labelledby': 0,
  'aria-owns': 0,
  'aria-posinset': 0,
  'aria-rowcount': 0,
  'aria-rowindex': 0,
  'aria-rowspan': 0,
  'aria-setsize': 0
};

var warnedProperties = {};
var rARIA = new RegExp('^(aria)-[' + ATTRIBUTE_NAME_CHAR + ']*$');
var rARIACamel = new RegExp('^(aria)[A-Z][' + ATTRIBUTE_NAME_CHAR + ']*$');
var hasOwnProperty$1 = Object.prototype.hasOwnProperty;

function validateProperty(tagName, name) {
  if (hasOwnProperty$1.call(warnedProperties, name) && warnedProperties[name]) {
    return true;
  }

  if (rARIACamel.test(name)) {
    var ariaName = 'aria-' + name.slice(4).toLowerCase();
    var correctName = ariaProperties.hasOwnProperty(ariaName) ? ariaName : null; // If this is an aria-* attribute, but is not listed in the known DOM
    // DOM properties, then it is an invalid aria-* attribute.

    if (correctName == null) {
      warning$1(false, 'Invalid ARIA attribute `%s`. ARIA attributes follow the pattern aria-* and must be lowercase.', name);
      warnedProperties[name] = true;
      return true;
    } // aria-* attributes should be lowercase; suggest the lowercase version.


    if (name !== correctName) {
      warning$1(false, 'Invalid ARIA attribute `%s`. Did you mean `%s`?', name, correctName);
      warnedProperties[name] = true;
      return true;
    }
  }

  if (rARIA.test(name)) {
    var lowerCasedName = name.toLowerCase();
    var standardName = ariaProperties.hasOwnProperty(lowerCasedName) ? lowerCasedName : null; // If this is an aria-* attribute, but is not listed in the known DOM
    // DOM properties, then it is an invalid aria-* attribute.

    if (standardName == null) {
      warnedProperties[name] = true;
      return false;
    } // aria-* attributes should be lowercase; suggest the lowercase version.


    if (name !== standardName) {
      warning$1(false, 'Unknown ARIA attribute `%s`. Did you mean `%s`?', name, standardName);
      warnedProperties[name] = true;
      return true;
    }
  }

  return true;
}

function warnInvalidARIAProps(type, props) {
  var invalidProps = [];

  for (var key in props) {
    var isValid = validateProperty(type, key);

    if (!isValid) {
      invalidProps.push(key);
    }
  }

  var unknownPropString = invalidProps.map(function (prop) {
    return '`' + prop + '`';
  }).join(', ');

  if (invalidProps.length === 1) {
    warning$1(false, 'Invalid aria prop %s on <%s> tag. ' + 'For details, see https://fb.me/invalid-aria-prop', unknownPropString, type);
  } else if (invalidProps.length > 1) {
    warning$1(false, 'Invalid aria props %s on <%s> tag. ' + 'For details, see https://fb.me/invalid-aria-prop', unknownPropString, type);
  }
}

function validateProperties(type, props) {
  if (isCustomComponent(type, props)) {
    return;
  }

  warnInvalidARIAProps(type, props);
}

var didWarnValueNull = false;
function validateProperties$1(type, props) {
  if (type !== 'input' && type !== 'textarea' && type !== 'select') {
    return;
  }

  if (props != null && props.value === null && !didWarnValueNull) {
    didWarnValueNull = true;

    if (type === 'select' && props.multiple) {
      warning$1(false, '`value` prop on `%s` should not be null. ' + 'Consider using an empty array when `multiple` is set to `true` ' + 'to clear the component or `undefined` for uncontrolled components.', type);
    } else {
      warning$1(false, '`value` prop on `%s` should not be null. ' + 'Consider using an empty string to clear the component or `undefined` ' + 'for uncontrolled components.', type);
    }
  }
}

var validateProperty$1 = function () {};

{
  var warnedProperties$1 = {};
  var _hasOwnProperty = Object.prototype.hasOwnProperty;
  var EVENT_NAME_REGEX = /^on./;
  var INVALID_EVENT_NAME_REGEX = /^on[^A-Z]/;
  var rARIA$1 = new RegExp('^(aria)-[' + ATTRIBUTE_NAME_CHAR + ']*$');
  var rARIACamel$1 = new RegExp('^(aria)[A-Z][' + ATTRIBUTE_NAME_CHAR + ']*$');

  validateProperty$1 = function (tagName, name, value, canUseEventSystem) {
    if (_hasOwnProperty.call(warnedProperties$1, name) && warnedProperties$1[name]) {
      return true;
    }

    var lowerCasedName = name.toLowerCase();

    if (lowerCasedName === 'onfocusin' || lowerCasedName === 'onfocusout') {
      warning$1(false, 'React uses onFocus and onBlur instead of onFocusIn and onFocusOut. ' + 'All React events are normalized to bubble, so onFocusIn and onFocusOut ' + 'are not needed/supported by React.');
      warnedProperties$1[name] = true;
      return true;
    } // We can't rely on the event system being injected on the server.


    if (canUseEventSystem) {
      if (registrationNameModules.hasOwnProperty(name)) {
        return true;
      }

      var registrationName = possibleRegistrationNames.hasOwnProperty(lowerCasedName) ? possibleRegistrationNames[lowerCasedName] : null;

      if (registrationName != null) {
        warning$1(false, 'Invalid event handler property `%s`. Did you mean `%s`?', name, registrationName);
        warnedProperties$1[name] = true;
        return true;
      }

      if (EVENT_NAME_REGEX.test(name)) {
        warning$1(false, 'Unknown event handler property `%s`. It will be ignored.', name);
        warnedProperties$1[name] = true;
        return true;
      }
    } else if (EVENT_NAME_REGEX.test(name)) {
      // If no event plugins have been injected, we are in a server environment.
      // So we can't tell if the event name is correct for sure, but we can filter
      // out known bad ones like `onclick`. We can't suggest a specific replacement though.
      if (INVALID_EVENT_NAME_REGEX.test(name)) {
        warning$1(false, 'Invalid event handler property `%s`. ' + 'React events use the camelCase naming convention, for example `onClick`.', name);
      }

      warnedProperties$1[name] = true;
      return true;
    } // Let the ARIA attribute hook validate ARIA attributes


    if (rARIA$1.test(name) || rARIACamel$1.test(name)) {
      return true;
    }

    if (lowerCasedName === 'innerhtml') {
      warning$1(false, 'Directly setting property `innerHTML` is not permitted. ' + 'For more information, lookup documentation on `dangerouslySetInnerHTML`.');
      warnedProperties$1[name] = true;
      return true;
    }

    if (lowerCasedName === 'aria') {
      warning$1(false, 'The `aria` attribute is reserved for future use in React. ' + 'Pass individual `aria-` attributes instead.');
      warnedProperties$1[name] = true;
      return true;
    }

    if (lowerCasedName === 'is' && value !== null && value !== undefined && typeof value !== 'string') {
      warning$1(false, 'Received a `%s` for a string attribute `is`. If this is expected, cast ' + 'the value to a string.', typeof value);
      warnedProperties$1[name] = true;
      return true;
    }

    if (typeof value === 'number' && isNaN(value)) {
      warning$1(false, 'Received NaN for the `%s` attribute. If this is expected, cast ' + 'the value to a string.', name);
      warnedProperties$1[name] = true;
      return true;
    }

    var propertyInfo = getPropertyInfo(name);
    var isReserved = propertyInfo !== null && propertyInfo.type === RESERVED; // Known attributes should match the casing specified in the property config.

    if (possibleStandardNames.hasOwnProperty(lowerCasedName)) {
      var standardName = possibleStandardNames[lowerCasedName];

      if (standardName !== name) {
        warning$1(false, 'Invalid DOM property `%s`. Did you mean `%s`?', name, standardName);
        warnedProperties$1[name] = true;
        return true;
      }
    } else if (!isReserved && name !== lowerCasedName) {
      // Unknown attributes should have lowercase casing since that's how they
      // will be cased anyway with server rendering.
      warning$1(false, 'React does not recognize the `%s` prop on a DOM element. If you ' + 'intentionally want it to appear in the DOM as a custom ' + 'attribute, spell it as lowercase `%s` instead. ' + 'If you accidentally passed it from a parent component, remove ' + 'it from the DOM element.', name, lowerCasedName);
      warnedProperties$1[name] = true;
      return true;
    }

    if (typeof value === 'boolean' && shouldRemoveAttributeWithWarning(name, value, propertyInfo, false)) {
      if (value) {
        warning$1(false, 'Received `%s` for a non-boolean attribute `%s`.\n\n' + 'If you want to write it to the DOM, pass a string instead: ' + '%s="%s" or %s={value.toString()}.', value, name, name, value, name);
      } else {
        warning$1(false, 'Received `%s` for a non-boolean attribute `%s`.\n\n' + 'If you want to write it to the DOM, pass a string instead: ' + '%s="%s" or %s={value.toString()}.\n\n' + 'If you used to conditionally omit it with %s={condition && value}, ' + 'pass %s={condition ? value : undefined} instead.', value, name, name, value, name, name, name);
      }

      warnedProperties$1[name] = true;
      return true;
    } // Now that we've validated casing, do not validate
    // data types for reserved props


    if (isReserved) {
      return true;
    } // Warn when a known attribute is a bad type


    if (shouldRemoveAttributeWithWarning(name, value, propertyInfo, false)) {
      warnedProperties$1[name] = true;
      return false;
    } // Warn when passing the strings 'false' or 'true' into a boolean prop


    if ((value === 'false' || value === 'true') && propertyInfo !== null && propertyInfo.type === BOOLEAN) {
      warning$1(false, 'Received the string `%s` for the boolean attribute `%s`. ' + '%s ' + 'Did you mean %s={%s}?', value, name, value === 'false' ? 'The browser will interpret it as a truthy value.' : 'Although this works, it will not work as expected if you pass the string "false".', name, value);
      warnedProperties$1[name] = true;
      return true;
    }

    return true;
  };
}

var warnUnknownProperties = function (type, props, canUseEventSystem) {
  var unknownProps = [];

  for (var key in props) {
    var isValid = validateProperty$1(type, key, props[key], canUseEventSystem);

    if (!isValid) {
      unknownProps.push(key);
    }
  }

  var unknownPropString = unknownProps.map(function (prop) {
    return '`' + prop + '`';
  }).join(', ');

  if (unknownProps.length === 1) {
    warning$1(false, 'Invalid value for prop %s on <%s> tag. Either remove it from the element, ' + 'or pass a string or number value to keep it in the DOM. ' + 'For details, see https://fb.me/react-attribute-behavior', unknownPropString, type);
  } else if (unknownProps.length > 1) {
    warning$1(false, 'Invalid values for props %s on <%s> tag. Either remove them from the element, ' + 'or pass a string or number value to keep them in the DOM. ' + 'For details, see https://fb.me/react-attribute-behavior', unknownPropString, type);
  }
};

function validateProperties$2(type, props, canUseEventSystem) {
  if (isCustomComponent(type, props)) {
    return;
  }

  warnUnknownProperties(type, props, canUseEventSystem);
}

// TODO: direct imports like some-package/src/* are bad. Fix me.
var didWarnInvalidHydration = false;
var didWarnShadyDOM = false;
var didWarnScriptTags = false;
var DANGEROUSLY_SET_INNER_HTML = 'dangerouslySetInnerHTML';
var SUPPRESS_CONTENT_EDITABLE_WARNING = 'suppressContentEditableWarning';
var SUPPRESS_HYDRATION_WARNING$1 = 'suppressHydrationWarning';
var AUTOFOCUS = 'autoFocus';
var CHILDREN = 'children';
var STYLE$1 = 'style';
var HTML = '__html';
var LISTENERS = 'listeners';
var HTML_NAMESPACE = Namespaces.html;
var warnedUnknownTags;
var suppressHydrationWarning;
var validatePropertiesInDevelopment;
var warnForTextDifference;
var warnForPropDifference;
var warnForExtraAttributes;
var warnForInvalidEventListener;
var canDiffStyleForHydrationWarning;
var normalizeMarkupForTextOrAttribute;
var normalizeHTML;

{
  warnedUnknownTags = {
    // Chrome is the only major browser not shipping <time>. But as of July
    // 2017 it intends to ship it due to widespread usage. We intentionally
    // *don't* warn for <time> even if it's unrecognized by Chrome because
    // it soon will be, and many apps have been using it anyway.
    time: true,
    // There are working polyfills for <dialog>. Let people use it.
    dialog: true,
    // Electron ships a custom <webview> tag to display external web content in
    // an isolated frame and process.
    // This tag is not present in non Electron environments such as JSDom which
    // is often used for testing purposes.
    // @see https://electronjs.org/docs/api/webview-tag
    webview: true
  };

  validatePropertiesInDevelopment = function (type, props) {
    validateProperties(type, props);
    validateProperties$1(type, props);
    validateProperties$2(type, props,
    /* canUseEventSystem */
    true);
  }; // IE 11 parses & normalizes the style attribute as opposed to other
  // browsers. It adds spaces and sorts the properties in some
  // non-alphabetical order. Handling that would require sorting CSS
  // properties in the client & server versions or applying
  // `expectedStyle` to a temporary DOM node to read its `style` attribute
  // normalized. Since it only affects IE, we're skipping style warnings
  // in that browser completely in favor of doing all that work.
  // See https://github.com/facebook/react/issues/11807


  canDiffStyleForHydrationWarning = canUseDOM && !document.documentMode; // HTML parsing normalizes CR and CRLF to LF.
  // It also can turn \u0000 into \uFFFD inside attributes.
  // https://www.w3.org/TR/html5/single-page.html#preprocessing-the-input-stream
  // If we have a mismatch, it might be caused by that.
  // We will still patch up in this case but not fire the warning.

  var NORMALIZE_NEWLINES_REGEX = /\r\n?/g;
  var NORMALIZE_NULL_AND_REPLACEMENT_REGEX = /\u0000|\uFFFD/g;

  normalizeMarkupForTextOrAttribute = function (markup) {
    var markupString = typeof markup === 'string' ? markup : '' + markup;
    return markupString.replace(NORMALIZE_NEWLINES_REGEX, '\n').replace(NORMALIZE_NULL_AND_REPLACEMENT_REGEX, '');
  };

  warnForTextDifference = function (serverText, clientText) {
    if (didWarnInvalidHydration) {
      return;
    }

    var normalizedClientText = normalizeMarkupForTextOrAttribute(clientText);
    var normalizedServerText = normalizeMarkupForTextOrAttribute(serverText);

    if (normalizedServerText === normalizedClientText) {
      return;
    }

    didWarnInvalidHydration = true;
    warningWithoutStack$1(false, 'Text content did not match. Server: "%s" Client: "%s"', normalizedServerText, normalizedClientText);
  };

  warnForPropDifference = function (propName, serverValue, clientValue) {
    if (didWarnInvalidHydration) {
      return;
    }

    var normalizedClientValue = normalizeMarkupForTextOrAttribute(clientValue);
    var normalizedServerValue = normalizeMarkupForTextOrAttribute(serverValue);

    if (normalizedServerValue === normalizedClientValue) {
      return;
    }

    didWarnInvalidHydration = true;
    warningWithoutStack$1(false, 'Prop `%s` did not match. Server: %s Client: %s', propName, JSON.stringify(normalizedServerValue), JSON.stringify(normalizedClientValue));
  };

  warnForExtraAttributes = function (attributeNames) {
    if (didWarnInvalidHydration) {
      return;
    }

    didWarnInvalidHydration = true;
    var names = [];
    attributeNames.forEach(function (name) {
      names.push(name);
    });
    warningWithoutStack$1(false, 'Extra attributes from the server: %s', names);
  };

  warnForInvalidEventListener = function (registrationName, listener) {
    if (listener === false) {
      warning$1(false, 'Expected `%s` listener to be a function, instead got `false`.\n\n' + 'If you used to conditionally omit it with %s={condition && value}, ' + 'pass %s={condition ? value : undefined} instead.', registrationName, registrationName, registrationName);
    } else {
      warning$1(false, 'Expected `%s` listener to be a function, instead got a value of `%s` type.', registrationName, typeof listener);
    }
  }; // Parse the HTML and read it back to normalize the HTML string so that it
  // can be used for comparison.


  normalizeHTML = function (parent, html) {
    // We could have created a separate document here to avoid
    // re-initializing custom elements if they exist. But this breaks
    // how <noscript> is being handled. So we use the same document.
    // See the discussion in https://github.com/facebook/react/pull/11157.
    var testElement = parent.namespaceURI === HTML_NAMESPACE ? parent.ownerDocument.createElement(parent.tagName) : parent.ownerDocument.createElementNS(parent.namespaceURI, parent.tagName);
    testElement.innerHTML = html;
    return testElement.innerHTML;
  };
}

function ensureListeningTo(rootContainerElement, registrationName) {
  var isDocumentOrFragment = rootContainerElement.nodeType === DOCUMENT_NODE || rootContainerElement.nodeType === DOCUMENT_FRAGMENT_NODE;
  var doc = isDocumentOrFragment ? rootContainerElement : rootContainerElement.ownerDocument;
  listenTo(registrationName, doc);
}

function getOwnerDocumentFromRootContainer(rootContainerElement) {
  return rootContainerElement.nodeType === DOCUMENT_NODE ? rootContainerElement : rootContainerElement.ownerDocument;
}

function noop() {}

function trapClickOnNonInteractiveElement(node) {
  // Mobile Safari does not fire properly bubble click events on
  // non-interactive elements, which means delegated click listeners do not
  // fire. The workaround for this bug involves attaching an empty click
  // listener on the target node.
  // http://www.quirksmode.org/blog/archives/2010/09/click_event_del.html
  // Just set it using the onclick property so that we don't have to manage any
  // bookkeeping for it. Not sure if we need to clear it when the listener is
  // removed.
  // TODO: Only do this for the relevant Safaris maybe?
  node.onclick = noop;
}

function setInitialDOMProperties(tag, domElement, rootContainerElement, nextProps, isCustomComponentTag) {
  for (var propKey in nextProps) {
    if (!nextProps.hasOwnProperty(propKey)) {
      continue;
    }

    var nextProp = nextProps[propKey];

    if (propKey === STYLE$1) {
      {
        if (nextProp) {
          // Freeze the next style object so that we can assume it won't be
          // mutated. We have already warned for this in the past.
          Object.freeze(nextProp);
        }
      } // Relies on `updateStylesByID` not mutating `styleUpdates`.


      setValueForStyles(domElement, nextProp);
    } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
      var nextHtml = nextProp ? nextProp[HTML] : undefined;

      if (nextHtml != null) {
        setInnerHTML(domElement, nextHtml);
      }
    } else if (propKey === CHILDREN) {
      if (typeof nextProp === 'string') {
        // Avoid setting initial textContent when the text is empty. In IE11 setting
        // textContent on a <textarea> will cause the placeholder to not
        // show within the <textarea> until it has been focused and blurred again.
        // https://github.com/facebook/react/issues/6731#issuecomment-254874553
        var canSetTextContent = tag !== 'textarea' || nextProp !== '';

        if (canSetTextContent) {
          setTextContent(domElement, nextProp);
        }
      } else if (typeof nextProp === 'number') {
        setTextContent(domElement, '' + nextProp);
      }
    } else if (enableFlareAPI && propKey === LISTENERS || propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING$1) {// Noop
    } else if (propKey === AUTOFOCUS) {// We polyfill it separately on the client during commit.
      // We could have excluded it in the property list instead of
      // adding a special case here, but then it wouldn't be emitted
      // on server rendering (but we *do* want to emit it in SSR).
    } else if (registrationNameModules.hasOwnProperty(propKey)) {
      if (nextProp != null) {
        if (true && typeof nextProp !== 'function') {
          warnForInvalidEventListener(propKey, nextProp);
        }

        ensureListeningTo(rootContainerElement, propKey);
      }
    } else if (nextProp != null) {
      setValueForProperty(domElement, propKey, nextProp, isCustomComponentTag);
    }
  }
}

function updateDOMProperties(domElement, updatePayload, wasCustomComponentTag, isCustomComponentTag) {
  // TODO: Handle wasCustomComponentTag
  for (var i = 0; i < updatePayload.length; i += 2) {
    var propKey = updatePayload[i];
    var propValue = updatePayload[i + 1];

    if (propKey === STYLE$1) {
      setValueForStyles(domElement, propValue);
    } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
      setInnerHTML(domElement, propValue);
    } else if (propKey === CHILDREN) {
      setTextContent(domElement, propValue);
    } else {
      setValueForProperty(domElement, propKey, propValue, isCustomComponentTag);
    }
  }
}

function createElement(type, props, rootContainerElement, parentNamespace) {
  var isCustomComponentTag; // We create tags in the namespace of their parent container, except HTML
  // tags get no namespace.

  var ownerDocument = getOwnerDocumentFromRootContainer(rootContainerElement);
  var domElement;
  var namespaceURI = parentNamespace;

  if (namespaceURI === HTML_NAMESPACE) {
    namespaceURI = getIntrinsicNamespace(type);
  }

  if (namespaceURI === HTML_NAMESPACE) {
    {
      isCustomComponentTag = isCustomComponent(type, props); // Should this check be gated by parent namespace? Not sure we want to
      // allow <SVG> or <mATH>.

      !(isCustomComponentTag || type === type.toLowerCase()) ? warning$1(false, '<%s /> is using incorrect casing. ' + 'Use PascalCase for React components, ' + 'or lowercase for HTML elements.', type) : void 0;
    }

    if (type === 'script') {
      // Create the script via .innerHTML so its "parser-inserted" flag is
      // set to true and it does not execute
      var div = ownerDocument.createElement('div');

      {
        if (enableTrustedTypesIntegration && !didWarnScriptTags) {
          warning$1(false, 'Encountered a script tag while rendering React component. ' + 'Scripts inside React components are never executed when rendering ' + 'on the client. Consider using template tag instead ' + '(https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template).');
          didWarnScriptTags = true;
        }
      }

      div.innerHTML = '<script><' + '/script>'; // eslint-disable-line
      // This is guaranteed to yield a script element.

      var firstChild = div.firstChild;
      domElement = div.removeChild(firstChild);
    } else if (typeof props.is === 'string') {
      // $FlowIssue `createElement` should be updated for Web Components
      domElement = ownerDocument.createElement(type, {
        is: props.is
      });
    } else {
      // Separate else branch instead of using `props.is || undefined` above because of a Firefox bug.
      // See discussion in https://github.com/facebook/react/pull/6896
      // and discussion in https://bugzilla.mozilla.org/show_bug.cgi?id=1276240
      domElement = ownerDocument.createElement(type); // Normally attributes are assigned in `setInitialDOMProperties`, however the `multiple` and `size`
      // attributes on `select`s needs to be added before `option`s are inserted.
      // This prevents:
      // - a bug where the `select` does not scroll to the correct option because singular
      //  `select` elements automatically pick the first item #13222
      // - a bug where the `select` set the first item as selected despite the `size` attribute #14239
      // See https://github.com/facebook/react/issues/13222
      // and https://github.com/facebook/react/issues/14239

      if (type === 'select') {
        var node = domElement;

        if (props.multiple) {
          node.multiple = true;
        } else if (props.size) {
          // Setting a size greater than 1 causes a select to behave like `multiple=true`, where
          // it is possible that no option is selected.
          //
          // This is only necessary when a select in "single selection mode".
          node.size = props.size;
        }
      }
    }
  } else {
    domElement = ownerDocument.createElementNS(namespaceURI, type);
  }

  {
    if (namespaceURI === HTML_NAMESPACE) {
      if (!isCustomComponentTag && Object.prototype.toString.call(domElement) === '[object HTMLUnknownElement]' && !Object.prototype.hasOwnProperty.call(warnedUnknownTags, type)) {
        warnedUnknownTags[type] = true;
        warning$1(false, 'The tag <%s> is unrecognized in this browser. ' + 'If you meant to render a React component, start its name with ' + 'an uppercase letter.', type);
      }
    }
  }

  return domElement;
}
function createTextNode(text, rootContainerElement) {
  return getOwnerDocumentFromRootContainer(rootContainerElement).createTextNode(text);
}
function setInitialProperties(domElement, tag, rawProps, rootContainerElement) {
  var isCustomComponentTag = isCustomComponent(tag, rawProps);

  {
    validatePropertiesInDevelopment(tag, rawProps);

    if (isCustomComponentTag && !didWarnShadyDOM && domElement.shadyRoot) {
      warning$1(false, '%s is using shady DOM. Using shady DOM with React can ' + 'cause things to break subtly.', getCurrentFiberOwnerNameInDevOrNull() || 'A component');
      didWarnShadyDOM = true;
    }
  } // TODO: Make sure that we check isMounted before firing any of these events.


  var props;

  switch (tag) {
    case 'iframe':
    case 'object':
    case 'embed':
      trapBubbledEvent(TOP_LOAD, domElement);
      props = rawProps;
      break;

    case 'video':
    case 'audio':
      // Create listener for each media event
      for (var i = 0; i < mediaEventTypes.length; i++) {
        trapBubbledEvent(mediaEventTypes[i], domElement);
      }

      props = rawProps;
      break;

    case 'source':
      trapBubbledEvent(TOP_ERROR, domElement);
      props = rawProps;
      break;

    case 'img':
    case 'image':
    case 'link':
      trapBubbledEvent(TOP_ERROR, domElement);
      trapBubbledEvent(TOP_LOAD, domElement);
      props = rawProps;
      break;

    case 'form':
      trapBubbledEvent(TOP_RESET, domElement);
      trapBubbledEvent(TOP_SUBMIT, domElement);
      props = rawProps;
      break;

    case 'details':
      trapBubbledEvent(TOP_TOGGLE, domElement);
      props = rawProps;
      break;

    case 'input':
      initWrapperState(domElement, rawProps);
      props = getHostProps(domElement, rawProps);
      trapBubbledEvent(TOP_INVALID, domElement); // For controlled components we always need to ensure we're listening
      // to onChange. Even if there is no listener.

      ensureListeningTo(rootContainerElement, 'onChange');
      break;

    case 'option':
      validateProps(domElement, rawProps);
      props = getHostProps$1(domElement, rawProps);
      break;

    case 'select':
      initWrapperState$1(domElement, rawProps);
      props = getHostProps$2(domElement, rawProps);
      trapBubbledEvent(TOP_INVALID, domElement); // For controlled components we always need to ensure we're listening
      // to onChange. Even if there is no listener.

      ensureListeningTo(rootContainerElement, 'onChange');
      break;

    case 'textarea':
      initWrapperState$2(domElement, rawProps);
      props = getHostProps$3(domElement, rawProps);
      trapBubbledEvent(TOP_INVALID, domElement); // For controlled components we always need to ensure we're listening
      // to onChange. Even if there is no listener.

      ensureListeningTo(rootContainerElement, 'onChange');
      break;

    default:
      props = rawProps;
  }

  assertValidProps(tag, props);
  setInitialDOMProperties(tag, domElement, rootContainerElement, props, isCustomComponentTag);

  switch (tag) {
    case 'input':
      // TODO: Make sure we check if this is still unmounted or do any clean
      // up necessary since we never stop tracking anymore.
      track(domElement);
      postMountWrapper(domElement, rawProps, false);
      break;

    case 'textarea':
      // TODO: Make sure we check if this is still unmounted or do any clean
      // up necessary since we never stop tracking anymore.
      track(domElement);
      postMountWrapper$3(domElement, rawProps);
      break;

    case 'option':
      postMountWrapper$1(domElement, rawProps);
      break;

    case 'select':
      postMountWrapper$2(domElement, rawProps);
      break;

    default:
      if (typeof props.onClick === 'function') {
        // TODO: This cast may not be sound for SVG, MathML or custom elements.
        trapClickOnNonInteractiveElement(domElement);
      }

      break;
  }
} // Calculate the diff between the two objects.

function diffProperties(domElement, tag, lastRawProps, nextRawProps, rootContainerElement) {
  {
    validatePropertiesInDevelopment(tag, nextRawProps);
  }

  var updatePayload = null;
  var lastProps;
  var nextProps;

  switch (tag) {
    case 'input':
      lastProps = getHostProps(domElement, lastRawProps);
      nextProps = getHostProps(domElement, nextRawProps);
      updatePayload = [];
      break;

    case 'option':
      lastProps = getHostProps$1(domElement, lastRawProps);
      nextProps = getHostProps$1(domElement, nextRawProps);
      updatePayload = [];
      break;

    case 'select':
      lastProps = getHostProps$2(domElement, lastRawProps);
      nextProps = getHostProps$2(domElement, nextRawProps);
      updatePayload = [];
      break;

    case 'textarea':
      lastProps = getHostProps$3(domElement, lastRawProps);
      nextProps = getHostProps$3(domElement, nextRawProps);
      updatePayload = [];
      break;

    default:
      lastProps = lastRawProps;
      nextProps = nextRawProps;

      if (typeof lastProps.onClick !== 'function' && typeof nextProps.onClick === 'function') {
        // TODO: This cast may not be sound for SVG, MathML or custom elements.
        trapClickOnNonInteractiveElement(domElement);
      }

      break;
  }

  assertValidProps(tag, nextProps);
  var propKey;
  var styleName;
  var styleUpdates = null;

  for (propKey in lastProps) {
    if (nextProps.hasOwnProperty(propKey) || !lastProps.hasOwnProperty(propKey) || lastProps[propKey] == null) {
      continue;
    }

    if (propKey === STYLE$1) {
      var lastStyle = lastProps[propKey];

      for (styleName in lastStyle) {
        if (lastStyle.hasOwnProperty(styleName)) {
          if (!styleUpdates) {
            styleUpdates = {};
          }

          styleUpdates[styleName] = '';
        }
      }
    } else if (propKey === DANGEROUSLY_SET_INNER_HTML || propKey === CHILDREN) {// Noop. This is handled by the clear text mechanism.
    } else if (enableFlareAPI && propKey === LISTENERS || propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING$1) {// Noop
    } else if (propKey === AUTOFOCUS) {// Noop. It doesn't work on updates anyway.
    } else if (registrationNameModules.hasOwnProperty(propKey)) {
      // This is a special case. If any listener updates we need to ensure
      // that the "current" fiber pointer gets updated so we need a commit
      // to update this element.
      if (!updatePayload) {
        updatePayload = [];
      }
    } else {
      // For all other deleted properties we add it to the queue. We use
      // the whitelist in the commit phase instead.
      (updatePayload = updatePayload || []).push(propKey, null);
    }
  }

  for (propKey in nextProps) {
    var nextProp = nextProps[propKey];
    var lastProp = lastProps != null ? lastProps[propKey] : undefined;

    if (!nextProps.hasOwnProperty(propKey) || nextProp === lastProp || nextProp == null && lastProp == null) {
      continue;
    }

    if (propKey === STYLE$1) {
      {
        if (nextProp) {
          // Freeze the next style object so that we can assume it won't be
          // mutated. We have already warned for this in the past.
          Object.freeze(nextProp);
        }
      }

      if (lastProp) {
        // Unset styles on `lastProp` but not on `nextProp`.
        for (styleName in lastProp) {
          if (lastProp.hasOwnProperty(styleName) && (!nextProp || !nextProp.hasOwnProperty(styleName))) {
            if (!styleUpdates) {
              styleUpdates = {};
            }

            styleUpdates[styleName] = '';
          }
        } // Update styles that changed since `lastProp`.


        for (styleName in nextProp) {
          if (nextProp.hasOwnProperty(styleName) && lastProp[styleName] !== nextProp[styleName]) {
            if (!styleUpdates) {
              styleUpdates = {};
            }

            styleUpdates[styleName] = nextProp[styleName];
          }
        }
      } else {
        // Relies on `updateStylesByID` not mutating `styleUpdates`.
        if (!styleUpdates) {
          if (!updatePayload) {
            updatePayload = [];
          }

          updatePayload.push(propKey, styleUpdates);
        }

        styleUpdates = nextProp;
      }
    } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
      var nextHtml = nextProp ? nextProp[HTML] : undefined;
      var lastHtml = lastProp ? lastProp[HTML] : undefined;

      if (nextHtml != null) {
        if (lastHtml !== nextHtml) {
          (updatePayload = updatePayload || []).push(propKey, toStringOrTrustedType(nextHtml));
        }
      } else {// TODO: It might be too late to clear this if we have children
        // inserted already.
      }
    } else if (propKey === CHILDREN) {
      if (lastProp !== nextProp && (typeof nextProp === 'string' || typeof nextProp === 'number')) {
        (updatePayload = updatePayload || []).push(propKey, '' + nextProp);
      }
    } else if (enableFlareAPI && propKey === LISTENERS || propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING$1) {// Noop
    } else if (registrationNameModules.hasOwnProperty(propKey)) {
      if (nextProp != null) {
        // We eagerly listen to this even though we haven't committed yet.
        if (true && typeof nextProp !== 'function') {
          warnForInvalidEventListener(propKey, nextProp);
        }

        ensureListeningTo(rootContainerElement, propKey);
      }

      if (!updatePayload && lastProp !== nextProp) {
        // This is a special case. If any listener updates we need to ensure
        // that the "current" props pointer gets updated so we need a commit
        // to update this element.
        updatePayload = [];
      }
    } else {
      // For any other property we always add it to the queue and then we
      // filter it out using the whitelist during the commit.
      (updatePayload = updatePayload || []).push(propKey, nextProp);
    }
  }

  if (styleUpdates) {
    {
      validateShorthandPropertyCollisionInDev(styleUpdates, nextProps[STYLE$1]);
    }

    (updatePayload = updatePayload || []).push(STYLE$1, styleUpdates);
  }

  return updatePayload;
} // Apply the diff.

function updateProperties(domElement, updatePayload, tag, lastRawProps, nextRawProps) {
  // Update checked *before* name.
  // In the middle of an update, it is possible to have multiple checked.
  // When a checked radio tries to change name, browser makes another radio's checked false.
  if (tag === 'input' && nextRawProps.type === 'radio' && nextRawProps.name != null) {
    updateChecked(domElement, nextRawProps);
  }

  var wasCustomComponentTag = isCustomComponent(tag, lastRawProps);
  var isCustomComponentTag = isCustomComponent(tag, nextRawProps); // Apply the diff.

  updateDOMProperties(domElement, updatePayload, wasCustomComponentTag, isCustomComponentTag); // TODO: Ensure that an update gets scheduled if any of the special props
  // changed.

  switch (tag) {
    case 'input':
      // Update the wrapper around inputs *after* updating props. This has to
      // happen after `updateDOMProperties`. Otherwise HTML5 input validations
      // raise warnings and prevent the new value from being assigned.
      updateWrapper(domElement, nextRawProps);
      break;

    case 'textarea':
      updateWrapper$1(domElement, nextRawProps);
      break;

    case 'select':
      // <select> value update needs to occur after <option> children
      // reconciliation
      postUpdateWrapper(domElement, nextRawProps);
      break;
  }
}

function getPossibleStandardName(propName) {
  {
    var lowerCasedName = propName.toLowerCase();

    if (!possibleStandardNames.hasOwnProperty(lowerCasedName)) {
      return null;
    }

    return possibleStandardNames[lowerCasedName] || null;
  }

  return null;
}

function diffHydratedProperties(domElement, tag, rawProps, parentNamespace, rootContainerElement) {
  var isCustomComponentTag;
  var extraAttributeNames;

  {
    suppressHydrationWarning = rawProps[SUPPRESS_HYDRATION_WARNING$1] === true;
    isCustomComponentTag = isCustomComponent(tag, rawProps);
    validatePropertiesInDevelopment(tag, rawProps);

    if (isCustomComponentTag && !didWarnShadyDOM && domElement.shadyRoot) {
      warning$1(false, '%s is using shady DOM. Using shady DOM with React can ' + 'cause things to break subtly.', getCurrentFiberOwnerNameInDevOrNull() || 'A component');
      didWarnShadyDOM = true;
    }
  } // TODO: Make sure that we check isMounted before firing any of these events.


  switch (tag) {
    case 'iframe':
    case 'object':
    case 'embed':
      trapBubbledEvent(TOP_LOAD, domElement);
      break;

    case 'video':
    case 'audio':
      // Create listener for each media event
      for (var i = 0; i < mediaEventTypes.length; i++) {
        trapBubbledEvent(mediaEventTypes[i], domElement);
      }

      break;

    case 'source':
      trapBubbledEvent(TOP_ERROR, domElement);
      break;

    case 'img':
    case 'image':
    case 'link':
      trapBubbledEvent(TOP_ERROR, domElement);
      trapBubbledEvent(TOP_LOAD, domElement);
      break;

    case 'form':
      trapBubbledEvent(TOP_RESET, domElement);
      trapBubbledEvent(TOP_SUBMIT, domElement);
      break;

    case 'details':
      trapBubbledEvent(TOP_TOGGLE, domElement);
      break;

    case 'input':
      initWrapperState(domElement, rawProps);
      trapBubbledEvent(TOP_INVALID, domElement); // For controlled components we always need to ensure we're listening
      // to onChange. Even if there is no listener.

      ensureListeningTo(rootContainerElement, 'onChange');
      break;

    case 'option':
      validateProps(domElement, rawProps);
      break;

    case 'select':
      initWrapperState$1(domElement, rawProps);
      trapBubbledEvent(TOP_INVALID, domElement); // For controlled components we always need to ensure we're listening
      // to onChange. Even if there is no listener.

      ensureListeningTo(rootContainerElement, 'onChange');
      break;

    case 'textarea':
      initWrapperState$2(domElement, rawProps);
      trapBubbledEvent(TOP_INVALID, domElement); // For controlled components we always need to ensure we're listening
      // to onChange. Even if there is no listener.

      ensureListeningTo(rootContainerElement, 'onChange');
      break;
  }

  assertValidProps(tag, rawProps);

  {
    extraAttributeNames = new Set();
    var attributes = domElement.attributes;

    for (var _i = 0; _i < attributes.length; _i++) {
      var name = attributes[_i].name.toLowerCase();

      switch (name) {
        // Built-in SSR attribute is whitelisted
        case 'data-reactroot':
          break;
        // Controlled attributes are not validated
        // TODO: Only ignore them on controlled tags.

        case 'value':
          break;

        case 'checked':
          break;

        case 'selected':
          break;

        default:
          // Intentionally use the original name.
          // See discussion in https://github.com/facebook/react/pull/10676.
          extraAttributeNames.add(attributes[_i].name);
      }
    }
  }

  var updatePayload = null;

  for (var propKey in rawProps) {
    if (!rawProps.hasOwnProperty(propKey)) {
      continue;
    }

    var nextProp = rawProps[propKey];

    if (propKey === CHILDREN) {
      // For text content children we compare against textContent. This
      // might match additional HTML that is hidden when we read it using
      // textContent. E.g. "foo" will match "f<span>oo</span>" but that still
      // satisfies our requirement. Our requirement is not to produce perfect
      // HTML and attributes. Ideally we should preserve structure but it's
      // ok not to if the visible content is still enough to indicate what
      // even listeners these nodes might be wired up to.
      // TODO: Warn if there is more than a single textNode as a child.
      // TODO: Should we use domElement.firstChild.nodeValue to compare?
      if (typeof nextProp === 'string') {
        if (domElement.textContent !== nextProp) {
          if (true && !suppressHydrationWarning) {
            warnForTextDifference(domElement.textContent, nextProp);
          }

          updatePayload = [CHILDREN, nextProp];
        }
      } else if (typeof nextProp === 'number') {
        if (domElement.textContent !== '' + nextProp) {
          if (true && !suppressHydrationWarning) {
            warnForTextDifference(domElement.textContent, nextProp);
          }

          updatePayload = [CHILDREN, '' + nextProp];
        }
      }
    } else if (registrationNameModules.hasOwnProperty(propKey)) {
      if (nextProp != null) {
        if (true && typeof nextProp !== 'function') {
          warnForInvalidEventListener(propKey, nextProp);
        }

        ensureListeningTo(rootContainerElement, propKey);
      }
    } else if (true && // Convince Flow we've calculated it (it's DEV-only in this method.)
    typeof isCustomComponentTag === 'boolean') {
      // Validate that the properties correspond to their expected values.
      var serverValue = void 0;
      var propertyInfo = getPropertyInfo(propKey);

      if (suppressHydrationWarning) {// Don't bother comparing. We're ignoring all these warnings.
      } else if (enableFlareAPI && propKey === LISTENERS || propKey === SUPPRESS_CONTENT_EDITABLE_WARNING || propKey === SUPPRESS_HYDRATION_WARNING$1 || // Controlled attributes are not validated
      // TODO: Only ignore them on controlled tags.
      propKey === 'value' || propKey === 'checked' || propKey === 'selected') {// Noop
      } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
        var serverHTML = domElement.innerHTML;
        var nextHtml = nextProp ? nextProp[HTML] : undefined;
        var expectedHTML = normalizeHTML(domElement, nextHtml != null ? nextHtml : '');

        if (expectedHTML !== serverHTML) {
          warnForPropDifference(propKey, serverHTML, expectedHTML);
        }
      } else if (propKey === STYLE$1) {
        // $FlowFixMe - Should be inferred as not undefined.
        extraAttributeNames.delete(propKey);

        if (canDiffStyleForHydrationWarning) {
          var expectedStyle = createDangerousStringForStyles(nextProp);
          serverValue = domElement.getAttribute('style');

          if (expectedStyle !== serverValue) {
            warnForPropDifference(propKey, serverValue, expectedStyle);
          }
        }
      } else if (isCustomComponentTag) {
        // $FlowFixMe - Should be inferred as not undefined.
        extraAttributeNames.delete(propKey.toLowerCase());
        serverValue = getValueForAttribute(domElement, propKey, nextProp);

        if (nextProp !== serverValue) {
          warnForPropDifference(propKey, serverValue, nextProp);
        }
      } else if (!shouldIgnoreAttribute(propKey, propertyInfo, isCustomComponentTag) && !shouldRemoveAttribute(propKey, nextProp, propertyInfo, isCustomComponentTag)) {
        var isMismatchDueToBadCasing = false;

        if (propertyInfo !== null) {
          // $FlowFixMe - Should be inferred as not undefined.
          extraAttributeNames.delete(propertyInfo.attributeName);
          serverValue = getValueForProperty(domElement, propKey, nextProp, propertyInfo);
        } else {
          var ownNamespace = parentNamespace;

          if (ownNamespace === HTML_NAMESPACE) {
            ownNamespace = getIntrinsicNamespace(tag);
          }

          if (ownNamespace === HTML_NAMESPACE) {
            // $FlowFixMe - Should be inferred as not undefined.
            extraAttributeNames.delete(propKey.toLowerCase());
          } else {
            var standardName = getPossibleStandardName(propKey);

            if (standardName !== null && standardName !== propKey) {
              // If an SVG prop is supplied with bad casing, it will
              // be successfully parsed from HTML, but will produce a mismatch
              // (and would be incorrectly rendered on the client).
              // However, we already warn about bad casing elsewhere.
              // So we'll skip the misleading extra mismatch warning in this case.
              isMismatchDueToBadCasing = true; // $FlowFixMe - Should be inferred as not undefined.

              extraAttributeNames.delete(standardName);
            } // $FlowFixMe - Should be inferred as not undefined.


            extraAttributeNames.delete(propKey);
          }

          serverValue = getValueForAttribute(domElement, propKey, nextProp);
        }

        if (nextProp !== serverValue && !isMismatchDueToBadCasing) {
          warnForPropDifference(propKey, serverValue, nextProp);
        }
      }
    }
  }

  {
    // $FlowFixMe - Should be inferred as not undefined.
    if (extraAttributeNames.size > 0 && !suppressHydrationWarning) {
      // $FlowFixMe - Should be inferred as not undefined.
      warnForExtraAttributes(extraAttributeNames);
    }
  }

  switch (tag) {
    case 'input':
      // TODO: Make sure we check if this is still unmounted or do any clean
      // up necessary since we never stop tracking anymore.
      track(domElement);
      postMountWrapper(domElement, rawProps, true);
      break;

    case 'textarea':
      // TODO: Make sure we check if this is still unmounted or do any clean
      // up necessary since we never stop tracking anymore.
      track(domElement);
      postMountWrapper$3(domElement, rawProps);
      break;

    case 'select':
    case 'option':
      // For input and textarea we current always set the value property at
      // post mount to force it to diverge from attributes. However, for
      // option and select we don't quite do the same thing and select
      // is not resilient to the DOM state changing so we don't do that here.
      // TODO: Consider not doing this for input and textarea.
      break;

    default:
      if (typeof rawProps.onClick === 'function') {
        // TODO: This cast may not be sound for SVG, MathML or custom elements.
        trapClickOnNonInteractiveElement(domElement);
      }

      break;
  }

  return updatePayload;
}
function diffHydratedText(textNode, text) {
  var isDifferent = textNode.nodeValue !== text;
  return isDifferent;
}
function warnForUnmatchedText(textNode, text) {
  {
    warnForTextDifference(textNode.nodeValue, text);
  }
}
function warnForDeletedHydratableElement(parentNode, child) {
  {
    if (didWarnInvalidHydration) {
      return;
    }

    didWarnInvalidHydration = true;
    warningWithoutStack$1(false, 'Did not expect server HTML to contain a <%s> in <%s>.', child.nodeName.toLowerCase(), parentNode.nodeName.toLowerCase());
  }
}
function warnForDeletedHydratableText(parentNode, child) {
  {
    if (didWarnInvalidHydration) {
      return;
    }

    didWarnInvalidHydration = true;
    warningWithoutStack$1(false, 'Did not expect server HTML to contain the text node "%s" in <%s>.', child.nodeValue, parentNode.nodeName.toLowerCase());
  }
}
function warnForInsertedHydratedElement(parentNode, tag, props) {
  {
    if (didWarnInvalidHydration) {
      return;
    }

    didWarnInvalidHydration = true;
    warningWithoutStack$1(false, 'Expected server HTML to contain a matching <%s> in <%s>.', tag, parentNode.nodeName.toLowerCase());
  }
}
function warnForInsertedHydratedText(parentNode, text) {
  {
    if (text === '') {
      // We expect to insert empty text nodes since they're not represented in
      // the HTML.
      // TODO: Remove this special case if we can just avoid inserting empty
      // text nodes.
      return;
    }

    if (didWarnInvalidHydration) {
      return;
    }

    didWarnInvalidHydration = true;
    warningWithoutStack$1(false, 'Expected server HTML to contain a matching text node for "%s" in <%s>.', text, parentNode.nodeName.toLowerCase());
  }
}
function restoreControlledState$$1(domElement, tag, props) {
  switch (tag) {
    case 'input':
      restoreControlledState$1(domElement, props);
      return;

    case 'textarea':
      restoreControlledState$3(domElement, props);
      return;

    case 'select':
      restoreControlledState$2(domElement, props);
      return;
  }
}
function listenToEventResponderEventTypes(eventTypes, element) {
  if (enableFlareAPI) {
    // Get the listening Set for this element. We use this to track
    // what events we're listening to.
    var listeningSet = getListeningSetForElement(element); // Go through each target event type of the event responder

    for (var i = 0, length = eventTypes.length; i < length; ++i) {
      var eventType = eventTypes[i];
      var isPassive = !endsWith(eventType, '_active');
      var eventKey = isPassive ? eventType + '_passive' : eventType;
      var targetEventType = isPassive ? eventType : eventType.substring(0, eventType.length - 7);

      if (!listeningSet.has(eventKey)) {
        trapEventForResponderEventSystem(element, targetEventType, isPassive);
        listeningSet.add(eventKey);
      }
    }
  }
} // We can remove this once the event API is stable and out of a flag

if (enableFlareAPI) {
  setListenToResponderEventTypes(listenToEventResponderEventTypes);
}

function getActiveElement(doc) {
  doc = doc || (typeof document !== 'undefined' ? document : undefined);

  if (typeof doc === 'undefined') {
    return null;
  }

  try {
    return doc.activeElement || doc.body;
  } catch (e) {
    return doc.body;
  }
}

/**
 * Given any node return the first leaf node without children.
 *
 * @param {DOMElement|DOMTextNode} node
 * @return {DOMElement|DOMTextNode}
 */

function getLeafNode(node) {
  while (node && node.firstChild) {
    node = node.firstChild;
  }

  return node;
}
/**
 * Get the next sibling within a container. This will walk up the
 * DOM if a node's siblings have been exhausted.
 *
 * @param {DOMElement|DOMTextNode} node
 * @return {?DOMElement|DOMTextNode}
 */


function getSiblingNode(node) {
  while (node) {
    if (node.nextSibling) {
      return node.nextSibling;
    }

    node = node.parentNode;
  }
}
/**
 * Get object describing the nodes which contain characters at offset.
 *
 * @param {DOMElement|DOMTextNode} root
 * @param {number} offset
 * @return {?object}
 */


function getNodeForCharacterOffset(root, offset) {
  var node = getLeafNode(root);
  var nodeStart = 0;
  var nodeEnd = 0;

  while (node) {
    if (node.nodeType === TEXT_NODE) {
      nodeEnd = nodeStart + node.textContent.length;

      if (nodeStart <= offset && nodeEnd >= offset) {
        return {
          node: node,
          offset: offset - nodeStart
        };
      }

      nodeStart = nodeEnd;
    }

    node = getLeafNode(getSiblingNode(node));
  }
}

/**
 * @param {DOMElement} outerNode
 * @return {?object}
 */

function getOffsets(outerNode) {
  var ownerDocument = outerNode.ownerDocument;
  var win = ownerDocument && ownerDocument.defaultView || window;
  var selection = win.getSelection && win.getSelection();

  if (!selection || selection.rangeCount === 0) {
    return null;
  }

  var anchorNode = selection.anchorNode,
      anchorOffset = selection.anchorOffset,
      focusNode = selection.focusNode,
      focusOffset = selection.focusOffset; // In Firefox, anchorNode and focusNode can be "anonymous divs", e.g. the
  // up/down buttons on an <input type="number">. Anonymous divs do not seem to
  // expose properties, triggering a "Permission denied error" if any of its
  // properties are accessed. The only seemingly possible way to avoid erroring
  // is to access a property that typically works for non-anonymous divs and
  // catch any error that may otherwise arise. See
  // https://bugzilla.mozilla.org/show_bug.cgi?id=208427

  try {
    /* eslint-disable no-unused-expressions */
    anchorNode.nodeType;
    focusNode.nodeType;
    /* eslint-enable no-unused-expressions */
  } catch (e) {
    return null;
  }

  return getModernOffsetsFromPoints(outerNode, anchorNode, anchorOffset, focusNode, focusOffset);
}
/**
 * Returns {start, end} where `start` is the character/codepoint index of
 * (anchorNode, anchorOffset) within the textContent of `outerNode`, and
 * `end` is the index of (focusNode, focusOffset).
 *
 * Returns null if you pass in garbage input but we should probably just crash.
 *
 * Exported only for testing.
 */

function getModernOffsetsFromPoints(outerNode, anchorNode, anchorOffset, focusNode, focusOffset) {
  var length = 0;
  var start = -1;
  var end = -1;
  var indexWithinAnchor = 0;
  var indexWithinFocus = 0;
  var node = outerNode;
  var parentNode = null;

  outer: while (true) {
    var next = null;

    while (true) {
      if (node === anchorNode && (anchorOffset === 0 || node.nodeType === TEXT_NODE)) {
        start = length + anchorOffset;
      }

      if (node === focusNode && (focusOffset === 0 || node.nodeType === TEXT_NODE)) {
        end = length + focusOffset;
      }

      if (node.nodeType === TEXT_NODE) {
        length += node.nodeValue.length;
      }

      if ((next = node.firstChild) === null) {
        break;
      } // Moving from `node` to its first child `next`.


      parentNode = node;
      node = next;
    }

    while (true) {
      if (node === outerNode) {
        // If `outerNode` has children, this is always the second time visiting
        // it. If it has no children, this is still the first loop, and the only
        // valid selection is anchorNode and focusNode both equal to this node
        // and both offsets 0, in which case we will have handled above.
        break outer;
      }

      if (parentNode === anchorNode && ++indexWithinAnchor === anchorOffset) {
        start = length;
      }

      if (parentNode === focusNode && ++indexWithinFocus === focusOffset) {
        end = length;
      }

      if ((next = node.nextSibling) !== null) {
        break;
      }

      node = parentNode;
      parentNode = node.parentNode;
    } // Moving from `node` to its next sibling `next`.


    node = next;
  }

  if (start === -1 || end === -1) {
    // This should never happen. (Would happen if the anchor/focus nodes aren't
    // actually inside the passed-in node.)
    return null;
  }

  return {
    start: start,
    end: end
  };
}
/**
 * In modern non-IE browsers, we can support both forward and backward
 * selections.
 *
 * Note: IE10+ supports the Selection object, but it does not support
 * the `extend` method, which means that even in modern IE, it's not possible
 * to programmatically create a backward selection. Thus, for all IE
 * versions, we use the old IE API to create our selections.
 *
 * @param {DOMElement|DOMTextNode} node
 * @param {object} offsets
 */

function setOffsets(node, offsets) {
  var doc = node.ownerDocument || document;
  var win = doc && doc.defaultView || window; // Edge fails with "Object expected" in some scenarios.
  // (For instance: TinyMCE editor used in a list component that supports pasting to add more,
  // fails when pasting 100+ items)

  if (!win.getSelection) {
    return;
  }

  var selection = win.getSelection();
  var length = node.textContent.length;
  var start = Math.min(offsets.start, length);
  var end = offsets.end === undefined ? start : Math.min(offsets.end, length); // IE 11 uses modern selection, but doesn't support the extend method.
  // Flip backward selections, so we can set with a single range.

  if (!selection.extend && start > end) {
    var temp = end;
    end = start;
    start = temp;
  }

  var startMarker = getNodeForCharacterOffset(node, start);
  var endMarker = getNodeForCharacterOffset(node, end);

  if (startMarker && endMarker) {
    if (selection.rangeCount === 1 && selection.anchorNode === startMarker.node && selection.anchorOffset === startMarker.offset && selection.focusNode === endMarker.node && selection.focusOffset === endMarker.offset) {
      return;
    }

    var range = doc.createRange();
    range.setStart(startMarker.node, startMarker.offset);
    selection.removeAllRanges();

    if (start > end) {
      selection.addRange(range);
      selection.extend(endMarker.node, endMarker.offset);
    } else {
      range.setEnd(endMarker.node, endMarker.offset);
      selection.addRange(range);
    }
  }
}

function isTextNode(node) {
  return node && node.nodeType === TEXT_NODE;
}

function containsNode(outerNode, innerNode) {
  if (!outerNode || !innerNode) {
    return false;
  } else if (outerNode === innerNode) {
    return true;
  } else if (isTextNode(outerNode)) {
    return false;
  } else if (isTextNode(innerNode)) {
    return containsNode(outerNode, innerNode.parentNode);
  } else if ('contains' in outerNode) {
    return outerNode.contains(innerNode);
  } else if (outerNode.compareDocumentPosition) {
    return !!(outerNode.compareDocumentPosition(innerNode) & 16);
  } else {
    return false;
  }
}

function isInDocument(node) {
  return node && node.ownerDocument && containsNode(node.ownerDocument.documentElement, node);
}

function isSameOriginFrame(iframe) {
  try {
    // Accessing the contentDocument of a HTMLIframeElement can cause the browser
    // to throw, e.g. if it has a cross-origin src attribute.
    // Safari will show an error in the console when the access results in "Blocked a frame with origin". e.g:
    // iframe.contentDocument.defaultView;
    // A safety way is to access one of the cross origin properties: Window or Location
    // Which might result in "SecurityError" DOM Exception and it is compatible to Safari.
    // https://html.spec.whatwg.org/multipage/browsers.html#integration-with-idl
    return typeof iframe.contentWindow.location.href === 'string';
  } catch (err) {
    return false;
  }
}

function getActiveElementDeep() {
  var win = window;
  var element = getActiveElement();

  while (element instanceof win.HTMLIFrameElement) {
    if (isSameOriginFrame(element)) {
      win = element.contentWindow;
    } else {
      return element;
    }

    element = getActiveElement(win.document);
  }

  return element;
}
/**
 * @ReactInputSelection: React input selection module. Based on Selection.js,
 * but modified to be suitable for react and has a couple of bug fixes (doesn't
 * assume buttons have range selections allowed).
 * Input selection module for React.
 */

/**
 * @hasSelectionCapabilities: we get the element types that support selection
 * from https://html.spec.whatwg.org/#do-not-apply, looking at `selectionStart`
 * and `selectionEnd` rows.
 */


function hasSelectionCapabilities(elem) {
  var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();
  return nodeName && (nodeName === 'input' && (elem.type === 'text' || elem.type === 'search' || elem.type === 'tel' || elem.type === 'url' || elem.type === 'password') || nodeName === 'textarea' || elem.contentEditable === 'true');
}
function getSelectionInformation() {
  var focusedElem = getActiveElementDeep();
  return {
    focusedElem: focusedElem,
    selectionRange: hasSelectionCapabilities(focusedElem) ? getSelection(focusedElem) : null
  };
}
/**
 * @restoreSelection: If any selection information was potentially lost,
 * restore it. This is useful when performing operations that could remove dom
 * nodes and place them back in, resulting in focus being lost.
 */

function restoreSelection(priorSelectionInformation) {
  var curFocusedElem = getActiveElementDeep();
  var priorFocusedElem = priorSelectionInformation.focusedElem;
  var priorSelectionRange = priorSelectionInformation.selectionRange;

  if (curFocusedElem !== priorFocusedElem && isInDocument(priorFocusedElem)) {
    if (priorSelectionRange !== null && hasSelectionCapabilities(priorFocusedElem)) {
      setSelection(priorFocusedElem, priorSelectionRange);
    } // Focusing a node can change the scroll position, which is undesirable


    var ancestors = [];
    var ancestor = priorFocusedElem;

    while (ancestor = ancestor.parentNode) {
      if (ancestor.nodeType === ELEMENT_NODE) {
        ancestors.push({
          element: ancestor,
          left: ancestor.scrollLeft,
          top: ancestor.scrollTop
        });
      }
    }

    if (typeof priorFocusedElem.focus === 'function') {
      priorFocusedElem.focus();
    }

    for (var i = 0; i < ancestors.length; i++) {
      var info = ancestors[i];
      info.element.scrollLeft = info.left;
      info.element.scrollTop = info.top;
    }
  }
}
/**
 * @getSelection: Gets the selection bounds of a focused textarea, input or
 * contentEditable node.
 * -@input: Look up selection bounds of this input
 * -@return {start: selectionStart, end: selectionEnd}
 */

function getSelection(input) {
  var selection;

  if ('selectionStart' in input) {
    // Modern browser with input or textarea.
    selection = {
      start: input.selectionStart,
      end: input.selectionEnd
    };
  } else {
    // Content editable or old IE textarea.
    selection = getOffsets(input);
  }

  return selection || {
    start: 0,
    end: 0
  };
}
/**
 * @setSelection: Sets the selection bounds of a textarea or input and focuses
 * the input.
 * -@input     Set selection bounds of this input or textarea
 * -@offsets   Object of same form that is returned from get*
 */

function setSelection(input, offsets) {
  var start = offsets.start,
      end = offsets.end;

  if (end === undefined) {
    end = start;
  }

  if ('selectionStart' in input) {
    input.selectionStart = start;
    input.selectionEnd = Math.min(end, input.value.length);
  } else {
    setOffsets(input, offsets);
  }
}

var validateDOMNesting = function () {};

var updatedAncestorInfo = function () {};

{
  // This validation code was written based on the HTML5 parsing spec:
  // https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-scope
  //
  // Note: this does not catch all invalid nesting, nor does it try to (as it's
  // not clear what practical benefit doing so provides); instead, we warn only
  // for cases where the parser will give a parse tree differing from what React
  // intended. For example, <b><div></div></b> is invalid but we don't warn
  // because it still parses correctly; we do warn for other cases like nested
  // <p> tags where the beginning of the second element implicitly closes the
  // first, causing a confusing mess.
  // https://html.spec.whatwg.org/multipage/syntax.html#special
  var specialTags = ['address', 'applet', 'area', 'article', 'aside', 'base', 'basefont', 'bgsound', 'blockquote', 'body', 'br', 'button', 'caption', 'center', 'col', 'colgroup', 'dd', 'details', 'dir', 'div', 'dl', 'dt', 'embed', 'fieldset', 'figcaption', 'figure', 'footer', 'form', 'frame', 'frameset', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'iframe', 'img', 'input', 'isindex', 'li', 'link', 'listing', 'main', 'marquee', 'menu', 'menuitem', 'meta', 'nav', 'noembed', 'noframes', 'noscript', 'object', 'ol', 'p', 'param', 'plaintext', 'pre', 'script', 'section', 'select', 'source', 'style', 'summary', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'title', 'tr', 'track', 'ul', 'wbr', 'xmp']; // https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-scope

  var inScopeTags = ['applet', 'caption', 'html', 'table', 'td', 'th', 'marquee', 'object', 'template', // https://html.spec.whatwg.org/multipage/syntax.html#html-integration-point
  // TODO: Distinguish by namespace here -- for <title>, including it here
  // errs on the side of fewer warnings
  'foreignObject', 'desc', 'title']; // https://html.spec.whatwg.org/multipage/syntax.html#has-an-element-in-button-scope

  var buttonScopeTags = inScopeTags.concat(['button']); // https://html.spec.whatwg.org/multipage/syntax.html#generate-implied-end-tags

  var impliedEndTags = ['dd', 'dt', 'li', 'option', 'optgroup', 'p', 'rp', 'rt'];
  var emptyAncestorInfo = {
    current: null,
    formTag: null,
    aTagInScope: null,
    buttonTagInScope: null,
    nobrTagInScope: null,
    pTagInButtonScope: null,
    listItemTagAutoclosing: null,
    dlItemTagAutoclosing: null
  };

  updatedAncestorInfo = function (oldInfo, tag) {
    var ancestorInfo = _assign({}, oldInfo || emptyAncestorInfo);

    var info = {
      tag: tag
    };

    if (inScopeTags.indexOf(tag) !== -1) {
      ancestorInfo.aTagInScope = null;
      ancestorInfo.buttonTagInScope = null;
      ancestorInfo.nobrTagInScope = null;
    }

    if (buttonScopeTags.indexOf(tag) !== -1) {
      ancestorInfo.pTagInButtonScope = null;
    } // See rules for 'li', 'dd', 'dt' start tags in
    // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inbody


    if (specialTags.indexOf(tag) !== -1 && tag !== 'address' && tag !== 'div' && tag !== 'p') {
      ancestorInfo.listItemTagAutoclosing = null;
      ancestorInfo.dlItemTagAutoclosing = null;
    }

    ancestorInfo.current = info;

    if (tag === 'form') {
      ancestorInfo.formTag = info;
    }

    if (tag === 'a') {
      ancestorInfo.aTagInScope = info;
    }

    if (tag === 'button') {
      ancestorInfo.buttonTagInScope = info;
    }

    if (tag === 'nobr') {
      ancestorInfo.nobrTagInScope = info;
    }

    if (tag === 'p') {
      ancestorInfo.pTagInButtonScope = info;
    }

    if (tag === 'li') {
      ancestorInfo.listItemTagAutoclosing = info;
    }

    if (tag === 'dd' || tag === 'dt') {
      ancestorInfo.dlItemTagAutoclosing = info;
    }

    return ancestorInfo;
  };
  /**
   * Returns whether
   */


  var isTagValidWithParent = function (tag, parentTag) {
    // First, let's check if we're in an unusual parsing mode...
    switch (parentTag) {
      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inselect
      case 'select':
        return tag === 'option' || tag === 'optgroup' || tag === '#text';

      case 'optgroup':
        return tag === 'option' || tag === '#text';
      // Strictly speaking, seeing an <option> doesn't mean we're in a <select>
      // but

      case 'option':
        return tag === '#text';
      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intd
      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-incaption
      // No special behavior since these rules fall back to "in body" mode for
      // all except special table nodes which cause bad parsing behavior anyway.
      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intr

      case 'tr':
        return tag === 'th' || tag === 'td' || tag === 'style' || tag === 'script' || tag === 'template';
      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intbody

      case 'tbody':
      case 'thead':
      case 'tfoot':
        return tag === 'tr' || tag === 'style' || tag === 'script' || tag === 'template';
      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-incolgroup

      case 'colgroup':
        return tag === 'col' || tag === 'template';
      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-intable

      case 'table':
        return tag === 'caption' || tag === 'colgroup' || tag === 'tbody' || tag === 'tfoot' || tag === 'thead' || tag === 'style' || tag === 'script' || tag === 'template';
      // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inhead

      case 'head':
        return tag === 'base' || tag === 'basefont' || tag === 'bgsound' || tag === 'link' || tag === 'meta' || tag === 'title' || tag === 'noscript' || tag === 'noframes' || tag === 'style' || tag === 'script' || tag === 'template';
      // https://html.spec.whatwg.org/multipage/semantics.html#the-html-element

      case 'html':
        return tag === 'head' || tag === 'body' || tag === 'frameset';

      case 'frameset':
        return tag === 'frame';

      case '#document':
        return tag === 'html';
    } // Probably in the "in body" parsing mode, so we outlaw only tag combos
    // where the parsing rules cause implicit opens or closes to be added.
    // https://html.spec.whatwg.org/multipage/syntax.html#parsing-main-inbody


    switch (tag) {
      case 'h1':
      case 'h2':
      case 'h3':
      case 'h4':
      case 'h5':
      case 'h6':
        return parentTag !== 'h1' && parentTag !== 'h2' && parentTag !== 'h3' && parentTag !== 'h4' && parentTag !== 'h5' && parentTag !== 'h6';

      case 'rp':
      case 'rt':
        return impliedEndTags.indexOf(parentTag) === -1;

      case 'body':
      case 'caption':
      case 'col':
      case 'colgroup':
      case 'frameset':
      case 'frame':
      case 'head':
      case 'html':
      case 'tbody':
      case 'td':
      case 'tfoot':
      case 'th':
      case 'thead':
      case 'tr':
        // These tags are only valid with a few parents that have special child
        // parsing rules -- if we're down here, then none of those matched and
        // so we allow it only if we don't know what the parent is, as all other
        // cases are invalid.
        return parentTag == null;
    }

    return true;
  };
  /**
   * Returns whether
   */


  var findInvalidAncestorForTag = function (tag, ancestorInfo) {
    switch (tag) {
      case 'address':
      case 'article':
      case 'aside':
      case 'blockquote':
      case 'center':
      case 'details':
      case 'dialog':
      case 'dir':
      case 'div':
      case 'dl':
      case 'fieldset':
      case 'figcaption':
      case 'figure':
      case 'footer':
      case 'header':
      case 'hgroup':
      case 'main':
      case 'menu':
      case 'nav':
      case 'ol':
      case 'p':
      case 'section':
      case 'summary':
      case 'ul':
      case 'pre':
      case 'listing':
      case 'table':
      case 'hr':
      case 'xmp':
      case 'h1':
      case 'h2':
      case 'h3':
      case 'h4':
      case 'h5':
      case 'h6':
        return ancestorInfo.pTagInButtonScope;

      case 'form':
        return ancestorInfo.formTag || ancestorInfo.pTagInButtonScope;

      case 'li':
        return ancestorInfo.listItemTagAutoclosing;

      case 'dd':
      case 'dt':
        return ancestorInfo.dlItemTagAutoclosing;

      case 'button':
        return ancestorInfo.buttonTagInScope;

      case 'a':
        // Spec says something about storing a list of markers, but it sounds
        // equivalent to this check.
        return ancestorInfo.aTagInScope;

      case 'nobr':
        return ancestorInfo.nobrTagInScope;
    }

    return null;
  };

  var didWarn$1 = {};

  validateDOMNesting = function (childTag, childText, ancestorInfo) {
    ancestorInfo = ancestorInfo || emptyAncestorInfo;
    var parentInfo = ancestorInfo.current;
    var parentTag = parentInfo && parentInfo.tag;

    if (childText != null) {
      !(childTag == null) ? warningWithoutStack$1(false, 'validateDOMNesting: when childText is passed, childTag should be null') : void 0;
      childTag = '#text';
    }

    var invalidParent = isTagValidWithParent(childTag, parentTag) ? null : parentInfo;
    var invalidAncestor = invalidParent ? null : findInvalidAncestorForTag(childTag, ancestorInfo);
    var invalidParentOrAncestor = invalidParent || invalidAncestor;

    if (!invalidParentOrAncestor) {
      return;
    }

    var ancestorTag = invalidParentOrAncestor.tag;
    var addendum = getCurrentFiberStackInDev();
    var warnKey = !!invalidParent + '|' + childTag + '|' + ancestorTag + '|' + addendum;

    if (didWarn$1[warnKey]) {
      return;
    }

    didWarn$1[warnKey] = true;
    var tagDisplayName = childTag;
    var whitespaceInfo = '';

    if (childTag === '#text') {
      if (/\S/.test(childText)) {
        tagDisplayName = 'Text nodes';
      } else {
        tagDisplayName = 'Whitespace text nodes';
        whitespaceInfo = " Make sure you don't have any extra whitespace between tags on " + 'each line of your source code.';
      }
    } else {
      tagDisplayName = '<' + childTag + '>';
    }

    if (invalidParent) {
      var info = '';

      if (ancestorTag === 'table' && childTag === 'tr') {
        info += ' Add a <tbody>, <thead> or <tfoot> to your code to match the DOM tree generated by ' + 'the browser.';
      }

      warningWithoutStack$1(false, 'validateDOMNesting(...): %s cannot appear as a child of <%s>.%s%s%s', tagDisplayName, ancestorTag, whitespaceInfo, info, addendum);
    } else {
      warningWithoutStack$1(false, 'validateDOMNesting(...): %s cannot appear as a descendant of ' + '<%s>.%s', tagDisplayName, ancestorTag, addendum);
    }
  };
}

// can re-export everything from this module.

function shim() {
  {
    {
      throw Error("The current renderer does not support persistence. This error is likely caused by a bug in React. Please file an issue.");
    }
  }
} // Persistence (when unsupported)


var supportsPersistence = false;
var cloneInstance = shim;
var cloneFundamentalInstance = shim;
var createContainerChildSet = shim;
var appendChildToContainerChildSet = shim;
var finalizeContainerChildren = shim;
var replaceContainerChildren = shim;
var cloneHiddenInstance = shim;
var cloneHiddenTextInstance = shim;

var SUPPRESS_HYDRATION_WARNING;

{
  SUPPRESS_HYDRATION_WARNING = 'suppressHydrationWarning';
}

var SUSPENSE_START_DATA = '$';
var SUSPENSE_END_DATA = '/$';
var SUSPENSE_PENDING_START_DATA = '$?';
var SUSPENSE_FALLBACK_START_DATA = '$!';
var STYLE = 'style';
var eventsEnabled = null;
var selectionInformation = null;

function shouldAutoFocusHostComponent(type, props) {
  switch (type) {
    case 'button':
    case 'input':
    case 'select':
    case 'textarea':
      return !!props.autoFocus;
  }

  return false;
}

function getRootHostContext(rootContainerInstance) {
  var type;
  var namespace;
  var nodeType = rootContainerInstance.nodeType;

  switch (nodeType) {
    case DOCUMENT_NODE:
    case DOCUMENT_FRAGMENT_NODE:
      {
        type = nodeType === DOCUMENT_NODE ? '#document' : '#fragment';
        var root = rootContainerInstance.documentElement;
        namespace = root ? root.namespaceURI : getChildNamespace(null, '');
        break;
      }

    default:
      {
        var container = nodeType === COMMENT_NODE ? rootContainerInstance.parentNode : rootContainerInstance;
        var ownNamespace = container.namespaceURI || null;
        type = container.tagName;
        namespace = getChildNamespace(ownNamespace, type);
        break;
      }
  }

  {
    var validatedTag = type.toLowerCase();
    var ancestorInfo = updatedAncestorInfo(null, validatedTag);
    return {
      namespace: namespace,
      ancestorInfo: ancestorInfo
    };
  }

  return namespace;
}
function getChildHostContext(parentHostContext, type, rootContainerInstance) {
  {
    var parentHostContextDev = parentHostContext;
    var namespace = getChildNamespace(parentHostContextDev.namespace, type);
    var ancestorInfo = updatedAncestorInfo(parentHostContextDev.ancestorInfo, type);
    return {
      namespace: namespace,
      ancestorInfo: ancestorInfo
    };
  }

  var parentNamespace = parentHostContext;
  return getChildNamespace(parentNamespace, type);
}
function getPublicInstance(instance) {
  return instance;
}
function prepareForCommit(containerInfo) {
  eventsEnabled = isEnabled();
  selectionInformation = getSelectionInformation();
  setEnabled(false);
}
function resetAfterCommit(containerInfo) {
  restoreSelection(selectionInformation);
  selectionInformation = null;
  setEnabled(eventsEnabled);
  eventsEnabled = null;
}
function createInstance(type, props, rootContainerInstance, hostContext, internalInstanceHandle) {
  var parentNamespace;

  {
    // TODO: take namespace into account when validating.
    var hostContextDev = hostContext;
    validateDOMNesting(type, null, hostContextDev.ancestorInfo);

    if (typeof props.children === 'string' || typeof props.children === 'number') {
      var string = '' + props.children;
      var ownAncestorInfo = updatedAncestorInfo(hostContextDev.ancestorInfo, type);
      validateDOMNesting(null, string, ownAncestorInfo);
    }

    parentNamespace = hostContextDev.namespace;
  }

  var domElement = createElement(type, props, rootContainerInstance, parentNamespace);
  precacheFiberNode(internalInstanceHandle, domElement);
  updateFiberProps(domElement, props);
  return domElement;
}
function appendInitialChild(parentInstance, child) {
  parentInstance.appendChild(child);
}
function finalizeInitialChildren(domElement, type, props, rootContainerInstance, hostContext) {
  setInitialProperties(domElement, type, props, rootContainerInstance);
  return shouldAutoFocusHostComponent(type, props);
}
function prepareUpdate(domElement, type, oldProps, newProps, rootContainerInstance, hostContext) {
  {
    var hostContextDev = hostContext;

    if (typeof newProps.children !== typeof oldProps.children && (typeof newProps.children === 'string' || typeof newProps.children === 'number')) {
      var string = '' + newProps.children;
      var ownAncestorInfo = updatedAncestorInfo(hostContextDev.ancestorInfo, type);
      validateDOMNesting(null, string, ownAncestorInfo);
    }
  }

  return diffProperties(domElement, type, oldProps, newProps, rootContainerInstance);
}
function shouldSetTextContent(type, props) {
  return type === 'textarea' || type === 'option' || type === 'noscript' || typeof props.children === 'string' || typeof props.children === 'number' || typeof props.dangerouslySetInnerHTML === 'object' && props.dangerouslySetInnerHTML !== null && props.dangerouslySetInnerHTML.__html != null;
}
function shouldDeprioritizeSubtree(type, props) {
  return !!props.hidden;
}
function createTextInstance(text, rootContainerInstance, hostContext, internalInstanceHandle) {
  {
    var hostContextDev = hostContext;
    validateDOMNesting(null, text, hostContextDev.ancestorInfo);
  }

  var textNode = createTextNode(text, rootContainerInstance);
  precacheFiberNode(internalInstanceHandle, textNode);
  return textNode;
}
var isPrimaryRenderer = true;
var warnsIfNotActing = true; // This initialization code may run even on server environments
// if a component just imports ReactDOM (e.g. for findDOMNode).
// Some environments might not have setTimeout or clearTimeout.

var scheduleTimeout = typeof setTimeout === 'function' ? setTimeout : undefined;
var cancelTimeout = typeof clearTimeout === 'function' ? clearTimeout : undefined;
var noTimeout = -1; // -------------------
//     Mutation
// -------------------

var supportsMutation = true;
function commitMount(domElement, type, newProps, internalInstanceHandle) {
  // Despite the naming that might imply otherwise, this method only
  // fires if there is an `Update` effect scheduled during mounting.
  // This happens if `finalizeInitialChildren` returns `true` (which it
  // does to implement the `autoFocus` attribute on the client). But
  // there are also other cases when this might happen (such as patching
  // up text content during hydration mismatch). So we'll check this again.
  if (shouldAutoFocusHostComponent(type, newProps)) {
    domElement.focus();
  }
}
function commitUpdate(domElement, updatePayload, type, oldProps, newProps, internalInstanceHandle) {
  // Update the props handle so that we know which props are the ones with
  // with current event handlers.
  updateFiberProps(domElement, newProps); // Apply the diff to the DOM node.

  updateProperties(domElement, updatePayload, type, oldProps, newProps);
}
function resetTextContent(domElement) {
  setTextContent(domElement, '');
}
function commitTextUpdate(textInstance, oldText, newText) {
  textInstance.nodeValue = newText;
}
function appendChild(parentInstance, child) {
  parentInstance.appendChild(child);
}
function appendChildToContainer(container, child) {
  var parentNode;

  if (container.nodeType === COMMENT_NODE) {
    parentNode = container.parentNode;
    parentNode.insertBefore(child, container);
  } else {
    parentNode = container;
    parentNode.appendChild(child);
  } // This container might be used for a portal.
  // If something inside a portal is clicked, that click should bubble
  // through the React tree. However, on Mobile Safari the click would
  // never bubble through the *DOM* tree unless an ancestor with onclick
  // event exists. So we wouldn't see it and dispatch it.
  // This is why we ensure that non React root containers have inline onclick
  // defined.
  // https://github.com/facebook/react/issues/11918


  var reactRootContainer = container._reactRootContainer;

  if ((reactRootContainer === null || reactRootContainer === undefined) && parentNode.onclick === null) {
    // TODO: This cast may not be sound for SVG, MathML or custom elements.
    trapClickOnNonInteractiveElement(parentNode);
  }
}
function insertBefore(parentInstance, child, beforeChild) {
  parentInstance.insertBefore(child, beforeChild);
}
function insertInContainerBefore(container, child, beforeChild) {
  if (container.nodeType === COMMENT_NODE) {
    container.parentNode.insertBefore(child, beforeChild);
  } else {
    container.insertBefore(child, beforeChild);
  }
}
function removeChild(parentInstance, child) {
  parentInstance.removeChild(child);
}
function removeChildFromContainer(container, child) {
  if (container.nodeType === COMMENT_NODE) {
    container.parentNode.removeChild(child);
  } else {
    container.removeChild(child);
  }
}
function clearSuspenseBoundary(parentInstance, suspenseInstance) {
  var node = suspenseInstance; // Delete all nodes within this suspense boundary.
  // There might be nested nodes so we need to keep track of how
  // deep we are and only break out when we're back on top.

  var depth = 0;

  do {
    var nextNode = node.nextSibling;
    parentInstance.removeChild(node);

    if (nextNode && nextNode.nodeType === COMMENT_NODE) {
      var data = nextNode.data;

      if (data === SUSPENSE_END_DATA) {
        if (depth === 0) {
          parentInstance.removeChild(nextNode); // Retry if any event replaying was blocked on this.

          retryIfBlockedOn(suspenseInstance);
          return;
        } else {
          depth--;
        }
      } else if (data === SUSPENSE_START_DATA || data === SUSPENSE_PENDING_START_DATA || data === SUSPENSE_FALLBACK_START_DATA) {
        depth++;
      }
    }

    node = nextNode;
  } while (node); // TODO: Warn, we didn't find the end comment boundary.
  // Retry if any event replaying was blocked on this.


  retryIfBlockedOn(suspenseInstance);
}
function clearSuspenseBoundaryFromContainer(container, suspenseInstance) {
  if (container.nodeType === COMMENT_NODE) {
    clearSuspenseBoundary(container.parentNode, suspenseInstance);
  } else if (container.nodeType === ELEMENT_NODE) {
    clearSuspenseBoundary(container, suspenseInstance);
  } else {} // Document nodes should never contain suspense boundaries.
  // Retry if any event replaying was blocked on this.


  retryIfBlockedOn(container);
}
function hideInstance(instance) {
  // TODO: Does this work for all element types? What about MathML? Should we
  // pass host context to this method?
  instance = instance;
  var style = instance.style;

  if (typeof style.setProperty === 'function') {
    style.setProperty('display', 'none', 'important');
  } else {
    style.display = 'none';
  }
}
function hideTextInstance(textInstance) {
  textInstance.nodeValue = '';
}
function unhideInstance(instance, props) {
  instance = instance;
  var styleProp = props[STYLE];
  var display = styleProp !== undefined && styleProp !== null && styleProp.hasOwnProperty('display') ? styleProp.display : null;
  instance.style.display = dangerousStyleValue('display', display);
}
function unhideTextInstance(textInstance, text) {
  textInstance.nodeValue = text;
} // -------------------
//     Hydration
// -------------------

var supportsHydration = true;
function canHydrateInstance(instance, type, props) {
  if (instance.nodeType !== ELEMENT_NODE || type.toLowerCase() !== instance.nodeName.toLowerCase()) {
    return null;
  } // This has now been refined to an element node.


  return instance;
}
function canHydrateTextInstance(instance, text) {
  if (text === '' || instance.nodeType !== TEXT_NODE) {
    // Empty strings are not parsed by HTML so there won't be a correct match here.
    return null;
  } // This has now been refined to a text node.


  return instance;
}
function canHydrateSuspenseInstance(instance) {
  if (instance.nodeType !== COMMENT_NODE) {
    // Empty strings are not parsed by HTML so there won't be a correct match here.
    return null;
  } // This has now been refined to a suspense node.


  return instance;
}
function isSuspenseInstancePending(instance) {
  return instance.data === SUSPENSE_PENDING_START_DATA;
}
function isSuspenseInstanceFallback(instance) {
  return instance.data === SUSPENSE_FALLBACK_START_DATA;
}
function registerSuspenseInstanceRetry(instance, callback) {
  instance._reactRetry = callback;
}

function getNextHydratable(node) {
  // Skip non-hydratable nodes.
  for (; node != null; node = node.nextSibling) {
    var nodeType = node.nodeType;

    if (nodeType === ELEMENT_NODE || nodeType === TEXT_NODE) {
      break;
    }

    if (enableSuspenseServerRenderer) {
      if (nodeType === COMMENT_NODE) {
        var nodeData = node.data;

        if (nodeData === SUSPENSE_START_DATA || nodeData === SUSPENSE_FALLBACK_START_DATA || nodeData === SUSPENSE_PENDING_START_DATA) {
          break;
        }
      }
    }
  }

  return node;
}

function getNextHydratableSibling(instance) {
  return getNextHydratable(instance.nextSibling);
}
function getFirstHydratableChild(parentInstance) {
  return getNextHydratable(parentInstance.firstChild);
}
function hydrateInstance(instance, type, props, rootContainerInstance, hostContext, internalInstanceHandle) {
  precacheFiberNode(internalInstanceHandle, instance); // TODO: Possibly defer this until the commit phase where all the events
  // get attached.

  updateFiberProps(instance, props);
  var parentNamespace;

  {
    var hostContextDev = hostContext;
    parentNamespace = hostContextDev.namespace;
  }

  return diffHydratedProperties(instance, type, props, parentNamespace, rootContainerInstance);
}
function hydrateTextInstance(textInstance, text, internalInstanceHandle) {
  precacheFiberNode(internalInstanceHandle, textInstance);
  return diffHydratedText(textInstance, text);
}
function hydrateSuspenseInstance(suspenseInstance, internalInstanceHandle) {
  precacheFiberNode(internalInstanceHandle, suspenseInstance);
}
function getNextHydratableInstanceAfterSuspenseInstance(suspenseInstance) {
  var node = suspenseInstance.nextSibling; // Skip past all nodes within this suspense boundary.
  // There might be nested nodes so we need to keep track of how
  // deep we are and only break out when we're back on top.

  var depth = 0;

  while (node) {
    if (node.nodeType === COMMENT_NODE) {
      var data = node.data;

      if (data === SUSPENSE_END_DATA) {
        if (depth === 0) {
          return getNextHydratableSibling(node);
        } else {
          depth--;
        }
      } else if (data === SUSPENSE_START_DATA || data === SUSPENSE_FALLBACK_START_DATA || data === SUSPENSE_PENDING_START_DATA) {
        depth++;
      }
    }

    node = node.nextSibling;
  } // TODO: Warn, we didn't find the end comment boundary.


  return null;
} // Returns the SuspenseInstance if this node is a direct child of a
// SuspenseInstance. I.e. if its previous sibling is a Comment with
// SUSPENSE_x_START_DATA. Otherwise, null.

function getParentSuspenseInstance(targetInstance) {
  var node = targetInstance.previousSibling; // Skip past all nodes within this suspense boundary.
  // There might be nested nodes so we need to keep track of how
  // deep we are and only break out when we're back on top.

  var depth = 0;

  while (node) {
    if (node.nodeType === COMMENT_NODE) {
      var data = node.data;

      if (data === SUSPENSE_START_DATA || data === SUSPENSE_FALLBACK_START_DATA || data === SUSPENSE_PENDING_START_DATA) {
        if (depth === 0) {
          return node;
        } else {
          depth--;
        }
      } else if (data === SUSPENSE_END_DATA) {
        depth++;
      }
    }

    node = node.previousSibling;
  }

  return null;
}
function commitHydratedContainer(container) {
  // Retry if any event replaying was blocked on this.
  retryIfBlockedOn(container);
}
function commitHydratedSuspenseInstance(suspenseInstance) {
  // Retry if any event replaying was blocked on this.
  retryIfBlockedOn(suspenseInstance);
}
function didNotMatchHydratedContainerTextInstance(parentContainer, textInstance, text) {
  {
    warnForUnmatchedText(textInstance, text);
  }
}
function didNotMatchHydratedTextInstance(parentType, parentProps, parentInstance, textInstance, text) {
  if (true && parentProps[SUPPRESS_HYDRATION_WARNING] !== true) {
    warnForUnmatchedText(textInstance, text);
  }
}
function didNotHydrateContainerInstance(parentContainer, instance) {
  {
    if (instance.nodeType === ELEMENT_NODE) {
      warnForDeletedHydratableElement(parentContainer, instance);
    } else if (instance.nodeType === COMMENT_NODE) {// TODO: warnForDeletedHydratableSuspenseBoundary
    } else {
      warnForDeletedHydratableText(parentContainer, instance);
    }
  }
}
function didNotHydrateInstance(parentType, parentProps, parentInstance, instance) {
  if (true && parentProps[SUPPRESS_HYDRATION_WARNING] !== true) {
    if (instance.nodeType === ELEMENT_NODE) {
      warnForDeletedHydratableElement(parentInstance, instance);
    } else if (instance.nodeType === COMMENT_NODE) {// TODO: warnForDeletedHydratableSuspenseBoundary
    } else {
      warnForDeletedHydratableText(parentInstance, instance);
    }
  }
}
function didNotFindHydratableContainerInstance(parentContainer, type, props) {
  {
    warnForInsertedHydratedElement(parentContainer, type, props);
  }
}
function didNotFindHydratableContainerTextInstance(parentContainer, text) {
  {
    warnForInsertedHydratedText(parentContainer, text);
  }
}

function didNotFindHydratableInstance(parentType, parentProps, parentInstance, type, props) {
  if (true && parentProps[SUPPRESS_HYDRATION_WARNING] !== true) {
    warnForInsertedHydratedElement(parentInstance, type, props);
  }
}
function didNotFindHydratableTextInstance(parentType, parentProps, parentInstance, text) {
  if (true && parentProps[SUPPRESS_HYDRATION_WARNING] !== true) {
    warnForInsertedHydratedText(parentInstance, text);
  }
}
function didNotFindHydratableSuspenseInstance(parentType, parentProps, parentInstance) {
  if (true && parentProps[SUPPRESS_HYDRATION_WARNING] !== true) {// TODO: warnForInsertedHydratedSuspense(parentInstance);
  }
}
function mountResponderInstance(responder, responderInstance, responderProps, responderState, instance) {
  // Listen to events
  var doc = instance.ownerDocument;
  var _ref = responder,
      rootEventTypes = _ref.rootEventTypes,
      targetEventTypes = _ref.targetEventTypes;

  if (targetEventTypes !== null) {
    listenToEventResponderEventTypes(targetEventTypes, doc);
  }

  if (rootEventTypes !== null) {
    addRootEventTypesForResponderInstance(responderInstance, rootEventTypes);
    listenToEventResponderEventTypes(rootEventTypes, doc);
  }

  mountEventResponder(responder, responderInstance, responderProps, responderState);
  return responderInstance;
}
function unmountResponderInstance(responderInstance) {
  if (enableFlareAPI) {
    // TODO stop listening to targetEventTypes
    unmountEventResponder(responderInstance);
  }
}
function getFundamentalComponentInstance(fundamentalInstance) {
  if (enableFundamentalAPI) {
    var currentFiber = fundamentalInstance.currentFiber,
        impl = fundamentalInstance.impl,
        props = fundamentalInstance.props,
        state = fundamentalInstance.state;
    var instance = impl.getInstance(null, props, state);
    precacheFiberNode(currentFiber, instance);
    return instance;
  } // Because of the flag above, this gets around the Flow error;


  return null;
}
function mountFundamentalComponent(fundamentalInstance) {
  if (enableFundamentalAPI) {
    var impl = fundamentalInstance.impl,
        instance = fundamentalInstance.instance,
        props = fundamentalInstance.props,
        state = fundamentalInstance.state;
    var onMount = impl.onMount;

    if (onMount !== undefined) {
      onMount(null, instance, props, state);
    }
  }
}
function shouldUpdateFundamentalComponent(fundamentalInstance) {
  if (enableFundamentalAPI) {
    var impl = fundamentalInstance.impl,
        prevProps = fundamentalInstance.prevProps,
        props = fundamentalInstance.props,
        state = fundamentalInstance.state;
    var shouldUpdate = impl.shouldUpdate;

    if (shouldUpdate !== undefined) {
      return shouldUpdate(null, prevProps, props, state);
    }
  }

  return true;
}
function updateFundamentalComponent(fundamentalInstance) {
  if (enableFundamentalAPI) {
    var impl = fundamentalInstance.impl,
        instance = fundamentalInstance.instance,
        prevProps = fundamentalInstance.prevProps,
        props = fundamentalInstance.props,
        state = fundamentalInstance.state;
    var onUpdate = impl.onUpdate;

    if (onUpdate !== undefined) {
      onUpdate(null, instance, prevProps, props, state);
    }
  }
}
function unmountFundamentalComponent(fundamentalInstance) {
  if (enableFundamentalAPI) {
    var impl = fundamentalInstance.impl,
        instance = fundamentalInstance.instance,
        props = fundamentalInstance.props,
        state = fundamentalInstance.state;
    var onUnmount = impl.onUnmount;

    if (onUnmount !== undefined) {
      onUnmount(null, instance, props, state);
    }
  }
}
function getInstanceFromNode$2(node) {
  return getClosestInstanceFromNode(node) || null;
}

var randomKey = Math.random().toString(36).slice(2);
var internalInstanceKey = '__reactInternalInstance$' + randomKey;
var internalEventHandlersKey = '__reactEventHandlers$' + randomKey;
var internalContainerInstanceKey = '__reactContainere$' + randomKey;
function precacheFiberNode(hostInst, node) {
  node[internalInstanceKey] = hostInst;
}
function markContainerAsRoot(hostRoot, node) {
  node[internalContainerInstanceKey] = hostRoot;
} // Given a DOM node, return the closest HostComponent or HostText fiber ancestor.
// If the target node is part of a hydrated or not yet rendered subtree, then
// this may also return a SuspenseComponent or HostRoot to indicate that.
// Conceptually the HostRoot fiber is a child of the Container node. So if you
// pass the Container node as the targetNode, you wiill not actually get the
// HostRoot back. To get to the HostRoot, you need to pass a child of it.
// The same thing applies to Suspense boundaries.

function getClosestInstanceFromNode(targetNode) {
  var targetInst = targetNode[internalInstanceKey];

  if (targetInst) {
    // Don't return HostRoot or SuspenseComponent here.
    return targetInst;
  } // If the direct event target isn't a React owned DOM node, we need to look
  // to see if one of its parents is a React owned DOM node.


  var parentNode = targetNode.parentNode;

  while (parentNode) {
    // We'll check if this is a container root that could include
    // React nodes in the future. We need to check this first because
    // if we're a child of a dehydrated container, we need to first
    // find that inner container before moving on to finding the parent
    // instance. Note that we don't check this field on  the targetNode
    // itself because the fibers are conceptually between the container
    // node and the first child. It isn't surrounding the container node.
    // If it's not a container, we check if it's an instance.
    targetInst = parentNode[internalContainerInstanceKey] || parentNode[internalInstanceKey];

    if (targetInst) {
      // Since this wasn't the direct target of the event, we might have
      // stepped past dehydrated DOM nodes to get here. However they could
      // also have been non-React nodes. We need to answer which one.
      // If we the instance doesn't have any children, then there can't be
      // a nested suspense boundary within it. So we can use this as a fast
      // bailout. Most of the time, when people add non-React children to
      // the tree, it is using a ref to a child-less DOM node.
      // Normally we'd only need to check one of the fibers because if it
      // has ever gone from having children to deleting them or vice versa
      // it would have deleted the dehydrated boundary nested inside already.
      // However, since the HostRoot starts out with an alternate it might
      // have one on the alternate so we need to check in case this was a
      // root.
      var alternate = targetInst.alternate;

      if (targetInst.child !== null || alternate !== null && alternate.child !== null) {
        // Next we need to figure out if the node that skipped past is
        // nested within a dehydrated boundary and if so, which one.
        var suspenseInstance = getParentSuspenseInstance(targetNode);

        while (suspenseInstance !== null) {
          // We found a suspense instance. That means that we haven't
          // hydrated it yet. Even though we leave the comments in the
          // DOM after hydrating, and there are boundaries in the DOM
          // that could already be hydrated, we wouldn't have found them
          // through this pass since if the target is hydrated it would
          // have had an internalInstanceKey on it.
          // Let's get the fiber associated with the SuspenseComponent
          // as the deepest instance.
          var targetSuspenseInst = suspenseInstance[internalInstanceKey];

          if (targetSuspenseInst) {
            return targetSuspenseInst;
          } // If we don't find a Fiber on the comment, it might be because
          // we haven't gotten to hydrate it yet. There might still be a
          // parent boundary that hasn't above this one so we need to find
          // the outer most that is known.


          suspenseInstance = getParentSuspenseInstance(suspenseInstance); // If we don't find one, then that should mean that the parent
          // host component also hasn't hydrated yet. We can return it
          // below since it will bail out on the isMounted check later.
        }
      }

      return targetInst;
    }

    targetNode = parentNode;
    parentNode = targetNode.parentNode;
  }

  return null;
}
/**
 * Given a DOM node, return the ReactDOMComponent or ReactDOMTextComponent
 * instance, or null if the node was not rendered by this React.
 */

function getInstanceFromNode$1(node) {
  var inst = node[internalInstanceKey] || node[internalContainerInstanceKey];

  if (inst) {
    if (inst.tag === HostComponent || inst.tag === HostText || inst.tag === SuspenseComponent || inst.tag === HostRoot) {
      return inst;
    } else {
      return null;
    }
  }

  return null;
}
/**
 * Given a ReactDOMComponent or ReactDOMTextComponent, return the corresponding
 * DOM node.
 */

function getNodeFromInstance$1(inst) {
  if (inst.tag === HostComponent || inst.tag === HostText) {
    // In Fiber this, is just the state node right now. We assume it will be
    // a host component or host text.
    return inst.stateNode;
  } // Without this first invariant, passing a non-DOM-component triggers the next
  // invariant for a missing parent, which is super confusing.


  {
    {
      throw Error("getNodeFromInstance: Invalid argument.");
    }
  }
}
function getFiberCurrentPropsFromNode$1(node) {
  return node[internalEventHandlersKey] || null;
}
function updateFiberProps(node, props) {
  node[internalEventHandlersKey] = props;
}

/**
 * These variables store information about text content of a target node,
 * allowing comparison of content before and after a given event.
 *
 * Identify the node where selection currently begins, then observe
 * both its text content and its current position in the DOM. Since the
 * browser may natively replace the target node during composition, we can
 * use its position to find its replacement.
 *
 *
 */
var root = null;
var startText = null;
var fallbackText = null;
function initialize(nativeEventTarget) {
  root = nativeEventTarget;
  startText = getText();
  return true;
}
function reset() {
  root = null;
  startText = null;
  fallbackText = null;
}
function getData() {
  if (fallbackText) {
    return fallbackText;
  }

  var start;
  var startValue = startText;
  var startLength = startValue.length;
  var end;
  var endValue = getText();
  var endLength = endValue.length;

  for (start = 0; start < startLength; start++) {
    if (startValue[start] !== endValue[start]) {
      break;
    }
  }

  var minEnd = startLength - start;

  for (end = 1; end <= minEnd; end++) {
    if (startValue[startLength - end] !== endValue[endLength - end]) {
      break;
    }
  }

  var sliceTail = end > 1 ? 1 - end : undefined;
  fallbackText = endValue.slice(start, sliceTail);
  return fallbackText;
}
function getText() {
  if ('value' in root) {
    return root.value;
  }

  return root.textContent;
}

/**
 * @interface Event
 * @see http://www.w3.org/TR/DOM-Level-3-Events/#events-compositionevents
 */

var SyntheticCompositionEvent = SyntheticEvent.extend({
  data: null
});

/**
 * @interface Event
 * @see http://www.w3.org/TR/2013/WD-DOM-Level-3-Events-20131105
 *      /#events-inputevents
 */

var SyntheticInputEvent = SyntheticEvent.extend({
  data: null
});

var END_KEYCODES = [9, 13, 27, 32]; // Tab, Return, Esc, Space

var START_KEYCODE = 229;
var canUseCompositionEvent = canUseDOM && 'CompositionEvent' in window;
var documentMode = null;

if (canUseDOM && 'documentMode' in document) {
  documentMode = document.documentMode;
} // Webkit offers a very useful `textInput` event that can be used to
// directly represent `beforeInput`. The IE `textinput` event is not as
// useful, so we don't use it.


var canUseTextInputEvent = canUseDOM && 'TextEvent' in window && !documentMode; // In IE9+, we have access to composition events, but the data supplied
// by the native compositionend event may be incorrect. Japanese ideographic
// spaces, for instance (\u3000) are not recorded correctly.

var useFallbackCompositionData = canUseDOM && (!canUseCompositionEvent || documentMode && documentMode > 8 && documentMode <= 11);
var SPACEBAR_CODE = 32;
var SPACEBAR_CHAR = String.fromCharCode(SPACEBAR_CODE); // Events and their corresponding property names.

var eventTypes$1 = {
  beforeInput: {
    phasedRegistrationNames: {
      bubbled: 'onBeforeInput',
      captured: 'onBeforeInputCapture'
    },
    dependencies: [TOP_COMPOSITION_END, TOP_KEY_PRESS, TOP_TEXT_INPUT, TOP_PASTE]
  },
  compositionEnd: {
    phasedRegistrationNames: {
      bubbled: 'onCompositionEnd',
      captured: 'onCompositionEndCapture'
    },
    dependencies: [TOP_BLUR, TOP_COMPOSITION_END, TOP_KEY_DOWN, TOP_KEY_PRESS, TOP_KEY_UP, TOP_MOUSE_DOWN]
  },
  compositionStart: {
    phasedRegistrationNames: {
      bubbled: 'onCompositionStart',
      captured: 'onCompositionStartCapture'
    },
    dependencies: [TOP_BLUR, TOP_COMPOSITION_START, TOP_KEY_DOWN, TOP_KEY_PRESS, TOP_KEY_UP, TOP_MOUSE_DOWN]
  },
  compositionUpdate: {
    phasedRegistrationNames: {
      bubbled: 'onCompositionUpdate',
      captured: 'onCompositionUpdateCapture'
    },
    dependencies: [TOP_BLUR, TOP_COMPOSITION_UPDATE, TOP_KEY_DOWN, TOP_KEY_PRESS, TOP_KEY_UP, TOP_MOUSE_DOWN]
  }
}; // Track whether we've ever handled a keypress on the space key.

var hasSpaceKeypress = false;
/**
 * Return whether a native keypress event is assumed to be a command.
 * This is required because Firefox fires `keypress` events for key commands
 * (cut, copy, select-all, etc.) even though no character is inserted.
 */

function isKeypressCommand(nativeEvent) {
  return (nativeEvent.ctrlKey || nativeEvent.altKey || nativeEvent.metaKey) && // ctrlKey && altKey is equivalent to AltGr, and is not a command.
  !(nativeEvent.ctrlKey && nativeEvent.altKey);
}
/**
 * Translate native top level events into event types.
 *
 * @param {string} topLevelType
 * @return {object}
 */


function getCompositionEventType(topLevelType) {
  switch (topLevelType) {
    case TOP_COMPOSITION_START:
      return eventTypes$1.compositionStart;

    case TOP_COMPOSITION_END:
      return eventTypes$1.compositionEnd;

    case TOP_COMPOSITION_UPDATE:
      return eventTypes$1.compositionUpdate;
  }
}
/**
 * Does our fallback best-guess model think this event signifies that
 * composition has begun?
 *
 * @param {string} topLevelType
 * @param {object} nativeEvent
 * @return {boolean}
 */


function isFallbackCompositionStart(topLevelType, nativeEvent) {
  return topLevelType === TOP_KEY_DOWN && nativeEvent.keyCode === START_KEYCODE;
}
/**
 * Does our fallback mode think that this event is the end of composition?
 *
 * @param {string} topLevelType
 * @param {object} nativeEvent
 * @return {boolean}
 */


function isFallbackCompositionEnd(topLevelType, nativeEvent) {
  switch (topLevelType) {
    case TOP_KEY_UP:
      // Command keys insert or clear IME input.
      return END_KEYCODES.indexOf(nativeEvent.keyCode) !== -1;

    case TOP_KEY_DOWN:
      // Expect IME keyCode on each keydown. If we get any other
      // code we must have exited earlier.
      return nativeEvent.keyCode !== START_KEYCODE;

    case TOP_KEY_PRESS:
    case TOP_MOUSE_DOWN:
    case TOP_BLUR:
      // Events are not possible without cancelling IME.
      return true;

    default:
      return false;
  }
}
/**
 * Google Input Tools provides composition data via a CustomEvent,
 * with the `data` property populated in the `detail` object. If this
 * is available on the event object, use it. If not, this is a plain
 * composition event and we have nothing special to extract.
 *
 * @param {object} nativeEvent
 * @return {?string}
 */


function getDataFromCustomEvent(nativeEvent) {
  var detail = nativeEvent.detail;

  if (typeof detail === 'object' && 'data' in detail) {
    return detail.data;
  }

  return null;
}
/**
 * Check if a composition event was triggered by Korean IME.
 * Our fallback mode does not work well with IE's Korean IME,
 * so just use native composition events when Korean IME is used.
 * Although CompositionEvent.locale property is deprecated,
 * it is available in IE, where our fallback mode is enabled.
 *
 * @param {object} nativeEvent
 * @return {boolean}
 */


function isUsingKoreanIME(nativeEvent) {
  return nativeEvent.locale === 'ko';
} // Track the current IME composition status, if any.


var isComposing = false;
/**
 * @return {?object} A SyntheticCompositionEvent.
 */

function extractCompositionEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget) {
  var eventType;
  var fallbackData;

  if (canUseCompositionEvent) {
    eventType = getCompositionEventType(topLevelType);
  } else if (!isComposing) {
    if (isFallbackCompositionStart(topLevelType, nativeEvent)) {
      eventType = eventTypes$1.compositionStart;
    }
  } else if (isFallbackCompositionEnd(topLevelType, nativeEvent)) {
    eventType = eventTypes$1.compositionEnd;
  }

  if (!eventType) {
    return null;
  }

  if (useFallbackCompositionData && !isUsingKoreanIME(nativeEvent)) {
    // The current composition is stored statically and must not be
    // overwritten while composition continues.
    if (!isComposing && eventType === eventTypes$1.compositionStart) {
      isComposing = initialize(nativeEventTarget);
    } else if (eventType === eventTypes$1.compositionEnd) {
      if (isComposing) {
        fallbackData = getData();
      }
    }
  }

  var event = SyntheticCompositionEvent.getPooled(eventType, targetInst, nativeEvent, nativeEventTarget);

  if (fallbackData) {
    // Inject data generated from fallback path into the synthetic event.
    // This matches the property of native CompositionEventInterface.
    event.data = fallbackData;
  } else {
    var customData = getDataFromCustomEvent(nativeEvent);

    if (customData !== null) {
      event.data = customData;
    }
  }

  accumulateTwoPhaseDispatches(event);
  return event;
}
/**
 * @param {TopLevelType} topLevelType Number from `TopLevelType`.
 * @param {object} nativeEvent Native browser event.
 * @return {?string} The string corresponding to this `beforeInput` event.
 */


function getNativeBeforeInputChars(topLevelType, nativeEvent) {
  switch (topLevelType) {
    case TOP_COMPOSITION_END:
      return getDataFromCustomEvent(nativeEvent);

    case TOP_KEY_PRESS:
      /**
       * If native `textInput` events are available, our goal is to make
       * use of them. However, there is a special case: the spacebar key.
       * In Webkit, preventing default on a spacebar `textInput` event
       * cancels character insertion, but it *also* causes the browser
       * to fall back to its default spacebar behavior of scrolling the
       * page.
       *
       * Tracking at:
       * https://code.google.com/p/chromium/issues/detail?id=355103
       *
       * To avoid this issue, use the keypress event as if no `textInput`
       * event is available.
       */
      var which = nativeEvent.which;

      if (which !== SPACEBAR_CODE) {
        return null;
      }

      hasSpaceKeypress = true;
      return SPACEBAR_CHAR;

    case TOP_TEXT_INPUT:
      // Record the characters to be added to the DOM.
      var chars = nativeEvent.data; // If it's a spacebar character, assume that we have already handled
      // it at the keypress level and bail immediately. Android Chrome
      // doesn't give us keycodes, so we need to ignore it.

      if (chars === SPACEBAR_CHAR && hasSpaceKeypress) {
        return null;
      }

      return chars;

    default:
      // For other native event types, do nothing.
      return null;
  }
}
/**
 * For browsers that do not provide the `textInput` event, extract the
 * appropriate string to use for SyntheticInputEvent.
 *
 * @param {number} topLevelType Number from `TopLevelEventTypes`.
 * @param {object} nativeEvent Native browser event.
 * @return {?string} The fallback string for this `beforeInput` event.
 */


function getFallbackBeforeInputChars(topLevelType, nativeEvent) {
  // If we are currently composing (IME) and using a fallback to do so,
  // try to extract the composed characters from the fallback object.
  // If composition event is available, we extract a string only at
  // compositionevent, otherwise extract it at fallback events.
  if (isComposing) {
    if (topLevelType === TOP_COMPOSITION_END || !canUseCompositionEvent && isFallbackCompositionEnd(topLevelType, nativeEvent)) {
      var chars = getData();
      reset();
      isComposing = false;
      return chars;
    }

    return null;
  }

  switch (topLevelType) {
    case TOP_PASTE:
      // If a paste event occurs after a keypress, throw out the input
      // chars. Paste events should not lead to BeforeInput events.
      return null;

    case TOP_KEY_PRESS:
      /**
       * As of v27, Firefox may fire keypress events even when no character
       * will be inserted. A few possibilities:
       *
       * - `which` is `0`. Arrow keys, Esc key, etc.
       *
       * - `which` is the pressed key code, but no char is available.
       *   Ex: 'AltGr + d` in Polish. There is no modified character for
       *   this key combination and no character is inserted into the
       *   document, but FF fires the keypress for char code `100` anyway.
       *   No `input` event will occur.
       *
       * - `which` is the pressed key code, but a command combination is
       *   being used. Ex: `Cmd+C`. No character is inserted, and no
       *   `input` event will occur.
       */
      if (!isKeypressCommand(nativeEvent)) {
        // IE fires the `keypress` event when a user types an emoji via
        // Touch keyboard of Windows.  In such a case, the `char` property
        // holds an emoji character like `\uD83D\uDE0A`.  Because its length
        // is 2, the property `which` does not represent an emoji correctly.
        // In such a case, we directly return the `char` property instead of
        // using `which`.
        if (nativeEvent.char && nativeEvent.char.length > 1) {
          return nativeEvent.char;
        } else if (nativeEvent.which) {
          return String.fromCharCode(nativeEvent.which);
        }
      }

      return null;

    case TOP_COMPOSITION_END:
      return useFallbackCompositionData && !isUsingKoreanIME(nativeEvent) ? null : nativeEvent.data;

    default:
      return null;
  }
}
/**
 * Extract a SyntheticInputEvent for `beforeInput`, based on either native
 * `textInput` or fallback behavior.
 *
 * @return {?object} A SyntheticInputEvent.
 */


function extractBeforeInputEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget) {
  var chars;

  if (canUseTextInputEvent) {
    chars = getNativeBeforeInputChars(topLevelType, nativeEvent);
  } else {
    chars = getFallbackBeforeInputChars(topLevelType, nativeEvent);
  } // If no characters are being inserted, no BeforeInput event should
  // be fired.


  if (!chars) {
    return null;
  }

  var event = SyntheticInputEvent.getPooled(eventTypes$1.beforeInput, targetInst, nativeEvent, nativeEventTarget);
  event.data = chars;
  accumulateTwoPhaseDispatches(event);
  return event;
}
/**
 * Create an `onBeforeInput` event to match
 * http://www.w3.org/TR/2013/WD-DOM-Level-3-Events-20131105/#events-inputevents.
 *
 * This event plugin is based on the native `textInput` event
 * available in Chrome, Safari, Opera, and IE. This event fires after
 * `onKeyPress` and `onCompositionEnd`, but before `onInput`.
 *
 * `beforeInput` is spec'd but not implemented in any browsers, and
 * the `input` event does not provide any useful information about what has
 * actually been added, contrary to the spec. Thus, `textInput` is the best
 * available event to identify the characters that have actually been inserted
 * into the target node.
 *
 * This plugin is also responsible for emitting `composition` events, thus
 * allowing us to share composition fallback code for both `beforeInput` and
 * `composition` event types.
 */


var BeforeInputEventPlugin = {
  eventTypes: eventTypes$1,
  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags) {
    var composition = extractCompositionEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget);
    var beforeInput = extractBeforeInputEvent(topLevelType, targetInst, nativeEvent, nativeEventTarget);

    if (composition === null) {
      return beforeInput;
    }

    if (beforeInput === null) {
      return composition;
    }

    return [composition, beforeInput];
  }
};

/**
 * @see http://www.whatwg.org/specs/web-apps/current-work/multipage/the-input-element.html#input-type-attr-summary
 */
var supportedInputTypes = {
  color: true,
  date: true,
  datetime: true,
  'datetime-local': true,
  email: true,
  month: true,
  number: true,
  password: true,
  range: true,
  search: true,
  tel: true,
  text: true,
  time: true,
  url: true,
  week: true
};

function isTextInputElement(elem) {
  var nodeName = elem && elem.nodeName && elem.nodeName.toLowerCase();

  if (nodeName === 'input') {
    return !!supportedInputTypes[elem.type];
  }

  if (nodeName === 'textarea') {
    return true;
  }

  return false;
}

var eventTypes$2 = {
  change: {
    phasedRegistrationNames: {
      bubbled: 'onChange',
      captured: 'onChangeCapture'
    },
    dependencies: [TOP_BLUR, TOP_CHANGE, TOP_CLICK, TOP_FOCUS, TOP_INPUT, TOP_KEY_DOWN, TOP_KEY_UP, TOP_SELECTION_CHANGE]
  }
};

function createAndAccumulateChangeEvent(inst, nativeEvent, target) {
  var event = SyntheticEvent.getPooled(eventTypes$2.change, inst, nativeEvent, target);
  event.type = 'change'; // Flag this event loop as needing state restore.

  enqueueStateRestore(target);
  accumulateTwoPhaseDispatches(event);
  return event;
}
/**
 * For IE shims
 */


var activeElement = null;
var activeElementInst = null;
/**
 * SECTION: handle `change` event
 */

function shouldUseChangeEvent(elem) {
  var nodeName = elem.nodeName && elem.nodeName.toLowerCase();
  return nodeName === 'select' || nodeName === 'input' && elem.type === 'file';
}

function manualDispatchChangeEvent(nativeEvent) {
  var event = createAndAccumulateChangeEvent(activeElementInst, nativeEvent, getEventTarget(nativeEvent)); // If change and propertychange bubbled, we'd just bind to it like all the
  // other events and have it go through ReactBrowserEventEmitter. Since it
  // doesn't, we manually listen for the events and so we have to enqueue and
  // process the abstract event manually.
  //
  // Batching is necessary here in order to ensure that all event handlers run
  // before the next rerender (including event handlers attached to ancestor
  // elements instead of directly on the input). Without this, controlled
  // components don't work properly in conjunction with event bubbling because
  // the component is rerendered and the value reverted before all the event
  // handlers can run. See https://github.com/facebook/react/issues/708.

  batchedUpdates(runEventInBatch, event);
}

function runEventInBatch(event) {
  runEventsInBatch(event);
}

function getInstIfValueChanged(targetInst) {
  var targetNode = getNodeFromInstance$1(targetInst);

  if (updateValueIfChanged(targetNode)) {
    return targetInst;
  }
}

function getTargetInstForChangeEvent(topLevelType, targetInst) {
  if (topLevelType === TOP_CHANGE) {
    return targetInst;
  }
}
/**
 * SECTION: handle `input` event
 */


var isInputEventSupported = false;

if (canUseDOM) {
  // IE9 claims to support the input event but fails to trigger it when
  // deleting text, so we ignore its input events.
  isInputEventSupported = isEventSupported('input') && (!document.documentMode || document.documentMode > 9);
}
/**
 * (For IE <=9) Starts tracking propertychange events on the passed-in element
 * and override the value property so that we can distinguish user events from
 * value changes in JS.
 */


function startWatchingForValueChange(target, targetInst) {
  activeElement = target;
  activeElementInst = targetInst;
  activeElement.attachEvent('onpropertychange', handlePropertyChange);
}
/**
 * (For IE <=9) Removes the event listeners from the currently-tracked element,
 * if any exists.
 */


function stopWatchingForValueChange() {
  if (!activeElement) {
    return;
  }

  activeElement.detachEvent('onpropertychange', handlePropertyChange);
  activeElement = null;
  activeElementInst = null;
}
/**
 * (For IE <=9) Handles a propertychange event, sending a `change` event if
 * the value of the active element has changed.
 */


function handlePropertyChange(nativeEvent) {
  if (nativeEvent.propertyName !== 'value') {
    return;
  }

  if (getInstIfValueChanged(activeElementInst)) {
    manualDispatchChangeEvent(nativeEvent);
  }
}

function handleEventsForInputEventPolyfill(topLevelType, target, targetInst) {
  if (topLevelType === TOP_FOCUS) {
    // In IE9, propertychange fires for most input events but is buggy and
    // doesn't fire when text is deleted, but conveniently, selectionchange
    // appears to fire in all of the remaining cases so we catch those and
    // forward the event if the value has changed
    // In either case, we don't want to call the event handler if the value
    // is changed from JS so we redefine a setter for `.value` that updates
    // our activeElementValue variable, allowing us to ignore those changes
    //
    // stopWatching() should be a noop here but we call it just in case we
    // missed a blur event somehow.
    stopWatchingForValueChange();
    startWatchingForValueChange(target, targetInst);
  } else if (topLevelType === TOP_BLUR) {
    stopWatchingForValueChange();
  }
} // For IE8 and IE9.


function getTargetInstForInputEventPolyfill(topLevelType, targetInst) {
  if (topLevelType === TOP_SELECTION_CHANGE || topLevelType === TOP_KEY_UP || topLevelType === TOP_KEY_DOWN) {
    // On the selectionchange event, the target is just document which isn't
    // helpful for us so just check activeElement instead.
    //
    // 99% of the time, keydown and keyup aren't necessary. IE8 fails to fire
    // propertychange on the first input event after setting `value` from a
    // script and fires only keydown, keypress, keyup. Catching keyup usually
    // gets it and catching keydown lets us fire an event for the first
    // keystroke if user does a key repeat (it'll be a little delayed: right
    // before the second keystroke). Other input methods (e.g., paste) seem to
    // fire selectionchange normally.
    return getInstIfValueChanged(activeElementInst);
  }
}
/**
 * SECTION: handle `click` event
 */


function shouldUseClickEvent(elem) {
  // Use the `click` event to detect changes to checkbox and radio inputs.
  // This approach works across all browsers, whereas `change` does not fire
  // until `blur` in IE8.
  var nodeName = elem.nodeName;
  return nodeName && nodeName.toLowerCase() === 'input' && (elem.type === 'checkbox' || elem.type === 'radio');
}

function getTargetInstForClickEvent(topLevelType, targetInst) {
  if (topLevelType === TOP_CLICK) {
    return getInstIfValueChanged(targetInst);
  }
}

function getTargetInstForInputOrChangeEvent(topLevelType, targetInst) {
  if (topLevelType === TOP_INPUT || topLevelType === TOP_CHANGE) {
    return getInstIfValueChanged(targetInst);
  }
}

function handleControlledInputBlur(node) {
  var state = node._wrapperState;

  if (!state || !state.controlled || node.type !== 'number') {
    return;
  }

  if (!disableInputAttributeSyncing) {
    // If controlled, assign the value attribute to the current value on blur
    setDefaultValue(node, 'number', node.value);
  }
}
/**
 * This plugin creates an `onChange` event that normalizes change events
 * across form elements. This event fires at a time when it's possible to
 * change the element's value without seeing a flicker.
 *
 * Supported elements are:
 * - input (see `isTextInputElement`)
 * - textarea
 * - select
 */


var ChangeEventPlugin = {
  eventTypes: eventTypes$2,
  _isInputEventSupported: isInputEventSupported,
  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags) {
    var targetNode = targetInst ? getNodeFromInstance$1(targetInst) : window;
    var getTargetInstFunc, handleEventFunc;

    if (shouldUseChangeEvent(targetNode)) {
      getTargetInstFunc = getTargetInstForChangeEvent;
    } else if (isTextInputElement(targetNode)) {
      if (isInputEventSupported) {
        getTargetInstFunc = getTargetInstForInputOrChangeEvent;
      } else {
        getTargetInstFunc = getTargetInstForInputEventPolyfill;
        handleEventFunc = handleEventsForInputEventPolyfill;
      }
    } else if (shouldUseClickEvent(targetNode)) {
      getTargetInstFunc = getTargetInstForClickEvent;
    }

    if (getTargetInstFunc) {
      var inst = getTargetInstFunc(topLevelType, targetInst);

      if (inst) {
        var event = createAndAccumulateChangeEvent(inst, nativeEvent, nativeEventTarget);
        return event;
      }
    }

    if (handleEventFunc) {
      handleEventFunc(topLevelType, targetNode, targetInst);
    } // When blurring, set the value attribute for number inputs


    if (topLevelType === TOP_BLUR) {
      handleControlledInputBlur(targetNode);
    }
  }
};

/**
 * Module that is injectable into `EventPluginHub`, that specifies a
 * deterministic ordering of `EventPlugin`s. A convenient way to reason about
 * plugins, without having to package every one of them. This is better than
 * having plugins be ordered in the same order that they are injected because
 * that ordering would be influenced by the packaging order.
 * `ResponderEventPlugin` must occur before `SimpleEventPlugin` so that
 * preventing default on events is convenient in `SimpleEventPlugin` handlers.
 */
var DOMEventPluginOrder = ['ResponderEventPlugin', 'SimpleEventPlugin', 'EnterLeaveEventPlugin', 'ChangeEventPlugin', 'SelectEventPlugin', 'BeforeInputEventPlugin'];

var eventTypes$3 = {
  mouseEnter: {
    registrationName: 'onMouseEnter',
    dependencies: [TOP_MOUSE_OUT, TOP_MOUSE_OVER]
  },
  mouseLeave: {
    registrationName: 'onMouseLeave',
    dependencies: [TOP_MOUSE_OUT, TOP_MOUSE_OVER]
  },
  pointerEnter: {
    registrationName: 'onPointerEnter',
    dependencies: [TOP_POINTER_OUT, TOP_POINTER_OVER]
  },
  pointerLeave: {
    registrationName: 'onPointerLeave',
    dependencies: [TOP_POINTER_OUT, TOP_POINTER_OVER]
  }
}; // We track the lastNativeEvent to ensure that when we encounter
// cases where we process the same nativeEvent multiple times,
// which can happen when have multiple ancestors, that we don't
// duplicate enter

var lastNativeEvent;
var EnterLeaveEventPlugin = {
  eventTypes: eventTypes$3,

  /**
   * For almost every interaction we care about, there will be both a top-level
   * `mouseover` and `mouseout` event that occurs. Only use `mouseout` so that
   * we do not extract duplicate events. However, moving the mouse into the
   * browser from outside will not fire a `mouseout` event. In this case, we use
   * the `mouseover` top-level event.
   */
  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags) {
    var isOverEvent = topLevelType === TOP_MOUSE_OVER || topLevelType === TOP_POINTER_OVER;
    var isOutEvent = topLevelType === TOP_MOUSE_OUT || topLevelType === TOP_POINTER_OUT;

    if (isOverEvent && (eventSystemFlags & IS_REPLAYED) === 0 && (nativeEvent.relatedTarget || nativeEvent.fromElement)) {
      // If this is an over event with a target, then we've already dispatched
      // the event in the out event of the other target. If this is replayed,
      // then it's because we couldn't dispatch against this target previously
      // so we have to do it now instead.
      return null;
    }

    if (!isOutEvent && !isOverEvent) {
      // Must not be a mouse or pointer in or out - ignoring.
      return null;
    }

    var win;

    if (nativeEventTarget.window === nativeEventTarget) {
      // `nativeEventTarget` is probably a window object.
      win = nativeEventTarget;
    } else {
      // TODO: Figure out why `ownerDocument` is sometimes undefined in IE8.
      var doc = nativeEventTarget.ownerDocument;

      if (doc) {
        win = doc.defaultView || doc.parentWindow;
      } else {
        win = window;
      }
    }

    var from;
    var to;

    if (isOutEvent) {
      from = targetInst;
      var related = nativeEvent.relatedTarget || nativeEvent.toElement;
      to = related ? getClosestInstanceFromNode(related) : null;

      if (to !== null) {
        var nearestMounted = getNearestMountedFiber(to);

        if (to !== nearestMounted || to.tag !== HostComponent && to.tag !== HostText) {
          to = null;
        }
      }
    } else {
      // Moving to a node from outside the window.
      from = null;
      to = targetInst;
    }

    if (from === to) {
      // Nothing pertains to our managed components.
      return null;
    }

    var eventInterface, leaveEventType, enterEventType, eventTypePrefix;

    if (topLevelType === TOP_MOUSE_OUT || topLevelType === TOP_MOUSE_OVER) {
      eventInterface = SyntheticMouseEvent;
      leaveEventType = eventTypes$3.mouseLeave;
      enterEventType = eventTypes$3.mouseEnter;
      eventTypePrefix = 'mouse';
    } else if (topLevelType === TOP_POINTER_OUT || topLevelType === TOP_POINTER_OVER) {
      eventInterface = SyntheticPointerEvent;
      leaveEventType = eventTypes$3.pointerLeave;
      enterEventType = eventTypes$3.pointerEnter;
      eventTypePrefix = 'pointer';
    }

    var fromNode = from == null ? win : getNodeFromInstance$1(from);
    var toNode = to == null ? win : getNodeFromInstance$1(to);
    var leave = eventInterface.getPooled(leaveEventType, from, nativeEvent, nativeEventTarget);
    leave.type = eventTypePrefix + 'leave';
    leave.target = fromNode;
    leave.relatedTarget = toNode;
    var enter = eventInterface.getPooled(enterEventType, to, nativeEvent, nativeEventTarget);
    enter.type = eventTypePrefix + 'enter';
    enter.target = toNode;
    enter.relatedTarget = fromNode;
    accumulateEnterLeaveDispatches(leave, enter, from, to);

    if (nativeEvent === lastNativeEvent) {
      lastNativeEvent = null;
      return [leave];
    }

    lastNativeEvent = nativeEvent;
    return [leave, enter];
  }
};

/**
 * inlined Object.is polyfill to avoid requiring consumers ship their own
 * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is
 */
function is(x, y) {
  return x === y && (x !== 0 || 1 / x === 1 / y) || x !== x && y !== y // eslint-disable-line no-self-compare
  ;
}

var is$1 = typeof Object.is === 'function' ? Object.is : is;

var hasOwnProperty$2 = Object.prototype.hasOwnProperty;
/**
 * Performs equality by iterating through keys on an object and returning false
 * when any key has values which are not strictly equal between the arguments.
 * Returns true when the values of all keys are strictly equal.
 */

function shallowEqual(objA, objB) {
  if (is$1(objA, objB)) {
    return true;
  }

  if (typeof objA !== 'object' || objA === null || typeof objB !== 'object' || objB === null) {
    return false;
  }

  var keysA = Object.keys(objA);
  var keysB = Object.keys(objB);

  if (keysA.length !== keysB.length) {
    return false;
  } // Test for A's keys different from B.


  for (var i = 0; i < keysA.length; i++) {
    if (!hasOwnProperty$2.call(objB, keysA[i]) || !is$1(objA[keysA[i]], objB[keysA[i]])) {
      return false;
    }
  }

  return true;
}

var skipSelectionChangeEvent = canUseDOM && 'documentMode' in document && document.documentMode <= 11;
var eventTypes$4 = {
  select: {
    phasedRegistrationNames: {
      bubbled: 'onSelect',
      captured: 'onSelectCapture'
    },
    dependencies: [TOP_BLUR, TOP_CONTEXT_MENU, TOP_DRAG_END, TOP_FOCUS, TOP_KEY_DOWN, TOP_KEY_UP, TOP_MOUSE_DOWN, TOP_MOUSE_UP, TOP_SELECTION_CHANGE]
  }
};
var activeElement$1 = null;
var activeElementInst$1 = null;
var lastSelection = null;
var mouseDown = false;
/**
 * Get an object which is a unique representation of the current selection.
 *
 * The return value will not be consistent across nodes or browsers, but
 * two identical selections on the same node will return identical objects.
 *
 * @param {DOMElement} node
 * @return {object}
 */

function getSelection$1(node) {
  if ('selectionStart' in node && hasSelectionCapabilities(node)) {
    return {
      start: node.selectionStart,
      end: node.selectionEnd
    };
  } else {
    var win = node.ownerDocument && node.ownerDocument.defaultView || window;
    var selection = win.getSelection();
    return {
      anchorNode: selection.anchorNode,
      anchorOffset: selection.anchorOffset,
      focusNode: selection.focusNode,
      focusOffset: selection.focusOffset
    };
  }
}
/**
 * Get document associated with the event target.
 *
 * @param {object} nativeEventTarget
 * @return {Document}
 */


function getEventTargetDocument(eventTarget) {
  return eventTarget.window === eventTarget ? eventTarget.document : eventTarget.nodeType === DOCUMENT_NODE ? eventTarget : eventTarget.ownerDocument;
}
/**
 * Poll selection to see whether it's changed.
 *
 * @param {object} nativeEvent
 * @param {object} nativeEventTarget
 * @return {?SyntheticEvent}
 */


function constructSelectEvent(nativeEvent, nativeEventTarget) {
  // Ensure we have the right element, and that the user is not dragging a
  // selection (this matches native `select` event behavior). In HTML5, select
  // fires only on input and textarea thus if there's no focused element we
  // won't dispatch.
  var doc = getEventTargetDocument(nativeEventTarget);

  if (mouseDown || activeElement$1 == null || activeElement$1 !== getActiveElement(doc)) {
    return null;
  } // Only fire when selection has actually changed.


  var currentSelection = getSelection$1(activeElement$1);

  if (!lastSelection || !shallowEqual(lastSelection, currentSelection)) {
    lastSelection = currentSelection;
    var syntheticEvent = SyntheticEvent.getPooled(eventTypes$4.select, activeElementInst$1, nativeEvent, nativeEventTarget);
    syntheticEvent.type = 'select';
    syntheticEvent.target = activeElement$1;
    accumulateTwoPhaseDispatches(syntheticEvent);
    return syntheticEvent;
  }

  return null;
}
/**
 * This plugin creates an `onSelect` event that normalizes select events
 * across form elements.
 *
 * Supported elements are:
 * - input (see `isTextInputElement`)
 * - textarea
 * - contentEditable
 *
 * This differs from native browser implementations in the following ways:
 * - Fires on contentEditable fields as well as inputs.
 * - Fires for collapsed selection.
 * - Fires after user input.
 */


var SelectEventPlugin = {
  eventTypes: eventTypes$4,
  extractEvents: function (topLevelType, targetInst, nativeEvent, nativeEventTarget, eventSystemFlags) {
    var doc = getEventTargetDocument(nativeEventTarget); // Track whether all listeners exists for this plugin. If none exist, we do
    // not extract events. See #3639.

    if (!doc || !isListeningToAllDependencies('onSelect', doc)) {
      return null;
    }

    var targetNode = targetInst ? getNodeFromInstance$1(targetInst) : window;

    switch (topLevelType) {
      // Track the input node that has focus.
      case TOP_FOCUS:
        if (isTextInputElement(targetNode) || targetNode.contentEditable === 'true') {
          activeElement$1 = targetNode;
          activeElementInst$1 = targetInst;
          lastSelection = null;
        }

        break;

      case TOP_BLUR:
        activeElement$1 = null;
        activeElementInst$1 = null;
        lastSelection = null;
        break;
      // Don't fire the event while the user is dragging. This matches the
      // semantics of the native select event.

      case TOP_MOUSE_DOWN:
        mouseDown = true;
        break;

      case TOP_CONTEXT_MENU:
      case TOP_MOUSE_UP:
      case TOP_DRAG_END:
        mouseDown = false;
        return constructSelectEvent(nativeEvent, nativeEventTarget);
      // Chrome and IE fire non-standard event when selection is changed (and
      // sometimes when it hasn't). IE's event fires out of order with respect
      // to key and input events on deletion, so we discard it.
      //
      // Firefox doesn't support selectionchange, so check selection status
      // after each key entry. The selection changes after keydown and before
      // keyup, but we check on keydown as well in the case of holding down a
      // key, when multiple keydown events are fired but only one keyup is.
      // This is also our approach for IE handling, for the reason above.

      case TOP_SELECTION_CHANGE:
        if (skipSelectionChangeEvent) {
          break;
        }

      // falls through

      case TOP_KEY_DOWN:
      case TOP_KEY_UP:
        return constructSelectEvent(nativeEvent, nativeEventTarget);
    }

    return null;
  }
};

/**
 * Inject modules for resolving DOM hierarchy and plugin ordering.
 */

injection.injectEventPluginOrder(DOMEventPluginOrder);
setComponentTree(getFiberCurrentPropsFromNode$1, getInstanceFromNode$1, getNodeFromInstance$1);
/**
 * Some important event plugins included by default (without having to require
 * them).
 */

injection.injectEventPluginsByName({
  SimpleEventPlugin: SimpleEventPlugin,
  EnterLeaveEventPlugin: EnterLeaveEventPlugin,
  ChangeEventPlugin: ChangeEventPlugin,
  SelectEventPlugin: SelectEventPlugin,
  BeforeInputEventPlugin: BeforeInputEventPlugin
});

// Prefix measurements so that it's possible to filter them.
// Longer prefixes are hard to read in DevTools.
var reactEmoji = "\u269B";
var warningEmoji = "\u26D4";
var supportsUserTiming = typeof performance !== 'undefined' && typeof performance.mark === 'function' && typeof performance.clearMarks === 'function' && typeof performance.measure === 'function' && typeof performance.clearMeasures === 'function'; // Keep track of current fiber so that we know the path to unwind on pause.
// TODO: this looks the same as nextUnitOfWork in scheduler. Can we unify them?

var currentFiber = null; // If we're in the middle of user code, which fiber and method is it?
// Reusing `currentFiber` would be confusing for this because user code fiber
// can change during commit phase too, but we don't need to unwind it (since
// lifecycles in the commit phase don't resemble a tree).

var currentPhase = null;
var currentPhaseFiber = null; // Did lifecycle hook schedule an update? This is often a performance problem,
// so we will keep track of it, and include it in the report.
// Track commits caused by cascading updates.

var isCommitting = false;
var hasScheduledUpdateInCurrentCommit = false;
var hasScheduledUpdateInCurrentPhase = false;
var commitCountInCurrentWorkLoop = 0;
var effectCountInCurrentCommit = 0;
// to avoid stretch the commit phase with measurement overhead.

var labelsInCurrentCommit = new Set();

var formatMarkName = function (markName) {
  return reactEmoji + " " + markName;
};

var formatLabel = function (label, warning) {
  var prefix = warning ? warningEmoji + " " : reactEmoji + " ";
  var suffix = warning ? " Warning: " + warning : '';
  return "" + prefix + label + suffix;
};

var beginMark = function (markName) {
  performance.mark(formatMarkName(markName));
};

var clearMark = function (markName) {
  performance.clearMarks(formatMarkName(markName));
};

var endMark = function (label, markName, warning) {
  var formattedMarkName = formatMarkName(markName);
  var formattedLabel = formatLabel(label, warning);

  try {
    performance.measure(formattedLabel, formattedMarkName);
  } catch (err) {} // If previous mark was missing for some reason, this will throw.
  // This could only happen if React crashed in an unexpected place earlier.
  // Don't pile on with more errors.
  // Clear marks immediately to avoid growing buffer.


  performance.clearMarks(formattedMarkName);
  performance.clearMeasures(formattedLabel);
};

var getFiberMarkName = function (label, debugID) {
  return label + " (#" + debugID + ")";
};

var getFiberLabel = function (componentName, isMounted, phase) {
  if (phase === null) {
    // These are composite component total time measurements.
    return componentName + " [" + (isMounted ? 'update' : 'mount') + "]";
  } else {
    // Composite component methods.
    return componentName + "." + phase;
  }
};

var beginFiberMark = function (fiber, phase) {
  var componentName = getComponentName(fiber.type) || 'Unknown';
  var debugID = fiber._debugID;
  var isMounted = fiber.alternate !== null;
  var label = getFiberLabel(componentName, isMounted, phase);

  if (isCommitting && labelsInCurrentCommit.has(label)) {
    // During the commit phase, we don't show duplicate labels because
    // there is a fixed overhead for every measurement, and we don't
    // want to stretch the commit phase beyond necessary.
    return false;
  }

  labelsInCurrentCommit.add(label);
  var markName = getFiberMarkName(label, debugID);
  beginMark(markName);
  return true;
};

var clearFiberMark = function (fiber, phase) {
  var componentName = getComponentName(fiber.type) || 'Unknown';
  var debugID = fiber._debugID;
  var isMounted = fiber.alternate !== null;
  var label = getFiberLabel(componentName, isMounted, phase);
  var markName = getFiberMarkName(label, debugID);
  clearMark(markName);
};

var endFiberMark = function (fiber, phase, warning) {
  var componentName = getComponentName(fiber.type) || 'Unknown';
  var debugID = fiber._debugID;
  var isMounted = fiber.alternate !== null;
  var label = getFiberLabel(componentName, isMounted, phase);
  var markName = getFiberMarkName(label, debugID);
  endMark(label, markName, warning);
};

var shouldIgnoreFiber = function (fiber) {
  // Host components should be skipped in the timeline.
  // We could check typeof fiber.type, but does this work with RN?
  switch (fiber.tag) {
    case HostRoot:
    case HostComponent:
    case HostText:
    case HostPortal:
    case Fragment:
    case ContextProvider:
    case ContextConsumer:
    case Mode:
      return true;

    default:
      return false;
  }
};

var clearPendingPhaseMeasurement = function () {
  if (currentPhase !== null && currentPhaseFiber !== null) {
    clearFiberMark(currentPhaseFiber, currentPhase);
  }

  currentPhaseFiber = null;
  currentPhase = null;
  hasScheduledUpdateInCurrentPhase = false;
};

var pauseTimers = function () {
  // Stops all currently active measurements so that they can be resumed
  // if we continue in a later deferred loop from the same unit of work.
  var fiber = currentFiber;

  while (fiber) {
    if (fiber._debugIsCurrentlyTiming) {
      endFiberMark(fiber, null, null);
    }

    fiber = fiber.return;
  }
};

var resumeTimersRecursively = function (fiber) {
  if (fiber.return !== null) {
    resumeTimersRecursively(fiber.return);
  }

  if (fiber._debugIsCurrentlyTiming) {
    beginFiberMark(fiber, null);
  }
};

var resumeTimers = function () {
  // Resumes all measurements that were active during the last deferred loop.
  if (currentFiber !== null) {
    resumeTimersRecursively(currentFiber);
  }
};

function recordEffect() {
  if (enableUserTimingAPI) {
    effectCountInCurrentCommit++;
  }
}
function recordScheduleUpdate() {
  if (enableUserTimingAPI) {
    if (isCommitting) {
      hasScheduledUpdateInCurrentCommit = true;
    }

    if (currentPhase !== null && currentPhase !== 'componentWillMount' && currentPhase !== 'componentWillReceiveProps') {
      hasScheduledUpdateInCurrentPhase = true;
    }
  }
}


function startWorkTimer(fiber) {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming || shouldIgnoreFiber(fiber)) {
      return;
    } // If we pause, this is the fiber to unwind from.


    currentFiber = fiber;

    if (!beginFiberMark(fiber, null)) {
      return;
    }

    fiber._debugIsCurrentlyTiming = true;
  }
}
function cancelWorkTimer(fiber) {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming || shouldIgnoreFiber(fiber)) {
      return;
    } // Remember we shouldn't complete measurement for this fiber.
    // Otherwise flamechart will be deep even for small updates.


    fiber._debugIsCurrentlyTiming = false;
    clearFiberMark(fiber, null);
  }
}
function stopWorkTimer(fiber) {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming || shouldIgnoreFiber(fiber)) {
      return;
    } // If we pause, its parent is the fiber to unwind from.


    currentFiber = fiber.return;

    if (!fiber._debugIsCurrentlyTiming) {
      return;
    }

    fiber._debugIsCurrentlyTiming = false;
    endFiberMark(fiber, null, null);
  }
}
function stopFailedWorkTimer(fiber) {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming || shouldIgnoreFiber(fiber)) {
      return;
    } // If we pause, its parent is the fiber to unwind from.


    currentFiber = fiber.return;

    if (!fiber._debugIsCurrentlyTiming) {
      return;
    }

    fiber._debugIsCurrentlyTiming = false;
    var warning = fiber.tag === SuspenseComponent ? 'Rendering was suspended' : 'An error was thrown inside this error boundary';
    endFiberMark(fiber, null, warning);
  }
}
function startPhaseTimer(fiber, phase) {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    clearPendingPhaseMeasurement();

    if (!beginFiberMark(fiber, phase)) {
      return;
    }

    currentPhaseFiber = fiber;
    currentPhase = phase;
  }
}
function stopPhaseTimer() {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    if (currentPhase !== null && currentPhaseFiber !== null) {
      var warning = hasScheduledUpdateInCurrentPhase ? 'Scheduled a cascading update' : null;
      endFiberMark(currentPhaseFiber, currentPhase, warning);
    }

    currentPhase = null;
    currentPhaseFiber = null;
  }
}
function startWorkLoopTimer(nextUnitOfWork) {
  if (enableUserTimingAPI) {
    currentFiber = nextUnitOfWork;

    if (!supportsUserTiming) {
      return;
    }

    commitCountInCurrentWorkLoop = 0; // This is top level call.
    // Any other measurements are performed within.

    beginMark('(React Tree Reconciliation)'); // Resume any measurements that were in progress during the last loop.

    resumeTimers();
  }
}
function stopWorkLoopTimer(interruptedBy, didCompleteRoot) {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    var warning = null;

    if (interruptedBy !== null) {
      if (interruptedBy.tag === HostRoot) {
        warning = 'A top-level update interrupted the previous render';
      } else {
        var componentName = getComponentName(interruptedBy.type) || 'Unknown';
        warning = "An update to " + componentName + " interrupted the previous render";
      }
    } else if (commitCountInCurrentWorkLoop > 1) {
      warning = 'There were cascading updates';
    }

    commitCountInCurrentWorkLoop = 0;
    var label = didCompleteRoot ? '(React Tree Reconciliation: Completed Root)' : '(React Tree Reconciliation: Yielded)'; // Pause any measurements until the next loop.

    pauseTimers();
    endMark(label, '(React Tree Reconciliation)', warning);
  }
}
function startCommitTimer() {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    isCommitting = true;
    hasScheduledUpdateInCurrentCommit = false;
    labelsInCurrentCommit.clear();
    beginMark('(Committing Changes)');
  }
}
function stopCommitTimer() {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    var warning = null;

    if (hasScheduledUpdateInCurrentCommit) {
      warning = 'Lifecycle hook scheduled a cascading update';
    } else if (commitCountInCurrentWorkLoop > 0) {
      warning = 'Caused by a cascading update in earlier commit';
    }

    hasScheduledUpdateInCurrentCommit = false;
    commitCountInCurrentWorkLoop++;
    isCommitting = false;
    labelsInCurrentCommit.clear();
    endMark('(Committing Changes)', '(Committing Changes)', warning);
  }
}
function startCommitSnapshotEffectsTimer() {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    effectCountInCurrentCommit = 0;
    beginMark('(Committing Snapshot Effects)');
  }
}
function stopCommitSnapshotEffectsTimer() {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    var count = effectCountInCurrentCommit;
    effectCountInCurrentCommit = 0;
    endMark("(Committing Snapshot Effects: " + count + " Total)", '(Committing Snapshot Effects)', null);
  }
}
function startCommitHostEffectsTimer() {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    effectCountInCurrentCommit = 0;
    beginMark('(Committing Host Effects)');
  }
}
function stopCommitHostEffectsTimer() {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    var count = effectCountInCurrentCommit;
    effectCountInCurrentCommit = 0;
    endMark("(Committing Host Effects: " + count + " Total)", '(Committing Host Effects)', null);
  }
}
function startCommitLifeCyclesTimer() {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    effectCountInCurrentCommit = 0;
    beginMark('(Calling Lifecycle Methods)');
  }
}
function stopCommitLifeCyclesTimer() {
  if (enableUserTimingAPI) {
    if (!supportsUserTiming) {
      return;
    }

    var count = effectCountInCurrentCommit;
    effectCountInCurrentCommit = 0;
    endMark("(Calling Lifecycle Methods: " + count + " Total)", '(Calling Lifecycle Methods)', null);
  }
}

var valueStack = [];
var fiberStack;

{
  fiberStack = [];
}

var index = -1;

function createCursor(defaultValue) {
  return {
    current: defaultValue
  };
}

function pop(cursor, fiber) {
  if (index < 0) {
    {
      warningWithoutStack$1(false, 'Unexpected pop.');
    }

    return;
  }

  {
    if (fiber !== fiberStack[index]) {
      warningWithoutStack$1(false, 'Unexpected Fiber popped.');
    }
  }

  cursor.current = valueStack[index];
  valueStack[index] = null;

  {
    fiberStack[index] = null;
  }

  index--;
}

function push(cursor, value, fiber) {
  index++;
  valueStack[index] = cursor.current;

  {
    fiberStack[index] = fiber;
  }

  cursor.current = value;
}

var warnedAboutMissingGetChildContext;

{
  warnedAboutMissingGetChildContext = {};
}

var emptyContextObject = {};

{
  Object.freeze(emptyContextObject);
} // A cursor to the current merged context object on the stack.


var contextStackCursor = createCursor(emptyContextObject); // A cursor to a boolean indicating whether the context has changed.

var didPerformWorkStackCursor = createCursor(false); // Keep track of the previous context object that was on the stack.
// We use this to get access to the parent context after we have already
// pushed the next context provider, and now need to merge their contexts.

var previousContext = emptyContextObject;

function getUnmaskedContext(workInProgress, Component, didPushOwnContextIfProvider) {
  if (disableLegacyContext) {
    return emptyContextObject;
  } else {
    if (didPushOwnContextIfProvider && isContextProvider(Component)) {
      // If the fiber is a context provider itself, when we read its context
      // we may have already pushed its own child context on the stack. A context
      // provider should not "see" its own child context. Therefore we read the
      // previous (parent) context instead for a context provider.
      return previousContext;
    }

    return contextStackCursor.current;
  }
}

function cacheContext(workInProgress, unmaskedContext, maskedContext) {
  if (disableLegacyContext) {
    return;
  } else {
    var instance = workInProgress.stateNode;
    instance.__reactInternalMemoizedUnmaskedChildContext = unmaskedContext;
    instance.__reactInternalMemoizedMaskedChildContext = maskedContext;
  }
}

function getMaskedContext(workInProgress, unmaskedContext) {
  if (disableLegacyContext) {
    return emptyContextObject;
  } else {
    var type = workInProgress.type;
    var contextTypes = type.contextTypes;

    if (!contextTypes) {
      return emptyContextObject;
    } // Avoid recreating masked context unless unmasked context has changed.
    // Failing to do this will result in unnecessary calls to componentWillReceiveProps.
    // This may trigger infinite loops if componentWillReceiveProps calls setState.


    var instance = workInProgress.stateNode;

    if (instance && instance.__reactInternalMemoizedUnmaskedChildContext === unmaskedContext) {
      return instance.__reactInternalMemoizedMaskedChildContext;
    }

    var context = {};

    for (var key in contextTypes) {
      context[key] = unmaskedContext[key];
    }

    {
      var name = getComponentName(type) || 'Unknown';
      checkPropTypes(contextTypes, context, 'context', name, getCurrentFiberStackInDev);
    } // Cache unmasked context so we can avoid recreating masked context unless necessary.
    // Context is created before the class component is instantiated so check for instance.


    if (instance) {
      cacheContext(workInProgress, unmaskedContext, context);
    }

    return context;
  }
}

function hasContextChanged() {
  if (disableLegacyContext) {
    return false;
  } else {
    return didPerformWorkStackCursor.current;
  }
}

function isContextProvider(type) {
  if (disableLegacyContext) {
    return false;
  } else {
    var childContextTypes = type.childContextTypes;
    return childContextTypes !== null && childContextTypes !== undefined;
  }
}

function popContext(fiber) {
  if (disableLegacyContext) {
    return;
  } else {
    pop(didPerformWorkStackCursor, fiber);
    pop(contextStackCursor, fiber);
  }
}

function popTopLevelContextObject(fiber) {
  if (disableLegacyContext) {
    return;
  } else {
    pop(didPerformWorkStackCursor, fiber);
    pop(contextStackCursor, fiber);
  }
}

function pushTopLevelContextObject(fiber, context, didChange) {
  if (disableLegacyContext) {
    return;
  } else {
    if (!(contextStackCursor.current === emptyContextObject)) {
      {
        throw Error("Unexpected context found on stack. This error is likely caused by a bug in React. Please file an issue.");
      }
    }

    push(contextStackCursor, context, fiber);
    push(didPerformWorkStackCursor, didChange, fiber);
  }
}

function processChildContext(fiber, type, parentContext) {
  if (disableLegacyContext) {
    return parentContext;
  } else {
    var instance = fiber.stateNode;
    var childContextTypes = type.childContextTypes; // TODO (bvaughn) Replace this behavior with an invariant() in the future.
    // It has only been added in Fiber to match the (unintentional) behavior in Stack.

    if (typeof instance.getChildContext !== 'function') {
      {
        var componentName = getComponentName(type) || 'Unknown';

        if (!warnedAboutMissingGetChildContext[componentName]) {
          warnedAboutMissingGetChildContext[componentName] = true;
          warningWithoutStack$1(false, '%s.childContextTypes is specified but there is no getChildContext() method ' + 'on the instance. You can either define getChildContext() on %s or remove ' + 'childContextTypes from it.', componentName, componentName);
        }
      }

      return parentContext;
    }

    var childContext;

    {
      setCurrentPhase('getChildContext');
    }

    startPhaseTimer(fiber, 'getChildContext');
    childContext = instance.getChildContext();
    stopPhaseTimer();

    {
      setCurrentPhase(null);
    }

    for (var contextKey in childContext) {
      if (!(contextKey in childContextTypes)) {
        {
          throw Error((getComponentName(type) || 'Unknown') + ".getChildContext(): key \"" + contextKey + "\" is not defined in childContextTypes.");
        }
      }
    }

    {
      var name = getComponentName(type) || 'Unknown';
      checkPropTypes(childContextTypes, childContext, 'child context', name, // In practice, there is one case in which we won't get a stack. It's when
      // somebody calls unstable_renderSubtreeIntoContainer() and we process
      // context from the parent component instance. The stack will be missing
      // because it's outside of the reconciliation, and so the pointer has not
      // been set. This is rare and doesn't matter. We'll also remove that API.
      getCurrentFiberStackInDev);
    }

    return _assign({}, parentContext, {}, childContext);
  }
}

function pushContextProvider(workInProgress) {
  if (disableLegacyContext) {
    return false;
  } else {
    var instance = workInProgress.stateNode; // We push the context as early as possible to ensure stack integrity.
    // If the instance does not exist yet, we will push null at first,
    // and replace it on the stack later when invalidating the context.

    var memoizedMergedChildContext = instance && instance.__reactInternalMemoizedMergedChildContext || emptyContextObject; // Remember the parent context so we can merge with it later.
    // Inherit the parent's did-perform-work value to avoid inadvertently blocking updates.

    previousContext = contextStackCursor.current;
    push(contextStackCursor, memoizedMergedChildContext, workInProgress);
    push(didPerformWorkStackCursor, didPerformWorkStackCursor.current, workInProgress);
    return true;
  }
}

function invalidateContextProvider(workInProgress, type, didChange) {
  if (disableLegacyContext) {
    return;
  } else {
    var instance = workInProgress.stateNode;

    if (!instance) {
      {
        throw Error("Expected to have an instance by this point. This error is likely caused by a bug in React. Please file an issue.");
      }
    }

    if (didChange) {
      // Merge parent and own context.
      // Skip this if we're not updating due to sCU.
      // This avoids unnecessarily recomputing memoized values.
      var mergedContext = processChildContext(workInProgress, type, previousContext);
      instance.__reactInternalMemoizedMergedChildContext = mergedContext; // Replace the old (or empty) context with the new one.
      // It is important to unwind the context in the reverse order.

      pop(didPerformWorkStackCursor, workInProgress);
      pop(contextStackCursor, workInProgress); // Now push the new context and mark that it has changed.

      push(contextStackCursor, mergedContext, workInProgress);
      push(didPerformWorkStackCursor, didChange, workInProgress);
    } else {
      pop(didPerformWorkStackCursor, workInProgress);
      push(didPerformWorkStackCursor, didChange, workInProgress);
    }
  }
}

function findCurrentUnmaskedContext(fiber) {
  if (disableLegacyContext) {
    return emptyContextObject;
  } else {
    // Currently this is only used with renderSubtreeIntoContainer; not sure if it
    // makes sense elsewhere
    if (!(isFiberMounted(fiber) && fiber.tag === ClassComponent)) {
      {
        throw Error("Expected subtree parent to be a mounted class component. This error is likely caused by a bug in React. Please file an issue.");
      }
    }

    var node = fiber;

    do {
      switch (node.tag) {
        case HostRoot:
          return node.stateNode.context;

        case ClassComponent:
          {
            var Component = node.type;

            if (isContextProvider(Component)) {
              return node.stateNode.__reactInternalMemoizedMergedChildContext;
            }

            break;
          }
      }

      node = node.return;
    } while (node !== null);

    {
      {
        throw Error("Found unexpected detached subtree parent. This error is likely caused by a bug in React. Please file an issue.");
      }
    }
  }
}

var LegacyRoot = 0;
var BatchedRoot = 1;
var ConcurrentRoot = 2;

// Intentionally not named imports because Rollup would use dynamic dispatch for
// CommonJS interop named imports.
var Scheduler_runWithPriority = Scheduler.unstable_runWithPriority;
var Scheduler_scheduleCallback = Scheduler.unstable_scheduleCallback;
var Scheduler_cancelCallback = Scheduler.unstable_cancelCallback;
var Scheduler_shouldYield = Scheduler.unstable_shouldYield;
var Scheduler_requestPaint = Scheduler.unstable_requestPaint;
var Scheduler_now = Scheduler.unstable_now;
var Scheduler_getCurrentPriorityLevel = Scheduler.unstable_getCurrentPriorityLevel;
var Scheduler_ImmediatePriority = Scheduler.unstable_ImmediatePriority;
var Scheduler_UserBlockingPriority = Scheduler.unstable_UserBlockingPriority;
var Scheduler_NormalPriority = Scheduler.unstable_NormalPriority;
var Scheduler_LowPriority = Scheduler.unstable_LowPriority;
var Scheduler_IdlePriority = Scheduler.unstable_IdlePriority;

if (enableSchedulerTracing) {
  // Provide explicit error message when production+profiling bundle of e.g.
  // react-dom is used with production (non-profiling) bundle of
  // scheduler/tracing
  if (!(tracing.__interactionsRef != null && tracing.__interactionsRef.current != null)) {
    {
      throw Error("It is not supported to run the profiling version of a renderer (for example, `react-dom/profiling`) without also replacing the `scheduler/tracing` module with `scheduler/tracing-profiling`. Your bundler might have a setting for aliasing both modules. Learn more at http://fb.me/react-profiling");
    }
  }
}

var fakeCallbackNode = {}; // Except for NoPriority, these correspond to Scheduler priorities. We use
// ascending numbers so we can compare them like numbers. They start at 90 to
// avoid clashing with Scheduler's priorities.

var ImmediatePriority = 99;
var UserBlockingPriority$2 = 98;
var NormalPriority = 97;
var LowPriority = 96;
var IdlePriority = 95; // NoPriority is the absence of priority. Also React-only.

var NoPriority = 90;
var shouldYield = Scheduler_shouldYield;
var requestPaint = // Fall back gracefully if we're running an older version of Scheduler.
Scheduler_requestPaint !== undefined ? Scheduler_requestPaint : function () {};
var syncQueue = null;
var immediateQueueCallbackNode = null;
var isFlushingSyncQueue = false;
var initialTimeMs = Scheduler_now(); // If the initial timestamp is reasonably small, use Scheduler's `now` directly.
// This will be the case for modern browsers that support `performance.now`. In
// older browsers, Scheduler falls back to `Date.now`, which returns a Unix
// timestamp. In that case, subtract the module initialization time to simulate
// the behavior of performance.now and keep our times small enough to fit
// within 32 bits.
// TODO: Consider lifting this into Scheduler.

var now = initialTimeMs < 10000 ? Scheduler_now : function () {
  return Scheduler_now() - initialTimeMs;
};
function getCurrentPriorityLevel() {
  switch (Scheduler_getCurrentPriorityLevel()) {
    case Scheduler_ImmediatePriority:
      return ImmediatePriority;

    case Scheduler_UserBlockingPriority:
      return UserBlockingPriority$2;

    case Scheduler_NormalPriority:
      return NormalPriority;

    case Scheduler_LowPriority:
      return LowPriority;

    case Scheduler_IdlePriority:
      return IdlePriority;

    default:
      {
        {
          throw Error("Unknown priority level.");
        }
      }

  }
}

function reactPriorityToSchedulerPriority(reactPriorityLevel) {
  switch (reactPriorityLevel) {
    case ImmediatePriority:
      return Scheduler_ImmediatePriority;

    case UserBlockingPriority$2:
      return Scheduler_UserBlockingPriority;

    case NormalPriority:
      return Scheduler_NormalPriority;

    case LowPriority:
      return Scheduler_LowPriority;

    case IdlePriority:
      return Scheduler_IdlePriority;

    default:
      {
        {
          throw Error("Unknown priority level.");
        }
      }

  }
}

function runWithPriority$2(reactPriorityLevel, fn) {
  var priorityLevel = reactPriorityToSchedulerPriority(reactPriorityLevel);
  return Scheduler_runWithPriority(priorityLevel, fn);
}
function scheduleCallback(reactPriorityLevel, callback, options) {
  var priorityLevel = reactPriorityToSchedulerPriority(reactPriorityLevel);
  return Scheduler_scheduleCallback(priorityLevel, callback, options);
}
function scheduleSyncCallback(callback) {
  // Push this callback into an internal queue. We'll flush these either in
  // the next tick, or earlier if something calls `flushSyncCallbackQueue`.
  if (syncQueue === null) {
    syncQueue = [callback]; // Flush the queue in the next tick, at the earliest.

    immediateQueueCallbackNode = Scheduler_scheduleCallback(Scheduler_ImmediatePriority, flushSyncCallbackQueueImpl);
  } else {
    // Push onto existing queue. Don't need to schedule a callback because
    // we already scheduled one when we created the queue.
    syncQueue.push(callback);
  }

  return fakeCallbackNode;
}
function cancelCallback(callbackNode) {
  if (callbackNode !== fakeCallbackNode) {
    Scheduler_cancelCallback(callbackNode);
  }
}
function flushSyncCallbackQueue() {
  if (immediateQueueCallbackNode !== null) {
    var node = immediateQueueCallbackNode;
    immediateQueueCallbackNode = null;
    Scheduler_cancelCallback(node);
  }

  flushSyncCallbackQueueImpl();
}

function flushSyncCallbackQueueImpl() {
  if (!isFlushingSyncQueue && syncQueue !== null) {
    // Prevent re-entrancy.
    isFlushingSyncQueue = true;
    var i = 0;

    try {
      var _isSync = true;
      var queue = syncQueue;
      runWithPriority$2(ImmediatePriority, function () {
        for (; i < queue.length; i++) {
          var callback = queue[i];

          do {
            callback = callback(_isSync);
          } while (callback !== null);
        }
      });
      syncQueue = null;
    } catch (error) {
      // If something throws, leave the remaining callbacks on the queue.
      if (syncQueue !== null) {
        syncQueue = syncQueue.slice(i + 1);
      } // Resume flushing in the next tick


      Scheduler_scheduleCallback(Scheduler_ImmediatePriority, flushSyncCallbackQueue);
      throw error;
    } finally {
      isFlushingSyncQueue = false;
    }
  }
}

var NoMode = 0;
var StrictMode = 1; // TODO: Remove BatchedMode and ConcurrentMode by reading from the root
// tag instead

var BatchedMode = 2;
var ConcurrentMode = 4;
var ProfileMode = 8;

// Max 31 bit integer. The max integer size in V8 for 32-bit systems.
// Math.pow(2, 30) - 1
// 0b111111111111111111111111111111
var MAX_SIGNED_31_BIT_INT = 1073741823;

var NoWork = 0; // TODO: Think of a better name for Never. The key difference with Idle is that
// Never work can be committed in an inconsistent state without tearing the UI.
// The main example is offscreen content, like a hidden subtree. So one possible
// name is Offscreen. However, it also includes dehydrated Suspense boundaries,
// which are inconsistent in the sense that they haven't finished yet, but
// aren't visibly inconsistent because the server rendered HTML matches what the
// hydrated tree would look like.

var Never = 1; // Idle is slightly higher priority than Never. It must completely finish in
// order to be consistent.

var Idle = 2; // Continuous Hydration is a moving priority. It is slightly higher than Idle
// and is used to increase priority of hover targets. It is increasing with
// each usage so that last always wins.

var ContinuousHydration = 3;
var Sync = MAX_SIGNED_31_BIT_INT;
var Batched = Sync - 1;
var UNIT_SIZE = 10;
var MAGIC_NUMBER_OFFSET = Batched - 1; // 1 unit of expiration time represents 10ms.

function msToExpirationTime(ms) {
  // Always add an offset so that we don't clash with the magic number for NoWork.
  return MAGIC_NUMBER_OFFSET - (ms / UNIT_SIZE | 0);
}
function expirationTimeToMs(expirationTime) {
  return (MAGIC_NUMBER_OFFSET - expirationTime) * UNIT_SIZE;
}

function ceiling(num, precision) {
  return ((num / precision | 0) + 1) * precision;
}

function computeExpirationBucket(currentTime, expirationInMs, bucketSizeMs) {
  return MAGIC_NUMBER_OFFSET - ceiling(MAGIC_NUMBER_OFFSET - currentTime + expirationInMs / UNIT_SIZE, bucketSizeMs / UNIT_SIZE);
} // TODO: This corresponds to Scheduler's NormalPriority, not LowPriority. Update
// the names to reflect.


var LOW_PRIORITY_EXPIRATION = 5000;
var LOW_PRIORITY_BATCH_SIZE = 250;
function computeAsyncExpiration(currentTime) {
  return computeExpirationBucket(currentTime, LOW_PRIORITY_EXPIRATION, LOW_PRIORITY_BATCH_SIZE);
}
function computeSuspenseExpiration(currentTime, timeoutMs) {
  // TODO: Should we warn if timeoutMs is lower than the normal pri expiration time?
  return computeExpirationBucket(currentTime, timeoutMs, LOW_PRIORITY_BATCH_SIZE);
} // We intentionally set a higher expiration time for interactive updates in
// dev than in production.
//
// If the main thread is being blocked so long that you hit the expiration,
// it's a problem that could be solved with better scheduling.
//
// People will be more likely to notice this and fix it with the long
// expiration time in development.
//
// In production we opt for better UX at the risk of masking scheduling
// problems, by expiring fast.

var HIGH_PRIORITY_EXPIRATION = 500;
var HIGH_PRIORITY_BATCH_SIZE = 100;
function computeInteractiveExpiration(currentTime) {
  return computeExpirationBucket(currentTime, HIGH_PRIORITY_EXPIRATION, HIGH_PRIORITY_BATCH_SIZE);
}
function computeContinuousHydrationExpiration(currentTime) {
  // Each time we ask for a new one of these we increase the priority.
  // This ensures that the last one always wins since we can't deprioritize
  // once we've scheduled work already.
  return ContinuousHydration++;
}
function inferPriorityFromExpirationTime(currentTime, expirationTime) {
  if (expirationTime === Sync) {
    return ImmediatePriority;
  }

  if (expirationTime === Never || expirationTime === Idle) {
    return IdlePriority;
  }

  var msUntil = expirationTimeToMs(expirationTime) - expirationTimeToMs(currentTime);

  if (msUntil <= 0) {
    return ImmediatePriority;
  }

  if (msUntil <= HIGH_PRIORITY_EXPIRATION + HIGH_PRIORITY_BATCH_SIZE) {
    return UserBlockingPriority$2;
  }

  if (msUntil <= LOW_PRIORITY_EXPIRATION + LOW_PRIORITY_BATCH_SIZE) {
    return NormalPriority;
  } // TODO: Handle LowPriority
  // Assume anything lower has idle priority


  return IdlePriority;
}

/**
 * Forked from fbjs/warning:
 * https://github.com/facebook/fbjs/blob/e66ba20ad5be433eb54423f2b097d829324d9de6/packages/fbjs/src/__forks__/warning.js
 *
 * Only change is we use console.warn instead of console.error,
 * and do nothing when 'console' is not supported.
 * This really simplifies the code.
 * ---
 * Similar to invariant but only logs a warning if the condition is not met.
 * This can be used to log issues in development environments in critical
 * paths. Removing the logging code for production environments will keep the
 * same logic and follow the same code paths.
 */
var lowPriorityWarningWithoutStack = function () {};

{
  var printWarning = function (format) {
    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      args[_key - 1] = arguments[_key];
    }

    var argIndex = 0;
    var message = 'Warning: ' + format.replace(/%s/g, function () {
      return args[argIndex++];
    });

    if (typeof console !== 'undefined') {
      console.warn(message);
    }

    try {
      // --- Welcome to debugging React ---
      // This error was thrown as a convenience so that you can use this stack
      // to find the callsite that caused this warning to fire.
      throw new Error(message);
    } catch (x) {}
  };

  lowPriorityWarningWithoutStack = function (condition, format) {
    if (format === undefined) {
      throw new Error('`lowPriorityWarningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument');
    }

    if (!condition) {
      for (var _len2 = arguments.length, args = new Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
        args[_key2 - 2] = arguments[_key2];
      }

      printWarning.apply(void 0, [format].concat(args));
    }
  };
}

var lowPriorityWarningWithoutStack$1 = lowPriorityWarningWithoutStack;

var ReactStrictModeWarnings = {
  recordUnsafeLifecycleWarnings: function (fiber, instance) {},
  flushPendingUnsafeLifecycleWarnings: function () {},
  recordLegacyContextWarning: function (fiber, instance) {},
  flushLegacyContextWarning: function () {},
  discardPendingWarnings: function () {}
};

{
  var findStrictRoot = function (fiber) {
    var maybeStrictRoot = null;
    var node = fiber;

    while (node !== null) {
      if (node.mode & StrictMode) {
        maybeStrictRoot = node;
      }

      node = node.return;
    }

    return maybeStrictRoot;
  };

  var setToSortedString = function (set) {
    var array = [];
    set.forEach(function (value) {
      array.push(value);
    });
    return array.sort().join(', ');
  };

  var pendingComponentWillMountWarnings = [];
  var pendingUNSAFE_ComponentWillMountWarnings = [];
  var pendingComponentWillReceivePropsWarnings = [];
  var pendingUNSAFE_ComponentWillReceivePropsWarnings = [];
  var pendingComponentWillUpdateWarnings = [];
  var pendingUNSAFE_ComponentWillUpdateWarnings = []; // Tracks components we have already warned about.

  var didWarnAboutUnsafeLifecycles = new Set();

  ReactStrictModeWarnings.recordUnsafeLifecycleWarnings = function (fiber, instance) {
    // Dedup strategy: Warn once per component.
    if (didWarnAboutUnsafeLifecycles.has(fiber.type)) {
      return;
    }

    if (typeof instance.componentWillMount === 'function' && // Don't warn about react-lifecycles-compat polyfilled components.
    instance.componentWillMount.__suppressDeprecationWarning !== true) {
      pendingComponentWillMountWarnings.push(fiber);
    }

    if (fiber.mode & StrictMode && typeof instance.UNSAFE_componentWillMount === 'function') {
      pendingUNSAFE_ComponentWillMountWarnings.push(fiber);
    }

    if (typeof instance.componentWillReceiveProps === 'function' && instance.componentWillReceiveProps.__suppressDeprecationWarning !== true) {
      pendingComponentWillReceivePropsWarnings.push(fiber);
    }

    if (fiber.mode & StrictMode && typeof instance.UNSAFE_componentWillReceiveProps === 'function') {
      pendingUNSAFE_ComponentWillReceivePropsWarnings.push(fiber);
    }

    if (typeof instance.componentWillUpdate === 'function' && instance.componentWillUpdate.__suppressDeprecationWarning !== true) {
      pendingComponentWillUpdateWarnings.push(fiber);
    }

    if (fiber.mode & StrictMode && typeof instance.UNSAFE_componentWillUpdate === 'function') {
      pendingUNSAFE_ComponentWillUpdateWarnings.push(fiber);
    }
  };

  ReactStrictModeWarnings.flushPendingUnsafeLifecycleWarnings = function () {
    // We do an initial pass to gather component names
    var componentWillMountUniqueNames = new Set();

    if (pendingComponentWillMountWarnings.length > 0) {
      pendingComponentWillMountWarnings.forEach(function (fiber) {
        componentWillMountUniqueNames.add(getComponentName(fiber.type) || 'Component');
        didWarnAboutUnsafeLifecycles.add(fiber.type);
      });
      pendingComponentWillMountWarnings = [];
    }

    var UNSAFE_componentWillMountUniqueNames = new Set();

    if (pendingUNSAFE_ComponentWillMountWarnings.length > 0) {
      pendingUNSAFE_ComponentWillMountWarnings.forEach(function (fiber) {
        UNSAFE_componentWillMountUniqueNames.add(getComponentName(fiber.type) || 'Component');
        didWarnAboutUnsafeLifecycles.add(fiber.type);
      });
      pendingUNSAFE_ComponentWillMountWarnings = [];
    }

    var componentWillReceivePropsUniqueNames = new Set();

    if (pendingComponentWillReceivePropsWarnings.length > 0) {
      pendingComponentWillReceivePropsWarnings.forEach(function (fiber) {
        componentWillReceivePropsUniqueNames.add(getComponentName(fiber.type) || 'Component');
        didWarnAboutUnsafeLifecycles.add(fiber.type);
      });
      pendingComponentWillReceivePropsWarnings = [];
    }

    var UNSAFE_componentWillReceivePropsUniqueNames = new Set();

    if (pendingUNSAFE_ComponentWillReceivePropsWarnings.length > 0) {
      pendingUNSAFE_ComponentWillReceivePropsWarnings.forEach(function (fiber) {
        UNSAFE_componentWillReceivePropsUniqueNames.add(getComponentName(fiber.type) || 'Component');
        didWarnAboutUnsafeLifecycles.add(fiber.type);
      });
      pendingUNSAFE_ComponentWillReceivePropsWarnings = [];
    }

    var componentWillUpdateUniqueNames = new Set();

    if (pendingComponentWillUpdateWarnings.length > 0) {
      pendingComponentWillUpdateWarnings.forEach(function (fiber) {
        componentWillUpdateUniqueNames.add(getComponentName(fiber.type) || 'Component');
        didWarnAboutUnsafeLifecycles.add(fiber.type);
      });
      pendingComponentWillUpdateWarnings = [];
    }

    var UNSAFE_componentWillUpdateUniqueNames = new Set();

    if (pendingUNSAFE_ComponentWillUpdateWarnings.length > 0) {
      pendingUNSAFE_ComponentWillUpdateWarnings.forEach(function (fiber) {
        UNSAFE_componentWillUpdateUniqueNames.add(getComponentName(fiber.type) || 'Component');
        didWarnAboutUnsafeLifecycles.add(fiber.type);
      });
      pendingUNSAFE_ComponentWillUpdateWarnings = [];
    } // Finally, we flush all the warnings
    // UNSAFE_ ones before the deprecated ones, since they'll be 'louder'


    if (UNSAFE_componentWillMountUniqueNames.size > 0) {
      var sortedNames = setToSortedString(UNSAFE_componentWillMountUniqueNames);
      warningWithoutStack$1(false, 'Using UNSAFE_componentWillMount in strict mode is not recommended and may indicate bugs in your code. ' + 'See https://fb.me/react-unsafe-component-lifecycles for details.\n\n' + '* Move code with side effects to componentDidMount, and set initial state in the constructor.\n' + '\nPlease update the following components: %s', sortedNames);
    }

    if (UNSAFE_componentWillReceivePropsUniqueNames.size > 0) {
      var _sortedNames = setToSortedString(UNSAFE_componentWillReceivePropsUniqueNames);

      warningWithoutStack$1(false, 'Using UNSAFE_componentWillReceiveProps in strict mode is not recommended ' + 'and may indicate bugs in your code. ' + 'See https://fb.me/react-unsafe-component-lifecycles for details.\n\n' + '* Move data fetching code or side effects to componentDidUpdate.\n' + "* If you're updating state whenever props change, " + 'refactor your code to use memoization techniques or move it to ' + 'static getDerivedStateFromProps. Learn more at: https://fb.me/react-derived-state\n' + '\nPlease update the following components: %s', _sortedNames);
    }

    if (UNSAFE_componentWillUpdateUniqueNames.size > 0) {
      var _sortedNames2 = setToSortedString(UNSAFE_componentWillUpdateUniqueNames);

      warningWithoutStack$1(false, 'Using UNSAFE_componentWillUpdate in strict mode is not recommended ' + 'and may indicate bugs in your code. ' + 'See https://fb.me/react-unsafe-component-lifecycles for details.\n\n' + '* Move data fetching code or side effects to componentDidUpdate.\n' + '\nPlease update the following components: %s', _sortedNames2);
    }

    if (componentWillMountUniqueNames.size > 0) {
      var _sortedNames3 = setToSortedString(componentWillMountUniqueNames);

      lowPriorityWarningWithoutStack$1(false, 'componentWillMount has been renamed, and is not recommended for use. ' + 'See https://fb.me/react-unsafe-component-lifecycles for details.\n\n' + '* Move code with side effects to componentDidMount, and set initial state in the constructor.\n' + '* Rename componentWillMount to UNSAFE_componentWillMount to suppress ' + 'this warning in non-strict mode. In React 17.x, only the UNSAFE_ name will work. ' + 'To rename all deprecated lifecycles to their new names, you can run ' + '`npx react-codemod rename-unsafe-lifecycles` in your project source folder.\n' + '\nPlease update the following components: %s', _sortedNames3);
    }

    if (componentWillReceivePropsUniqueNames.size > 0) {
      var _sortedNames4 = setToSortedString(componentWillReceivePropsUniqueNames);

      lowPriorityWarningWithoutStack$1(false, 'componentWillReceiveProps has been renamed, and is not recommended for use. ' + 'See https://fb.me/react-unsafe-component-lifecycles for details.\n\n' + '* Move data fetching code or side effects to componentDidUpdate.\n' + "* If you're updating state whenever props change, refactor your " + 'code to use memoization techniques or move it to ' + 'static getDerivedStateFromProps. Learn more at: https://fb.me/react-derived-state\n' + '* Rename componentWillReceiveProps to UNSAFE_componentWillReceiveProps to suppress ' + 'this warning in non-strict mode. In React 17.x, only the UNSAFE_ name will work. ' + 'To rename all deprecated lifecycles to their new names, you can run ' + '`npx react-codemod rename-unsafe-lifecycles` in your project source folder.\n' + '\nPlease update the following components: %s', _sortedNames4);
    }

    if (componentWillUpdateUniqueNames.size > 0) {
      var _sortedNames5 = setToSortedString(componentWillUpdateUniqueNames);

      lowPriorityWarningWithoutStack$1(false, 'componentWillUpdate has been renamed, and is not recommended for use. ' + 'See https://fb.me/react-unsafe-component-lifecycles for details.\n\n' + '* Move data fetching code or side effects to componentDidUpdate.\n' + '* Rename componentWillUpdate to UNSAFE_componentWillUpdate to suppress ' + 'this warning in non-strict mode. In React 17.x, only the UNSAFE_ name will work. ' + 'To rename all deprecated lifecycles to their new names, you can run ' + '`npx react-codemod rename-unsafe-lifecycles` in your project source folder.\n' + '\nPlease update the following components: %s', _sortedNames5);
    }
  };

  var pendingLegacyContextWarning = new Map(); // Tracks components we have already warned about.

  var didWarnAboutLegacyContext = new Set();

  ReactStrictModeWarnings.recordLegacyContextWarning = function (fiber, instance) {
    var strictRoot = findStrictRoot(fiber);

    if (strictRoot === null) {
      warningWithoutStack$1(false, 'Expected to find a StrictMode component in a strict mode tree. ' + 'This error is likely caused by a bug in React. Please file an issue.');
      return;
    } // Dedup strategy: Warn once per component.


    if (didWarnAboutLegacyContext.has(fiber.type)) {
      return;
    }

    var warningsForRoot = pendingLegacyContextWarning.get(strictRoot);

    if (fiber.type.contextTypes != null || fiber.type.childContextTypes != null || instance !== null && typeof instance.getChildContext === 'function') {
      if (warningsForRoot === undefined) {
        warningsForRoot = [];
        pendingLegacyContextWarning.set(strictRoot, warningsForRoot);
      }

      warningsForRoot.push(fiber);
    }
  };

  ReactStrictModeWarnings.flushLegacyContextWarning = function () {
    pendingLegacyContextWarning.forEach(function (fiberArray, strictRoot) {
      var uniqueNames = new Set();
      fiberArray.forEach(function (fiber) {
        uniqueNames.add(getComponentName(fiber.type) || 'Component');
        didWarnAboutLegacyContext.add(fiber.type);
      });
      var sortedNames = setToSortedString(uniqueNames);
      var strictRootComponentStack = getStackByFiberInDevAndProd(strictRoot);
      warningWithoutStack$1(false, 'Legacy context API has been detected within a strict-mode tree.' + '\n\nThe old API will be supported in all 16.x releases, but applications ' + 'using it should migrate to the new version.' + '\n\nPlease update the following components: %s' + '\n\nLearn more about this warning here: https://fb.me/react-legacy-context' + '%s', sortedNames, strictRootComponentStack);
    });
  };

  ReactStrictModeWarnings.discardPendingWarnings = function () {
    pendingComponentWillMountWarnings = [];
    pendingUNSAFE_ComponentWillMountWarnings = [];
    pendingComponentWillReceivePropsWarnings = [];
    pendingUNSAFE_ComponentWillReceivePropsWarnings = [];
    pendingComponentWillUpdateWarnings = [];
    pendingUNSAFE_ComponentWillUpdateWarnings = [];
    pendingLegacyContextWarning = new Map();
  };
}

var resolveFamily = null; // $FlowFixMe Flow gets confused by a WeakSet feature check below.

var failedBoundaries = null;
var setRefreshHandler = function (handler) {
  {
    resolveFamily = handler;
  }
};
function resolveFunctionForHotReloading(type) {
  {
    if (resolveFamily === null) {
      // Hot reloading is disabled.
      return type;
    }

    var family = resolveFamily(type);

    if (family === undefined) {
      return type;
    } // Use the latest known implementation.


    return family.current;
  }
}
function resolveClassForHotReloading(type) {
  // No implementation differences.
  return resolveFunctionForHotReloading(type);
}
function resolveForwardRefForHotReloading(type) {
  {
    if (resolveFamily === null) {
      // Hot reloading is disabled.
      return type;
    }

    var family = resolveFamily(type);

    if (family === undefined) {
      // Check if we're dealing with a real forwardRef. Don't want to crash early.
      if (type !== null && type !== undefined && typeof type.render === 'function') {
        // ForwardRef is special because its resolved .type is an object,
        // but it's possible that we only have its inner render function in the map.
        // If that inner render function is different, we'll build a new forwardRef type.
        var currentRender = resolveFunctionForHotReloading(type.render);

        if (type.render !== currentRender) {
          var syntheticType = {
            $$typeof: REACT_FORWARD_REF_TYPE,
            render: currentRender
          };

          if (type.displayName !== undefined) {
            syntheticType.displayName = type.displayName;
          }

          return syntheticType;
        }
      }

      return type;
    } // Use the latest known implementation.


    return family.current;
  }
}
function isCompatibleFamilyForHotReloading(fiber, element) {
  {
    if (resolveFamily === null) {
      // Hot reloading is disabled.
      return false;
    }

    var prevType = fiber.elementType;
    var nextType = element.type; // If we got here, we know types aren't === equal.

    var needsCompareFamilies = false;
    var $$typeofNextType = typeof nextType === 'object' && nextType !== null ? nextType.$$typeof : null;

    switch (fiber.tag) {
      case ClassComponent:
        {
          if (typeof nextType === 'function') {
            needsCompareFamilies = true;
          }

          break;
        }

      case FunctionComponent:
        {
          if (typeof nextType === 'function') {
            needsCompareFamilies = true;
          } else if ($$typeofNextType === REACT_LAZY_TYPE) {
            // We don't know the inner type yet.
            // We're going to assume that the lazy inner type is stable,
            // and so it is sufficient to avoid reconciling it away.
            // We're not going to unwrap or actually use the new lazy type.
            needsCompareFamilies = true;
          }

          break;
        }

      case ForwardRef:
        {
          if ($$typeofNextType === REACT_FORWARD_REF_TYPE) {
            needsCompareFamilies = true;
          } else if ($$typeofNextType === REACT_LAZY_TYPE) {
            needsCompareFamilies = true;
          }

          break;
        }

      case MemoComponent:
      case SimpleMemoComponent:
        {
          if ($$typeofNextType === REACT_MEMO_TYPE) {
            // TODO: if it was but can no longer be simple,
            // we shouldn't set this.
            needsCompareFamilies = true;
          } else if ($$typeofNextType === REACT_LAZY_TYPE) {
            needsCompareFamilies = true;
          }

          break;
        }

      default:
        return false;
    } // Check if both types have a family and it's the same one.


    if (needsCompareFamilies) {
      // Note: memo() and forwardRef() we'll compare outer rather than inner type.
      // This means both of them need to be registered to preserve state.
      // If we unwrapped and compared the inner types for wrappers instead,
      // then we would risk falsely saying two separate memo(Foo)
      // calls are equivalent because they wrap the same Foo function.
      var prevFamily = resolveFamily(prevType);

      if (prevFamily !== undefined && prevFamily === resolveFamily(nextType)) {
        return true;
      }
    }

    return false;
  }
}
function markFailedErrorBoundaryForHotReloading(fiber) {
  {
    if (resolveFamily === null) {
      // Hot reloading is disabled.
      return;
    }

    if (typeof WeakSet !== 'function') {
      return;
    }

    if (failedBoundaries === null) {
      failedBoundaries = new WeakSet();
    }

    failedBoundaries.add(fiber);
  }
}
var scheduleRefresh = function (root, update) {
  {
    if (resolveFamily === null) {
      // Hot reloading is disabled.
      return;
    }

    var staleFamilies = update.staleFamilies,
        updatedFamilies = update.updatedFamilies;
    flushPassiveEffects();
    flushSync(function () {
      scheduleFibersWithFamiliesRecursively(root.current, updatedFamilies, staleFamilies);
    });
  }
};
var scheduleRoot = function (root, element) {
  {
    if (root.context !== emptyContextObject) {
      // Super edge case: root has a legacy _renderSubtree context
      // but we don't know the parentComponent so we can't pass it.
      // Just ignore. We'll delete this with _renderSubtree code path later.
      return;
    }

    flushPassiveEffects();
    syncUpdates(function () {
      updateContainer(element, root, null, null);
    });
  }
};

function scheduleFibersWithFamiliesRecursively(fiber, updatedFamilies, staleFamilies) {
  {
    var alternate = fiber.alternate,
        child = fiber.child,
        sibling = fiber.sibling,
        tag = fiber.tag,
        type = fiber.type;
    var candidateType = null;

    switch (tag) {
      case FunctionComponent:
      case SimpleMemoComponent:
      case ClassComponent:
        candidateType = type;
        break;

      case ForwardRef:
        candidateType = type.render;
        break;

      default:
        break;
    }

    if (resolveFamily === null) {
      throw new Error('Expected resolveFamily to be set during hot reload.');
    }

    var needsRender = false;
    var needsRemount = false;

    if (candidateType !== null) {
      var family = resolveFamily(candidateType);

      if (family !== undefined) {
        if (staleFamilies.has(family)) {
          needsRemount = true;
        } else if (updatedFamilies.has(family)) {
          if (tag === ClassComponent) {
            needsRemount = true;
          } else {
            needsRender = true;
          }
        }
      }
    }

    if (failedBoundaries !== null) {
      if (failedBoundaries.has(fiber) || alternate !== null && failedBoundaries.has(alternate)) {
        needsRemount = true;
      }
    }

    if (needsRemount) {
      fiber._debugNeedsRemount = true;
    }

    if (needsRemount || needsRender) {
      scheduleWork(fiber, Sync);
    }

    if (child !== null && !needsRemount) {
      scheduleFibersWithFamiliesRecursively(child, updatedFamilies, staleFamilies);
    }

    if (sibling !== null) {
      scheduleFibersWithFamiliesRecursively(sibling, updatedFamilies, staleFamilies);
    }
  }
}

var findHostInstancesForRefresh = function (root, families) {
  {
    var hostInstances = new Set();
    var types = new Set(families.map(function (family) {
      return family.current;
    }));
    findHostInstancesForMatchingFibersRecursively(root.current, types, hostInstances);
    return hostInstances;
  }
};

function findHostInstancesForMatchingFibersRecursively(fiber, types, hostInstances) {
  {
    var child = fiber.child,
        sibling = fiber.sibling,
        tag = fiber.tag,
        type = fiber.type;
    var candidateType = null;

    switch (tag) {
      case FunctionComponent:
      case SimpleMemoComponent:
      case ClassComponent:
        candidateType = type;
        break;

      case ForwardRef:
        candidateType = type.render;
        break;

      default:
        break;
    }

    var didMatch = false;

    if (candidateType !== null) {
      if (types.has(candidateType)) {
        didMatch = true;
      }
    }

    if (didMatch) {
      // We have a match. This only drills down to the closest host components.
      // There's no need to search deeper because for the purpose of giving
      // visual feedback, "flashing" outermost parent rectangles is sufficient.
      findHostInstancesForFiberShallowly(fiber, hostInstances);
    } else {
      // If there's no match, maybe there will be one further down in the child tree.
      if (child !== null) {
        findHostInstancesForMatchingFibersRecursively(child, types, hostInstances);
      }
    }

    if (sibling !== null) {
      findHostInstancesForMatchingFibersRecursively(sibling, types, hostInstances);
    }
  }
}

function findHostInstancesForFiberShallowly(fiber, hostInstances) {
  {
    var foundHostInstances = findChildHostInstancesForFiberShallowly(fiber, hostInstances);

    if (foundHostInstances) {
      return;
    } // If we didn't find any host children, fallback to closest host parent.


    var node = fiber;

    while (true) {
      switch (node.tag) {
        case HostComponent:
          hostInstances.add(node.stateNode);
          return;

        case HostPortal:
          hostInstances.add(node.stateNode.containerInfo);
          return;

        case HostRoot:
          hostInstances.add(node.stateNode.containerInfo);
          return;
      }

      if (node.return === null) {
        throw new Error('Expected to reach root first.');
      }

      node = node.return;
    }
  }
}

function findChildHostInstancesForFiberShallowly(fiber, hostInstances) {
  {
    var node = fiber;
    var foundHostInstances = false;

    while (true) {
      if (node.tag === HostComponent) {
        // We got a match.
        foundHostInstances = true;
        hostInstances.add(node.stateNode); // There may still be more, so keep searching.
      } else if (node.child !== null) {
        node.child.return = node;
        node = node.child;
        continue;
      }

      if (node === fiber) {
        return foundHostInstances;
      }

      while (node.sibling === null) {
        if (node.return === null || node.return === fiber) {
          return foundHostInstances;
        }

        node = node.return;
      }

      node.sibling.return = node.return;
      node = node.sibling;
    }
  }

  return false;
}

function resolveDefaultProps(Component, baseProps) {
  if (Component && Component.defaultProps) {
    // Resolve default props. Taken from ReactElement
    var props = _assign({}, baseProps);

    var defaultProps = Component.defaultProps;

    for (var propName in defaultProps) {
      if (props[propName] === undefined) {
        props[propName] = defaultProps[propName];
      }
    }

    return props;
  }

  return baseProps;
}
function readLazyComponentType(lazyComponent) {
  initializeLazyComponentType(lazyComponent);

  if (lazyComponent._status !== Resolved) {
    throw lazyComponent._result;
  }

  return lazyComponent._result;
}

var valueCursor = createCursor(null);
var rendererSigil;

{
  // Use this to detect multiple renderers using the same context
  rendererSigil = {};
}

var currentlyRenderingFiber = null;
var lastContextDependency = null;
var lastContextWithAllBitsObserved = null;
var isDisallowedContextReadInDEV = false;
function resetContextDependencies() {
  // This is called right before React yields execution, to ensure `readContext`
  // cannot be called outside the render phase.
  currentlyRenderingFiber = null;
  lastContextDependency = null;
  lastContextWithAllBitsObserved = null;

  {
    isDisallowedContextReadInDEV = false;
  }
}
function enterDisallowedContextReadInDEV() {
  {
    isDisallowedContextReadInDEV = true;
  }
}
function exitDisallowedContextReadInDEV() {
  {
    isDisallowedContextReadInDEV = false;
  }
}
function pushProvider(providerFiber, nextValue) {
  var context = providerFiber.type._context;

  if (isPrimaryRenderer) {
    push(valueCursor, context._currentValue, providerFiber);
    context._currentValue = nextValue;

    {
      !(context._currentRenderer === undefined || context._currentRenderer === null || context._currentRenderer === rendererSigil) ? warningWithoutStack$1(false, 'Detected multiple renderers concurrently rendering the ' + 'same context provider. This is currently unsupported.') : void 0;
      context._currentRenderer = rendererSigil;
    }
  } else {
    push(valueCursor, context._currentValue2, providerFiber);
    context._currentValue2 = nextValue;

    {
      !(context._currentRenderer2 === undefined || context._currentRenderer2 === null || context._currentRenderer2 === rendererSigil) ? warningWithoutStack$1(false, 'Detected multiple renderers concurrently rendering the ' + 'same context provider. This is currently unsupported.') : void 0;
      context._currentRenderer2 = rendererSigil;
    }
  }
}
function popProvider(providerFiber) {
  var currentValue = valueCursor.current;
  pop(valueCursor, providerFiber);
  var context = providerFiber.type._context;

  if (isPrimaryRenderer) {
    context._currentValue = currentValue;
  } else {
    context._currentValue2 = currentValue;
  }
}
function calculateChangedBits(context, newValue, oldValue) {
  if (is$1(oldValue, newValue)) {
    // No change
    return 0;
  } else {
    var changedBits = typeof context._calculateChangedBits === 'function' ? context._calculateChangedBits(oldValue, newValue) : MAX_SIGNED_31_BIT_INT;

    {
      !((changedBits & MAX_SIGNED_31_BIT_INT) === changedBits) ? warning$1(false, 'calculateChangedBits: Expected the return value to be a ' + '31-bit integer. Instead received: %s', changedBits) : void 0;
    }

    return changedBits | 0;
  }
}
function scheduleWorkOnParentPath(parent, renderExpirationTime) {
  // Update the child expiration time of all the ancestors, including
  // the alternates.
  var node = parent;

  while (node !== null) {
    var alternate = node.alternate;

    if (node.childExpirationTime < renderExpirationTime) {
      node.childExpirationTime = renderExpirationTime;

      if (alternate !== null && alternate.childExpirationTime < renderExpirationTime) {
        alternate.childExpirationTime = renderExpirationTime;
      }
    } else if (alternate !== null && alternate.childExpirationTime < renderExpirationTime) {
      alternate.childExpirationTime = renderExpirationTime;
    } else {
      // Neither alternate was updated, which means the rest of the
      // ancestor path already has sufficient priority.
      break;
    }

    node = node.return;
  }
}
function propagateContextChange(workInProgress, context, changedBits, renderExpirationTime) {
  var fiber = workInProgress.child;

  if (fiber !== null) {
    // Set the return pointer of the child to the work-in-progress fiber.
    fiber.return = workInProgress;
  }

  while (fiber !== null) {
    var nextFiber = void 0; // Visit this fiber.

    var list = fiber.dependencies;

    if (list !== null) {
      nextFiber = fiber.child;
      var dependency = list.firstContext;

      while (dependency !== null) {
        // Check if the context matches.
        if (dependency.context === context && (dependency.observedBits & changedBits) !== 0) {
          // Match! Schedule an update on this fiber.
          if (fiber.tag === ClassComponent) {
            // Schedule a force update on the work-in-progress.
            var update = createUpdate(renderExpirationTime, null);
            update.tag = ForceUpdate; // TODO: Because we don't have a work-in-progress, this will add the
            // update to the current fiber, too, which means it will persist even if
            // this render is thrown away. Since it's a race condition, not sure it's
            // worth fixing.

            enqueueUpdate(fiber, update);
          }

          if (fiber.expirationTime < renderExpirationTime) {
            fiber.expirationTime = renderExpirationTime;
          }

          var alternate = fiber.alternate;

          if (alternate !== null && alternate.expirationTime < renderExpirationTime) {
            alternate.expirationTime = renderExpirationTime;
          }

          scheduleWorkOnParentPath(fiber.return, renderExpirationTime); // Mark the expiration time on the list, too.

          if (list.expirationTime < renderExpirationTime) {
            list.expirationTime = renderExpirationTime;
          } // Since we already found a match, we can stop traversing the
          // dependency list.


          break;
        }

        dependency = dependency.next;
      }
    } else if (fiber.tag === ContextProvider) {
      // Don't scan deeper if this is a matching provider
      nextFiber = fiber.type === workInProgress.type ? null : fiber.child;
    } else if (enableSuspenseServerRenderer && fiber.tag === DehydratedFragment) {
      // If a dehydrated suspense bounudary is in this subtree, we don't know
      // if it will have any context consumers in it. The best we can do is
      // mark it as having updates.
      var parentSuspense = fiber.return;

      if (!(parentSuspense !== null)) {
        {
          throw Error("We just came from a parent so we must have had a parent. This is a bug in React.");
        }
      }

      if (parentSuspense.expirationTime < renderExpirationTime) {
        parentSuspense.expirationTime = renderExpirationTime;
      }

      var _alternate = parentSuspense.alternate;

      if (_alternate !== null && _alternate.expirationTime < renderExpirationTime) {
        _alternate.expirationTime = renderExpirationTime;
      } // This is intentionally passing this fiber as the parent
      // because we want to schedule this fiber as having work
      // on its children. We'll use the childExpirationTime on
      // this fiber to indicate that a context has changed.


      scheduleWorkOnParentPath(parentSuspense, renderExpirationTime);
      nextFiber = fiber.sibling;
    } else {
      // Traverse down.
      nextFiber = fiber.child;
    }

    if (nextFiber !== null) {
      // Set the return pointer of the child to the work-in-progress fiber.
      nextFiber.return = fiber;
    } else {
      // No child. Traverse to next sibling.
      nextFiber = fiber;

      while (nextFiber !== null) {
        if (nextFiber === workInProgress) {
          // We're back to the root of this subtree. Exit.
          nextFiber = null;
          break;
        }

        var sibling = nextFiber.sibling;

        if (sibling !== null) {
          // Set the return pointer of the sibling to the work-in-progress fiber.
          sibling.return = nextFiber.return;
          nextFiber = sibling;
          break;
        } // No more siblings. Traverse up.


        nextFiber = nextFiber.return;
      }
    }

    fiber = nextFiber;
  }
}
function prepareToReadContext(workInProgress, renderExpirationTime) {
  currentlyRenderingFiber = workInProgress;
  lastContextDependency = null;
  lastContextWithAllBitsObserved = null;
  var dependencies = workInProgress.dependencies;

  if (dependencies !== null) {
    var firstContext = dependencies.firstContext;

    if (firstContext !== null) {
      if (dependencies.expirationTime >= renderExpirationTime) {
        // Context list has a pending update. Mark that this fiber performed work.
        markWorkInProgressReceivedUpdate();
      } // Reset the work-in-progress list


      dependencies.firstContext = null;
    }
  }
}
function readContext(context, observedBits) {
  {
    // This warning would fire if you read context inside a Hook like useMemo.
    // Unlike the class check below, it's not enforced in production for perf.
    !!isDisallowedContextReadInDEV ? warning$1(false, 'Context can only be read while React is rendering. ' + 'In classes, you can read it in the render method or getDerivedStateFromProps. ' + 'In function components, you can read it directly in the function body, but not ' + 'inside Hooks like useReducer() or useMemo().') : void 0;
  }

  if (lastContextWithAllBitsObserved === context) {// Nothing to do. We already observe everything in this context.
  } else if (observedBits === false || observedBits === 0) {// Do not observe any updates.
  } else {
    var resolvedObservedBits; // Avoid deopting on observable arguments or heterogeneous types.

    if (typeof observedBits !== 'number' || observedBits === MAX_SIGNED_31_BIT_INT) {
      // Observe all updates.
      lastContextWithAllBitsObserved = context;
      resolvedObservedBits = MAX_SIGNED_31_BIT_INT;
    } else {
      resolvedObservedBits = observedBits;
    }

    var contextItem = {
      context: context,
      observedBits: resolvedObservedBits,
      next: null
    };

    if (lastContextDependency === null) {
      if (!(currentlyRenderingFiber !== null)) {
        {
          throw Error("Context can only be read while React is rendering. In classes, you can read it in the render method or getDerivedStateFromProps. In function components, you can read it directly in the function body, but not inside Hooks like useReducer() or useMemo().");
        }
      } // This is the first dependency for this component. Create a new list.


      lastContextDependency = contextItem;
      currentlyRenderingFiber.dependencies = {
        expirationTime: NoWork,
        firstContext: contextItem,
        responders: null
      };
    } else {
      // Append a new context item.
      lastContextDependency = lastContextDependency.next = contextItem;
    }
  }

  return isPrimaryRenderer ? context._currentValue : context._currentValue2;
}

// UpdateQueue is a linked list of prioritized updates.
//
// Like fibers, update queues come in pairs: a current queue, which represents
// the visible state of the screen, and a work-in-progress queue, which can be
// mutated and processed asynchronously before it is committed — a form of
// double buffering. If a work-in-progress render is discarded before finishing,
// we create a new work-in-progress by cloning the current queue.
//
// Both queues share a persistent, singly-linked list structure. To schedule an
// update, we append it to the end of both queues. Each queue maintains a
// pointer to first update in the persistent list that hasn't been processed.
// The work-in-progress pointer always has a position equal to or greater than
// the current queue, since we always work on that one. The current queue's
// pointer is only updated during the commit phase, when we swap in the
// work-in-progress.
//
// For example:
//
//   Current pointer:           A - B - C - D - E - F
//   Work-in-progress pointer:              D - E - F
//                                          ^
//                                          The work-in-progress queue has
//                                          processed more updates than current.
//
// The reason we append to both queues is because otherwise we might drop
// updates without ever processing them. For example, if we only add updates to
// the work-in-progress queue, some updates could be lost whenever a work-in
// -progress render restarts by cloning from current. Similarly, if we only add
// updates to the current queue, the updates will be lost whenever an already
// in-progress queue commits and swaps with the current queue. However, by
// adding to both queues, we guarantee that the update will be part of the next
// work-in-progress. (And because the work-in-progress queue becomes the
// current queue once it commits, there's no danger of applying the same
// update twice.)
//
// Prioritization
// --------------
//
// Updates are not sorted by priority, but by insertion; new updates are always
// appended to the end of the list.
//
// The priority is still important, though. When processing the update queue
// during the render phase, only the updates with sufficient priority are
// included in the result. If we skip an update because it has insufficient
// priority, it remains in the queue to be processed later, during a lower
// priority render. Crucially, all updates subsequent to a skipped update also
// remain in the queue *regardless of their priority*. That means high priority
// updates are sometimes processed twice, at two separate priorities. We also
// keep track of a base state, that represents the state before the first
// update in the queue is applied.
//
// For example:
//
//   Given a base state of '', and the following queue of updates
//
//     A1 - B2 - C1 - D2
//
//   where the number indicates the priority, and the update is applied to the
//   previous state by appending a letter, React will process these updates as
//   two separate renders, one per distinct priority level:
//
//   First render, at priority 1:
//     Base state: ''
//     Updates: [A1, C1]
//     Result state: 'AC'
//
//   Second render, at priority 2:
//     Base state: 'A'            <-  The base state does not include C1,
//                                    because B2 was skipped.
//     Updates: [B2, C1, D2]      <-  C1 was rebased on top of B2
//     Result state: 'ABCD'
//
// Because we process updates in insertion order, and rebase high priority
// updates when preceding updates are skipped, the final result is deterministic
// regardless of priority. Intermediate state may vary according to system
// resources, but the final state is always the same.
var UpdateState = 0;
var ReplaceState = 1;
var ForceUpdate = 2;
var CaptureUpdate = 3; // Global state that is reset at the beginning of calling `processUpdateQueue`.
// It should only be read right after calling `processUpdateQueue`, via
// `checkHasForceUpdateAfterProcessing`.

var hasForceUpdate = false;
var didWarnUpdateInsideUpdate;
var currentlyProcessingQueue;


{
  didWarnUpdateInsideUpdate = false;
  currentlyProcessingQueue = null;

  
}

function createUpdateQueue(baseState) {
  var queue = {
    baseState: baseState,
    firstUpdate: null,
    lastUpdate: null,
    firstCapturedUpdate: null,
    lastCapturedUpdate: null,
    firstEffect: null,
    lastEffect: null,
    firstCapturedEffect: null,
    lastCapturedEffect: null
  };
  return queue;
}

function cloneUpdateQueue(currentQueue) {
  var queue = {
    baseState: currentQueue.baseState,
    firstUpdate: currentQueue.firstUpdate,
    lastUpdate: currentQueue.lastUpdate,
    // TODO: With resuming, if we bail out and resuse the child tree, we should
    // keep these effects.
    firstCapturedUpdate: null,
    lastCapturedUpdate: null,
    firstEffect: null,
    lastEffect: null,
    firstCapturedEffect: null,
    lastCapturedEffect: null
  };
  return queue;
}

function createUpdate(expirationTime, suspenseConfig) {
  var update = {
    expirationTime: expirationTime,
    suspenseConfig: suspenseConfig,
    tag: UpdateState,
    payload: null,
    callback: null,
    next: null,
    nextEffect: null
  };

  {
    update.priority = getCurrentPriorityLevel();
  }

  return update;
}

function appendUpdateToQueue(queue, update) {
  // Append the update to the end of the list.
  if (queue.lastUpdate === null) {
    // Queue is empty
    queue.firstUpdate = queue.lastUpdate = update;
  } else {
    queue.lastUpdate.next = update;
    queue.lastUpdate = update;
  }
}

function enqueueUpdate(fiber, update) {
  // Update queues are created lazily.
  var alternate = fiber.alternate;
  var queue1;
  var queue2;

  if (alternate === null) {
    // There's only one fiber.
    queue1 = fiber.updateQueue;
    queue2 = null;

    if (queue1 === null) {
      queue1 = fiber.updateQueue = createUpdateQueue(fiber.memoizedState);
    }
  } else {
    // There are two owners.
    queue1 = fiber.updateQueue;
    queue2 = alternate.updateQueue;

    if (queue1 === null) {
      if (queue2 === null) {
        // Neither fiber has an update queue. Create new ones.
        queue1 = fiber.updateQueue = createUpdateQueue(fiber.memoizedState);
        queue2 = alternate.updateQueue = createUpdateQueue(alternate.memoizedState);
      } else {
        // Only one fiber has an update queue. Clone to create a new one.
        queue1 = fiber.updateQueue = cloneUpdateQueue(queue2);
      }
    } else {
      if (queue2 === null) {
        // Only one fiber has an update queue. Clone to create a new one.
        queue2 = alternate.updateQueue = cloneUpdateQueue(queue1);
      } else {// Both owners have an update queue.
      }
    }
  }

  if (queue2 === null || queue1 === queue2) {
    // There's only a single queue.
    appendUpdateToQueue(queue1, update);
  } else {
    // There are two queues. We need to append the update to both queues,
    // while accounting for the persistent structure of the list — we don't
    // want the same update to be added multiple times.
    if (queue1.lastUpdate === null || queue2.lastUpdate === null) {
      // One of the queues is not empty. We must add the update to both queues.
      appendUpdateToQueue(queue1, update);
      appendUpdateToQueue(queue2, update);
    } else {
      // Both queues are non-empty. The last update is the same in both lists,
      // because of structural sharing. So, only append to one of the lists.
      appendUpdateToQueue(queue1, update); // But we still need to update the `lastUpdate` pointer of queue2.

      queue2.lastUpdate = update;
    }
  }

  {
    if (fiber.tag === ClassComponent && (currentlyProcessingQueue === queue1 || queue2 !== null && currentlyProcessingQueue === queue2) && !didWarnUpdateInsideUpdate) {
      warningWithoutStack$1(false, 'An update (setState, replaceState, or forceUpdate) was scheduled ' + 'from inside an update function. Update functions should be pure, ' + 'with zero side-effects. Consider using componentDidUpdate or a ' + 'callback.');
      didWarnUpdateInsideUpdate = true;
    }
  }
}
function enqueueCapturedUpdate(workInProgress, update) {
  // Captured updates go into a separate list, and only on the work-in-
  // progress queue.
  var workInProgressQueue = workInProgress.updateQueue;

  if (workInProgressQueue === null) {
    workInProgressQueue = workInProgress.updateQueue = createUpdateQueue(workInProgress.memoizedState);
  } else {
    // TODO: I put this here rather than createWorkInProgress so that we don't
    // clone the queue unnecessarily. There's probably a better way to
    // structure this.
    workInProgressQueue = ensureWorkInProgressQueueIsAClone(workInProgress, workInProgressQueue);
  } // Append the update to the end of the list.


  if (workInProgressQueue.lastCapturedUpdate === null) {
    // This is the first render phase update
    workInProgressQueue.firstCapturedUpdate = workInProgressQueue.lastCapturedUpdate = update;
  } else {
    workInProgressQueue.lastCapturedUpdate.next = update;
    workInProgressQueue.lastCapturedUpdate = update;
  }
}

function ensureWorkInProgressQueueIsAClone(workInProgress, queue) {
  var current = workInProgress.alternate;

  if (current !== null) {
    // If the work-in-progress queue is equal to the current queue,
    // we need to clone it first.
    if (queue === current.updateQueue) {
      queue = workInProgress.updateQueue = cloneUpdateQueue(queue);
    }
  }

  return queue;
}

function getStateFromUpdate(workInProgress, queue, update, prevState, nextProps, instance) {
  switch (update.tag) {
    case ReplaceState:
      {
        var payload = update.payload;

        if (typeof payload === 'function') {
          // Updater function
          {
            enterDisallowedContextReadInDEV();

            if (debugRenderPhaseSideEffects || debugRenderPhaseSideEffectsForStrictMode && workInProgress.mode & StrictMode) {
              payload.call(instance, prevState, nextProps);
            }
          }

          var nextState = payload.call(instance, prevState, nextProps);

          {
            exitDisallowedContextReadInDEV();
          }

          return nextState;
        } // State object


        return payload;
      }

    case CaptureUpdate:
      {
        workInProgress.effectTag = workInProgress.effectTag & ~ShouldCapture | DidCapture;
      }
    // Intentional fallthrough

    case UpdateState:
      {
        var _payload = update.payload;
        var partialState;

        if (typeof _payload === 'function') {
          // Updater function
          {
            enterDisallowedContextReadInDEV();

            if (debugRenderPhaseSideEffects || debugRenderPhaseSideEffectsForStrictMode && workInProgress.mode & StrictMode) {
              _payload.call(instance, prevState, nextProps);
            }
          }

          partialState = _payload.call(instance, prevState, nextProps);

          {
            exitDisallowedContextReadInDEV();
          }
        } else {
          // Partial state object
          partialState = _payload;
        }

        if (partialState === null || partialState === undefined) {
          // Null and undefined are treated as no-ops.
          return prevState;
        } // Merge the partial state and the previous state.


        return _assign({}, prevState, partialState);
      }

    case ForceUpdate:
      {
        hasForceUpdate = true;
        return prevState;
      }
  }

  return prevState;
}

function processUpdateQueue(workInProgress, queue, props, instance, renderExpirationTime) {
  hasForceUpdate = false;
  queue = ensureWorkInProgressQueueIsAClone(workInProgress, queue);

  {
    currentlyProcessingQueue = queue;
  } // These values may change as we process the queue.


  var newBaseState = queue.baseState;
  var newFirstUpdate = null;
  var newExpirationTime = NoWork; // Iterate through the list of updates to compute the result.

  var update = queue.firstUpdate;
  var resultState = newBaseState;

  while (update !== null) {
    var updateExpirationTime = update.expirationTime;

    if (updateExpirationTime < renderExpirationTime) {
      // This update does not have sufficient priority. Skip it.
      if (newFirstUpdate === null) {
        // This is the first skipped update. It will be the first update in
        // the new list.
        newFirstUpdate = update; // Since this is the first update that was skipped, the current result
        // is the new base state.

        newBaseState = resultState;
      } // Since this update will remain in the list, update the remaining
      // expiration time.


      if (newExpirationTime < updateExpirationTime) {
        newExpirationTime = updateExpirationTime;
      }
    } else {
      // This update does have sufficient priority.
      // Mark the event time of this update as relevant to this render pass.
      // TODO: This should ideally use the true event time of this update rather than
      // its priority which is a derived and not reverseable value.
      // TODO: We should skip this update if it was already committed but currently
      // we have no way of detecting the difference between a committed and suspended
      // update here.
      markRenderEventTimeAndConfig(updateExpirationTime, update.suspenseConfig); // Process it and compute a new result.

      resultState = getStateFromUpdate(workInProgress, queue, update, resultState, props, instance);
      var callback = update.callback;

      if (callback !== null) {
        workInProgress.effectTag |= Callback; // Set this to null, in case it was mutated during an aborted render.

        update.nextEffect = null;

        if (queue.lastEffect === null) {
          queue.firstEffect = queue.lastEffect = update;
        } else {
          queue.lastEffect.nextEffect = update;
          queue.lastEffect = update;
        }
      }
    } // Continue to the next update.


    update = update.next;
  } // Separately, iterate though the list of captured updates.


  var newFirstCapturedUpdate = null;
  update = queue.firstCapturedUpdate;

  while (update !== null) {
    var _updateExpirationTime = update.expirationTime;

    if (_updateExpirationTime < renderExpirationTime) {
      // This update does not have sufficient priority. Skip it.
      if (newFirstCapturedUpdate === null) {
        // This is the first skipped captured update. It will be the first
        // update in the new list.
        newFirstCapturedUpdate = update; // If this is the first update that was skipped, the current result is
        // the new base state.

        if (newFirstUpdate === null) {
          newBaseState = resultState;
        }
      } // Since this update will remain in the list, update the remaining
      // expiration time.


      if (newExpirationTime < _updateExpirationTime) {
        newExpirationTime = _updateExpirationTime;
      }
    } else {
      // This update does have sufficient priority. Process it and compute
      // a new result.
      resultState = getStateFromUpdate(workInProgress, queue, update, resultState, props, instance);
      var _callback = update.callback;

      if (_callback !== null) {
        workInProgress.effectTag |= Callback; // Set this to null, in case it was mutated during an aborted render.

        update.nextEffect = null;

        if (queue.lastCapturedEffect === null) {
          queue.firstCapturedEffect = queue.lastCapturedEffect = update;
        } else {
          queue.lastCapturedEffect.nextEffect = update;
          queue.lastCapturedEffect = update;
        }
      }
    }

    update = update.next;
  }

  if (newFirstUpdate === null) {
    queue.lastUpdate = null;
  }

  if (newFirstCapturedUpdate === null) {
    queue.lastCapturedUpdate = null;
  } else {
    workInProgress.effectTag |= Callback;
  }

  if (newFirstUpdate === null && newFirstCapturedUpdate === null) {
    // We processed every update, without skipping. That means the new base
    // state is the same as the result state.
    newBaseState = resultState;
  }

  queue.baseState = newBaseState;
  queue.firstUpdate = newFirstUpdate;
  queue.firstCapturedUpdate = newFirstCapturedUpdate; // Set the remaining expiration time to be whatever is remaining in the queue.
  // This should be fine because the only two other things that contribute to
  // expiration time are props and context. We're already in the middle of the
  // begin phase by the time we start processing the queue, so we've already
  // dealt with the props. Context in components that specify
  // shouldComponentUpdate is tricky; but we'll have to account for
  // that regardless.

  markUnprocessedUpdateTime(newExpirationTime);
  workInProgress.expirationTime = newExpirationTime;
  workInProgress.memoizedState = resultState;

  {
    currentlyProcessingQueue = null;
  }
}

function callCallback(callback, context) {
  if (!(typeof callback === 'function')) {
    {
      throw Error("Invalid argument passed as callback. Expected a function. Instead received: " + callback);
    }
  }

  callback.call(context);
}

function resetHasForceUpdateBeforeProcessing() {
  hasForceUpdate = false;
}
function checkHasForceUpdateAfterProcessing() {
  return hasForceUpdate;
}
function commitUpdateQueue(finishedWork, finishedQueue, instance, renderExpirationTime) {
  // If the finished render included captured updates, and there are still
  // lower priority updates left over, we need to keep the captured updates
  // in the queue so that they are rebased and not dropped once we process the
  // queue again at the lower priority.
  if (finishedQueue.firstCapturedUpdate !== null) {
    // Join the captured update list to the end of the normal list.
    if (finishedQueue.lastUpdate !== null) {
      finishedQueue.lastUpdate.next = finishedQueue.firstCapturedUpdate;
      finishedQueue.lastUpdate = finishedQueue.lastCapturedUpdate;
    } // Clear the list of captured updates.


    finishedQueue.firstCapturedUpdate = finishedQueue.lastCapturedUpdate = null;
  } // Commit the effects


  commitUpdateEffects(finishedQueue.firstEffect, instance);
  finishedQueue.firstEffect = finishedQueue.lastEffect = null;
  commitUpdateEffects(finishedQueue.firstCapturedEffect, instance);
  finishedQueue.firstCapturedEffect = finishedQueue.lastCapturedEffect = null;
}

function commitUpdateEffects(effect, instance) {
  while (effect !== null) {
    var callback = effect.callback;

    if (callback !== null) {
      effect.callback = null;
      callCallback(callback, instance);
    }

    effect = effect.nextEffect;
  }
}

var ReactCurrentBatchConfig = ReactSharedInternals.ReactCurrentBatchConfig;
function requestCurrentSuspenseConfig() {
  return ReactCurrentBatchConfig.suspense;
}

var fakeInternalInstance = {};
var isArray$1 = Array.isArray; // React.Component uses a shared frozen object by default.
// We'll use it to determine whether we need to initialize legacy refs.

var emptyRefsObject = new React.Component().refs;
var didWarnAboutStateAssignmentForComponent;
var didWarnAboutUninitializedState;
var didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate;
var didWarnAboutLegacyLifecyclesAndDerivedState;
var didWarnAboutUndefinedDerivedState;
var warnOnUndefinedDerivedState;
var warnOnInvalidCallback$1;
var didWarnAboutDirectlyAssigningPropsToState;
var didWarnAboutContextTypeAndContextTypes;
var didWarnAboutInvalidateContextType;

{
  didWarnAboutStateAssignmentForComponent = new Set();
  didWarnAboutUninitializedState = new Set();
  didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate = new Set();
  didWarnAboutLegacyLifecyclesAndDerivedState = new Set();
  didWarnAboutDirectlyAssigningPropsToState = new Set();
  didWarnAboutUndefinedDerivedState = new Set();
  didWarnAboutContextTypeAndContextTypes = new Set();
  didWarnAboutInvalidateContextType = new Set();
  var didWarnOnInvalidCallback = new Set();

  warnOnInvalidCallback$1 = function (callback, callerName) {
    if (callback === null || typeof callback === 'function') {
      return;
    }

    var key = callerName + "_" + callback;

    if (!didWarnOnInvalidCallback.has(key)) {
      didWarnOnInvalidCallback.add(key);
      warningWithoutStack$1(false, '%s(...): Expected the last optional `callback` argument to be a ' + 'function. Instead received: %s.', callerName, callback);
    }
  };

  warnOnUndefinedDerivedState = function (type, partialState) {
    if (partialState === undefined) {
      var componentName = getComponentName(type) || 'Component';

      if (!didWarnAboutUndefinedDerivedState.has(componentName)) {
        didWarnAboutUndefinedDerivedState.add(componentName);
        warningWithoutStack$1(false, '%s.getDerivedStateFromProps(): A valid state object (or null) must be returned. ' + 'You have returned undefined.', componentName);
      }
    }
  }; // This is so gross but it's at least non-critical and can be removed if
  // it causes problems. This is meant to give a nicer error message for
  // ReactDOM15.unstable_renderSubtreeIntoContainer(reactDOM16Component,
  // ...)) which otherwise throws a "_processChildContext is not a function"
  // exception.


  Object.defineProperty(fakeInternalInstance, '_processChildContext', {
    enumerable: false,
    value: function () {
      {
        {
          throw Error("_processChildContext is not available in React 16+. This likely means you have multiple copies of React and are attempting to nest a React 15 tree inside a React 16 tree using unstable_renderSubtreeIntoContainer, which isn't supported. Try to make sure you have only one copy of React (and ideally, switch to ReactDOM.createPortal).");
        }
      }
    }
  });
  Object.freeze(fakeInternalInstance);
}

function applyDerivedStateFromProps(workInProgress, ctor, getDerivedStateFromProps, nextProps) {
  var prevState = workInProgress.memoizedState;

  {
    if (debugRenderPhaseSideEffects || debugRenderPhaseSideEffectsForStrictMode && workInProgress.mode & StrictMode) {
      // Invoke the function an extra time to help detect side-effects.
      getDerivedStateFromProps(nextProps, prevState);
    }
  }

  var partialState = getDerivedStateFromProps(nextProps, prevState);

  {
    warnOnUndefinedDerivedState(ctor, partialState);
  } // Merge the partial state and the previous state.


  var memoizedState = partialState === null || partialState === undefined ? prevState : _assign({}, prevState, partialState);
  workInProgress.memoizedState = memoizedState; // Once the update queue is empty, persist the derived state onto the
  // base state.

  var updateQueue = workInProgress.updateQueue;

  if (updateQueue !== null && workInProgress.expirationTime === NoWork) {
    updateQueue.baseState = memoizedState;
  }
}
var classComponentUpdater = {
  isMounted: isMounted,
  enqueueSetState: function (inst, payload, callback) {
    var fiber = get(inst);
    var currentTime = requestCurrentTimeForUpdate();
    var suspenseConfig = requestCurrentSuspenseConfig();
    var expirationTime = computeExpirationForFiber(currentTime, fiber, suspenseConfig);
    var update = createUpdate(expirationTime, suspenseConfig);
    update.payload = payload;

    if (callback !== undefined && callback !== null) {
      {
        warnOnInvalidCallback$1(callback, 'setState');
      }

      update.callback = callback;
    }

    enqueueUpdate(fiber, update);
    scheduleWork(fiber, expirationTime);
  },
  enqueueReplaceState: function (inst, payload, callback) {
    var fiber = get(inst);
    var currentTime = requestCurrentTimeForUpdate();
    var suspenseConfig = requestCurrentSuspenseConfig();
    var expirationTime = computeExpirationForFiber(currentTime, fiber, suspenseConfig);
    var update = createUpdate(expirationTime, suspenseConfig);
    update.tag = ReplaceState;
    update.payload = payload;

    if (callback !== undefined && callback !== null) {
      {
        warnOnInvalidCallback$1(callback, 'replaceState');
      }

      update.callback = callback;
    }

    enqueueUpdate(fiber, update);
    scheduleWork(fiber, expirationTime);
  },
  enqueueForceUpdate: function (inst, callback) {
    var fiber = get(inst);
    var currentTime = requestCurrentTimeForUpdate();
    var suspenseConfig = requestCurrentSuspenseConfig();
    var expirationTime = computeExpirationForFiber(currentTime, fiber, suspenseConfig);
    var update = createUpdate(expirationTime, suspenseConfig);
    update.tag = ForceUpdate;

    if (callback !== undefined && callback !== null) {
      {
        warnOnInvalidCallback$1(callback, 'forceUpdate');
      }

      update.callback = callback;
    }

    enqueueUpdate(fiber, update);
    scheduleWork(fiber, expirationTime);
  }
};

function checkShouldComponentUpdate(workInProgress, ctor, oldProps, newProps, oldState, newState, nextContext) {
  var instance = workInProgress.stateNode;

  if (typeof instance.shouldComponentUpdate === 'function') {
    startPhaseTimer(workInProgress, 'shouldComponentUpdate');
    var shouldUpdate = instance.shouldComponentUpdate(newProps, newState, nextContext);
    stopPhaseTimer();

    {
      !(shouldUpdate !== undefined) ? warningWithoutStack$1(false, '%s.shouldComponentUpdate(): Returned undefined instead of a ' + 'boolean value. Make sure to return true or false.', getComponentName(ctor) || 'Component') : void 0;
    }

    return shouldUpdate;
  }

  if (ctor.prototype && ctor.prototype.isPureReactComponent) {
    return !shallowEqual(oldProps, newProps) || !shallowEqual(oldState, newState);
  }

  return true;
}

function checkClassInstance(workInProgress, ctor, newProps) {
  var instance = workInProgress.stateNode;

  {
    var name = getComponentName(ctor) || 'Component';
    var renderPresent = instance.render;

    if (!renderPresent) {
      if (ctor.prototype && typeof ctor.prototype.render === 'function') {
        warningWithoutStack$1(false, '%s(...): No `render` method found on the returned component ' + 'instance: did you accidentally return an object from the constructor?', name);
      } else {
        warningWithoutStack$1(false, '%s(...): No `render` method found on the returned component ' + 'instance: you may have forgotten to define `render`.', name);
      }
    }

    var noGetInitialStateOnES6 = !instance.getInitialState || instance.getInitialState.isReactClassApproved || instance.state;
    !noGetInitialStateOnES6 ? warningWithoutStack$1(false, 'getInitialState was defined on %s, a plain JavaScript class. ' + 'This is only supported for classes created using React.createClass. ' + 'Did you mean to define a state property instead?', name) : void 0;
    var noGetDefaultPropsOnES6 = !instance.getDefaultProps || instance.getDefaultProps.isReactClassApproved;
    !noGetDefaultPropsOnES6 ? warningWithoutStack$1(false, 'getDefaultProps was defined on %s, a plain JavaScript class. ' + 'This is only supported for classes created using React.createClass. ' + 'Use a static property to define defaultProps instead.', name) : void 0;
    var noInstancePropTypes = !instance.propTypes;
    !noInstancePropTypes ? warningWithoutStack$1(false, 'propTypes was defined as an instance property on %s. Use a static ' + 'property to define propTypes instead.', name) : void 0;
    var noInstanceContextType = !instance.contextType;
    !noInstanceContextType ? warningWithoutStack$1(false, 'contextType was defined as an instance property on %s. Use a static ' + 'property to define contextType instead.', name) : void 0;

    if (disableLegacyContext) {
      if (ctor.childContextTypes) {
        warningWithoutStack$1(false, '%s uses the legacy childContextTypes API which is no longer supported. ' + 'Use React.createContext() instead.', name);
      }

      if (ctor.contextTypes) {
        warningWithoutStack$1(false, '%s uses the legacy contextTypes API which is no longer supported. ' + 'Use React.createContext() with static contextType instead.', name);
      }
    } else {
      var noInstanceContextTypes = !instance.contextTypes;
      !noInstanceContextTypes ? warningWithoutStack$1(false, 'contextTypes was defined as an instance property on %s. Use a static ' + 'property to define contextTypes instead.', name) : void 0;

      if (ctor.contextType && ctor.contextTypes && !didWarnAboutContextTypeAndContextTypes.has(ctor)) {
        didWarnAboutContextTypeAndContextTypes.add(ctor);
        warningWithoutStack$1(false, '%s declares both contextTypes and contextType static properties. ' + 'The legacy contextTypes property will be ignored.', name);
      }
    }

    var noComponentShouldUpdate = typeof instance.componentShouldUpdate !== 'function';
    !noComponentShouldUpdate ? warningWithoutStack$1(false, '%s has a method called ' + 'componentShouldUpdate(). Did you mean shouldComponentUpdate()? ' + 'The name is phrased as a question because the function is ' + 'expected to return a value.', name) : void 0;

    if (ctor.prototype && ctor.prototype.isPureReactComponent && typeof instance.shouldComponentUpdate !== 'undefined') {
      warningWithoutStack$1(false, '%s has a method called shouldComponentUpdate(). ' + 'shouldComponentUpdate should not be used when extending React.PureComponent. ' + 'Please extend React.Component if shouldComponentUpdate is used.', getComponentName(ctor) || 'A pure component');
    }

    var noComponentDidUnmount = typeof instance.componentDidUnmount !== 'function';
    !noComponentDidUnmount ? warningWithoutStack$1(false, '%s has a method called ' + 'componentDidUnmount(). But there is no such lifecycle method. ' + 'Did you mean componentWillUnmount()?', name) : void 0;
    var noComponentDidReceiveProps = typeof instance.componentDidReceiveProps !== 'function';
    !noComponentDidReceiveProps ? warningWithoutStack$1(false, '%s has a method called ' + 'componentDidReceiveProps(). But there is no such lifecycle method. ' + 'If you meant to update the state in response to changing props, ' + 'use componentWillReceiveProps(). If you meant to fetch data or ' + 'run side-effects or mutations after React has updated the UI, use componentDidUpdate().', name) : void 0;
    var noComponentWillRecieveProps = typeof instance.componentWillRecieveProps !== 'function';
    !noComponentWillRecieveProps ? warningWithoutStack$1(false, '%s has a method called ' + 'componentWillRecieveProps(). Did you mean componentWillReceiveProps()?', name) : void 0;
    var noUnsafeComponentWillRecieveProps = typeof instance.UNSAFE_componentWillRecieveProps !== 'function';
    !noUnsafeComponentWillRecieveProps ? warningWithoutStack$1(false, '%s has a method called ' + 'UNSAFE_componentWillRecieveProps(). Did you mean UNSAFE_componentWillReceiveProps()?', name) : void 0;
    var hasMutatedProps = instance.props !== newProps;
    !(instance.props === undefined || !hasMutatedProps) ? warningWithoutStack$1(false, '%s(...): When calling super() in `%s`, make sure to pass ' + "up the same props that your component's constructor was passed.", name, name) : void 0;
    var noInstanceDefaultProps = !instance.defaultProps;
    !noInstanceDefaultProps ? warningWithoutStack$1(false, 'Setting defaultProps as an instance property on %s is not supported and will be ignored.' + ' Instead, define defaultProps as a static property on %s.', name, name) : void 0;

    if (typeof instance.getSnapshotBeforeUpdate === 'function' && typeof instance.componentDidUpdate !== 'function' && !didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate.has(ctor)) {
      didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate.add(ctor);
      warningWithoutStack$1(false, '%s: getSnapshotBeforeUpdate() should be used with componentDidUpdate(). ' + 'This component defines getSnapshotBeforeUpdate() only.', getComponentName(ctor));
    }

    var noInstanceGetDerivedStateFromProps = typeof instance.getDerivedStateFromProps !== 'function';
    !noInstanceGetDerivedStateFromProps ? warningWithoutStack$1(false, '%s: getDerivedStateFromProps() is defined as an instance method ' + 'and will be ignored. Instead, declare it as a static method.', name) : void 0;
    var noInstanceGetDerivedStateFromCatch = typeof instance.getDerivedStateFromError !== 'function';
    !noInstanceGetDerivedStateFromCatch ? warningWithoutStack$1(false, '%s: getDerivedStateFromError() is defined as an instance method ' + 'and will be ignored. Instead, declare it as a static method.', name) : void 0;
    var noStaticGetSnapshotBeforeUpdate = typeof ctor.getSnapshotBeforeUpdate !== 'function';
    !noStaticGetSnapshotBeforeUpdate ? warningWithoutStack$1(false, '%s: getSnapshotBeforeUpdate() is defined as a static method ' + 'and will be ignored. Instead, declare it as an instance method.', name) : void 0;
    var _state = instance.state;

    if (_state && (typeof _state !== 'object' || isArray$1(_state))) {
      warningWithoutStack$1(false, '%s.state: must be set to an object or null', name);
    }

    if (typeof instance.getChildContext === 'function') {
      !(typeof ctor.childContextTypes === 'object') ? warningWithoutStack$1(false, '%s.getChildContext(): childContextTypes must be defined in order to ' + 'use getChildContext().', name) : void 0;
    }
  }
}

function adoptClassInstance(workInProgress, instance) {
  instance.updater = classComponentUpdater;
  workInProgress.stateNode = instance; // The instance needs access to the fiber so that it can schedule updates

  set(instance, workInProgress);

  {
    instance._reactInternalInstance = fakeInternalInstance;
  }
}

function constructClassInstance(workInProgress, ctor, props, renderExpirationTime) {
  var isLegacyContextConsumer = false;
  var unmaskedContext = emptyContextObject;
  var context = emptyContextObject;
  var contextType = ctor.contextType;

  {
    if ('contextType' in ctor) {
      var isValid = // Allow null for conditional declaration
      contextType === null || contextType !== undefined && contextType.$$typeof === REACT_CONTEXT_TYPE && contextType._context === undefined; // Not a <Context.Consumer>

      if (!isValid && !didWarnAboutInvalidateContextType.has(ctor)) {
        didWarnAboutInvalidateContextType.add(ctor);
        var addendum = '';

        if (contextType === undefined) {
          addendum = ' However, it is set to undefined. ' + 'This can be caused by a typo or by mixing up named and default imports. ' + 'This can also happen due to a circular dependency, so ' + 'try moving the createContext() call to a separate file.';
        } else if (typeof contextType !== 'object') {
          addendum = ' However, it is set to a ' + typeof contextType + '.';
        } else if (contextType.$$typeof === REACT_PROVIDER_TYPE) {
          addendum = ' Did you accidentally pass the Context.Provider instead?';
        } else if (contextType._context !== undefined) {
          // <Context.Consumer>
          addendum = ' Did you accidentally pass the Context.Consumer instead?';
        } else {
          addendum = ' However, it is set to an object with keys {' + Object.keys(contextType).join(', ') + '}.';
        }

        warningWithoutStack$1(false, '%s defines an invalid contextType. ' + 'contextType should point to the Context object returned by React.createContext().%s', getComponentName(ctor) || 'Component', addendum);
      }
    }
  }

  if (typeof contextType === 'object' && contextType !== null) {
    context = readContext(contextType);
  } else if (!disableLegacyContext) {
    unmaskedContext = getUnmaskedContext(workInProgress, ctor, true);
    var contextTypes = ctor.contextTypes;
    isLegacyContextConsumer = contextTypes !== null && contextTypes !== undefined;
    context = isLegacyContextConsumer ? getMaskedContext(workInProgress, unmaskedContext) : emptyContextObject;
  } // Instantiate twice to help detect side-effects.


  {
    if (debugRenderPhaseSideEffects || debugRenderPhaseSideEffectsForStrictMode && workInProgress.mode & StrictMode) {
      new ctor(props, context); // eslint-disable-line no-new
    }
  }

  var instance = new ctor(props, context);
  var state = workInProgress.memoizedState = instance.state !== null && instance.state !== undefined ? instance.state : null;
  adoptClassInstance(workInProgress, instance);

  {
    if (typeof ctor.getDerivedStateFromProps === 'function' && state === null) {
      var componentName = getComponentName(ctor) || 'Component';

      if (!didWarnAboutUninitializedState.has(componentName)) {
        didWarnAboutUninitializedState.add(componentName);
        warningWithoutStack$1(false, '`%s` uses `getDerivedStateFromProps` but its initial state is ' + '%s. This is not recommended. Instead, define the initial state by ' + 'assigning an object to `this.state` in the constructor of `%s`. ' + 'This ensures that `getDerivedStateFromProps` arguments have a consistent shape.', componentName, instance.state === null ? 'null' : 'undefined', componentName);
      }
    } // If new component APIs are defined, "unsafe" lifecycles won't be called.
    // Warn about these lifecycles if they are present.
    // Don't warn about react-lifecycles-compat polyfilled methods though.


    if (typeof ctor.getDerivedStateFromProps === 'function' || typeof instance.getSnapshotBeforeUpdate === 'function') {
      var foundWillMountName = null;
      var foundWillReceivePropsName = null;
      var foundWillUpdateName = null;

      if (typeof instance.componentWillMount === 'function' && instance.componentWillMount.__suppressDeprecationWarning !== true) {
        foundWillMountName = 'componentWillMount';
      } else if (typeof instance.UNSAFE_componentWillMount === 'function') {
        foundWillMountName = 'UNSAFE_componentWillMount';
      }

      if (typeof instance.componentWillReceiveProps === 'function' && instance.componentWillReceiveProps.__suppressDeprecationWarning !== true) {
        foundWillReceivePropsName = 'componentWillReceiveProps';
      } else if (typeof instance.UNSAFE_componentWillReceiveProps === 'function') {
        foundWillReceivePropsName = 'UNSAFE_componentWillReceiveProps';
      }

      if (typeof instance.componentWillUpdate === 'function' && instance.componentWillUpdate.__suppressDeprecationWarning !== true) {
        foundWillUpdateName = 'componentWillUpdate';
      } else if (typeof instance.UNSAFE_componentWillUpdate === 'function') {
        foundWillUpdateName = 'UNSAFE_componentWillUpdate';
      }

      if (foundWillMountName !== null || foundWillReceivePropsName !== null || foundWillUpdateName !== null) {
        var _componentName = getComponentName(ctor) || 'Component';

        var newApiName = typeof ctor.getDerivedStateFromProps === 'function' ? 'getDerivedStateFromProps()' : 'getSnapshotBeforeUpdate()';

        if (!didWarnAboutLegacyLifecyclesAndDerivedState.has(_componentName)) {
          didWarnAboutLegacyLifecyclesAndDerivedState.add(_componentName);
          warningWithoutStack$1(false, 'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' + '%s uses %s but also contains the following legacy lifecycles:%s%s%s\n\n' + 'The above lifecycles should be removed. Learn more about this warning here:\n' + 'https://fb.me/react-unsafe-component-lifecycles', _componentName, newApiName, foundWillMountName !== null ? "\n  " + foundWillMountName : '', foundWillReceivePropsName !== null ? "\n  " + foundWillReceivePropsName : '', foundWillUpdateName !== null ? "\n  " + foundWillUpdateName : '');
        }
      }
    }
  } // Cache unmasked context so we can avoid recreating masked context unless necessary.
  // ReactFiberContext usually updates this cache but can't for newly-created instances.


  if (isLegacyContextConsumer) {
    cacheContext(workInProgress, unmaskedContext, context);
  }

  return instance;
}

function callComponentWillMount(workInProgress, instance) {
  startPhaseTimer(workInProgress, 'componentWillMount');
  var oldState = instance.state;

  if (typeof instance.componentWillMount === 'function') {
    instance.componentWillMount();
  }

  if (typeof instance.UNSAFE_componentWillMount === 'function') {
    instance.UNSAFE_componentWillMount();
  }

  stopPhaseTimer();

  if (oldState !== instance.state) {
    {
      warningWithoutStack$1(false, '%s.componentWillMount(): Assigning directly to this.state is ' + "deprecated (except inside a component's " + 'constructor). Use setState instead.', getComponentName(workInProgress.type) || 'Component');
    }

    classComponentUpdater.enqueueReplaceState(instance, instance.state, null);
  }
}

function callComponentWillReceiveProps(workInProgress, instance, newProps, nextContext) {
  var oldState = instance.state;
  startPhaseTimer(workInProgress, 'componentWillReceiveProps');

  if (typeof instance.componentWillReceiveProps === 'function') {
    instance.componentWillReceiveProps(newProps, nextContext);
  }

  if (typeof instance.UNSAFE_componentWillReceiveProps === 'function') {
    instance.UNSAFE_componentWillReceiveProps(newProps, nextContext);
  }

  stopPhaseTimer();

  if (instance.state !== oldState) {
    {
      var componentName = getComponentName(workInProgress.type) || 'Component';

      if (!didWarnAboutStateAssignmentForComponent.has(componentName)) {
        didWarnAboutStateAssignmentForComponent.add(componentName);
        warningWithoutStack$1(false, '%s.componentWillReceiveProps(): Assigning directly to ' + "this.state is deprecated (except inside a component's " + 'constructor). Use setState instead.', componentName);
      }
    }

    classComponentUpdater.enqueueReplaceState(instance, instance.state, null);
  }
} // Invokes the mount life-cycles on a previously never rendered instance.


function mountClassInstance(workInProgress, ctor, newProps, renderExpirationTime) {
  {
    checkClassInstance(workInProgress, ctor, newProps);
  }

  var instance = workInProgress.stateNode;
  instance.props = newProps;
  instance.state = workInProgress.memoizedState;
  instance.refs = emptyRefsObject;
  var contextType = ctor.contextType;

  if (typeof contextType === 'object' && contextType !== null) {
    instance.context = readContext(contextType);
  } else if (disableLegacyContext) {
    instance.context = emptyContextObject;
  } else {
    var unmaskedContext = getUnmaskedContext(workInProgress, ctor, true);
    instance.context = getMaskedContext(workInProgress, unmaskedContext);
  }

  {
    if (instance.state === newProps) {
      var componentName = getComponentName(ctor) || 'Component';

      if (!didWarnAboutDirectlyAssigningPropsToState.has(componentName)) {
        didWarnAboutDirectlyAssigningPropsToState.add(componentName);
        warningWithoutStack$1(false, '%s: It is not recommended to assign props directly to state ' + "because updates to props won't be reflected in state. " + 'In most cases, it is better to use props directly.', componentName);
      }
    }

    if (workInProgress.mode & StrictMode) {
      ReactStrictModeWarnings.recordLegacyContextWarning(workInProgress, instance);
    }

    if (warnAboutDeprecatedLifecycles) {
      ReactStrictModeWarnings.recordUnsafeLifecycleWarnings(workInProgress, instance);
    }
  }

  var updateQueue = workInProgress.updateQueue;

  if (updateQueue !== null) {
    processUpdateQueue(workInProgress, updateQueue, newProps, instance, renderExpirationTime);
    instance.state = workInProgress.memoizedState;
  }

  var getDerivedStateFromProps = ctor.getDerivedStateFromProps;

  if (typeof getDerivedStateFromProps === 'function') {
    applyDerivedStateFromProps(workInProgress, ctor, getDerivedStateFromProps, newProps);
    instance.state = workInProgress.memoizedState;
  } // In order to support react-lifecycles-compat polyfilled components,
  // Unsafe lifecycles should not be invoked for components using the new APIs.


  if (typeof ctor.getDerivedStateFromProps !== 'function' && typeof instance.getSnapshotBeforeUpdate !== 'function' && (typeof instance.UNSAFE_componentWillMount === 'function' || typeof instance.componentWillMount === 'function')) {
    callComponentWillMount(workInProgress, instance); // If we had additional state updates during this life-cycle, let's
    // process them now.

    updateQueue = workInProgress.updateQueue;

    if (updateQueue !== null) {
      processUpdateQueue(workInProgress, updateQueue, newProps, instance, renderExpirationTime);
      instance.state = workInProgress.memoizedState;
    }
  }

  if (typeof instance.componentDidMount === 'function') {
    workInProgress.effectTag |= Update;
  }
}

function resumeMountClassInstance(workInProgress, ctor, newProps, renderExpirationTime) {
  var instance = workInProgress.stateNode;
  var oldProps = workInProgress.memoizedProps;
  instance.props = oldProps;
  var oldContext = instance.context;
  var contextType = ctor.contextType;
  var nextContext = emptyContextObject;

  if (typeof contextType === 'object' && contextType !== null) {
    nextContext = readContext(contextType);
  } else if (!disableLegacyContext) {
    var nextLegacyUnmaskedContext = getUnmaskedContext(workInProgress, ctor, true);
    nextContext = getMaskedContext(workInProgress, nextLegacyUnmaskedContext);
  }

  var getDerivedStateFromProps = ctor.getDerivedStateFromProps;
  var hasNewLifecycles = typeof getDerivedStateFromProps === 'function' || typeof instance.getSnapshotBeforeUpdate === 'function'; // Note: During these life-cycles, instance.props/instance.state are what
  // ever the previously attempted to render - not the "current". However,
  // during componentDidUpdate we pass the "current" props.
  // In order to support react-lifecycles-compat polyfilled components,
  // Unsafe lifecycles should not be invoked for components using the new APIs.

  if (!hasNewLifecycles && (typeof instance.UNSAFE_componentWillReceiveProps === 'function' || typeof instance.componentWillReceiveProps === 'function')) {
    if (oldProps !== newProps || oldContext !== nextContext) {
      callComponentWillReceiveProps(workInProgress, instance, newProps, nextContext);
    }
  }

  resetHasForceUpdateBeforeProcessing();
  var oldState = workInProgress.memoizedState;
  var newState = instance.state = oldState;
  var updateQueue = workInProgress.updateQueue;

  if (updateQueue !== null) {
    processUpdateQueue(workInProgress, updateQueue, newProps, instance, renderExpirationTime);
    newState = workInProgress.memoizedState;
  }

  if (oldProps === newProps && oldState === newState && !hasContextChanged() && !checkHasForceUpdateAfterProcessing()) {
    // If an update was already in progress, we should schedule an Update
    // effect even though we're bailing out, so that cWU/cDU are called.
    if (typeof instance.componentDidMount === 'function') {
      workInProgress.effectTag |= Update;
    }

    return false;
  }

  if (typeof getDerivedStateFromProps === 'function') {
    applyDerivedStateFromProps(workInProgress, ctor, getDerivedStateFromProps, newProps);
    newState = workInProgress.memoizedState;
  }

  var shouldUpdate = checkHasForceUpdateAfterProcessing() || checkShouldComponentUpdate(workInProgress, ctor, oldProps, newProps, oldState, newState, nextContext);

  if (shouldUpdate) {
    // In order to support react-lifecycles-compat polyfilled components,
    // Unsafe lifecycles should not be invoked for components using the new APIs.
    if (!hasNewLifecycles && (typeof instance.UNSAFE_componentWillMount === 'function' || typeof instance.componentWillMount === 'function')) {
      startPhaseTimer(workInProgress, 'componentWillMount');

      if (typeof instance.componentWillMount === 'function') {
        instance.componentWillMount();
      }

      if (typeof instance.UNSAFE_componentWillMount === 'function') {
        instance.UNSAFE_componentWillMount();
      }

      stopPhaseTimer();
    }

    if (typeof instance.componentDidMount === 'function') {
      workInProgress.effectTag |= Update;
    }
  } else {
    // If an update was already in progress, we should schedule an Update
    // effect even though we're bailing out, so that cWU/cDU are called.
    if (typeof instance.componentDidMount === 'function') {
      workInProgress.effectTag |= Update;
    } // If shouldComponentUpdate returned false, we should still update the
    // memoized state to indicate that this work can be reused.


    workInProgress.memoizedProps = newProps;
    workInProgress.memoizedState = newState;
  } // Update the existing instance's state, props, and context pointers even
  // if shouldComponentUpdate returns false.


  instance.props = newProps;
  instance.state = newState;
  instance.context = nextContext;
  return shouldUpdate;
} // Invokes the update life-cycles and returns false if it shouldn't rerender.


function updateClassInstance(current, workInProgress, ctor, newProps, renderExpirationTime) {
  var instance = workInProgress.stateNode;
  var oldProps = workInProgress.memoizedProps;
  instance.props = workInProgress.type === workInProgress.elementType ? oldProps : resolveDefaultProps(workInProgress.type, oldProps);
  var oldContext = instance.context;
  var contextType = ctor.contextType;
  var nextContext = emptyContextObject;

  if (typeof contextType === 'object' && contextType !== null) {
    nextContext = readContext(contextType);
  } else if (!disableLegacyContext) {
    var nextUnmaskedContext = getUnmaskedContext(workInProgress, ctor, true);
    nextContext = getMaskedContext(workInProgress, nextUnmaskedContext);
  }

  var getDerivedStateFromProps = ctor.getDerivedStateFromProps;
  var hasNewLifecycles = typeof getDerivedStateFromProps === 'function' || typeof instance.getSnapshotBeforeUpdate === 'function'; // Note: During these life-cycles, instance.props/instance.state are what
  // ever the previously attempted to render - not the "current". However,
  // during componentDidUpdate we pass the "current" props.
  // In order to support react-lifecycles-compat polyfilled components,
  // Unsafe lifecycles should not be invoked for components using the new APIs.

  if (!hasNewLifecycles && (typeof instance.UNSAFE_componentWillReceiveProps === 'function' || typeof instance.componentWillReceiveProps === 'function')) {
    if (oldProps !== newProps || oldContext !== nextContext) {
      callComponentWillReceiveProps(workInProgress, instance, newProps, nextContext);
    }
  }

  resetHasForceUpdateBeforeProcessing();
  var oldState = workInProgress.memoizedState;
  var newState = instance.state = oldState;
  var updateQueue = workInProgress.updateQueue;

  if (updateQueue !== null) {
    processUpdateQueue(workInProgress, updateQueue, newProps, instance, renderExpirationTime);
    newState = workInProgress.memoizedState;
  }

  if (oldProps === newProps && oldState === newState && !hasContextChanged() && !checkHasForceUpdateAfterProcessing()) {
    // If an update was already in progress, we should schedule an Update
    // effect even though we're bailing out, so that cWU/cDU are called.
    if (typeof instance.componentDidUpdate === 'function') {
      if (oldProps !== current.memoizedProps || oldState !== current.memoizedState) {
        workInProgress.effectTag |= Update;
      }
    }

    if (typeof instance.getSnapshotBeforeUpdate === 'function') {
      if (oldProps !== current.memoizedProps || oldState !== current.memoizedState) {
        workInProgress.effectTag |= Snapshot;
      }
    }

    return false;
  }

  if (typeof getDerivedStateFromProps === 'function') {
    applyDerivedStateFromProps(workInProgress, ctor, getDerivedStateFromProps, newProps);
    newState = workInProgress.memoizedState;
  }

  var shouldUpdate = checkHasForceUpdateAfterProcessing() || checkShouldComponentUpdate(workInProgress, ctor, oldProps, newProps, oldState, newState, nextContext);

  if (shouldUpdate) {
    // In order to support react-lifecycles-compat polyfilled components,
    // Unsafe lifecycles should not be invoked for components using the new APIs.
    if (!hasNewLifecycles && (typeof instance.UNSAFE_componentWillUpdate === 'function' || typeof instance.componentWillUpdate === 'function')) {
      startPhaseTimer(workInProgress, 'componentWillUpdate');

      if (typeof instance.componentWillUpdate === 'function') {
        instance.componentWillUpdate(newProps, newState, nextContext);
      }

      if (typeof instance.UNSAFE_componentWillUpdate === 'function') {
        instance.UNSAFE_componentWillUpdate(newProps, newState, nextContext);
      }

      stopPhaseTimer();
    }

    if (typeof instance.componentDidUpdate === 'function') {
      workInProgress.effectTag |= Update;
    }

    if (typeof instance.getSnapshotBeforeUpdate === 'function') {
      workInProgress.effectTag |= Snapshot;
    }
  } else {
    // If an update was already in progress, we should schedule an Update
    // effect even though we're bailing out, so that cWU/cDU are called.
    if (typeof instance.componentDidUpdate === 'function') {
      if (oldProps !== current.memoizedProps || oldState !== current.memoizedState) {
        workInProgress.effectTag |= Update;
      }
    }

    if (typeof instance.getSnapshotBeforeUpdate === 'function') {
      if (oldProps !== current.memoizedProps || oldState !== current.memoizedState) {
        workInProgress.effectTag |= Snapshot;
      }
    } // If shouldComponentUpdate returned false, we should still update the
    // memoized props/state to indicate that this work can be reused.


    workInProgress.memoizedProps = newProps;
    workInProgress.memoizedState = newState;
  } // Update the existing instance's state, props, and context pointers even
  // if shouldComponentUpdate returns false.


  instance.props = newProps;
  instance.state = newState;
  instance.context = nextContext;
  return shouldUpdate;
}

var didWarnAboutMaps;
var didWarnAboutGenerators;
var didWarnAboutStringRefs;
var ownerHasKeyUseWarning;
var ownerHasFunctionTypeWarning;

var warnForMissingKey = function (child) {};

{
  didWarnAboutMaps = false;
  didWarnAboutGenerators = false;
  didWarnAboutStringRefs = {};
  /**
   * Warn if there's no key explicitly set on dynamic arrays of children or
   * object keys are not valid. This allows us to keep track of children between
   * updates.
   */

  ownerHasKeyUseWarning = {};
  ownerHasFunctionTypeWarning = {};

  warnForMissingKey = function (child) {
    if (child === null || typeof child !== 'object') {
      return;
    }

    if (!child._store || child._store.validated || child.key != null) {
      return;
    }

    if (!(typeof child._store === 'object')) {
      {
        throw Error("React Component in warnForMissingKey should have a _store. This error is likely caused by a bug in React. Please file an issue.");
      }
    }

    child._store.validated = true;
    var currentComponentErrorInfo = 'Each child in a list should have a unique ' + '"key" prop. See https://fb.me/react-warning-keys for ' + 'more information.' + getCurrentFiberStackInDev();

    if (ownerHasKeyUseWarning[currentComponentErrorInfo]) {
      return;
    }

    ownerHasKeyUseWarning[currentComponentErrorInfo] = true;
    warning$1(false, 'Each child in a list should have a unique ' + '"key" prop. See https://fb.me/react-warning-keys for ' + 'more information.');
  };
}

var isArray = Array.isArray;

function coerceRef(returnFiber, current$$1, element) {
  var mixedRef = element.ref;

  if (mixedRef !== null && typeof mixedRef !== 'function' && typeof mixedRef !== 'object') {
    {
      // TODO: Clean this up once we turn on the string ref warning for
      // everyone, because the strict mode case will no longer be relevant
      if (returnFiber.mode & StrictMode || warnAboutStringRefs) {
        var componentName = getComponentName(returnFiber.type) || 'Component';

        if (!didWarnAboutStringRefs[componentName]) {
          if (warnAboutStringRefs) {
            warningWithoutStack$1(false, 'Component "%s" contains the string ref "%s". Support for string refs ' + 'will be removed in a future major release. We recommend using ' + 'useRef() or createRef() instead. ' + 'Learn more about using refs safely here: ' + 'https://fb.me/react-strict-mode-string-ref%s', componentName, mixedRef, getStackByFiberInDevAndProd(returnFiber));
          } else {
            warningWithoutStack$1(false, 'A string ref, "%s", has been found within a strict mode tree. ' + 'String refs are a source of potential bugs and should be avoided. ' + 'We recommend using useRef() or createRef() instead. ' + 'Learn more about using refs safely here: ' + 'https://fb.me/react-strict-mode-string-ref%s', mixedRef, getStackByFiberInDevAndProd(returnFiber));
          }

          didWarnAboutStringRefs[componentName] = true;
        }
      }
    }

    if (element._owner) {
      var owner = element._owner;
      var inst;

      if (owner) {
        var ownerFiber = owner;

        if (!(ownerFiber.tag === ClassComponent)) {
          {
            throw Error("Function components cannot have refs. Did you mean to use React.forwardRef()?");
          }
        }

        inst = ownerFiber.stateNode;
      }

      if (!inst) {
        {
          throw Error("Missing owner for string ref " + mixedRef + ". This error is likely caused by a bug in React. Please file an issue.");
        }
      }

      var stringRef = '' + mixedRef; // Check if previous string ref matches new string ref

      if (current$$1 !== null && current$$1.ref !== null && typeof current$$1.ref === 'function' && current$$1.ref._stringRef === stringRef) {
        return current$$1.ref;
      }

      var ref = function (value) {
        var refs = inst.refs;

        if (refs === emptyRefsObject) {
          // This is a lazy pooled frozen object, so we need to initialize.
          refs = inst.refs = {};
        }

        if (value === null) {
          delete refs[stringRef];
        } else {
          refs[stringRef] = value;
        }
      };

      ref._stringRef = stringRef;
      return ref;
    } else {
      if (!(typeof mixedRef === 'string')) {
        {
          throw Error("Expected ref to be a function, a string, an object returned by React.createRef(), or null.");
        }
      }

      if (!element._owner) {
        {
          throw Error("Element ref was specified as a string (" + mixedRef + ") but no owner was set. This could happen for one of the following reasons:\n1. You may be adding a ref to a function component\n2. You may be adding a ref to a component that was not created inside a component's render method\n3. You have multiple copies of React loaded\nSee https://fb.me/react-refs-must-have-owner for more information.");
        }
      }
    }
  }

  return mixedRef;
}

function throwOnInvalidObjectType(returnFiber, newChild) {
  if (returnFiber.type !== 'textarea') {
    var addendum = '';

    {
      addendum = ' If you meant to render a collection of children, use an array ' + 'instead.' + getCurrentFiberStackInDev();
    }

    {
      {
        throw Error("Objects are not valid as a React child (found: " + (Object.prototype.toString.call(newChild) === '[object Object]' ? 'object with keys {' + Object.keys(newChild).join(', ') + '}' : newChild) + ")." + addendum);
      }
    }
  }
}

function warnOnFunctionType() {
  var currentComponentErrorInfo = 'Functions are not valid as a React child. This may happen if ' + 'you return a Component instead of <Component /> from render. ' + 'Or maybe you meant to call this function rather than return it.' + getCurrentFiberStackInDev();

  if (ownerHasFunctionTypeWarning[currentComponentErrorInfo]) {
    return;
  }

  ownerHasFunctionTypeWarning[currentComponentErrorInfo] = true;
  warning$1(false, 'Functions are not valid as a React child. This may happen if ' + 'you return a Component instead of <Component /> from render. ' + 'Or maybe you meant to call this function rather than return it.');
} // This wrapper function exists because I expect to clone the code in each path
// to be able to optimize each path individually by branching early. This needs
// a compiler or we can do it manually. Helpers that don't need this branching
// live outside of this function.


function ChildReconciler(shouldTrackSideEffects) {
  function deleteChild(returnFiber, childToDelete) {
    if (!shouldTrackSideEffects) {
      // Noop.
      return;
    } // Deletions are added in reversed order so we add it to the front.
    // At this point, the return fiber's effect list is empty except for
    // deletions, so we can just append the deletion to the list. The remaining
    // effects aren't added until the complete phase. Once we implement
    // resuming, this may not be true.


    var last = returnFiber.lastEffect;

    if (last !== null) {
      last.nextEffect = childToDelete;
      returnFiber.lastEffect = childToDelete;
    } else {
      returnFiber.firstEffect = returnFiber.lastEffect = childToDelete;
    }

    childToDelete.nextEffect = null;
    childToDelete.effectTag = Deletion;
  }

  function deleteRemainingChildren(returnFiber, currentFirstChild) {
    if (!shouldTrackSideEffects) {
      // Noop.
      return null;
    } // TODO: For the shouldClone case, this could be micro-optimized a bit by
    // assuming that after the first child we've already added everything.


    var childToDelete = currentFirstChild;

    while (childToDelete !== null) {
      deleteChild(returnFiber, childToDelete);
      childToDelete = childToDelete.sibling;
    }

    return null;
  }

  function mapRemainingChildren(returnFiber, currentFirstChild) {
    // Add the remaining children to a temporary map so that we can find them by
    // keys quickly. Implicit (null) keys get added to this set with their index
    // instead.
    var existingChildren = new Map();
    var existingChild = currentFirstChild;

    while (existingChild !== null) {
      if (existingChild.key !== null) {
        existingChildren.set(existingChild.key, existingChild);
      } else {
        existingChildren.set(existingChild.index, existingChild);
      }

      existingChild = existingChild.sibling;
    }

    return existingChildren;
  }

  function useFiber(fiber, pendingProps, expirationTime) {
    // We currently set sibling to null and index to 0 here because it is easy
    // to forget to do before returning it. E.g. for the single child case.
    var clone = createWorkInProgress(fiber, pendingProps, expirationTime);
    clone.index = 0;
    clone.sibling = null;
    return clone;
  }

  function placeChild(newFiber, lastPlacedIndex, newIndex) {
    newFiber.index = newIndex;

    if (!shouldTrackSideEffects) {
      // Noop.
      return lastPlacedIndex;
    }

    var current$$1 = newFiber.alternate;

    if (current$$1 !== null) {
      var oldIndex = current$$1.index;

      if (oldIndex < lastPlacedIndex) {
        // This is a move.
        newFiber.effectTag = Placement;
        return lastPlacedIndex;
      } else {
        // This item can stay in place.
        return oldIndex;
      }
    } else {
      // This is an insertion.
      newFiber.effectTag = Placement;
      return lastPlacedIndex;
    }
  }

  function placeSingleChild(newFiber) {
    // This is simpler for the single child case. We only need to do a
    // placement for inserting new children.
    if (shouldTrackSideEffects && newFiber.alternate === null) {
      newFiber.effectTag = Placement;
    }

    return newFiber;
  }

  function updateTextNode(returnFiber, current$$1, textContent, expirationTime) {
    if (current$$1 === null || current$$1.tag !== HostText) {
      // Insert
      var created = createFiberFromText(textContent, returnFiber.mode, expirationTime);
      created.return = returnFiber;
      return created;
    } else {
      // Update
      var existing = useFiber(current$$1, textContent, expirationTime);
      existing.return = returnFiber;
      return existing;
    }
  }

  function updateElement(returnFiber, current$$1, element, expirationTime) {
    if (current$$1 !== null && (current$$1.elementType === element.type || ( // Keep this check inline so it only runs on the false path:
    isCompatibleFamilyForHotReloading(current$$1, element)))) {
      // Move based on index
      var existing = useFiber(current$$1, element.props, expirationTime);
      existing.ref = coerceRef(returnFiber, current$$1, element);
      existing.return = returnFiber;

      {
        existing._debugSource = element._source;
        existing._debugOwner = element._owner;
      }

      return existing;
    } else {
      // Insert
      var created = createFiberFromElement(element, returnFiber.mode, expirationTime);
      created.ref = coerceRef(returnFiber, current$$1, element);
      created.return = returnFiber;
      return created;
    }
  }

  function updatePortal(returnFiber, current$$1, portal, expirationTime) {
    if (current$$1 === null || current$$1.tag !== HostPortal || current$$1.stateNode.containerInfo !== portal.containerInfo || current$$1.stateNode.implementation !== portal.implementation) {
      // Insert
      var created = createFiberFromPortal(portal, returnFiber.mode, expirationTime);
      created.return = returnFiber;
      return created;
    } else {
      // Update
      var existing = useFiber(current$$1, portal.children || [], expirationTime);
      existing.return = returnFiber;
      return existing;
    }
  }

  function updateFragment(returnFiber, current$$1, fragment, expirationTime, key) {
    if (current$$1 === null || current$$1.tag !== Fragment) {
      // Insert
      var created = createFiberFromFragment(fragment, returnFiber.mode, expirationTime, key);
      created.return = returnFiber;
      return created;
    } else {
      // Update
      var existing = useFiber(current$$1, fragment, expirationTime);
      existing.return = returnFiber;
      return existing;
    }
  }

  function createChild(returnFiber, newChild, expirationTime) {
    if (typeof newChild === 'string' || typeof newChild === 'number') {
      // Text nodes don't have keys. If the previous node is implicitly keyed
      // we can continue to replace it without aborting even if it is not a text
      // node.
      var created = createFiberFromText('' + newChild, returnFiber.mode, expirationTime);
      created.return = returnFiber;
      return created;
    }

    if (typeof newChild === 'object' && newChild !== null) {
      switch (newChild.$$typeof) {
        case REACT_ELEMENT_TYPE:
          {
            var _created = createFiberFromElement(newChild, returnFiber.mode, expirationTime);

            _created.ref = coerceRef(returnFiber, null, newChild);
            _created.return = returnFiber;
            return _created;
          }

        case REACT_PORTAL_TYPE:
          {
            var _created2 = createFiberFromPortal(newChild, returnFiber.mode, expirationTime);

            _created2.return = returnFiber;
            return _created2;
          }
      }

      if (isArray(newChild) || getIteratorFn(newChild)) {
        var _created3 = createFiberFromFragment(newChild, returnFiber.mode, expirationTime, null);

        _created3.return = returnFiber;
        return _created3;
      }

      throwOnInvalidObjectType(returnFiber, newChild);
    }

    {
      if (typeof newChild === 'function') {
        warnOnFunctionType();
      }
    }

    return null;
  }

  function updateSlot(returnFiber, oldFiber, newChild, expirationTime) {
    // Update the fiber if the keys match, otherwise return null.
    var key = oldFiber !== null ? oldFiber.key : null;

    if (typeof newChild === 'string' || typeof newChild === 'number') {
      // Text nodes don't have keys. If the previous node is implicitly keyed
      // we can continue to replace it without aborting even if it is not a text
      // node.
      if (key !== null) {
        return null;
      }

      return updateTextNode(returnFiber, oldFiber, '' + newChild, expirationTime);
    }

    if (typeof newChild === 'object' && newChild !== null) {
      switch (newChild.$$typeof) {
        case REACT_ELEMENT_TYPE:
          {
            if (newChild.key === key) {
              if (newChild.type === REACT_FRAGMENT_TYPE) {
                return updateFragment(returnFiber, oldFiber, newChild.props.children, expirationTime, key);
              }

              return updateElement(returnFiber, oldFiber, newChild, expirationTime);
            } else {
              return null;
            }
          }

        case REACT_PORTAL_TYPE:
          {
            if (newChild.key === key) {
              return updatePortal(returnFiber, oldFiber, newChild, expirationTime);
            } else {
              return null;
            }
          }
      }

      if (isArray(newChild) || getIteratorFn(newChild)) {
        if (key !== null) {
          return null;
        }

        return updateFragment(returnFiber, oldFiber, newChild, expirationTime, null);
      }

      throwOnInvalidObjectType(returnFiber, newChild);
    }

    {
      if (typeof newChild === 'function') {
        warnOnFunctionType();
      }
    }

    return null;
  }

  function updateFromMap(existingChildren, returnFiber, newIdx, newChild, expirationTime) {
    if (typeof newChild === 'string' || typeof newChild === 'number') {
      // Text nodes don't have keys, so we neither have to check the old nor
      // new node for the key. If both are text nodes, they match.
      var matchedFiber = existingChildren.get(newIdx) || null;
      return updateTextNode(returnFiber, matchedFiber, '' + newChild, expirationTime);
    }

    if (typeof newChild === 'object' && newChild !== null) {
      switch (newChild.$$typeof) {
        case REACT_ELEMENT_TYPE:
          {
            var _matchedFiber = existingChildren.get(newChild.key === null ? newIdx : newChild.key) || null;

            if (newChild.type === REACT_FRAGMENT_TYPE) {
              return updateFragment(returnFiber, _matchedFiber, newChild.props.children, expirationTime, newChild.key);
            }

            return updateElement(returnFiber, _matchedFiber, newChild, expirationTime);
          }

        case REACT_PORTAL_TYPE:
          {
            var _matchedFiber2 = existingChildren.get(newChild.key === null ? newIdx : newChild.key) || null;

            return updatePortal(returnFiber, _matchedFiber2, newChild, expirationTime);
          }
      }

      if (isArray(newChild) || getIteratorFn(newChild)) {
        var _matchedFiber3 = existingChildren.get(newIdx) || null;

        return updateFragment(returnFiber, _matchedFiber3, newChild, expirationTime, null);
      }

      throwOnInvalidObjectType(returnFiber, newChild);
    }

    {
      if (typeof newChild === 'function') {
        warnOnFunctionType();
      }
    }

    return null;
  }
  /**
   * Warns if there is a duplicate or missing key
   */


  function warnOnInvalidKey(child, knownKeys) {
    {
      if (typeof child !== 'object' || child === null) {
        return knownKeys;
      }

      switch (child.$$typeof) {
        case REACT_ELEMENT_TYPE:
        case REACT_PORTAL_TYPE:
          warnForMissingKey(child);
          var key = child.key;

          if (typeof key !== 'string') {
            break;
          }

          if (knownKeys === null) {
            knownKeys = new Set();
            knownKeys.add(key);
            break;
          }

          if (!knownKeys.has(key)) {
            knownKeys.add(key);
            break;
          }

          warning$1(false, 'Encountered two children with the same key, `%s`. ' + 'Keys should be unique so that components maintain their identity ' + 'across updates. Non-unique keys may cause children to be ' + 'duplicated and/or omitted — the behavior is unsupported and ' + 'could change in a future version.', key);
          break;

        default:
          break;
      }
    }

    return knownKeys;
  }

  function reconcileChildrenArray(returnFiber, currentFirstChild, newChildren, expirationTime) {
    // This algorithm can't optimize by searching from both ends since we
    // don't have backpointers on fibers. I'm trying to see how far we can get
    // with that model. If it ends up not being worth the tradeoffs, we can
    // add it later.
    // Even with a two ended optimization, we'd want to optimize for the case
    // where there are few changes and brute force the comparison instead of
    // going for the Map. It'd like to explore hitting that path first in
    // forward-only mode and only go for the Map once we notice that we need
    // lots of look ahead. This doesn't handle reversal as well as two ended
    // search but that's unusual. Besides, for the two ended optimization to
    // work on Iterables, we'd need to copy the whole set.
    // In this first iteration, we'll just live with hitting the bad case
    // (adding everything to a Map) in for every insert/move.
    // If you change this code, also update reconcileChildrenIterator() which
    // uses the same algorithm.
    {
      // First, validate keys.
      var knownKeys = null;

      for (var i = 0; i < newChildren.length; i++) {
        var child = newChildren[i];
        knownKeys = warnOnInvalidKey(child, knownKeys);
      }
    }

    var resultingFirstChild = null;
    var previousNewFiber = null;
    var oldFiber = currentFirstChild;
    var lastPlacedIndex = 0;
    var newIdx = 0;
    var nextOldFiber = null;

    for (; oldFiber !== null && newIdx < newChildren.length; newIdx++) {
      if (oldFiber.index > newIdx) {
        nextOldFiber = oldFiber;
        oldFiber = null;
      } else {
        nextOldFiber = oldFiber.sibling;
      }

      var newFiber = updateSlot(returnFiber, oldFiber, newChildren[newIdx], expirationTime);

      if (newFiber === null) {
        // TODO: This breaks on empty slots like null children. That's
        // unfortunate because it triggers the slow path all the time. We need
        // a better way to communicate whether this was a miss or null,
        // boolean, undefined, etc.
        if (oldFiber === null) {
          oldFiber = nextOldFiber;
        }

        break;
      }

      if (shouldTrackSideEffects) {
        if (oldFiber && newFiber.alternate === null) {
          // We matched the slot, but we didn't reuse the existing fiber, so we
          // need to delete the existing child.
          deleteChild(returnFiber, oldFiber);
        }
      }

      lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);

      if (previousNewFiber === null) {
        // TODO: Move out of the loop. This only happens for the first run.
        resultingFirstChild = newFiber;
      } else {
        // TODO: Defer siblings if we're not at the right index for this slot.
        // I.e. if we had null values before, then we want to defer this
        // for each null value. However, we also don't want to call updateSlot
        // with the previous one.
        previousNewFiber.sibling = newFiber;
      }

      previousNewFiber = newFiber;
      oldFiber = nextOldFiber;
    }

    if (newIdx === newChildren.length) {
      // We've reached the end of the new children. We can delete the rest.
      deleteRemainingChildren(returnFiber, oldFiber);
      return resultingFirstChild;
    }

    if (oldFiber === null) {
      // If we don't have any more existing children we can choose a fast path
      // since the rest will all be insertions.
      for (; newIdx < newChildren.length; newIdx++) {
        var _newFiber = createChild(returnFiber, newChildren[newIdx], expirationTime);

        if (_newFiber === null) {
          continue;
        }

        lastPlacedIndex = placeChild(_newFiber, lastPlacedIndex, newIdx);

        if (previousNewFiber === null) {
          // TODO: Move out of the loop. This only happens for the first run.
          resultingFirstChild = _newFiber;
        } else {
          previousNewFiber.sibling = _newFiber;
        }

        previousNewFiber = _newFiber;
      }

      return resultingFirstChild;
    } // Add all children to a key map for quick lookups.


    var existingChildren = mapRemainingChildren(returnFiber, oldFiber); // Keep scanning and use the map to restore deleted items as moves.

    for (; newIdx < newChildren.length; newIdx++) {
      var _newFiber2 = updateFromMap(existingChildren, returnFiber, newIdx, newChildren[newIdx], expirationTime);

      if (_newFiber2 !== null) {
        if (shouldTrackSideEffects) {
          if (_newFiber2.alternate !== null) {
            // The new fiber is a work in progress, but if there exists a
            // current, that means that we reused the fiber. We need to delete
            // it from the child list so that we don't add it to the deletion
            // list.
            existingChildren.delete(_newFiber2.key === null ? newIdx : _newFiber2.key);
          }
        }

        lastPlacedIndex = placeChild(_newFiber2, lastPlacedIndex, newIdx);

        if (previousNewFiber === null) {
          resultingFirstChild = _newFiber2;
        } else {
          previousNewFiber.sibling = _newFiber2;
        }

        previousNewFiber = _newFiber2;
      }
    }

    if (shouldTrackSideEffects) {
      // Any existing children that weren't consumed above were deleted. We need
      // to add them to the deletion list.
      existingChildren.forEach(function (child) {
        return deleteChild(returnFiber, child);
      });
    }

    return resultingFirstChild;
  }

  function reconcileChildrenIterator(returnFiber, currentFirstChild, newChildrenIterable, expirationTime) {
    // This is the same implementation as reconcileChildrenArray(),
    // but using the iterator instead.
    var iteratorFn = getIteratorFn(newChildrenIterable);

    if (!(typeof iteratorFn === 'function')) {
      {
        throw Error("An object is not an iterable. This error is likely caused by a bug in React. Please file an issue.");
      }
    }

    {
      // We don't support rendering Generators because it's a mutation.
      // See https://github.com/facebook/react/issues/12995
      if (typeof Symbol === 'function' && // $FlowFixMe Flow doesn't know about toStringTag
      newChildrenIterable[Symbol.toStringTag] === 'Generator') {
        !didWarnAboutGenerators ? warning$1(false, 'Using Generators as children is unsupported and will likely yield ' + 'unexpected results because enumerating a generator mutates it. ' + 'You may convert it to an array with `Array.from()` or the ' + '`[...spread]` operator before rendering. Keep in mind ' + 'you might need to polyfill these features for older browsers.') : void 0;
        didWarnAboutGenerators = true;
      } // Warn about using Maps as children


      if (newChildrenIterable.entries === iteratorFn) {
        !didWarnAboutMaps ? warning$1(false, 'Using Maps as children is unsupported and will likely yield ' + 'unexpected results. Convert it to a sequence/iterable of keyed ' + 'ReactElements instead.') : void 0;
        didWarnAboutMaps = true;
      } // First, validate keys.
      // We'll get a different iterator later for the main pass.


      var _newChildren = iteratorFn.call(newChildrenIterable);

      if (_newChildren) {
        var knownKeys = null;

        var _step = _newChildren.next();

        for (; !_step.done; _step = _newChildren.next()) {
          var child = _step.value;
          knownKeys = warnOnInvalidKey(child, knownKeys);
        }
      }
    }

    var newChildren = iteratorFn.call(newChildrenIterable);

    if (!(newChildren != null)) {
      {
        throw Error("An iterable object provided no iterator.");
      }
    }

    var resultingFirstChild = null;
    var previousNewFiber = null;
    var oldFiber = currentFirstChild;
    var lastPlacedIndex = 0;
    var newIdx = 0;
    var nextOldFiber = null;
    var step = newChildren.next();

    for (; oldFiber !== null && !step.done; newIdx++, step = newChildren.next()) {
      if (oldFiber.index > newIdx) {
        nextOldFiber = oldFiber;
        oldFiber = null;
      } else {
        nextOldFiber = oldFiber.sibling;
      }

      var newFiber = updateSlot(returnFiber, oldFiber, step.value, expirationTime);

      if (newFiber === null) {
        // TODO: This breaks on empty slots like null children. That's
        // unfortunate because it triggers the slow path all the time. We need
        // a better way to communicate whether this was a miss or null,
        // boolean, undefined, etc.
        if (oldFiber === null) {
          oldFiber = nextOldFiber;
        }

        break;
      }

      if (shouldTrackSideEffects) {
        if (oldFiber && newFiber.alternate === null) {
          // We matched the slot, but we didn't reuse the existing fiber, so we
          // need to delete the existing child.
          deleteChild(returnFiber, oldFiber);
        }
      }

      lastPlacedIndex = placeChild(newFiber, lastPlacedIndex, newIdx);

      if (previousNewFiber === null) {
        // TODO: Move out of the loop. This only happens for the first run.
        resultingFirstChild = newFiber;
      } else {
        // TODO: Defer siblings if we're not at the right index for this slot.
        // I.e. if we had null values before, then we want to defer this
        // for each null value. However, we also don't want to call updateSlot
        // with the previous one.
        previousNewFiber.sibling = newFiber;
      }

      previousNewFiber = newFiber;
      oldFiber = nextOldFiber;
    }

    if (step.done) {
      // We've reached the end of the new children. We can delete the rest.
      deleteRemainingChildren(returnFiber, oldFiber);
      return resultingFirstChild;
    }

    if (oldFiber === null) {
      // If we don't have any more existing children we can choose a fast path
      // since the rest will all be insertions.
      for (; !step.done; newIdx++, step = newChildren.next()) {
        var _newFiber3 = createChild(returnFiber, step.value, expirationTime);

        if (_newFiber3 === null) {
          continue;
        }

        lastPlacedIndex = placeChild(_newFiber3, lastPlacedIndex, newIdx);

        if (previousNewFiber === null) {
          // TODO: Move out of the loop. This only happens for the first run.
          resultingFirstChild = _newFiber3;
        } else {
          previousNewFiber.sibling = _newFiber3;
        }

        previousNewFiber = _newFiber3;
      }

      return resultingFirstChild;
    } // Add all children to a key map for quick lookups.


    var existingChildren = mapRemainingChildren(returnFiber, oldFiber); // Keep scanning and use the map to restore deleted items as moves.

    for (; !step.done; newIdx++, step = newChildren.next()) {
      var _newFiber4 = updateFromMap(existingChildren, returnFiber, newIdx, step.value, expirationTime);

      if (_newFiber4 !== null) {
        if (shouldTrackSideEffects) {
          if (_newFiber4.alternate !== null) {
            // The new fiber is a work in progress, but if there exists a
            // current, that means that we reused the fiber. We need to delete
            // it from the child list so that we don't add it to the deletion
            // list.
            existingChildren.delete(_newFiber4.key === null ? newIdx : _newFiber4.key);
          }
        }

        lastPlacedIndex = placeChild(_newFiber4, lastPlacedIndex, newIdx);

        if (previousNewFiber === null) {
          resultingFirstChild = _newFiber4;
        } else {
          previousNewFiber.sibling = _newFiber4;
        }

        previousNewFiber = _newFiber4;
      }
    }

    if (shouldTrackSideEffects) {
      // Any existing children that weren't consumed above were deleted. We need
      // to add them to the deletion list.
      existingChildren.forEach(function (child) {
        return deleteChild(returnFiber, child);
      });
    }

    return resultingFirstChild;
  }

  function reconcileSingleTextNode(returnFiber, currentFirstChild, textContent, expirationTime) {
    // There's no need to check for keys on text nodes since we don't have a
    // way to define them.
    if (currentFirstChild !== null && currentFirstChild.tag === HostText) {
      // We already have an existing node so let's just update it and delete
      // the rest.
      deleteRemainingChildren(returnFiber, currentFirstChild.sibling);
      var existing = useFiber(currentFirstChild, textContent, expirationTime);
      existing.return = returnFiber;
      return existing;
    } // The existing first child is not a text node so we need to create one
    // and delete the existing ones.


    deleteRemainingChildren(returnFiber, currentFirstChild);
    var created = createFiberFromText(textContent, returnFiber.mode, expirationTime);
    created.return = returnFiber;
    return created;
  }

  function reconcileSingleElement(returnFiber, currentFirstChild, element, expirationTime) {
    var key = element.key;
    var child = currentFirstChild;

    while (child !== null) {
      // TODO: If key === null and child.key === null, then this only applies to
      // the first item in the list.
      if (child.key === key) {
        if (child.tag === Fragment ? element.type === REACT_FRAGMENT_TYPE : child.elementType === element.type || ( // Keep this check inline so it only runs on the false path:
        isCompatibleFamilyForHotReloading(child, element))) {
          deleteRemainingChildren(returnFiber, child.sibling);
          var existing = useFiber(child, element.type === REACT_FRAGMENT_TYPE ? element.props.children : element.props, expirationTime);
          existing.ref = coerceRef(returnFiber, child, element);
          existing.return = returnFiber;

          {
            existing._debugSource = element._source;
            existing._debugOwner = element._owner;
          }

          return existing;
        } else {
          deleteRemainingChildren(returnFiber, child);
          break;
        }
      } else {
        deleteChild(returnFiber, child);
      }

      child = child.sibling;
    }

    if (element.type === REACT_FRAGMENT_TYPE) {
      var created = createFiberFromFragment(element.props.children, returnFiber.mode, expirationTime, element.key);
      created.return = returnFiber;
      return created;
    } else {
      var _created4 = createFiberFromElement(element, returnFiber.mode, expirationTime);

      _created4.ref = coerceRef(returnFiber, currentFirstChild, element);
      _created4.return = returnFiber;
      return _created4;
    }
  }

  function reconcileSinglePortal(returnFiber, currentFirstChild, portal, expirationTime) {
    var key = portal.key;
    var child = currentFirstChild;

    while (child !== null) {
      // TODO: If key === null and child.key === null, then this only applies to
      // the first item in the list.
      if (child.key === key) {
        if (child.tag === HostPortal && child.stateNode.containerInfo === portal.containerInfo && child.stateNode.implementation === portal.implementation) {
          deleteRemainingChildren(returnFiber, child.sibling);
          var existing = useFiber(child, portal.children || [], expirationTime);
          existing.return = returnFiber;
          return existing;
        } else {
          deleteRemainingChildren(returnFiber, child);
          break;
        }
      } else {
        deleteChild(returnFiber, child);
      }

      child = child.sibling;
    }

    var created = createFiberFromPortal(portal, returnFiber.mode, expirationTime);
    created.return = returnFiber;
    return created;
  } // This API will tag the children with the side-effect of the reconciliation
  // itself. They will be added to the side-effect list as we pass through the
  // children and the parent.


  function reconcileChildFibers(returnFiber, currentFirstChild, newChild, expirationTime) {
    // This function is not recursive.
    // If the top level item is an array, we treat it as a set of children,
    // not as a fragment. Nested arrays on the other hand will be treated as
    // fragment nodes. Recursion happens at the normal flow.
    // Handle top level unkeyed fragments as if they were arrays.
    // This leads to an ambiguity between <>{[...]}</> and <>...</>.
    // We treat the ambiguous cases above the same.
    var isUnkeyedTopLevelFragment = typeof newChild === 'object' && newChild !== null && newChild.type === REACT_FRAGMENT_TYPE && newChild.key === null;

    if (isUnkeyedTopLevelFragment) {
      newChild = newChild.props.children;
    } // Handle object types


    var isObject = typeof newChild === 'object' && newChild !== null;

    if (isObject) {
      switch (newChild.$$typeof) {
        case REACT_ELEMENT_TYPE:
          return placeSingleChild(reconcileSingleElement(returnFiber, currentFirstChild, newChild, expirationTime));

        case REACT_PORTAL_TYPE:
          return placeSingleChild(reconcileSinglePortal(returnFiber, currentFirstChild, newChild, expirationTime));
      }
    }

    if (typeof newChild === 'string' || typeof newChild === 'number') {
      return placeSingleChild(reconcileSingleTextNode(returnFiber, currentFirstChild, '' + newChild, expirationTime));
    }

    if (isArray(newChild)) {
      return reconcileChildrenArray(returnFiber, currentFirstChild, newChild, expirationTime);
    }

    if (getIteratorFn(newChild)) {
      return reconcileChildrenIterator(returnFiber, currentFirstChild, newChild, expirationTime);
    }

    if (isObject) {
      throwOnInvalidObjectType(returnFiber, newChild);
    }

    {
      if (typeof newChild === 'function') {
        warnOnFunctionType();
      }
    }

    if (typeof newChild === 'undefined' && !isUnkeyedTopLevelFragment) {
      // If the new child is undefined, and the return fiber is a composite
      // component, throw an error. If Fiber return types are disabled,
      // we already threw above.
      switch (returnFiber.tag) {
        case ClassComponent:
          {
            {
              var instance = returnFiber.stateNode;

              if (instance.render._isMockFunction) {
                // We allow auto-mocks to proceed as if they're returning null.
                break;
              }
            }
          }
        // Intentionally fall through to the next case, which handles both
        // functions and classes
        // eslint-disable-next-lined no-fallthrough

        case FunctionComponent:
          {
            var Component = returnFiber.type;

            {
              {
                throw Error((Component.displayName || Component.name || 'Component') + "(...): Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null.");
              }
            }
          }
      }
    } // Remaining cases are all treated as empty.


    return deleteRemainingChildren(returnFiber, currentFirstChild);
  }

  return reconcileChildFibers;
}

var reconcileChildFibers = ChildReconciler(true);
var mountChildFibers = ChildReconciler(false);
function cloneChildFibers(current$$1, workInProgress) {
  if (!(current$$1 === null || workInProgress.child === current$$1.child)) {
    {
      throw Error("Resuming work not yet implemented.");
    }
  }

  if (workInProgress.child === null) {
    return;
  }

  var currentChild = workInProgress.child;
  var newChild = createWorkInProgress(currentChild, currentChild.pendingProps, currentChild.expirationTime);
  workInProgress.child = newChild;
  newChild.return = workInProgress;

  while (currentChild.sibling !== null) {
    currentChild = currentChild.sibling;
    newChild = newChild.sibling = createWorkInProgress(currentChild, currentChild.pendingProps, currentChild.expirationTime);
    newChild.return = workInProgress;
  }

  newChild.sibling = null;
} // Reset a workInProgress child set to prepare it for a second pass.

function resetChildFibers(workInProgress, renderExpirationTime) {
  var child = workInProgress.child;

  while (child !== null) {
    resetWorkInProgress(child, renderExpirationTime);
    child = child.sibling;
  }
}

var NO_CONTEXT = {};
var contextStackCursor$1 = createCursor(NO_CONTEXT);
var contextFiberStackCursor = createCursor(NO_CONTEXT);
var rootInstanceStackCursor = createCursor(NO_CONTEXT);

function requiredContext(c) {
  if (!(c !== NO_CONTEXT)) {
    {
      throw Error("Expected host context to exist. This error is likely caused by a bug in React. Please file an issue.");
    }
  }

  return c;
}

function getRootHostContainer() {
  var rootInstance = requiredContext(rootInstanceStackCursor.current);
  return rootInstance;
}

function pushHostContainer(fiber, nextRootInstance) {
  // Push current root instance onto the stack;
  // This allows us to reset root when portals are popped.
  push(rootInstanceStackCursor, nextRootInstance, fiber); // Track the context and the Fiber that provided it.
  // This enables us to pop only Fibers that provide unique contexts.

  push(contextFiberStackCursor, fiber, fiber); // Finally, we need to push the host context to the stack.
  // However, we can't just call getRootHostContext() and push it because
  // we'd have a different number of entries on the stack depending on
  // whether getRootHostContext() throws somewhere in renderer code or not.
  // So we push an empty value first. This lets us safely unwind on errors.

  push(contextStackCursor$1, NO_CONTEXT, fiber);
  var nextRootContext = getRootHostContext(nextRootInstance); // Now that we know this function doesn't throw, replace it.

  pop(contextStackCursor$1, fiber);
  push(contextStackCursor$1, nextRootContext, fiber);
}

function popHostContainer(fiber) {
  pop(contextStackCursor$1, fiber);
  pop(contextFiberStackCursor, fiber);
  pop(rootInstanceStackCursor, fiber);
}

function getHostContext() {
  var context = requiredContext(contextStackCursor$1.current);
  return context;
}

function pushHostContext(fiber) {
  var rootInstance = requiredContext(rootInstanceStackCursor.current);
  var context = requiredContext(contextStackCursor$1.current);
  var nextContext = getChildHostContext(context, fiber.type, rootInstance); // Don't push this Fiber's context unless it's unique.

  if (context === nextContext) {
    return;
  } // Track the context and the Fiber that provided it.
  // This enables us to pop only Fibers that provide unique contexts.


  push(contextFiberStackCursor, fiber, fiber);
  push(contextStackCursor$1, nextContext, fiber);
}

function popHostContext(fiber) {
  // Do not pop unless this Fiber provided the current context.
  // pushHostContext() only pushes Fibers that provide unique contexts.
  if (contextFiberStackCursor.current !== fiber) {
    return;
  }

  pop(contextStackCursor$1, fiber);
  pop(contextFiberStackCursor, fiber);
}

var DefaultSuspenseContext = 0; // The Suspense Context is split into two parts. The lower bits is
// inherited deeply down the subtree. The upper bits only affect
// this immediate suspense boundary and gets reset each new
// boundary or suspense list.

var SubtreeSuspenseContextMask = 1; // Subtree Flags:
// InvisibleParentSuspenseContext indicates that one of our parent Suspense
// boundaries is not currently showing visible main content.
// Either because it is already showing a fallback or is not mounted at all.
// We can use this to determine if it is desirable to trigger a fallback at
// the parent. If not, then we might need to trigger undesirable boundaries
// and/or suspend the commit to avoid hiding the parent content.

var InvisibleParentSuspenseContext = 1; // Shallow Flags:
// ForceSuspenseFallback can be used by SuspenseList to force newly added
// items into their fallback state during one of the render passes.

var ForceSuspenseFallback = 2;
var suspenseStackCursor = createCursor(DefaultSuspenseContext);
function hasSuspenseContext(parentContext, flag) {
  return (parentContext & flag) !== 0;
}
function setDefaultShallowSuspenseContext(parentContext) {
  return parentContext & SubtreeSuspenseContextMask;
}
function setShallowSuspenseContext(parentContext, shallowContext) {
  return parentContext & SubtreeSuspenseContextMask | shallowContext;
}
function addSubtreeSuspenseContext(parentContext, subtreeContext) {
  return parentContext | subtreeContext;
}
function pushSuspenseContext(fiber, newContext) {
  push(suspenseStackCursor, newContext, fiber);
}
function popSuspenseContext(fiber) {
  pop(suspenseStackCursor, fiber);
}

function shouldCaptureSuspense(workInProgress, hasInvisibleParent) {
  // If it was the primary children that just suspended, capture and render the
  // fallback. Otherwise, don't capture and bubble to the next boundary.
  var nextState = workInProgress.memoizedState;

  if (nextState !== null) {
    if (nextState.dehydrated !== null) {
      // A dehydrated boundary always captures.
      return true;
    }

    return false;
  }

  var props = workInProgress.memoizedProps; // In order to capture, the Suspense component must have a fallback prop.

  if (props.fallback === undefined) {
    return false;
  } // Regular boundaries always capture.


  if (props.unstable_avoidThisFallback !== true) {
    return true;
  } // If it's a boundary we should avoid, then we prefer to bubble up to the
  // parent boundary if it is currently invisible.


  if (hasInvisibleParent) {
    return false;
  } // If the parent is not able to handle it, we must handle it.


  return true;
}
function findFirstSuspended(row) {
  var node = row;

  while (node !== null) {
    if (node.tag === SuspenseComponent) {
      var state = node.memoizedState;

      if (state !== null) {
        var dehydrated = state.dehydrated;

        if (dehydrated === null || isSuspenseInstancePending(dehydrated) || isSuspenseInstanceFallback(dehydrated)) {
          return node;
        }
      }
    } else if (node.tag === SuspenseListComponent && // revealOrder undefined can't be trusted because it don't
    // keep track of whether it suspended or not.
    node.memoizedProps.revealOrder !== undefined) {
      var didSuspend = (node.effectTag & DidCapture) !== NoEffect;

      if (didSuspend) {
        return node;
      }
    } else if (node.child !== null) {
      node.child.return = node;
      node = node.child;
      continue;
    }

    if (node === row) {
      return null;
    }

    while (node.sibling === null) {
      if (node.return === null || node.return === row) {
        return null;
      }

      node = node.return;
    }

    node.sibling.return = node.return;
    node = node.sibling;
  }

  return null;
}

var emptyObject = {};
var isArray$2 = Array.isArray;
function createResponderInstance(responder, responderProps, responderState, fiber) {
  return {
    fiber: fiber,
    props: responderProps,
    responder: responder,
    rootEventTypes: null,
    state: responderState
  };
}

function mountEventResponder$1(responder, responderProps, fiber, respondersMap, rootContainerInstance) {
  var responderState = emptyObject;
  var getInitialState = responder.getInitialState;

  if (getInitialState !== null) {
    responderState = getInitialState(responderProps);
  }

  var responderInstance = createResponderInstance(responder, responderProps, responderState, fiber);

  if (!rootContainerInstance) {
    var node = fiber;

    while (node !== null) {
      var tag = node.tag;

      if (tag === HostComponent) {
        rootContainerInstance = node.stateNode;
        break;
      } else if (tag === HostRoot) {
        rootContainerInstance = node.stateNode.containerInfo;
        break;
      }

      node = node.return;
    }
  }

  mountResponderInstance(responder, responderInstance, responderProps, responderState, rootContainerInstance);
  respondersMap.set(responder, responderInstance);
}

function updateEventListener(listener, fiber, visistedResponders, respondersMap, rootContainerInstance) {
  var responder;
  var props;

  if (listener) {
    responder = listener.responder;
    props = listener.props;
  }

  if (!(responder && responder.$$typeof === REACT_RESPONDER_TYPE)) {
    {
      throw Error("An invalid value was used as an event listener. Expect one or many event listeners created via React.unstable_useResponder().");
    }
  }

  var listenerProps = props;

  if (visistedResponders.has(responder)) {
    // show warning
    {
      warning$1(false, 'Duplicate event responder "%s" found in event listeners. ' + 'Event listeners passed to elements cannot use the same event responder more than once.', responder.displayName);
    }

    return;
  }

  visistedResponders.add(responder);
  var responderInstance = respondersMap.get(responder);

  if (responderInstance === undefined) {
    // Mount (happens in either complete or commit phase)
    mountEventResponder$1(responder, listenerProps, fiber, respondersMap, rootContainerInstance);
  } else {
    // Update (happens during commit phase only)
    responderInstance.props = listenerProps;
    responderInstance.fiber = fiber;
  }
}

function updateEventListeners(listeners, fiber, rootContainerInstance) {
  var visistedResponders = new Set();
  var dependencies = fiber.dependencies;

  if (listeners != null) {
    if (dependencies === null) {
      dependencies = fiber.dependencies = {
        expirationTime: NoWork,
        firstContext: null,
        responders: new Map()
      };
    }

    var respondersMap = dependencies.responders;

    if (respondersMap === null) {
      respondersMap = new Map();
    }

    if (isArray$2(listeners)) {
      for (var i = 0, length = listeners.length; i < length; i++) {
        var listener = listeners[i];
        updateEventListener(listener, fiber, visistedResponders, respondersMap, rootContainerInstance);
      }
    } else {
      updateEventListener(listeners, fiber, visistedResponders, respondersMap, rootContainerInstance);
    }
  }

  if (dependencies !== null) {
    var _respondersMap = dependencies.responders;

    if (_respondersMap !== null) {
      // Unmount
      var mountedResponders = Array.from(_respondersMap.keys());

      for (var _i = 0, _length = mountedResponders.length; _i < _length; _i++) {
        var mountedResponder = mountedResponders[_i];

        if (!visistedResponders.has(mountedResponder)) {
          var responderInstance = _respondersMap.get(mountedResponder);

          unmountResponderInstance(responderInstance);

          _respondersMap.delete(mountedResponder);
        }
      }
    }
  }
}
function createResponderListener(responder, props) {
  var eventResponderListener = {
    responder: responder,
    props: props
  };

  {
    Object.freeze(eventResponderListener);
  }

  return eventResponderListener;
}

var NoEffect$1 =
/*             */
0;
var UnmountSnapshot =
/*      */
2;
var UnmountMutation =
/*      */
4;
var MountMutation =
/*        */
8;
var UnmountLayout =
/*        */
16;
var MountLayout =
/*          */
32;
var MountPassive =
/*         */
64;
var UnmountPassive =
/*       */
128;

var ReactCurrentDispatcher$1 = ReactSharedInternals.ReactCurrentDispatcher;
var ReactCurrentBatchConfig$1 = ReactSharedInternals.ReactCurrentBatchConfig;
var didWarnAboutMismatchedHooksForComponent;

{
  didWarnAboutMismatchedHooksForComponent = new Set();
}

// These are set right before calling the component.
var renderExpirationTime$1 = NoWork; // The work-in-progress fiber. I've named it differently to distinguish it from
// the work-in-progress hook.

var currentlyRenderingFiber$1 = null; // Hooks are stored as a linked list on the fiber's memoizedState field. The
// current hook list is the list that belongs to the current fiber. The
// work-in-progress hook list is a new list that will be added to the
// work-in-progress fiber.

var currentHook = null;
var nextCurrentHook = null;
var firstWorkInProgressHook = null;
var workInProgressHook = null;
var nextWorkInProgressHook = null;
var remainingExpirationTime = NoWork;
var componentUpdateQueue = null;
var sideEffectTag = 0; // Updates scheduled during render will trigger an immediate re-render at the
// end of the current pass. We can't store these updates on the normal queue,
// because if the work is aborted, they should be discarded. Because this is
// a relatively rare case, we also don't want to add an additional field to
// either the hook or queue object types. So we store them in a lazily create
// map of queue -> render-phase updates, which are discarded once the component
// completes without re-rendering.
// Whether an update was scheduled during the currently executing render pass.

var didScheduleRenderPhaseUpdate = false; // Lazily created map of render-phase updates

var renderPhaseUpdates = null; // Counter to prevent infinite loops.

var numberOfReRenders = 0;
var RE_RENDER_LIMIT = 25; // In DEV, this is the name of the currently executing primitive hook

var currentHookNameInDev = null; // In DEV, this list ensures that hooks are called in the same order between renders.
// The list stores the order of hooks used during the initial render (mount).
// Subsequent renders (updates) reference this list.

var hookTypesDev = null;
var hookTypesUpdateIndexDev = -1; // In DEV, this tracks whether currently rendering component needs to ignore
// the dependencies for Hooks that need them (e.g. useEffect or useMemo).
// When true, such Hooks will always be "remounted". Only used during hot reload.

var ignorePreviousDependencies = false;

function mountHookTypesDev() {
  {
    var hookName = currentHookNameInDev;

    if (hookTypesDev === null) {
      hookTypesDev = [hookName];
    } else {
      hookTypesDev.push(hookName);
    }
  }
}

function updateHookTypesDev() {
  {
    var hookName = currentHookNameInDev;

    if (hookTypesDev !== null) {
      hookTypesUpdateIndexDev++;

      if (hookTypesDev[hookTypesUpdateIndexDev] !== hookName) {
        warnOnHookMismatchInDev(hookName);
      }
    }
  }
}

function checkDepsAreArrayDev(deps) {
  {
    if (deps !== undefined && deps !== null && !Array.isArray(deps)) {
      // Verify deps, but only on mount to avoid extra checks.
      // It's unlikely their type would change as usually you define them inline.
      warning$1(false, '%s received a final argument that is not an array (instead, received `%s`). When ' + 'specified, the final argument must be an array.', currentHookNameInDev, typeof deps);
    }
  }
}

function warnOnHookMismatchInDev(currentHookName) {
  {
    var componentName = getComponentName(currentlyRenderingFiber$1.type);

    if (!didWarnAboutMismatchedHooksForComponent.has(componentName)) {
      didWarnAboutMismatchedHooksForComponent.add(componentName);

      if (hookTypesDev !== null) {
        var table = '';
        var secondColumnStart = 30;

        for (var i = 0; i <= hookTypesUpdateIndexDev; i++) {
          var oldHookName = hookTypesDev[i];
          var newHookName = i === hookTypesUpdateIndexDev ? currentHookName : oldHookName;
          var row = i + 1 + ". " + oldHookName; // Extra space so second column lines up
          // lol @ IE not supporting String#repeat

          while (row.length < secondColumnStart) {
            row += ' ';
          }

          row += newHookName + '\n';
          table += row;
        }

        warning$1(false, 'React has detected a change in the order of Hooks called by %s. ' + 'This will lead to bugs and errors if not fixed. ' + 'For more information, read the Rules of Hooks: https://fb.me/rules-of-hooks\n\n' + '   Previous render            Next render\n' + '   ------------------------------------------------------\n' + '%s' + '   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n', componentName, table);
      }
    }
  }
}

function throwInvalidHookError() {
  {
    {
      throw Error("Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:\n1. You might have mismatching versions of React and the renderer (such as React DOM)\n2. You might be breaking the Rules of Hooks\n3. You might have more than one copy of React in the same app\nSee https://fb.me/react-invalid-hook-call for tips about how to debug and fix this problem.");
    }
  }
}

function areHookInputsEqual(nextDeps, prevDeps) {
  {
    if (ignorePreviousDependencies) {
      // Only true when this component is being hot reloaded.
      return false;
    }
  }

  if (prevDeps === null) {
    {
      warning$1(false, '%s received a final argument during this render, but not during ' + 'the previous render. Even though the final argument is optional, ' + 'its type cannot change between renders.', currentHookNameInDev);
    }

    return false;
  }

  {
    // Don't bother comparing lengths in prod because these arrays should be
    // passed inline.
    if (nextDeps.length !== prevDeps.length) {
      warning$1(false, 'The final argument passed to %s changed size between renders. The ' + 'order and size of this array must remain constant.\n\n' + 'Previous: %s\n' + 'Incoming: %s', currentHookNameInDev, "[" + prevDeps.join(', ') + "]", "[" + nextDeps.join(', ') + "]");
    }
  }

  for (var i = 0; i < prevDeps.length && i < nextDeps.length; i++) {
    if (is$1(nextDeps[i], prevDeps[i])) {
      continue;
    }

    return false;
  }

  return true;
}

function renderWithHooks(current, workInProgress, Component, props, refOrContext, nextRenderExpirationTime) {
  renderExpirationTime$1 = nextRenderExpirationTime;
  currentlyRenderingFiber$1 = workInProgress;
  nextCurrentHook = current !== null ? current.memoizedState : null;

  {
    hookTypesDev = current !== null ? current._debugHookTypes : null;
    hookTypesUpdateIndexDev = -1; // Used for hot reloading:

    ignorePreviousDependencies = current !== null && current.type !== workInProgress.type;
  } // The following should have already been reset
  // currentHook = null;
  // workInProgressHook = null;
  // remainingExpirationTime = NoWork;
  // componentUpdateQueue = null;
  // didScheduleRenderPhaseUpdate = false;
  // renderPhaseUpdates = null;
  // numberOfReRenders = 0;
  // sideEffectTag = 0;
  // TODO Warn if no hooks are used at all during mount, then some are used during update.
  // Currently we will identify the update render as a mount because nextCurrentHook === null.
  // This is tricky because it's valid for certain types of components (e.g. React.lazy)
  // Using nextCurrentHook to differentiate between mount/update only works if at least one stateful hook is used.
  // Non-stateful hooks (e.g. context) don't get added to memoizedState,
  // so nextCurrentHook would be null during updates and mounts.


  {
    if (nextCurrentHook !== null) {
      ReactCurrentDispatcher$1.current = HooksDispatcherOnUpdateInDEV;
    } else if (hookTypesDev !== null) {
      // This dispatcher handles an edge case where a component is updating,
      // but no stateful hooks have been used.
      // We want to match the production code behavior (which will use HooksDispatcherOnMount),
      // but with the extra DEV validation to ensure hooks ordering hasn't changed.
      // This dispatcher does that.
      ReactCurrentDispatcher$1.current = HooksDispatcherOnMountWithHookTypesInDEV;
    } else {
      ReactCurrentDispatcher$1.current = HooksDispatcherOnMountInDEV;
    }
  }

  var children = Component(props, refOrContext);

  if (didScheduleRenderPhaseUpdate) {
    do {
      didScheduleRenderPhaseUpdate = false;
      numberOfReRenders += 1;

      {
        // Even when hot reloading, allow dependencies to stabilize
        // after first render to prevent infinite render phase updates.
        ignorePreviousDependencies = false;
      } // Start over from the beginning of the list


      nextCurrentHook = current !== null ? current.memoizedState : null;
      nextWorkInProgressHook = firstWorkInProgressHook;
      currentHook = null;
      workInProgressHook = null;
      componentUpdateQueue = null;

      {
        // Also validate hook order for cascading updates.
        hookTypesUpdateIndexDev = -1;
      }

      ReactCurrentDispatcher$1.current = HooksDispatcherOnUpdateInDEV;
      children = Component(props, refOrContext);
    } while (didScheduleRenderPhaseUpdate);

    renderPhaseUpdates = null;
    numberOfReRenders = 0;
  } // We can assume the previous dispatcher is always this one, since we set it
  // at the beginning of the render phase and there's no re-entrancy.


  ReactCurrentDispatcher$1.current = ContextOnlyDispatcher;
  var renderedWork = currentlyRenderingFiber$1;
  renderedWork.memoizedState = firstWorkInProgressHook;
  renderedWork.expirationTime = remainingExpirationTime;
  renderedWork.updateQueue = componentUpdateQueue;
  renderedWork.effectTag |= sideEffectTag;

  {
    renderedWork._debugHookTypes = hookTypesDev;
  } // This check uses currentHook so that it works the same in DEV and prod bundles.
  // hookTypesDev could catch more cases (e.g. context) but only in DEV bundles.


  var didRenderTooFewHooks = currentHook !== null && currentHook.next !== null;
  renderExpirationTime$1 = NoWork;
  currentlyRenderingFiber$1 = null;
  currentHook = null;
  nextCurrentHook = null;
  firstWorkInProgressHook = null;
  workInProgressHook = null;
  nextWorkInProgressHook = null;

  {
    currentHookNameInDev = null;
    hookTypesDev = null;
    hookTypesUpdateIndexDev = -1;
  }

  remainingExpirationTime = NoWork;
  componentUpdateQueue = null;
  sideEffectTag = 0; // These were reset above
  // didScheduleRenderPhaseUpdate = false;
  // renderPhaseUpdates = null;
  // numberOfReRenders = 0;

  if (!!didRenderTooFewHooks) {
    {
      throw Error("Rendered fewer hooks than expected. This may be caused by an accidental early return statement.");
    }
  }

  return children;
}
function bailoutHooks(current, workInProgress, expirationTime) {
  workInProgress.updateQueue = current.updateQueue;
  workInProgress.effectTag &= ~(Passive | Update);

  if (current.expirationTime <= expirationTime) {
    current.expirationTime = NoWork;
  }
}
function resetHooks() {
  // We can assume the previous dispatcher is always this one, since we set it
  // at the beginning of the render phase and there's no re-entrancy.
  ReactCurrentDispatcher$1.current = ContextOnlyDispatcher; // This is used to reset the state of this module when a component throws.
  // It's also called inside mountIndeterminateComponent if we determine the
  // component is a module-style component.

  renderExpirationTime$1 = NoWork;
  currentlyRenderingFiber$1 = null;
  currentHook = null;
  nextCurrentHook = null;
  firstWorkInProgressHook = null;
  workInProgressHook = null;
  nextWorkInProgressHook = null;

  {
    hookTypesDev = null;
    hookTypesUpdateIndexDev = -1;
    currentHookNameInDev = null;
  }

  remainingExpirationTime = NoWork;
  componentUpdateQueue = null;
  sideEffectTag = 0;
  didScheduleRenderPhaseUpdate = false;
  renderPhaseUpdates = null;
  numberOfReRenders = 0;
}

function mountWorkInProgressHook() {
  var hook = {
    memoizedState: null,
    baseState: null,
    queue: null,
    baseUpdate: null,
    next: null
  };

  if (workInProgressHook === null) {
    // This is the first hook in the list
    firstWorkInProgressHook = workInProgressHook = hook;
  } else {
    // Append to the end of the list
    workInProgressHook = workInProgressHook.next = hook;
  }

  return workInProgressHook;
}

function updateWorkInProgressHook() {
  // This function is used both for updates and for re-renders triggered by a
  // render phase update. It assumes there is either a current hook we can
  // clone, or a work-in-progress hook from a previous render pass that we can
  // use as a base. When we reach the end of the base list, we must switch to
  // the dispatcher used for mounts.
  if (nextWorkInProgressHook !== null) {
    // There's already a work-in-progress. Reuse it.
    workInProgressHook = nextWorkInProgressHook;
    nextWorkInProgressHook = workInProgressHook.next;
    currentHook = nextCurrentHook;
    nextCurrentHook = currentHook !== null ? currentHook.next : null;
  } else {
    // Clone from the current hook.
    if (!(nextCurrentHook !== null)) {
      {
        throw Error("Rendered more hooks than during the previous render.");
      }
    }

    currentHook = nextCurrentHook;
    var newHook = {
      memoizedState: currentHook.memoizedState,
      baseState: currentHook.baseState,
      queue: currentHook.queue,
      baseUpdate: currentHook.baseUpdate,
      next: null
    };

    if (workInProgressHook === null) {
      // This is the first hook in the list.
      workInProgressHook = firstWorkInProgressHook = newHook;
    } else {
      // Append to the end of the list.
      workInProgressHook = workInProgressHook.next = newHook;
    }

    nextCurrentHook = currentHook.next;
  }

  return workInProgressHook;
}

function createFunctionComponentUpdateQueue() {
  return {
    lastEffect: null
  };
}

function basicStateReducer(state, action) {
  return typeof action === 'function' ? action(state) : action;
}

function mountReducer(reducer, initialArg, init) {
  var hook = mountWorkInProgressHook();
  var initialState;

  if (init !== undefined) {
    initialState = init(initialArg);
  } else {
    initialState = initialArg;
  }

  hook.memoizedState = hook.baseState = initialState;
  var queue = hook.queue = {
    last: null,
    dispatch: null,
    lastRenderedReducer: reducer,
    lastRenderedState: initialState
  };
  var dispatch = queue.dispatch = dispatchAction.bind(null, // Flow doesn't know this is non-null, but we do.
  currentlyRenderingFiber$1, queue);
  return [hook.memoizedState, dispatch];
}

function updateReducer(reducer, initialArg, init) {
  var hook = updateWorkInProgressHook();
  var queue = hook.queue;

  if (!(queue !== null)) {
    {
      throw Error("Should have a queue. This is likely a bug in React. Please file an issue.");
    }
  }

  queue.lastRenderedReducer = reducer;

  if (numberOfReRenders > 0) {
    // This is a re-render. Apply the new render phase updates to the previous
    // work-in-progress hook.
    var _dispatch = queue.dispatch;

    if (renderPhaseUpdates !== null) {
      // Render phase updates are stored in a map of queue -> linked list
      var firstRenderPhaseUpdate = renderPhaseUpdates.get(queue);

      if (firstRenderPhaseUpdate !== undefined) {
        renderPhaseUpdates.delete(queue);
        var newState = hook.memoizedState;
        var update = firstRenderPhaseUpdate;

        do {
          // Process this render phase update. We don't have to check the
          // priority because it will always be the same as the current
          // render's.
          var action = update.action;
          newState = reducer(newState, action);
          update = update.next;
        } while (update !== null); // Mark that the fiber performed work, but only if the new state is
        // different from the current state.


        if (!is$1(newState, hook.memoizedState)) {
          markWorkInProgressReceivedUpdate();
        }

        hook.memoizedState = newState; // Don't persist the state accumulated from the render phase updates to
        // the base state unless the queue is empty.
        // TODO: Not sure if this is the desired semantics, but it's what we
        // do for gDSFP. I can't remember why.

        if (hook.baseUpdate === queue.last) {
          hook.baseState = newState;
        }

        queue.lastRenderedState = newState;
        return [newState, _dispatch];
      }
    }

    return [hook.memoizedState, _dispatch];
  } // The last update in the entire queue


  var last = queue.last; // The last update that is part of the base state.

  var baseUpdate = hook.baseUpdate;
  var baseState = hook.baseState; // Find the first unprocessed update.

  var first;

  if (baseUpdate !== null) {
    if (last !== null) {
      // For the first update, the queue is a circular linked list where
      // `queue.last.next = queue.first`. Once the first update commits, and
      // the `baseUpdate` is no longer empty, we can unravel the list.
      last.next = null;
    }

    first = baseUpdate.next;
  } else {
    first = last !== null ? last.next : null;
  }

  if (first !== null) {
    var _newState = baseState;
    var newBaseState = null;
    var newBaseUpdate = null;
    var prevUpdate = baseUpdate;
    var _update = first;
    var didSkip = false;

    do {
      var updateExpirationTime = _update.expirationTime;

      if (updateExpirationTime < renderExpirationTime$1) {
        // Priority is insufficient. Skip this update. If this is the first
        // skipped update, the previous update/state is the new base
        // update/state.
        if (!didSkip) {
          didSkip = true;
          newBaseUpdate = prevUpdate;
          newBaseState = _newState;
        } // Update the remaining priority in the queue.


        if (updateExpirationTime > remainingExpirationTime) {
          remainingExpirationTime = updateExpirationTime;
          markUnprocessedUpdateTime(remainingExpirationTime);
        }
      } else {
        // This update does have sufficient priority.
        // Mark the event time of this update as relevant to this render pass.
        // TODO: This should ideally use the true event time of this update rather than
        // its priority which is a derived and not reverseable value.
        // TODO: We should skip this update if it was already committed but currently
        // we have no way of detecting the difference between a committed and suspended
        // update here.
        markRenderEventTimeAndConfig(updateExpirationTime, _update.suspenseConfig); // Process this update.

        if (_update.eagerReducer === reducer) {
          // If this update was processed eagerly, and its reducer matches the
          // current reducer, we can use the eagerly computed state.
          _newState = _update.eagerState;
        } else {
          var _action = _update.action;
          _newState = reducer(_newState, _action);
        }
      }

      prevUpdate = _update;
      _update = _update.next;
    } while (_update !== null && _update !== first);

    if (!didSkip) {
      newBaseUpdate = prevUpdate;
      newBaseState = _newState;
    } // Mark that the fiber performed work, but only if the new state is
    // different from the current state.


    if (!is$1(_newState, hook.memoizedState)) {
      markWorkInProgressReceivedUpdate();
    }

    hook.memoizedState = _newState;
    hook.baseUpdate = newBaseUpdate;
    hook.baseState = newBaseState;
    queue.lastRenderedState = _newState;
  }

  var dispatch = queue.dispatch;
  return [hook.memoizedState, dispatch];
}

function mountState(initialState) {
  var hook = mountWorkInProgressHook();

  if (typeof initialState === 'function') {
    initialState = initialState();
  }

  hook.memoizedState = hook.baseState = initialState;
  var queue = hook.queue = {
    last: null,
    dispatch: null,
    lastRenderedReducer: basicStateReducer,
    lastRenderedState: initialState
  };
  var dispatch = queue.dispatch = dispatchAction.bind(null, // Flow doesn't know this is non-null, but we do.
  currentlyRenderingFiber$1, queue);
  return [hook.memoizedState, dispatch];
}

function updateState(initialState) {
  return updateReducer(basicStateReducer, initialState);
}

function pushEffect(tag, create, destroy, deps) {
  var effect = {
    tag: tag,
    create: create,
    destroy: destroy,
    deps: deps,
    // Circular
    next: null
  };

  if (componentUpdateQueue === null) {
    componentUpdateQueue = createFunctionComponentUpdateQueue();
    componentUpdateQueue.lastEffect = effect.next = effect;
  } else {
    var lastEffect = componentUpdateQueue.lastEffect;

    if (lastEffect === null) {
      componentUpdateQueue.lastEffect = effect.next = effect;
    } else {
      var firstEffect = lastEffect.next;
      lastEffect.next = effect;
      effect.next = firstEffect;
      componentUpdateQueue.lastEffect = effect;
    }
  }

  return effect;
}

function mountRef(initialValue) {
  var hook = mountWorkInProgressHook();
  var ref = {
    current: initialValue
  };

  {
    Object.seal(ref);
  }

  hook.memoizedState = ref;
  return ref;
}

function updateRef(initialValue) {
  var hook = updateWorkInProgressHook();
  return hook.memoizedState;
}

function mountEffectImpl(fiberEffectTag, hookEffectTag, create, deps) {
  var hook = mountWorkInProgressHook();
  var nextDeps = deps === undefined ? null : deps;
  sideEffectTag |= fiberEffectTag;
  hook.memoizedState = pushEffect(hookEffectTag, create, undefined, nextDeps);
}

function updateEffectImpl(fiberEffectTag, hookEffectTag, create, deps) {
  var hook = updateWorkInProgressHook();
  var nextDeps = deps === undefined ? null : deps;
  var destroy = undefined;

  if (currentHook !== null) {
    var prevEffect = currentHook.memoizedState;
    destroy = prevEffect.destroy;

    if (nextDeps !== null) {
      var prevDeps = prevEffect.deps;

      if (areHookInputsEqual(nextDeps, prevDeps)) {
        pushEffect(NoEffect$1, create, destroy, nextDeps);
        return;
      }
    }
  }

  sideEffectTag |= fiberEffectTag;
  hook.memoizedState = pushEffect(hookEffectTag, create, destroy, nextDeps);
}

function mountEffect(create, deps) {
  {
    // $FlowExpectedError - jest isn't a global, and isn't recognized outside of tests
    if ('undefined' !== typeof jest) {
      warnIfNotCurrentlyActingEffectsInDEV(currentlyRenderingFiber$1);
    }
  }

  return mountEffectImpl(Update | Passive, UnmountPassive | MountPassive, create, deps);
}

function updateEffect(create, deps) {
  {
    // $FlowExpectedError - jest isn't a global, and isn't recognized outside of tests
    if ('undefined' !== typeof jest) {
      warnIfNotCurrentlyActingEffectsInDEV(currentlyRenderingFiber$1);
    }
  }

  return updateEffectImpl(Update | Passive, UnmountPassive | MountPassive, create, deps);
}

function mountLayoutEffect(create, deps) {
  return mountEffectImpl(Update, UnmountMutation | MountLayout, create, deps);
}

function updateLayoutEffect(create, deps) {
  return updateEffectImpl(Update, UnmountMutation | MountLayout, create, deps);
}

function imperativeHandleEffect(create, ref) {
  if (typeof ref === 'function') {
    var refCallback = ref;

    var _inst = create();

    refCallback(_inst);
    return function () {
      refCallback(null);
    };
  } else if (ref !== null && ref !== undefined) {
    var refObject = ref;

    {
      !refObject.hasOwnProperty('current') ? warning$1(false, 'Expected useImperativeHandle() first argument to either be a ' + 'ref callback or React.createRef() object. Instead received: %s.', 'an object with keys {' + Object.keys(refObject).join(', ') + '}') : void 0;
    }

    var _inst2 = create();

    refObject.current = _inst2;
    return function () {
      refObject.current = null;
    };
  }
}

function mountImperativeHandle(ref, create, deps) {
  {
    !(typeof create === 'function') ? warning$1(false, 'Expected useImperativeHandle() second argument to be a function ' + 'that creates a handle. Instead received: %s.', create !== null ? typeof create : 'null') : void 0;
  } // TODO: If deps are provided, should we skip comparing the ref itself?


  var effectDeps = deps !== null && deps !== undefined ? deps.concat([ref]) : null;
  return mountEffectImpl(Update, UnmountMutation | MountLayout, imperativeHandleEffect.bind(null, create, ref), effectDeps);
}

function updateImperativeHandle(ref, create, deps) {
  {
    !(typeof create === 'function') ? warning$1(false, 'Expected useImperativeHandle() second argument to be a function ' + 'that creates a handle. Instead received: %s.', create !== null ? typeof create : 'null') : void 0;
  } // TODO: If deps are provided, should we skip comparing the ref itself?


  var effectDeps = deps !== null && deps !== undefined ? deps.concat([ref]) : null;
  return updateEffectImpl(Update, UnmountMutation | MountLayout, imperativeHandleEffect.bind(null, create, ref), effectDeps);
}

function mountDebugValue(value, formatterFn) {// This hook is normally a no-op.
  // The react-debug-hooks package injects its own implementation
  // so that e.g. DevTools can display custom hook values.
}

var updateDebugValue = mountDebugValue;

function mountCallback(callback, deps) {
  var hook = mountWorkInProgressHook();
  var nextDeps = deps === undefined ? null : deps;
  hook.memoizedState = [callback, nextDeps];
  return callback;
}

function updateCallback(callback, deps) {
  var hook = updateWorkInProgressHook();
  var nextDeps = deps === undefined ? null : deps;
  var prevState = hook.memoizedState;

  if (prevState !== null) {
    if (nextDeps !== null) {
      var prevDeps = prevState[1];

      if (areHookInputsEqual(nextDeps, prevDeps)) {
        return prevState[0];
      }
    }
  }

  hook.memoizedState = [callback, nextDeps];
  return callback;
}

function mountMemo(nextCreate, deps) {
  var hook = mountWorkInProgressHook();
  var nextDeps = deps === undefined ? null : deps;
  var nextValue = nextCreate();
  hook.memoizedState = [nextValue, nextDeps];
  return nextValue;
}

function updateMemo(nextCreate, deps) {
  var hook = updateWorkInProgressHook();
  var nextDeps = deps === undefined ? null : deps;
  var prevState = hook.memoizedState;

  if (prevState !== null) {
    // Assume these are defined. If they're not, areHookInputsEqual will warn.
    if (nextDeps !== null) {
      var prevDeps = prevState[1];

      if (areHookInputsEqual(nextDeps, prevDeps)) {
        return prevState[0];
      }
    }
  }

  var nextValue = nextCreate();
  hook.memoizedState = [nextValue, nextDeps];
  return nextValue;
}

function mountDeferredValue(value, config) {
  var _mountState = mountState(value),
      prevValue = _mountState[0],
      setValue = _mountState[1];

  mountEffect(function () {
    Scheduler.unstable_next(function () {
      var previousConfig = ReactCurrentBatchConfig$1.suspense;
      ReactCurrentBatchConfig$1.suspense = config === undefined ? null : config;

      try {
        setValue(value);
      } finally {
        ReactCurrentBatchConfig$1.suspense = previousConfig;
      }
    });
  }, [value, config]);
  return prevValue;
}

function updateDeferredValue(value, config) {
  var _updateState = updateState(value),
      prevValue = _updateState[0],
      setValue = _updateState[1];

  updateEffect(function () {
    Scheduler.unstable_next(function () {
      var previousConfig = ReactCurrentBatchConfig$1.suspense;
      ReactCurrentBatchConfig$1.suspense = config === undefined ? null : config;

      try {
        setValue(value);
      } finally {
        ReactCurrentBatchConfig$1.suspense = previousConfig;
      }
    });
  }, [value, config]);
  return prevValue;
}

function mountTransition(config) {
  var _mountState2 = mountState(false),
      isPending = _mountState2[0],
      setPending = _mountState2[1];

  var startTransition = mountCallback(function (callback) {
    setPending(true);
    Scheduler.unstable_next(function () {
      var previousConfig = ReactCurrentBatchConfig$1.suspense;
      ReactCurrentBatchConfig$1.suspense = config === undefined ? null : config;

      try {
        setPending(false);
        callback();
      } finally {
        ReactCurrentBatchConfig$1.suspense = previousConfig;
      }
    });
  }, [config, isPending]);
  return [startTransition, isPending];
}

function updateTransition(config) {
  var _updateState2 = updateState(false),
      isPending = _updateState2[0],
      setPending = _updateState2[1];

  var startTransition = updateCallback(function (callback) {
    setPending(true);
    Scheduler.unstable_next(function () {
      var previousConfig = ReactCurrentBatchConfig$1.suspense;
      ReactCurrentBatchConfig$1.suspense = config === undefined ? null : config;

      try {
        setPending(false);
        callback();
      } finally {
        ReactCurrentBatchConfig$1.suspense = previousConfig;
      }
    });
  }, [config, isPending]);
  return [startTransition, isPending];
}

function dispatchAction(fiber, queue, action) {
  if (!(numberOfReRenders < RE_RENDER_LIMIT)) {
    {
      throw Error("Too many re-renders. React limits the number of renders to prevent an infinite loop.");
    }
  }

  {
    !(typeof arguments[3] !== 'function') ? warning$1(false, "State updates from the useState() and useReducer() Hooks don't support the " + 'second callback argument. To execute a side effect after ' + 'rendering, declare it in the component body with useEffect().') : void 0;
  }

  var alternate = fiber.alternate;

  if (fiber === currentlyRenderingFiber$1 || alternate !== null && alternate === currentlyRenderingFiber$1) {
    // This is a render phase update. Stash it in a lazily-created map of
    // queue -> linked list of updates. After this render pass, we'll restart
    // and apply the stashed updates on top of the work-in-progress hook.
    didScheduleRenderPhaseUpdate = true;
    var update = {
      expirationTime: renderExpirationTime$1,
      suspenseConfig: null,
      action: action,
      eagerReducer: null,
      eagerState: null,
      next: null
    };

    {
      update.priority = getCurrentPriorityLevel();
    }

    if (renderPhaseUpdates === null) {
      renderPhaseUpdates = new Map();
    }

    var firstRenderPhaseUpdate = renderPhaseUpdates.get(queue);

    if (firstRenderPhaseUpdate === undefined) {
      renderPhaseUpdates.set(queue, update);
    } else {
      // Append the update to the end of the list.
      var lastRenderPhaseUpdate = firstRenderPhaseUpdate;

      while (lastRenderPhaseUpdate.next !== null) {
        lastRenderPhaseUpdate = lastRenderPhaseUpdate.next;
      }

      lastRenderPhaseUpdate.next = update;
    }
  } else {
    var currentTime = requestCurrentTimeForUpdate();
    var suspenseConfig = requestCurrentSuspenseConfig();
    var expirationTime = computeExpirationForFiber(currentTime, fiber, suspenseConfig);
    var _update2 = {
      expirationTime: expirationTime,
      suspenseConfig: suspenseConfig,
      action: action,
      eagerReducer: null,
      eagerState: null,
      next: null
    };

    {
      _update2.priority = getCurrentPriorityLevel();
    } // Append the update to the end of the list.


    var last = queue.last;

    if (last === null) {
      // This is the first update. Create a circular list.
      _update2.next = _update2;
    } else {
      var first = last.next;

      if (first !== null) {
        // Still circular.
        _update2.next = first;
      }

      last.next = _update2;
    }

    queue.last = _update2;

    if (fiber.expirationTime === NoWork && (alternate === null || alternate.expirationTime === NoWork)) {
      // The queue is currently empty, which means we can eagerly compute the
      // next state before entering the render phase. If the new state is the
      // same as the current state, we may be able to bail out entirely.
      var lastRenderedReducer = queue.lastRenderedReducer;

      if (lastRenderedReducer !== null) {
        var prevDispatcher;

        {
          prevDispatcher = ReactCurrentDispatcher$1.current;
          ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;
        }

        try {
          var currentState = queue.lastRenderedState;
          var eagerState = lastRenderedReducer(currentState, action); // Stash the eagerly computed state, and the reducer used to compute
          // it, on the update object. If the reducer hasn't changed by the
          // time we enter the render phase, then the eager state can be used
          // without calling the reducer again.

          _update2.eagerReducer = lastRenderedReducer;
          _update2.eagerState = eagerState;

          if (is$1(eagerState, currentState)) {
            // Fast path. We can bail out without scheduling React to re-render.
            // It's still possible that we'll need to rebase this update later,
            // if the component re-renders for a different reason and by that
            // time the reducer has changed.
            return;
          }
        } catch (error) {// Suppress the error. It will throw again in the render phase.
        } finally {
          {
            ReactCurrentDispatcher$1.current = prevDispatcher;
          }
        }
      }
    }

    {
      // $FlowExpectedError - jest isn't a global, and isn't recognized outside of tests
      if ('undefined' !== typeof jest) {
        warnIfNotScopedWithMatchingAct(fiber);
        warnIfNotCurrentlyActingUpdatesInDev(fiber);
      }
    }

    scheduleWork(fiber, expirationTime);
  }
}

var ContextOnlyDispatcher = {
  readContext: readContext,
  useCallback: throwInvalidHookError,
  useContext: throwInvalidHookError,
  useEffect: throwInvalidHookError,
  useImperativeHandle: throwInvalidHookError,
  useLayoutEffect: throwInvalidHookError,
  useMemo: throwInvalidHookError,
  useReducer: throwInvalidHookError,
  useRef: throwInvalidHookError,
  useState: throwInvalidHookError,
  useDebugValue: throwInvalidHookError,
  useResponder: throwInvalidHookError,
  useDeferredValue: throwInvalidHookError,
  useTransition: throwInvalidHookError
};
var HooksDispatcherOnMountInDEV = null;
var HooksDispatcherOnMountWithHookTypesInDEV = null;
var HooksDispatcherOnUpdateInDEV = null;
var InvalidNestedHooksDispatcherOnMountInDEV = null;
var InvalidNestedHooksDispatcherOnUpdateInDEV = null;

{
  var warnInvalidContextAccess = function () {
    warning$1(false, 'Context can only be read while React is rendering. ' + 'In classes, you can read it in the render method or getDerivedStateFromProps. ' + 'In function components, you can read it directly in the function body, but not ' + 'inside Hooks like useReducer() or useMemo().');
  };

  var warnInvalidHookAccess = function () {
    warning$1(false, 'Do not call Hooks inside useEffect(...), useMemo(...), or other built-in Hooks. ' + 'You can only call Hooks at the top level of your React function. ' + 'For more information, see ' + 'https://fb.me/rules-of-hooks');
  };

  HooksDispatcherOnMountInDEV = {
    readContext: function (context, observedBits) {
      return readContext(context, observedBits);
    },
    useCallback: function (callback, deps) {
      currentHookNameInDev = 'useCallback';
      mountHookTypesDev();
      checkDepsAreArrayDev(deps);
      return mountCallback(callback, deps);
    },
    useContext: function (context, observedBits) {
      currentHookNameInDev = 'useContext';
      mountHookTypesDev();
      return readContext(context, observedBits);
    },
    useEffect: function (create, deps) {
      currentHookNameInDev = 'useEffect';
      mountHookTypesDev();
      checkDepsAreArrayDev(deps);
      return mountEffect(create, deps);
    },
    useImperativeHandle: function (ref, create, deps) {
      currentHookNameInDev = 'useImperativeHandle';
      mountHookTypesDev();
      checkDepsAreArrayDev(deps);
      return mountImperativeHandle(ref, create, deps);
    },
    useLayoutEffect: function (create, deps) {
      currentHookNameInDev = 'useLayoutEffect';
      mountHookTypesDev();
      checkDepsAreArrayDev(deps);
      return mountLayoutEffect(create, deps);
    },
    useMemo: function (create, deps) {
      currentHookNameInDev = 'useMemo';
      mountHookTypesDev();
      checkDepsAreArrayDev(deps);
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;

      try {
        return mountMemo(create, deps);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useReducer: function (reducer, initialArg, init) {
      currentHookNameInDev = 'useReducer';
      mountHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;

      try {
        return mountReducer(reducer, initialArg, init);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useRef: function (initialValue) {
      currentHookNameInDev = 'useRef';
      mountHookTypesDev();
      return mountRef(initialValue);
    },
    useState: function (initialState) {
      currentHookNameInDev = 'useState';
      mountHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;

      try {
        return mountState(initialState);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useDebugValue: function (value, formatterFn) {
      currentHookNameInDev = 'useDebugValue';
      mountHookTypesDev();
      return mountDebugValue(value, formatterFn);
    },
    useResponder: function (responder, props) {
      currentHookNameInDev = 'useResponder';
      mountHookTypesDev();
      return createResponderListener(responder, props);
    },
    useDeferredValue: function (value, config) {
      currentHookNameInDev = 'useDeferredValue';
      mountHookTypesDev();
      return mountDeferredValue(value, config);
    },
    useTransition: function (config) {
      currentHookNameInDev = 'useTransition';
      mountHookTypesDev();
      return mountTransition(config);
    }
  };
  HooksDispatcherOnMountWithHookTypesInDEV = {
    readContext: function (context, observedBits) {
      return readContext(context, observedBits);
    },
    useCallback: function (callback, deps) {
      currentHookNameInDev = 'useCallback';
      updateHookTypesDev();
      return mountCallback(callback, deps);
    },
    useContext: function (context, observedBits) {
      currentHookNameInDev = 'useContext';
      updateHookTypesDev();
      return readContext(context, observedBits);
    },
    useEffect: function (create, deps) {
      currentHookNameInDev = 'useEffect';
      updateHookTypesDev();
      return mountEffect(create, deps);
    },
    useImperativeHandle: function (ref, create, deps) {
      currentHookNameInDev = 'useImperativeHandle';
      updateHookTypesDev();
      return mountImperativeHandle(ref, create, deps);
    },
    useLayoutEffect: function (create, deps) {
      currentHookNameInDev = 'useLayoutEffect';
      updateHookTypesDev();
      return mountLayoutEffect(create, deps);
    },
    useMemo: function (create, deps) {
      currentHookNameInDev = 'useMemo';
      updateHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;

      try {
        return mountMemo(create, deps);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useReducer: function (reducer, initialArg, init) {
      currentHookNameInDev = 'useReducer';
      updateHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;

      try {
        return mountReducer(reducer, initialArg, init);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useRef: function (initialValue) {
      currentHookNameInDev = 'useRef';
      updateHookTypesDev();
      return mountRef(initialValue);
    },
    useState: function (initialState) {
      currentHookNameInDev = 'useState';
      updateHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;

      try {
        return mountState(initialState);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useDebugValue: function (value, formatterFn) {
      currentHookNameInDev = 'useDebugValue';
      updateHookTypesDev();
      return mountDebugValue(value, formatterFn);
    },
    useResponder: function (responder, props) {
      currentHookNameInDev = 'useResponder';
      updateHookTypesDev();
      return createResponderListener(responder, props);
    },
    useDeferredValue: function (value, config) {
      currentHookNameInDev = 'useDeferredValue';
      updateHookTypesDev();
      return mountDeferredValue(value, config);
    },
    useTransition: function (config) {
      currentHookNameInDev = 'useTransition';
      updateHookTypesDev();
      return mountTransition(config);
    }
  };
  HooksDispatcherOnUpdateInDEV = {
    readContext: function (context, observedBits) {
      return readContext(context, observedBits);
    },
    useCallback: function (callback, deps) {
      currentHookNameInDev = 'useCallback';
      updateHookTypesDev();
      return updateCallback(callback, deps);
    },
    useContext: function (context, observedBits) {
      currentHookNameInDev = 'useContext';
      updateHookTypesDev();
      return readContext(context, observedBits);
    },
    useEffect: function (create, deps) {
      currentHookNameInDev = 'useEffect';
      updateHookTypesDev();
      return updateEffect(create, deps);
    },
    useImperativeHandle: function (ref, create, deps) {
      currentHookNameInDev = 'useImperativeHandle';
      updateHookTypesDev();
      return updateImperativeHandle(ref, create, deps);
    },
    useLayoutEffect: function (create, deps) {
      currentHookNameInDev = 'useLayoutEffect';
      updateHookTypesDev();
      return updateLayoutEffect(create, deps);
    },
    useMemo: function (create, deps) {
      currentHookNameInDev = 'useMemo';
      updateHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;

      try {
        return updateMemo(create, deps);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useReducer: function (reducer, initialArg, init) {
      currentHookNameInDev = 'useReducer';
      updateHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;

      try {
        return updateReducer(reducer, initialArg, init);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useRef: function (initialValue) {
      currentHookNameInDev = 'useRef';
      updateHookTypesDev();
      return updateRef(initialValue);
    },
    useState: function (initialState) {
      currentHookNameInDev = 'useState';
      updateHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;

      try {
        return updateState(initialState);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useDebugValue: function (value, formatterFn) {
      currentHookNameInDev = 'useDebugValue';
      updateHookTypesDev();
      return updateDebugValue(value, formatterFn);
    },
    useResponder: function (responder, props) {
      currentHookNameInDev = 'useResponder';
      updateHookTypesDev();
      return createResponderListener(responder, props);
    },
    useDeferredValue: function (value, config) {
      currentHookNameInDev = 'useDeferredValue';
      updateHookTypesDev();
      return updateDeferredValue(value, config);
    },
    useTransition: function (config) {
      currentHookNameInDev = 'useTransition';
      updateHookTypesDev();
      return updateTransition(config);
    }
  };
  InvalidNestedHooksDispatcherOnMountInDEV = {
    readContext: function (context, observedBits) {
      warnInvalidContextAccess();
      return readContext(context, observedBits);
    },
    useCallback: function (callback, deps) {
      currentHookNameInDev = 'useCallback';
      warnInvalidHookAccess();
      mountHookTypesDev();
      return mountCallback(callback, deps);
    },
    useContext: function (context, observedBits) {
      currentHookNameInDev = 'useContext';
      warnInvalidHookAccess();
      mountHookTypesDev();
      return readContext(context, observedBits);
    },
    useEffect: function (create, deps) {
      currentHookNameInDev = 'useEffect';
      warnInvalidHookAccess();
      mountHookTypesDev();
      return mountEffect(create, deps);
    },
    useImperativeHandle: function (ref, create, deps) {
      currentHookNameInDev = 'useImperativeHandle';
      warnInvalidHookAccess();
      mountHookTypesDev();
      return mountImperativeHandle(ref, create, deps);
    },
    useLayoutEffect: function (create, deps) {
      currentHookNameInDev = 'useLayoutEffect';
      warnInvalidHookAccess();
      mountHookTypesDev();
      return mountLayoutEffect(create, deps);
    },
    useMemo: function (create, deps) {
      currentHookNameInDev = 'useMemo';
      warnInvalidHookAccess();
      mountHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;

      try {
        return mountMemo(create, deps);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useReducer: function (reducer, initialArg, init) {
      currentHookNameInDev = 'useReducer';
      warnInvalidHookAccess();
      mountHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;

      try {
        return mountReducer(reducer, initialArg, init);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useRef: function (initialValue) {
      currentHookNameInDev = 'useRef';
      warnInvalidHookAccess();
      mountHookTypesDev();
      return mountRef(initialValue);
    },
    useState: function (initialState) {
      currentHookNameInDev = 'useState';
      warnInvalidHookAccess();
      mountHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnMountInDEV;

      try {
        return mountState(initialState);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useDebugValue: function (value, formatterFn) {
      currentHookNameInDev = 'useDebugValue';
      warnInvalidHookAccess();
      mountHookTypesDev();
      return mountDebugValue(value, formatterFn);
    },
    useResponder: function (responder, props) {
      currentHookNameInDev = 'useResponder';
      warnInvalidHookAccess();
      mountHookTypesDev();
      return createResponderListener(responder, props);
    },
    useDeferredValue: function (value, config) {
      currentHookNameInDev = 'useDeferredValue';
      warnInvalidHookAccess();
      mountHookTypesDev();
      return mountDeferredValue(value, config);
    },
    useTransition: function (config) {
      currentHookNameInDev = 'useTransition';
      warnInvalidHookAccess();
      mountHookTypesDev();
      return mountTransition(config);
    }
  };
  InvalidNestedHooksDispatcherOnUpdateInDEV = {
    readContext: function (context, observedBits) {
      warnInvalidContextAccess();
      return readContext(context, observedBits);
    },
    useCallback: function (callback, deps) {
      currentHookNameInDev = 'useCallback';
      warnInvalidHookAccess();
      updateHookTypesDev();
      return updateCallback(callback, deps);
    },
    useContext: function (context, observedBits) {
      currentHookNameInDev = 'useContext';
      warnInvalidHookAccess();
      updateHookTypesDev();
      return readContext(context, observedBits);
    },
    useEffect: function (create, deps) {
      currentHookNameInDev = 'useEffect';
      warnInvalidHookAccess();
      updateHookTypesDev();
      return updateEffect(create, deps);
    },
    useImperativeHandle: function (ref, create, deps) {
      currentHookNameInDev = 'useImperativeHandle';
      warnInvalidHookAccess();
      updateHookTypesDev();
      return updateImperativeHandle(ref, create, deps);
    },
    useLayoutEffect: function (create, deps) {
      currentHookNameInDev = 'useLayoutEffect';
      warnInvalidHookAccess();
      updateHookTypesDev();
      return updateLayoutEffect(create, deps);
    },
    useMemo: function (create, deps) {
      currentHookNameInDev = 'useMemo';
      warnInvalidHookAccess();
      updateHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;

      try {
        return updateMemo(create, deps);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useReducer: function (reducer, initialArg, init) {
      currentHookNameInDev = 'useReducer';
      warnInvalidHookAccess();
      updateHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;

      try {
        return updateReducer(reducer, initialArg, init);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useRef: function (initialValue) {
      currentHookNameInDev = 'useRef';
      warnInvalidHookAccess();
      updateHookTypesDev();
      return updateRef(initialValue);
    },
    useState: function (initialState) {
      currentHookNameInDev = 'useState';
      warnInvalidHookAccess();
      updateHookTypesDev();
      var prevDispatcher = ReactCurrentDispatcher$1.current;
      ReactCurrentDispatcher$1.current = InvalidNestedHooksDispatcherOnUpdateInDEV;

      try {
        return updateState(initialState);
      } finally {
        ReactCurrentDispatcher$1.current = prevDispatcher;
      }
    },
    useDebugValue: function (value, formatterFn) {
      currentHookNameInDev = 'useDebugValue';
      warnInvalidHookAccess();
      updateHookTypesDev();
      return updateDebugValue(value, formatterFn);
    },
    useResponder: function (responder, props) {
      currentHookNameInDev = 'useResponder';
      warnInvalidHookAccess();
      updateHookTypesDev();
      return createResponderListener(responder, props);
    },
    useDeferredValue: function (value, config) {
      currentHookNameInDev = 'useDeferredValue';
      warnInvalidHookAccess();
      updateHookTypesDev();
      return updateDeferredValue(value, config);
    },
    useTransition: function (config) {
      currentHookNameInDev = 'useTransition';
      warnInvalidHookAccess();
      updateHookTypesDev();
      return updateTransition(config);
    }
  };
}

// CommonJS interop named imports.

var now$1 = Scheduler.unstable_now;
var commitTime = 0;
var profilerStartTime = -1;

function getCommitTime() {
  return commitTime;
}

function recordCommitTime() {
  if (!enableProfilerTimer) {
    return;
  }

  commitTime = now$1();
}

function startProfilerTimer(fiber) {
  if (!enableProfilerTimer) {
    return;
  }

  profilerStartTime = now$1();

  if (fiber.actualStartTime < 0) {
    fiber.actualStartTime = now$1();
  }
}

function stopProfilerTimerIfRunning(fiber) {
  if (!enableProfilerTimer) {
    return;
  }

  profilerStartTime = -1;
}

function stopProfilerTimerIfRunningAndRecordDelta(fiber, overrideBaseTime) {
  if (!enableProfilerTimer) {
    return;
  }

  if (profilerStartTime >= 0) {
    var elapsedTime = now$1() - profilerStartTime;
    fiber.actualDuration += elapsedTime;

    if (overrideBaseTime) {
      fiber.selfBaseDuration = elapsedTime;
    }

    profilerStartTime = -1;
  }
}

// This may have been an insertion or a hydration.

var hydrationParentFiber = null;
var nextHydratableInstance = null;
var isHydrating = false;

function warnIfHydrating() {
  {
    !!isHydrating ? warning$1(false, 'We should not be hydrating here. This is a bug in React. Please file a bug.') : void 0;
  }
}

function enterHydrationState(fiber) {
  if (!supportsHydration) {
    return false;
  }

  var parentInstance = fiber.stateNode.containerInfo;
  nextHydratableInstance = getFirstHydratableChild(parentInstance);
  hydrationParentFiber = fiber;
  isHydrating = true;
  return true;
}

function reenterHydrationStateFromDehydratedSuspenseInstance(fiber, suspenseInstance) {
  if (!supportsHydration) {
    return false;
  }

  nextHydratableInstance = getNextHydratableSibling(suspenseInstance);
  popToNextHostParent(fiber);
  isHydrating = true;
  return true;
}

function deleteHydratableInstance(returnFiber, instance) {
  {
    switch (returnFiber.tag) {
      case HostRoot:
        didNotHydrateContainerInstance(returnFiber.stateNode.containerInfo, instance);
        break;

      case HostComponent:
        didNotHydrateInstance(returnFiber.type, returnFiber.memoizedProps, returnFiber.stateNode, instance);
        break;
    }
  }

  var childToDelete = createFiberFromHostInstanceForDeletion();
  childToDelete.stateNode = instance;
  childToDelete.return = returnFiber;
  childToDelete.effectTag = Deletion; // This might seem like it belongs on progressedFirstDeletion. However,
  // these children are not part of the reconciliation list of children.
  // Even if we abort and rereconcile the children, that will try to hydrate
  // again and the nodes are still in the host tree so these will be
  // recreated.

  if (returnFiber.lastEffect !== null) {
    returnFiber.lastEffect.nextEffect = childToDelete;
    returnFiber.lastEffect = childToDelete;
  } else {
    returnFiber.firstEffect = returnFiber.lastEffect = childToDelete;
  }
}

function insertNonHydratedInstance(returnFiber, fiber) {
  fiber.effectTag = fiber.effectTag & ~Hydrating | Placement;

  {
    switch (returnFiber.tag) {
      case HostRoot:
        {
          var parentContainer = returnFiber.stateNode.containerInfo;

          switch (fiber.tag) {
            case HostComponent:
              var type = fiber.type;
              var props = fiber.pendingProps;
              didNotFindHydratableContainerInstance(parentContainer, type, props);
              break;

            case HostText:
              var text = fiber.pendingProps;
              didNotFindHydratableContainerTextInstance(parentContainer, text);
              break;

            case SuspenseComponent:
              
              break;
          }

          break;
        }

      case HostComponent:
        {
          var parentType = returnFiber.type;
          var parentProps = returnFiber.memoizedProps;
          var parentInstance = returnFiber.stateNode;

          switch (fiber.tag) {
            case HostComponent:
              var _type = fiber.type;
              var _props = fiber.pendingProps;
              didNotFindHydratableInstance(parentType, parentProps, parentInstance, _type, _props);
              break;

            case HostText:
              var _text = fiber.pendingProps;
              didNotFindHydratableTextInstance(parentType, parentProps, parentInstance, _text);
              break;

            case SuspenseComponent:
              didNotFindHydratableSuspenseInstance(parentType, parentProps, parentInstance);
              break;
          }

          break;
        }

      default:
        return;
    }
  }
}

function tryHydrate(fiber, nextInstance) {
  switch (fiber.tag) {
    case HostComponent:
      {
        var type = fiber.type;
        var props = fiber.pendingProps;
        var instance = canHydrateInstance(nextInstance, type, props);

        if (instance !== null) {
          fiber.stateNode = instance;
          return true;
        }

        return false;
      }

    case HostText:
      {
        var text = fiber.pendingProps;
        var textInstance = canHydrateTextInstance(nextInstance, text);

        if (textInstance !== null) {
          fiber.stateNode = textInstance;
          return true;
        }

        return false;
      }

    case SuspenseComponent:
      {
        if (enableSuspenseServerRenderer) {
          var suspenseInstance = canHydrateSuspenseInstance(nextInstance);

          if (suspenseInstance !== null) {
            var suspenseState = {
              dehydrated: suspenseInstance,
              retryTime: Never
            };
            fiber.memoizedState = suspenseState; // Store the dehydrated fragment as a child fiber.
            // This simplifies the code for getHostSibling and deleting nodes,
            // since it doesn't have to consider all Suspense boundaries and
            // check if they're dehydrated ones or not.

            var dehydratedFragment = createFiberFromDehydratedFragment(suspenseInstance);
            dehydratedFragment.return = fiber;
            fiber.child = dehydratedFragment;
            return true;
          }
        }

        return false;
      }

    default:
      return false;
  }
}

function tryToClaimNextHydratableInstance(fiber) {
  if (!isHydrating) {
    return;
  }

  var nextInstance = nextHydratableInstance;

  if (!nextInstance) {
    // Nothing to hydrate. Make it an insertion.
    insertNonHydratedInstance(hydrationParentFiber, fiber);
    isHydrating = false;
    hydrationParentFiber = fiber;
    return;
  }

  var firstAttemptedInstance = nextInstance;

  if (!tryHydrate(fiber, nextInstance)) {
    // If we can't hydrate this instance let's try the next one.
    // We use this as a heuristic. It's based on intuition and not data so it
    // might be flawed or unnecessary.
    nextInstance = getNextHydratableSibling(firstAttemptedInstance);

    if (!nextInstance || !tryHydrate(fiber, nextInstance)) {
      // Nothing to hydrate. Make it an insertion.
      insertNonHydratedInstance(hydrationParentFiber, fiber);
      isHydrating = false;
      hydrationParentFiber = fiber;
      return;
    } // We matched the next one, we'll now assume that the first one was
    // superfluous and we'll delete it. Since we can't eagerly delete it
    // we'll have to schedule a deletion. To do that, this node needs a dummy
    // fiber associated with it.


    deleteHydratableInstance(hydrationParentFiber, firstAttemptedInstance);
  }

  hydrationParentFiber = fiber;
  nextHydratableInstance = getFirstHydratableChild(nextInstance);
}

function prepareToHydrateHostInstance(fiber, rootContainerInstance, hostContext) {
  if (!supportsHydration) {
    {
      {
        throw Error("Expected prepareToHydrateHostInstance() to never be called. This error is likely caused by a bug in React. Please file an issue.");
      }
    }
  }

  var instance = fiber.stateNode;
  var updatePayload = hydrateInstance(instance, fiber.type, fiber.memoizedProps, rootContainerInstance, hostContext, fiber); // TODO: Type this specific to this type of component.

  fiber.updateQueue = updatePayload; // If the update payload indicates that there is a change or if there
  // is a new ref we mark this as an update.

  if (updatePayload !== null) {
    return true;
  }

  return false;
}

function prepareToHydrateHostTextInstance(fiber) {
  if (!supportsHydration) {
    {
      {
        throw Error("Expected prepareToHydrateHostTextInstance() to never be called. This error is likely caused by a bug in React. Please file an issue.");
      }
    }
  }

  var textInstance = fiber.stateNode;
  var textContent = fiber.memoizedProps;
  var shouldUpdate = hydrateTextInstance(textInstance, textContent, fiber);

  {
    if (shouldUpdate) {
      // We assume that prepareToHydrateHostTextInstance is called in a context where the
      // hydration parent is the parent host component of this host text.
      var returnFiber = hydrationParentFiber;

      if (returnFiber !== null) {
        switch (returnFiber.tag) {
          case HostRoot:
            {
              var parentContainer = returnFiber.stateNode.containerInfo;
              didNotMatchHydratedContainerTextInstance(parentContainer, textInstance, textContent);
              break;
            }

          case HostComponent:
            {
              var parentType = returnFiber.type;
              var parentProps = returnFiber.memoizedProps;
              var parentInstance = returnFiber.stateNode;
              didNotMatchHydratedTextInstance(parentType, parentProps, parentInstance, textInstance, textContent);
              break;
            }
        }
      }
    }
  }

  return shouldUpdate;
}

function prepareToHydrateHostSuspenseInstance(fiber) {
  if (!supportsHydration) {
    {
      {
        throw Error("Expected prepareToHydrateHostSuspenseInstance() to never be called. This error is likely caused by a bug in React. Please file an issue.");
      }
    }
  }

  var suspenseState = fiber.memoizedState;
  var suspenseInstance = suspenseState !== null ? suspenseState.dehydrated : null;

  if (!suspenseInstance) {
    {
      throw Error("Expected to have a hydrated suspense instance. This error is likely caused by a bug in React. Please file an issue.");
    }
  }

  hydrateSuspenseInstance(suspenseInstance, fiber);
}

function skipPastDehydratedSuspenseInstance(fiber) {
  if (!supportsHydration) {
    {
      {
        throw Error("Expected skipPastDehydratedSuspenseInstance() to never be called. This error is likely caused by a bug in React. Please file an issue.");
      }
    }
  }

  var suspenseState = fiber.memoizedState;
  var suspenseInstance = suspenseState !== null ? suspenseState.dehydrated : null;

  if (!suspenseInstance) {
    {
      throw Error("Expected to have a hydrated suspense instance. This error is likely caused by a bug in React. Please file an issue.");
    }
  }

  return getNextHydratableInstanceAfterSuspenseInstance(suspenseInstance);
}

function popToNextHostParent(fiber) {
  var parent = fiber.return;

  while (parent !== null && parent.tag !== HostComponent && parent.tag !== HostRoot && parent.tag !== SuspenseComponent) {
    parent = parent.return;
  }

  hydrationParentFiber = parent;
}

function popHydrationState(fiber) {
  if (!supportsHydration) {
    return false;
  }

  if (fiber !== hydrationParentFiber) {
    // We're deeper than the current hydration context, inside an inserted
    // tree.
    return false;
  }

  if (!isHydrating) {
    // If we're not currently hydrating but we're in a hydration context, then
    // we were an insertion and now need to pop up reenter hydration of our
    // siblings.
    popToNextHostParent(fiber);
    isHydrating = true;
    return false;
  }

  var type = fiber.type; // If we have any remaining hydratable nodes, we need to delete them now.
  // We only do this deeper than head and body since they tend to have random
  // other nodes in them. We also ignore components with pure text content in
  // side of them.
  // TODO: Better heuristic.

  if (fiber.tag !== HostComponent || type !== 'head' && type !== 'body' && !shouldSetTextContent(type, fiber.memoizedProps)) {
    var nextInstance = nextHydratableInstance;

    while (nextInstance) {
      deleteHydratableInstance(fiber, nextInstance);
      nextInstance = getNextHydratableSibling(nextInstance);
    }
  }

  popToNextHostParent(fiber);

  if (fiber.tag === SuspenseComponent) {
    nextHydratableInstance = skipPastDehydratedSuspenseInstance(fiber);
  } else {
    nextHydratableInstance = hydrationParentFiber ? getNextHydratableSibling(fiber.stateNode) : null;
  }

  return true;
}

function resetHydrationState() {
  if (!supportsHydration) {
    return;
  }

  hydrationParentFiber = null;
  nextHydratableInstance = null;
  isHydrating = false;
}

var ReactCurrentOwner$3 = ReactSharedInternals.ReactCurrentOwner;
var didReceiveUpdate = false;
var didWarnAboutBadClass;
var didWarnAboutModulePatternComponent;
var didWarnAboutContextTypeOnFunctionComponent;
var didWarnAboutGetDerivedStateOnFunctionComponent;
var didWarnAboutFunctionRefs;
var didWarnAboutReassigningProps;
var didWarnAboutMaxDuration;
var didWarnAboutRevealOrder;
var didWarnAboutTailOptions;
var didWarnAboutDefaultPropsOnFunctionComponent;

{
  didWarnAboutBadClass = {};
  didWarnAboutModulePatternComponent = {};
  didWarnAboutContextTypeOnFunctionComponent = {};
  didWarnAboutGetDerivedStateOnFunctionComponent = {};
  didWarnAboutFunctionRefs = {};
  didWarnAboutReassigningProps = false;
  didWarnAboutMaxDuration = false;
  didWarnAboutRevealOrder = {};
  didWarnAboutTailOptions = {};
  didWarnAboutDefaultPropsOnFunctionComponent = {};
}

function reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime) {
  if (current$$1 === null) {
    // If this is a fresh new component that hasn't been rendered yet, we
    // won't update its child set by applying minimal side-effects. Instead,
    // we will add them all to the child before it gets rendered. That means
    // we can optimize this reconciliation pass by not tracking side-effects.
    workInProgress.child = mountChildFibers(workInProgress, null, nextChildren, renderExpirationTime);
  } else {
    // If the current child is the same as the work in progress, it means that
    // we haven't yet started any work on these children. Therefore, we use
    // the clone algorithm to create a copy of all the current children.
    // If we had any progressed work already, that is invalid at this point so
    // let's throw it out.
    workInProgress.child = reconcileChildFibers(workInProgress, current$$1.child, nextChildren, renderExpirationTime);
  }
}

function forceUnmountCurrentAndReconcile(current$$1, workInProgress, nextChildren, renderExpirationTime) {
  // This function is fork of reconcileChildren. It's used in cases where we
  // want to reconcile without matching against the existing set. This has the
  // effect of all current children being unmounted; even if the type and key
  // are the same, the old child is unmounted and a new child is created.
  //
  // To do this, we're going to go through the reconcile algorithm twice. In
  // the first pass, we schedule a deletion for all the current children by
  // passing null.
  workInProgress.child = reconcileChildFibers(workInProgress, current$$1.child, null, renderExpirationTime); // In the second pass, we mount the new children. The trick here is that we
  // pass null in place of where we usually pass the current child set. This has
  // the effect of remounting all children regardless of whether their their
  // identity matches.

  workInProgress.child = reconcileChildFibers(workInProgress, null, nextChildren, renderExpirationTime);
}

function updateForwardRef(current$$1, workInProgress, Component, nextProps, renderExpirationTime) {
  // TODO: current can be non-null here even if the component
  // hasn't yet mounted. This happens after the first render suspends.
  // We'll need to figure out if this is fine or can cause issues.
  {
    if (workInProgress.type !== workInProgress.elementType) {
      // Lazy component props can't be validated in createElement
      // because they're only guaranteed to be resolved here.
      var innerPropTypes = Component.propTypes;

      if (innerPropTypes) {
        checkPropTypes(innerPropTypes, nextProps, // Resolved props
        'prop', getComponentName(Component), getCurrentFiberStackInDev);
      }
    }
  }

  var render = Component.render;
  var ref = workInProgress.ref; // The rest is a fork of updateFunctionComponent

  var nextChildren;
  prepareToReadContext(workInProgress, renderExpirationTime);

  {
    ReactCurrentOwner$3.current = workInProgress;
    setCurrentPhase('render');
    nextChildren = renderWithHooks(current$$1, workInProgress, render, nextProps, ref, renderExpirationTime);

    if (debugRenderPhaseSideEffects || debugRenderPhaseSideEffectsForStrictMode && workInProgress.mode & StrictMode) {
      // Only double-render components with Hooks
      if (workInProgress.memoizedState !== null) {
        nextChildren = renderWithHooks(current$$1, workInProgress, render, nextProps, ref, renderExpirationTime);
      }
    }

    setCurrentPhase(null);
  }

  if (current$$1 !== null && !didReceiveUpdate) {
    bailoutHooks(current$$1, workInProgress, renderExpirationTime);
    return bailoutOnAlreadyFinishedWork(current$$1, workInProgress, renderExpirationTime);
  } // React DevTools reads this flag.


  workInProgress.effectTag |= PerformedWork;
  reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  return workInProgress.child;
}

function updateMemoComponent(current$$1, workInProgress, Component, nextProps, updateExpirationTime, renderExpirationTime) {
  if (current$$1 === null) {
    var type = Component.type;

    if (isSimpleFunctionComponent(type) && Component.compare === null && // SimpleMemoComponent codepath doesn't resolve outer props either.
    Component.defaultProps === undefined) {
      var resolvedType = type;

      {
        resolvedType = resolveFunctionForHotReloading(type);
      } // If this is a plain function component without default props,
      // and with only the default shallow comparison, we upgrade it
      // to a SimpleMemoComponent to allow fast path updates.


      workInProgress.tag = SimpleMemoComponent;
      workInProgress.type = resolvedType;

      {
        validateFunctionComponentInDev(workInProgress, type);
      }

      return updateSimpleMemoComponent(current$$1, workInProgress, resolvedType, nextProps, updateExpirationTime, renderExpirationTime);
    }

    {
      var innerPropTypes = type.propTypes;

      if (innerPropTypes) {
        // Inner memo component props aren't currently validated in createElement.
        // We could move it there, but we'd still need this for lazy code path.
        checkPropTypes(innerPropTypes, nextProps, // Resolved props
        'prop', getComponentName(type), getCurrentFiberStackInDev);
      }
    }

    var child = createFiberFromTypeAndProps(Component.type, null, nextProps, null, workInProgress.mode, renderExpirationTime);
    child.ref = workInProgress.ref;
    child.return = workInProgress;
    workInProgress.child = child;
    return child;
  }

  {
    var _type = Component.type;
    var _innerPropTypes = _type.propTypes;

    if (_innerPropTypes) {
      // Inner memo component props aren't currently validated in createElement.
      // We could move it there, but we'd still need this for lazy code path.
      checkPropTypes(_innerPropTypes, nextProps, // Resolved props
      'prop', getComponentName(_type), getCurrentFiberStackInDev);
    }
  }

  var currentChild = current$$1.child; // This is always exactly one child

  if (updateExpirationTime < renderExpirationTime) {
    // This will be the props with resolved defaultProps,
    // unlike current.memoizedProps which will be the unresolved ones.
    var prevProps = currentChild.memoizedProps; // Default to shallow comparison

    var compare = Component.compare;
    compare = compare !== null ? compare : shallowEqual;

    if (compare(prevProps, nextProps) && current$$1.ref === workInProgress.ref) {
      return bailoutOnAlreadyFinishedWork(current$$1, workInProgress, renderExpirationTime);
    }
  } // React DevTools reads this flag.


  workInProgress.effectTag |= PerformedWork;
  var newChild = createWorkInProgress(currentChild, nextProps, renderExpirationTime);
  newChild.ref = workInProgress.ref;
  newChild.return = workInProgress;
  workInProgress.child = newChild;
  return newChild;
}

function updateSimpleMemoComponent(current$$1, workInProgress, Component, nextProps, updateExpirationTime, renderExpirationTime) {
  // TODO: current can be non-null here even if the component
  // hasn't yet mounted. This happens when the inner render suspends.
  // We'll need to figure out if this is fine or can cause issues.
  {
    if (workInProgress.type !== workInProgress.elementType) {
      // Lazy component props can't be validated in createElement
      // because they're only guaranteed to be resolved here.
      var outerMemoType = workInProgress.elementType;

      if (outerMemoType.$$typeof === REACT_LAZY_TYPE) {
        // We warn when you define propTypes on lazy()
        // so let's just skip over it to find memo() outer wrapper.
        // Inner props for memo are validated later.
        outerMemoType = refineResolvedLazyComponent(outerMemoType);
      }

      var outerPropTypes = outerMemoType && outerMemoType.propTypes;

      if (outerPropTypes) {
        checkPropTypes(outerPropTypes, nextProps, // Resolved (SimpleMemoComponent has no defaultProps)
        'prop', getComponentName(outerMemoType), getCurrentFiberStackInDev);
      } // Inner propTypes will be validated in the function component path.

    }
  }

  if (current$$1 !== null) {
    var prevProps = current$$1.memoizedProps;

    if (shallowEqual(prevProps, nextProps) && current$$1.ref === workInProgress.ref && ( // Prevent bailout if the implementation changed due to hot reload:
    workInProgress.type === current$$1.type)) {
      didReceiveUpdate = false;

      if (updateExpirationTime < renderExpirationTime) {
        return bailoutOnAlreadyFinishedWork(current$$1, workInProgress, renderExpirationTime);
      }
    }
  }

  return updateFunctionComponent(current$$1, workInProgress, Component, nextProps, renderExpirationTime);
}

function updateFragment(current$$1, workInProgress, renderExpirationTime) {
  var nextChildren = workInProgress.pendingProps;
  reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  return workInProgress.child;
}

function updateMode(current$$1, workInProgress, renderExpirationTime) {
  var nextChildren = workInProgress.pendingProps.children;
  reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  return workInProgress.child;
}

function updateProfiler(current$$1, workInProgress, renderExpirationTime) {
  if (enableProfilerTimer) {
    workInProgress.effectTag |= Update;
  }

  var nextProps = workInProgress.pendingProps;
  var nextChildren = nextProps.children;
  reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  return workInProgress.child;
}

function markRef(current$$1, workInProgress) {
  var ref = workInProgress.ref;

  if (current$$1 === null && ref !== null || current$$1 !== null && current$$1.ref !== ref) {
    // Schedule a Ref effect
    workInProgress.effectTag |= Ref;
  }
}

function updateFunctionComponent(current$$1, workInProgress, Component, nextProps, renderExpirationTime) {
  {
    if (workInProgress.type !== workInProgress.elementType) {
      // Lazy component props can't be validated in createElement
      // because they're only guaranteed to be resolved here.
      var innerPropTypes = Component.propTypes;

      if (innerPropTypes) {
        checkPropTypes(innerPropTypes, nextProps, // Resolved props
        'prop', getComponentName(Component), getCurrentFiberStackInDev);
      }
    }
  }

  var context;

  if (!disableLegacyContext) {
    var unmaskedContext = getUnmaskedContext(workInProgress, Component, true);
    context = getMaskedContext(workInProgress, unmaskedContext);
  }

  var nextChildren;
  prepareToReadContext(workInProgress, renderExpirationTime);

  {
    ReactCurrentOwner$3.current = workInProgress;
    setCurrentPhase('render');
    nextChildren = renderWithHooks(current$$1, workInProgress, Component, nextProps, context, renderExpirationTime);

    if (debugRenderPhaseSideEffects || debugRenderPhaseSideEffectsForStrictMode && workInProgress.mode & StrictMode) {
      // Only double-render components with Hooks
      if (workInProgress.memoizedState !== null) {
        nextChildren = renderWithHooks(current$$1, workInProgress, Component, nextProps, context, renderExpirationTime);
      }
    }

    setCurrentPhase(null);
  }

  if (current$$1 !== null && !didReceiveUpdate) {
    bailoutHooks(current$$1, workInProgress, renderExpirationTime);
    return bailoutOnAlreadyFinishedWork(current$$1, workInProgress, renderExpirationTime);
  } // React DevTools reads this flag.


  workInProgress.effectTag |= PerformedWork;
  reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  return workInProgress.child;
}

function updateClassComponent(current$$1, workInProgress, Component, nextProps, renderExpirationTime) {
  {
    if (workInProgress.type !== workInProgress.elementType) {
      // Lazy component props can't be validated in createElement
      // because they're only guaranteed to be resolved here.
      var innerPropTypes = Component.propTypes;

      if (innerPropTypes) {
        checkPropTypes(innerPropTypes, nextProps, // Resolved props
        'prop', getComponentName(Component), getCurrentFiberStackInDev);
      }
    }
  } // Push context providers early to prevent context stack mismatches.
  // During mounting we don't know the child context yet as the instance doesn't exist.
  // We will invalidate the child context in finishClassComponent() right after rendering.


  var hasContext;

  if (isContextProvider(Component)) {
    hasContext = true;
    pushContextProvider(workInProgress);
  } else {
    hasContext = false;
  }

  prepareToReadContext(workInProgress, renderExpirationTime);
  var instance = workInProgress.stateNode;
  var shouldUpdate;

  if (instance === null) {
    if (current$$1 !== null) {
      // An class component without an instance only mounts if it suspended
      // inside a non- concurrent tree, in an inconsistent state. We want to
      // tree it like a new mount, even though an empty version of it already
      // committed. Disconnect the alternate pointers.
      current$$1.alternate = null;
      workInProgress.alternate = null; // Since this is conceptually a new fiber, schedule a Placement effect

      workInProgress.effectTag |= Placement;
    } // In the initial pass we might need to construct the instance.


    constructClassInstance(workInProgress, Component, nextProps, renderExpirationTime);
    mountClassInstance(workInProgress, Component, nextProps, renderExpirationTime);
    shouldUpdate = true;
  } else if (current$$1 === null) {
    // In a resume, we'll already have an instance we can reuse.
    shouldUpdate = resumeMountClassInstance(workInProgress, Component, nextProps, renderExpirationTime);
  } else {
    shouldUpdate = updateClassInstance(current$$1, workInProgress, Component, nextProps, renderExpirationTime);
  }

  var nextUnitOfWork = finishClassComponent(current$$1, workInProgress, Component, shouldUpdate, hasContext, renderExpirationTime);

  {
    var inst = workInProgress.stateNode;

    if (inst.props !== nextProps) {
      !didWarnAboutReassigningProps ? warning$1(false, 'It looks like %s is reassigning its own `this.props` while rendering. ' + 'This is not supported and can lead to confusing bugs.', getComponentName(workInProgress.type) || 'a component') : void 0;
      didWarnAboutReassigningProps = true;
    }
  }

  return nextUnitOfWork;
}

function finishClassComponent(current$$1, workInProgress, Component, shouldUpdate, hasContext, renderExpirationTime) {
  // Refs should update even if shouldComponentUpdate returns false
  markRef(current$$1, workInProgress);
  var didCaptureError = (workInProgress.effectTag & DidCapture) !== NoEffect;

  if (!shouldUpdate && !didCaptureError) {
    // Context providers should defer to sCU for rendering
    if (hasContext) {
      invalidateContextProvider(workInProgress, Component, false);
    }

    return bailoutOnAlreadyFinishedWork(current$$1, workInProgress, renderExpirationTime);
  }

  var instance = workInProgress.stateNode; // Rerender

  ReactCurrentOwner$3.current = workInProgress;
  var nextChildren;

  if (didCaptureError && typeof Component.getDerivedStateFromError !== 'function') {
    // If we captured an error, but getDerivedStateFrom catch is not defined,
    // unmount all the children. componentDidCatch will schedule an update to
    // re-render a fallback. This is temporary until we migrate everyone to
    // the new API.
    // TODO: Warn in a future release.
    nextChildren = null;

    if (enableProfilerTimer) {
      stopProfilerTimerIfRunning(workInProgress);
    }
  } else {
    {
      setCurrentPhase('render');
      nextChildren = instance.render();

      if (debugRenderPhaseSideEffects || debugRenderPhaseSideEffectsForStrictMode && workInProgress.mode & StrictMode) {
        instance.render();
      }

      setCurrentPhase(null);
    }
  } // React DevTools reads this flag.


  workInProgress.effectTag |= PerformedWork;

  if (current$$1 !== null && didCaptureError) {
    // If we're recovering from an error, reconcile without reusing any of
    // the existing children. Conceptually, the normal children and the children
    // that are shown on error are two different sets, so we shouldn't reuse
    // normal children even if their identities match.
    forceUnmountCurrentAndReconcile(current$$1, workInProgress, nextChildren, renderExpirationTime);
  } else {
    reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  } // Memoize state using the values we just used to render.
  // TODO: Restructure so we never read values from the instance.


  workInProgress.memoizedState = instance.state; // The context might have changed so we need to recalculate it.

  if (hasContext) {
    invalidateContextProvider(workInProgress, Component, true);
  }

  return workInProgress.child;
}

function pushHostRootContext(workInProgress) {
  var root = workInProgress.stateNode;

  if (root.pendingContext) {
    pushTopLevelContextObject(workInProgress, root.pendingContext, root.pendingContext !== root.context);
  } else if (root.context) {
    // Should always be set
    pushTopLevelContextObject(workInProgress, root.context, false);
  }

  pushHostContainer(workInProgress, root.containerInfo);
}

function updateHostRoot(current$$1, workInProgress, renderExpirationTime) {
  pushHostRootContext(workInProgress);
  var updateQueue = workInProgress.updateQueue;

  if (!(updateQueue !== null)) {
    {
      throw Error("If the root does not have an updateQueue, we should have already bailed out. This error is likely caused by a bug in React. Please file an issue.");
    }
  }

  var nextProps = workInProgress.pendingProps;
  var prevState = workInProgress.memoizedState;
  var prevChildren = prevState !== null ? prevState.element : null;
  processUpdateQueue(workInProgress, updateQueue, nextProps, null, renderExpirationTime);
  var nextState = workInProgress.memoizedState; // Caution: React DevTools currently depends on this property
  // being called "element".

  var nextChildren = nextState.element;

  if (nextChildren === prevChildren) {
    // If the state is the same as before, that's a bailout because we had
    // no work that expires at this time.
    resetHydrationState();
    return bailoutOnAlreadyFinishedWork(current$$1, workInProgress, renderExpirationTime);
  }

  var root = workInProgress.stateNode;

  if (root.hydrate && enterHydrationState(workInProgress)) {
    // If we don't have any current children this might be the first pass.
    // We always try to hydrate. If this isn't a hydration pass there won't
    // be any children to hydrate which is effectively the same thing as
    // not hydrating.
    var child = mountChildFibers(workInProgress, null, nextChildren, renderExpirationTime);
    workInProgress.child = child;
    var node = child;

    while (node) {
      // Mark each child as hydrating. This is a fast path to know whether this
      // tree is part of a hydrating tree. This is used to determine if a child
      // node has fully mounted yet, and for scheduling event replaying.
      // Conceptually this is similar to Placement in that a new subtree is
      // inserted into the React tree here. It just happens to not need DOM
      // mutations because it already exists.
      node.effectTag = node.effectTag & ~Placement | Hydrating;
      node = node.sibling;
    }
  } else {
    // Otherwise reset hydration state in case we aborted and resumed another
    // root.
    reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
    resetHydrationState();
  }

  return workInProgress.child;
}

function updateHostComponent(current$$1, workInProgress, renderExpirationTime) {
  pushHostContext(workInProgress);

  if (current$$1 === null) {
    tryToClaimNextHydratableInstance(workInProgress);
  }

  var type = workInProgress.type;
  var nextProps = workInProgress.pendingProps;
  var prevProps = current$$1 !== null ? current$$1.memoizedProps : null;
  var nextChildren = nextProps.children;
  var isDirectTextChild = shouldSetTextContent(type, nextProps);

  if (isDirectTextChild) {
    // We special case a direct text child of a host node. This is a common
    // case. We won't handle it as a reified child. We will instead handle
    // this in the host environment that also have access to this prop. That
    // avoids allocating another HostText fiber and traversing it.
    nextChildren = null;
  } else if (prevProps !== null && shouldSetTextContent(type, prevProps)) {
    // If we're switching from a direct text child to a normal child, or to
    // empty, we need to schedule the text content to be reset.
    workInProgress.effectTag |= ContentReset;
  }

  markRef(current$$1, workInProgress); // Check the host config to see if the children are offscreen/hidden.

  if (workInProgress.mode & ConcurrentMode && renderExpirationTime !== Never && shouldDeprioritizeSubtree(type, nextProps)) {
    if (enableSchedulerTracing) {
      markSpawnedWork(Never);
    } // Schedule this fiber to re-render at offscreen priority. Then bailout.


    workInProgress.expirationTime = workInProgress.childExpirationTime = Never;
    return null;
  }

  reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  return workInProgress.child;
}

function updateHostText(current$$1, workInProgress) {
  if (current$$1 === null) {
    tryToClaimNextHydratableInstance(workInProgress);
  } // Nothing to do here. This is terminal. We'll do the completion step
  // immediately after.


  return null;
}

function mountLazyComponent(_current, workInProgress, elementType, updateExpirationTime, renderExpirationTime) {
  if (_current !== null) {
    // An lazy component only mounts if it suspended inside a non-
    // concurrent tree, in an inconsistent state. We want to treat it like
    // a new mount, even though an empty version of it already committed.
    // Disconnect the alternate pointers.
    _current.alternate = null;
    workInProgress.alternate = null; // Since this is conceptually a new fiber, schedule a Placement effect

    workInProgress.effectTag |= Placement;
  }

  var props = workInProgress.pendingProps; // We can't start a User Timing measurement with correct label yet.
  // Cancel and resume right after we know the tag.

  cancelWorkTimer(workInProgress);
  var Component = readLazyComponentType(elementType); // Store the unwrapped component in the type.

  workInProgress.type = Component;
  var resolvedTag = workInProgress.tag = resolveLazyComponentTag(Component);
  startWorkTimer(workInProgress);
  var resolvedProps = resolveDefaultProps(Component, props);
  var child;

  switch (resolvedTag) {
    case FunctionComponent:
      {
        {
          validateFunctionComponentInDev(workInProgress, Component);
          workInProgress.type = Component = resolveFunctionForHotReloading(Component);
        }

        child = updateFunctionComponent(null, workInProgress, Component, resolvedProps, renderExpirationTime);
        break;
      }

    case ClassComponent:
      {
        {
          workInProgress.type = Component = resolveClassForHotReloading(Component);
        }

        child = updateClassComponent(null, workInProgress, Component, resolvedProps, renderExpirationTime);
        break;
      }

    case ForwardRef:
      {
        {
          workInProgress.type = Component = resolveForwardRefForHotReloading(Component);
        }

        child = updateForwardRef(null, workInProgress, Component, resolvedProps, renderExpirationTime);
        break;
      }

    case MemoComponent:
      {
        {
          if (workInProgress.type !== workInProgress.elementType) {
            var outerPropTypes = Component.propTypes;

            if (outerPropTypes) {
              checkPropTypes(outerPropTypes, resolvedProps, // Resolved for outer only
              'prop', getComponentName(Component), getCurrentFiberStackInDev);
            }
          }
        }

        child = updateMemoComponent(null, workInProgress, Component, resolveDefaultProps(Component.type, resolvedProps), // The inner type can have defaults too
        updateExpirationTime, renderExpirationTime);
        break;
      }

    default:
      {
        var hint = '';

        {
          if (Component !== null && typeof Component === 'object' && Component.$$typeof === REACT_LAZY_TYPE) {
            hint = ' Did you wrap a component in React.lazy() more than once?';
          }
        } // This message intentionally doesn't mention ForwardRef or MemoComponent
        // because the fact that it's a separate type of work is an
        // implementation detail.


        {
          {
            throw Error("Element type is invalid. Received a promise that resolves to: " + Component + ". Lazy element type must resolve to a class or function." + hint);
          }
        }
      }
  }

  return child;
}

function mountIncompleteClassComponent(_current, workInProgress, Component, nextProps, renderExpirationTime) {
  if (_current !== null) {
    // An incomplete component only mounts if it suspended inside a non-
    // concurrent tree, in an inconsistent state. We want to treat it like
    // a new mount, even though an empty version of it already committed.
    // Disconnect the alternate pointers.
    _current.alternate = null;
    workInProgress.alternate = null; // Since this is conceptually a new fiber, schedule a Placement effect

    workInProgress.effectTag |= Placement;
  } // Promote the fiber to a class and try rendering again.


  workInProgress.tag = ClassComponent; // The rest of this function is a fork of `updateClassComponent`
  // Push context providers early to prevent context stack mismatches.
  // During mounting we don't know the child context yet as the instance doesn't exist.
  // We will invalidate the child context in finishClassComponent() right after rendering.

  var hasContext;

  if (isContextProvider(Component)) {
    hasContext = true;
    pushContextProvider(workInProgress);
  } else {
    hasContext = false;
  }

  prepareToReadContext(workInProgress, renderExpirationTime);
  constructClassInstance(workInProgress, Component, nextProps, renderExpirationTime);
  mountClassInstance(workInProgress, Component, nextProps, renderExpirationTime);
  return finishClassComponent(null, workInProgress, Component, true, hasContext, renderExpirationTime);
}

function mountIndeterminateComponent(_current, workInProgress, Component, renderExpirationTime) {
  if (_current !== null) {
    // An indeterminate component only mounts if it suspended inside a non-
    // concurrent tree, in an inconsistent state. We want to treat it like
    // a new mount, even though an empty version of it already committed.
    // Disconnect the alternate pointers.
    _current.alternate = null;
    workInProgress.alternate = null; // Since this is conceptually a new fiber, schedule a Placement effect

    workInProgress.effectTag |= Placement;
  }

  var props = workInProgress.pendingProps;
  var context;

  if (!disableLegacyContext) {
    var unmaskedContext = getUnmaskedContext(workInProgress, Component, false);
    context = getMaskedContext(workInProgress, unmaskedContext);
  }

  prepareToReadContext(workInProgress, renderExpirationTime);
  var value;

  {
    if (Component.prototype && typeof Component.prototype.render === 'function') {
      var componentName = getComponentName(Component) || 'Unknown';

      if (!didWarnAboutBadClass[componentName]) {
        warningWithoutStack$1(false, "The <%s /> component appears to have a render method, but doesn't extend React.Component. " + 'This is likely to cause errors. Change %s to extend React.Component instead.', componentName, componentName);
        didWarnAboutBadClass[componentName] = true;
      }
    }

    if (workInProgress.mode & StrictMode) {
      ReactStrictModeWarnings.recordLegacyContextWarning(workInProgress, null);
    }

    ReactCurrentOwner$3.current = workInProgress;
    value = renderWithHooks(null, workInProgress, Component, props, context, renderExpirationTime);
  } // React DevTools reads this flag.


  workInProgress.effectTag |= PerformedWork;

  if (typeof value === 'object' && value !== null && typeof value.render === 'function' && value.$$typeof === undefined) {
    {
      var _componentName = getComponentName(Component) || 'Unknown';

      if (!didWarnAboutModulePatternComponent[_componentName]) {
        warningWithoutStack$1(false, 'The <%s /> component appears to be a function component that returns a class instance. ' + 'Change %s to a class that extends React.Component instead. ' + "If you can't use a class try assigning the prototype on the function as a workaround. " + "`%s.prototype = React.Component.prototype`. Don't use an arrow function since it " + 'cannot be called with `new` by React.', _componentName, _componentName, _componentName);
        didWarnAboutModulePatternComponent[_componentName] = true;
      }
    } // Proceed under the assumption that this is a class instance


    workInProgress.tag = ClassComponent; // Throw out any hooks that were used.

    resetHooks(); // Push context providers early to prevent context stack mismatches.
    // During mounting we don't know the child context yet as the instance doesn't exist.
    // We will invalidate the child context in finishClassComponent() right after rendering.

    var hasContext = false;

    if (isContextProvider(Component)) {
      hasContext = true;
      pushContextProvider(workInProgress);
    } else {
      hasContext = false;
    }

    workInProgress.memoizedState = value.state !== null && value.state !== undefined ? value.state : null;
    var getDerivedStateFromProps = Component.getDerivedStateFromProps;

    if (typeof getDerivedStateFromProps === 'function') {
      applyDerivedStateFromProps(workInProgress, Component, getDerivedStateFromProps, props);
    }

    adoptClassInstance(workInProgress, value);
    mountClassInstance(workInProgress, Component, props, renderExpirationTime);
    return finishClassComponent(null, workInProgress, Component, true, hasContext, renderExpirationTime);
  } else {
    // Proceed under the assumption that this is a function component
    workInProgress.tag = FunctionComponent;

    {
      if (disableLegacyContext && Component.contextTypes) {
        warningWithoutStack$1(false, '%s uses the legacy contextTypes API which is no longer supported. ' + 'Use React.createContext() with React.useContext() instead.', getComponentName(Component) || 'Unknown');
      }

      if (debugRenderPhaseSideEffects || debugRenderPhaseSideEffectsForStrictMode && workInProgress.mode & StrictMode) {
        // Only double-render components with Hooks
        if (workInProgress.memoizedState !== null) {
          value = renderWithHooks(null, workInProgress, Component, props, context, renderExpirationTime);
        }
      }
    }

    reconcileChildren(null, workInProgress, value, renderExpirationTime);

    {
      validateFunctionComponentInDev(workInProgress, Component);
    }

    return workInProgress.child;
  }
}

function validateFunctionComponentInDev(workInProgress, Component) {
  if (Component) {
    !!Component.childContextTypes ? warningWithoutStack$1(false, '%s(...): childContextTypes cannot be defined on a function component.', Component.displayName || Component.name || 'Component') : void 0;
  }

  if (workInProgress.ref !== null) {
    var info = '';
    var ownerName = getCurrentFiberOwnerNameInDevOrNull();

    if (ownerName) {
      info += '\n\nCheck the render method of `' + ownerName + '`.';
    }

    var warningKey = ownerName || workInProgress._debugID || '';
    var debugSource = workInProgress._debugSource;

    if (debugSource) {
      warningKey = debugSource.fileName + ':' + debugSource.lineNumber;
    }

    if (!didWarnAboutFunctionRefs[warningKey]) {
      didWarnAboutFunctionRefs[warningKey] = true;
      warning$1(false, 'Function components cannot be given refs. ' + 'Attempts to access this ref will fail. ' + 'Did you mean to use React.forwardRef()?%s', info);
    }
  }

  if (warnAboutDefaultPropsOnFunctionComponents && Component.defaultProps !== undefined) {
    var componentName = getComponentName(Component) || 'Unknown';

    if (!didWarnAboutDefaultPropsOnFunctionComponent[componentName]) {
      warningWithoutStack$1(false, '%s: Support for defaultProps will be removed from function components ' + 'in a future major release. Use JavaScript default parameters instead.', componentName);
      didWarnAboutDefaultPropsOnFunctionComponent[componentName] = true;
    }
  }

  if (typeof Component.getDerivedStateFromProps === 'function') {
    var _componentName2 = getComponentName(Component) || 'Unknown';

    if (!didWarnAboutGetDerivedStateOnFunctionComponent[_componentName2]) {
      warningWithoutStack$1(false, '%s: Function components do not support getDerivedStateFromProps.', _componentName2);
      didWarnAboutGetDerivedStateOnFunctionComponent[_componentName2] = true;
    }
  }

  if (typeof Component.contextType === 'object' && Component.contextType !== null) {
    var _componentName3 = getComponentName(Component) || 'Unknown';

    if (!didWarnAboutContextTypeOnFunctionComponent[_componentName3]) {
      warningWithoutStack$1(false, '%s: Function components do not support contextType.', _componentName3);
      didWarnAboutContextTypeOnFunctionComponent[_componentName3] = true;
    }
  }
}

var SUSPENDED_MARKER = {
  dehydrated: null,
  retryTime: NoWork
};

function shouldRemainOnFallback(suspenseContext, current$$1, workInProgress) {
  // If the context is telling us that we should show a fallback, and we're not
  // already showing content, then we should show the fallback instead.
  return hasSuspenseContext(suspenseContext, ForceSuspenseFallback) && (current$$1 === null || current$$1.memoizedState !== null);
}

function updateSuspenseComponent(current$$1, workInProgress, renderExpirationTime) {
  var mode = workInProgress.mode;
  var nextProps = workInProgress.pendingProps; // This is used by DevTools to force a boundary to suspend.

  {
    if (shouldSuspend(workInProgress)) {
      workInProgress.effectTag |= DidCapture;
    }
  }

  var suspenseContext = suspenseStackCursor.current;
  var nextDidTimeout = false;
  var didSuspend = (workInProgress.effectTag & DidCapture) !== NoEffect;

  if (didSuspend || shouldRemainOnFallback(suspenseContext, current$$1, workInProgress)) {
    // Something in this boundary's subtree already suspended. Switch to
    // rendering the fallback children.
    nextDidTimeout = true;
    workInProgress.effectTag &= ~DidCapture;
  } else {
    // Attempting the main content
    if (current$$1 === null || current$$1.memoizedState !== null) {
      // This is a new mount or this boundary is already showing a fallback state.
      // Mark this subtree context as having at least one invisible parent that could
      // handle the fallback state.
      // Boundaries without fallbacks or should be avoided are not considered since
      // they cannot handle preferred fallback states.
      if (nextProps.fallback !== undefined && nextProps.unstable_avoidThisFallback !== true) {
        suspenseContext = addSubtreeSuspenseContext(suspenseContext, InvisibleParentSuspenseContext);
      }
    }
  }

  suspenseContext = setDefaultShallowSuspenseContext(suspenseContext);
  pushSuspenseContext(workInProgress, suspenseContext);

  {
    if ('maxDuration' in nextProps) {
      if (!didWarnAboutMaxDuration) {
        didWarnAboutMaxDuration = true;
        warning$1(false, 'maxDuration has been removed from React. ' + 'Remove the maxDuration prop.');
      }
    }
  } // This next part is a bit confusing. If the children timeout, we switch to
  // showing the fallback children in place of the "primary" children.
  // However, we don't want to delete the primary children because then their
  // state will be lost (both the React state and the host state, e.g.
  // uncontrolled form inputs). Instead we keep them mounted and hide them.
  // Both the fallback children AND the primary children are rendered at the
  // same time. Once the primary children are un-suspended, we can delete
  // the fallback children — don't need to preserve their state.
  //
  // The two sets of children are siblings in the host environment, but
  // semantically, for purposes of reconciliation, they are two separate sets.
  // So we store them using two fragment fibers.
  //
  // However, we want to avoid allocating extra fibers for every placeholder.
  // They're only necessary when the children time out, because that's the
  // only time when both sets are mounted.
  //
  // So, the extra fragment fibers are only used if the children time out.
  // Otherwise, we render the primary children directly. This requires some
  // custom reconciliation logic to preserve the state of the primary
  // children. It's essentially a very basic form of re-parenting.


  if (current$$1 === null) {
    // If we're currently hydrating, try to hydrate this boundary.
    // But only if this has a fallback.
    if (nextProps.fallback !== undefined) {
      tryToClaimNextHydratableInstance(workInProgress); // This could've been a dehydrated suspense component.

      if (enableSuspenseServerRenderer) {
        var suspenseState = workInProgress.memoizedState;

        if (suspenseState !== null) {
          var dehydrated = suspenseState.dehydrated;

          if (dehydrated !== null) {
            return mountDehydratedSuspenseComponent(workInProgress, dehydrated, renderExpirationTime);
          }
        }
      }
    } // This is the initial mount. This branch is pretty simple because there's
    // no previous state that needs to be preserved.


    if (nextDidTimeout) {
      // Mount separate fragments for primary and fallback children.
      var nextFallbackChildren = nextProps.fallback;
      var primaryChildFragment = createFiberFromFragment(null, mode, NoWork, null);
      primaryChildFragment.return = workInProgress;

      if ((workInProgress.mode & BatchedMode) === NoMode) {
        // Outside of batched mode, we commit the effects from the
        // partially completed, timed-out tree, too.
        var progressedState = workInProgress.memoizedState;
        var progressedPrimaryChild = progressedState !== null ? workInProgress.child.child : workInProgress.child;
        primaryChildFragment.child = progressedPrimaryChild;
        var progressedChild = progressedPrimaryChild;

        while (progressedChild !== null) {
          progressedChild.return = primaryChildFragment;
          progressedChild = progressedChild.sibling;
        }
      }

      var fallbackChildFragment = createFiberFromFragment(nextFallbackChildren, mode, renderExpirationTime, null);
      fallbackChildFragment.return = workInProgress;
      primaryChildFragment.sibling = fallbackChildFragment; // Skip the primary children, and continue working on the
      // fallback children.

      workInProgress.memoizedState = SUSPENDED_MARKER;
      workInProgress.child = primaryChildFragment;
      return fallbackChildFragment;
    } else {
      // Mount the primary children without an intermediate fragment fiber.
      var nextPrimaryChildren = nextProps.children;
      workInProgress.memoizedState = null;
      return workInProgress.child = mountChildFibers(workInProgress, null, nextPrimaryChildren, renderExpirationTime);
    }
  } else {
    // This is an update. This branch is more complicated because we need to
    // ensure the state of the primary children is preserved.
    var prevState = current$$1.memoizedState;

    if (prevState !== null) {
      if (enableSuspenseServerRenderer) {
        var _dehydrated = prevState.dehydrated;

        if (_dehydrated !== null) {
          if (!didSuspend) {
            return updateDehydratedSuspenseComponent(current$$1, workInProgress, _dehydrated, prevState, renderExpirationTime);
          } else if (workInProgress.memoizedState !== null) {
            // Something suspended and we should still be in dehydrated mode.
            // Leave the existing child in place.
            workInProgress.child = current$$1.child; // The dehydrated completion pass expects this flag to be there
            // but the normal suspense pass doesn't.

            workInProgress.effectTag |= DidCapture;
            return null;
          } else {
            // Suspended but we should no longer be in dehydrated mode.
            // Therefore we now have to render the fallback. Wrap the children
            // in a fragment fiber to keep them separate from the fallback
            // children.
            var _nextFallbackChildren = nextProps.fallback;

            var _primaryChildFragment = createFiberFromFragment( // It shouldn't matter what the pending props are because we aren't
            // going to render this fragment.
            null, mode, NoWork, null);

            _primaryChildFragment.return = workInProgress; // This is always null since we never want the previous child
            // that we're not going to hydrate.

            _primaryChildFragment.child = null;

            if ((workInProgress.mode & BatchedMode) === NoMode) {
              // Outside of batched mode, we commit the effects from the
              // partially completed, timed-out tree, too.
              var _progressedChild = _primaryChildFragment.child = workInProgress.child;

              while (_progressedChild !== null) {
                _progressedChild.return = _primaryChildFragment;
                _progressedChild = _progressedChild.sibling;
              }
            } else {
              // We will have dropped the effect list which contains the deletion.
              // We need to reconcile to delete the current child.
              reconcileChildFibers(workInProgress, current$$1.child, null, renderExpirationTime);
            } // Because primaryChildFragment is a new fiber that we're inserting as the
            // parent of a new tree, we need to set its treeBaseDuration.


            if (enableProfilerTimer && workInProgress.mode & ProfileMode) {
              // treeBaseDuration is the sum of all the child tree base durations.
              var treeBaseDuration = 0;
              var hiddenChild = _primaryChildFragment.child;

              while (hiddenChild !== null) {
                treeBaseDuration += hiddenChild.treeBaseDuration;
                hiddenChild = hiddenChild.sibling;
              }

              _primaryChildFragment.treeBaseDuration = treeBaseDuration;
            } // Create a fragment from the fallback children, too.


            var _fallbackChildFragment = createFiberFromFragment(_nextFallbackChildren, mode, renderExpirationTime, null);

            _fallbackChildFragment.return = workInProgress;
            _primaryChildFragment.sibling = _fallbackChildFragment;
            _fallbackChildFragment.effectTag |= Placement;
            _primaryChildFragment.childExpirationTime = NoWork;
            workInProgress.memoizedState = SUSPENDED_MARKER;
            workInProgress.child = _primaryChildFragment; // Skip the primary children, and continue working on the
            // fallback children.

            return _fallbackChildFragment;
          }
        }
      } // The current tree already timed out. That means each child set is
      // wrapped in a fragment fiber.


      var currentPrimaryChildFragment = current$$1.child;
      var currentFallbackChildFragment = currentPrimaryChildFragment.sibling;

      if (nextDidTimeout) {
        // Still timed out. Reuse the current primary children by cloning
        // its fragment. We're going to skip over these entirely.
        var _nextFallbackChildren2 = nextProps.fallback;

        var _primaryChildFragment2 = createWorkInProgress(currentPrimaryChildFragment, currentPrimaryChildFragment.pendingProps, NoWork);

        _primaryChildFragment2.return = workInProgress;

        if ((workInProgress.mode & BatchedMode) === NoMode) {
          // Outside of batched mode, we commit the effects from the
          // partially completed, timed-out tree, too.
          var _progressedState = workInProgress.memoizedState;

          var _progressedPrimaryChild = _progressedState !== null ? workInProgress.child.child : workInProgress.child;

          if (_progressedPrimaryChild !== currentPrimaryChildFragment.child) {
            _primaryChildFragment2.child = _progressedPrimaryChild;
            var _progressedChild2 = _progressedPrimaryChild;

            while (_progressedChild2 !== null) {
              _progressedChild2.return = _primaryChildFragment2;
              _progressedChild2 = _progressedChild2.sibling;
            }
          }
        } // Because primaryChildFragment is a new fiber that we're inserting as the
        // parent of a new tree, we need to set its treeBaseDuration.


        if (enableProfilerTimer && workInProgress.mode & ProfileMode) {
          // treeBaseDuration is the sum of all the child tree base durations.
          var _treeBaseDuration = 0;
          var _hiddenChild = _primaryChildFragment2.child;

          while (_hiddenChild !== null) {
            _treeBaseDuration += _hiddenChild.treeBaseDuration;
            _hiddenChild = _hiddenChild.sibling;
          }

          _primaryChildFragment2.treeBaseDuration = _treeBaseDuration;
        } // Clone the fallback child fragment, too. These we'll continue
        // working on.


        var _fallbackChildFragment2 = createWorkInProgress(currentFallbackChildFragment, _nextFallbackChildren2, currentFallbackChildFragment.expirationTime);

        _fallbackChildFragment2.return = workInProgress;
        _primaryChildFragment2.sibling = _fallbackChildFragment2;
        _primaryChildFragment2.childExpirationTime = NoWork; // Skip the primary children, and continue working on the
        // fallback children.

        workInProgress.memoizedState = SUSPENDED_MARKER;
        workInProgress.child = _primaryChildFragment2;
        return _fallbackChildFragment2;
      } else {
        // No longer suspended. Switch back to showing the primary children,
        // and remove the intermediate fragment fiber.
        var _nextPrimaryChildren = nextProps.children;
        var currentPrimaryChild = currentPrimaryChildFragment.child;
        var primaryChild = reconcileChildFibers(workInProgress, currentPrimaryChild, _nextPrimaryChildren, renderExpirationTime); // If this render doesn't suspend, we need to delete the fallback
        // children. Wait until the complete phase, after we've confirmed the
        // fallback is no longer needed.
        // TODO: Would it be better to store the fallback fragment on
        // the stateNode?
        // Continue rendering the children, like we normally do.

        workInProgress.memoizedState = null;
        return workInProgress.child = primaryChild;
      }
    } else {
      // The current tree has not already timed out. That means the primary
      // children are not wrapped in a fragment fiber.
      var _currentPrimaryChild = current$$1.child;

      if (nextDidTimeout) {
        // Timed out. Wrap the children in a fragment fiber to keep them
        // separate from the fallback children.
        var _nextFallbackChildren3 = nextProps.fallback;

        var _primaryChildFragment3 = createFiberFromFragment( // It shouldn't matter what the pending props are because we aren't
        // going to render this fragment.
        null, mode, NoWork, null);

        _primaryChildFragment3.return = workInProgress;
        _primaryChildFragment3.child = _currentPrimaryChild;

        if (_currentPrimaryChild !== null) {
          _currentPrimaryChild.return = _primaryChildFragment3;
        } // Even though we're creating a new fiber, there are no new children,
        // because we're reusing an already mounted tree. So we don't need to
        // schedule a placement.
        // primaryChildFragment.effectTag |= Placement;


        if ((workInProgress.mode & BatchedMode) === NoMode) {
          // Outside of batched mode, we commit the effects from the
          // partially completed, timed-out tree, too.
          var _progressedState2 = workInProgress.memoizedState;

          var _progressedPrimaryChild2 = _progressedState2 !== null ? workInProgress.child.child : workInProgress.child;

          _primaryChildFragment3.child = _progressedPrimaryChild2;
          var _progressedChild3 = _progressedPrimaryChild2;

          while (_progressedChild3 !== null) {
            _progressedChild3.return = _primaryChildFragment3;
            _progressedChild3 = _progressedChild3.sibling;
          }
        } // Because primaryChildFragment is a new fiber that we're inserting as the
        // parent of a new tree, we need to set its treeBaseDuration.


        if (enableProfilerTimer && workInProgress.mode & ProfileMode) {
          // treeBaseDuration is the sum of all the child tree base durations.
          var _treeBaseDuration2 = 0;
          var _hiddenChild2 = _primaryChildFragment3.child;

          while (_hiddenChild2 !== null) {
            _treeBaseDuration2 += _hiddenChild2.treeBaseDuration;
            _hiddenChild2 = _hiddenChild2.sibling;
          }

          _primaryChildFragment3.treeBaseDuration = _treeBaseDuration2;
        } // Create a fragment from the fallback children, too.


        var _fallbackChildFragment3 = createFiberFromFragment(_nextFallbackChildren3, mode, renderExpirationTime, null);

        _fallbackChildFragment3.return = workInProgress;
        _primaryChildFragment3.sibling = _fallbackChildFragment3;
        _fallbackChildFragment3.effectTag |= Placement;
        _primaryChildFragment3.childExpirationTime = NoWork; // Skip the primary children, and continue working on the
        // fallback children.

        workInProgress.memoizedState = SUSPENDED_MARKER;
        workInProgress.child = _primaryChildFragment3;
        return _fallbackChildFragment3;
      } else {
        // Still haven't timed out.  Continue rendering the children, like we
        // normally do.
        workInProgress.memoizedState = null;
        var _nextPrimaryChildren2 = nextProps.children;
        return workInProgress.child = reconcileChildFibers(workInProgress, _currentPrimaryChild, _nextPrimaryChildren2, renderExpirationTime);
      }
    }
  }
}

function retrySuspenseComponentWithoutHydrating(current$$1, workInProgress, renderExpirationTime) {
  // We're now not suspended nor dehydrated.
  workInProgress.memoizedState = null; // Retry with the full children.

  var nextProps = workInProgress.pendingProps;
  var nextChildren = nextProps.children; // This will ensure that the children get Placement effects and
  // that the old child gets a Deletion effect.
  // We could also call forceUnmountCurrentAndReconcile.

  reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  return workInProgress.child;
}

function mountDehydratedSuspenseComponent(workInProgress, suspenseInstance, renderExpirationTime) {
  // During the first pass, we'll bail out and not drill into the children.
  // Instead, we'll leave the content in place and try to hydrate it later.
  if ((workInProgress.mode & BatchedMode) === NoMode) {
    {
      warning$1(false, 'Cannot hydrate Suspense in legacy mode. Switch from ' + 'ReactDOM.hydrate(element, container) to ' + 'ReactDOM.createSyncRoot(container, { hydrate: true })' + '.render(element) or remove the Suspense components from ' + 'the server rendered components.');
    }

    workInProgress.expirationTime = Sync;
  } else if (isSuspenseInstanceFallback(suspenseInstance)) {
    // This is a client-only boundary. Since we won't get any content from the server
    // for this, we need to schedule that at a higher priority based on when it would
    // have timed out. In theory we could render it in this pass but it would have the
    // wrong priority associated with it and will prevent hydration of parent path.
    // Instead, we'll leave work left on it to render it in a separate commit.
    // TODO This time should be the time at which the server rendered response that is
    // a parent to this boundary was displayed. However, since we currently don't have
    // a protocol to transfer that time, we'll just estimate it by using the current
    // time. This will mean that Suspense timeouts are slightly shifted to later than
    // they should be.
    var serverDisplayTime = requestCurrentTimeForUpdate(); // Schedule a normal pri update to render this content.

    var newExpirationTime = computeAsyncExpiration(serverDisplayTime);

    if (enableSchedulerTracing) {
      markSpawnedWork(newExpirationTime);
    }

    workInProgress.expirationTime = newExpirationTime;
  } else {
    // We'll continue hydrating the rest at offscreen priority since we'll already
    // be showing the right content coming from the server, it is no rush.
    workInProgress.expirationTime = Never;

    if (enableSchedulerTracing) {
      markSpawnedWork(Never);
    }
  }

  return null;
}

function updateDehydratedSuspenseComponent(current$$1, workInProgress, suspenseInstance, suspenseState, renderExpirationTime) {
  // We should never be hydrating at this point because it is the first pass,
  // but after we've already committed once.
  warnIfHydrating();

  if ((workInProgress.mode & BatchedMode) === NoMode) {
    return retrySuspenseComponentWithoutHydrating(current$$1, workInProgress, renderExpirationTime);
  }

  if (isSuspenseInstanceFallback(suspenseInstance)) {
    // This boundary is in a permanent fallback state. In this case, we'll never
    // get an update and we'll never be able to hydrate the final content. Let's just try the
    // client side render instead.
    return retrySuspenseComponentWithoutHydrating(current$$1, workInProgress, renderExpirationTime);
  } // We use childExpirationTime to indicate that a child might depend on context, so if
  // any context has changed, we need to treat is as if the input might have changed.


  var hasContextChanged$$1 = current$$1.childExpirationTime >= renderExpirationTime;

  if (didReceiveUpdate || hasContextChanged$$1) {
    // This boundary has changed since the first render. This means that we are now unable to
    // hydrate it. We might still be able to hydrate it using an earlier expiration time, if
    // we are rendering at lower expiration than sync.
    if (renderExpirationTime < Sync) {
      if (suspenseState.retryTime <= renderExpirationTime) {
        // This render is even higher pri than we've seen before, let's try again
        // at even higher pri.
        var attemptHydrationAtExpirationTime = renderExpirationTime + 1;
        suspenseState.retryTime = attemptHydrationAtExpirationTime;
        scheduleWork(current$$1, attemptHydrationAtExpirationTime); // TODO: Early abort this render.
      } else {// We have already tried to ping at a higher priority than we're rendering with
          // so if we got here, we must have failed to hydrate at those levels. We must
          // now give up. Instead, we're going to delete the whole subtree and instead inject
          // a new real Suspense boundary to take its place, which may render content
          // or fallback. This might suspend for a while and if it does we might still have
          // an opportunity to hydrate before this pass commits.
        }
    } // If we have scheduled higher pri work above, this will probably just abort the render
    // since we now have higher priority work, but in case it doesn't, we need to prepare to
    // render something, if we time out. Even if that requires us to delete everything and
    // skip hydration.
    // Delay having to do this as long as the suspense timeout allows us.


    renderDidSuspendDelayIfPossible();
    return retrySuspenseComponentWithoutHydrating(current$$1, workInProgress, renderExpirationTime);
  } else if (isSuspenseInstancePending(suspenseInstance)) {
    // This component is still pending more data from the server, so we can't hydrate its
    // content. We treat it as if this component suspended itself. It might seem as if
    // we could just try to render it client-side instead. However, this will perform a
    // lot of unnecessary work and is unlikely to complete since it often will suspend
    // on missing data anyway. Additionally, the server might be able to render more
    // than we can on the client yet. In that case we'd end up with more fallback states
    // on the client than if we just leave it alone. If the server times out or errors
    // these should update this boundary to the permanent Fallback state instead.
    // Mark it as having captured (i.e. suspended).
    workInProgress.effectTag |= DidCapture; // Leave the child in place. I.e. the dehydrated fragment.

    workInProgress.child = current$$1.child; // Register a callback to retry this boundary once the server has sent the result.

    registerSuspenseInstanceRetry(suspenseInstance, retryDehydratedSuspenseBoundary.bind(null, current$$1));
    return null;
  } else {
    // This is the first attempt.
    reenterHydrationStateFromDehydratedSuspenseInstance(workInProgress, suspenseInstance);
    var nextProps = workInProgress.pendingProps;
    var nextChildren = nextProps.children;
    var child = mountChildFibers(workInProgress, null, nextChildren, renderExpirationTime);
    var node = child;

    while (node) {
      // Mark each child as hydrating. This is a fast path to know whether this
      // tree is part of a hydrating tree. This is used to determine if a child
      // node has fully mounted yet, and for scheduling event replaying.
      // Conceptually this is similar to Placement in that a new subtree is
      // inserted into the React tree here. It just happens to not need DOM
      // mutations because it already exists.
      node.effectTag |= Hydrating;
      node = node.sibling;
    }

    workInProgress.child = child;
    return workInProgress.child;
  }
}

function scheduleWorkOnFiber(fiber, renderExpirationTime) {
  if (fiber.expirationTime < renderExpirationTime) {
    fiber.expirationTime = renderExpirationTime;
  }

  var alternate = fiber.alternate;

  if (alternate !== null && alternate.expirationTime < renderExpirationTime) {
    alternate.expirationTime = renderExpirationTime;
  }

  scheduleWorkOnParentPath(fiber.return, renderExpirationTime);
}

function propagateSuspenseContextChange(workInProgress, firstChild, renderExpirationTime) {
  // Mark any Suspense boundaries with fallbacks as having work to do.
  // If they were previously forced into fallbacks, they may now be able
  // to unblock.
  var node = firstChild;

  while (node !== null) {
    if (node.tag === SuspenseComponent) {
      var state = node.memoizedState;

      if (state !== null) {
        scheduleWorkOnFiber(node, renderExpirationTime);
      }
    } else if (node.tag === SuspenseListComponent) {
      // If the tail is hidden there might not be an Suspense boundaries
      // to schedule work on. In this case we have to schedule it on the
      // list itself.
      // We don't have to traverse to the children of the list since
      // the list will propagate the change when it rerenders.
      scheduleWorkOnFiber(node, renderExpirationTime);
    } else if (node.child !== null) {
      node.child.return = node;
      node = node.child;
      continue;
    }

    if (node === workInProgress) {
      return;
    }

    while (node.sibling === null) {
      if (node.return === null || node.return === workInProgress) {
        return;
      }

      node = node.return;
    }

    node.sibling.return = node.return;
    node = node.sibling;
  }
}

function findLastContentRow(firstChild) {
  // This is going to find the last row among these children that is already
  // showing content on the screen, as opposed to being in fallback state or
  // new. If a row has multiple Suspense boundaries, any of them being in the
  // fallback state, counts as the whole row being in a fallback state.
  // Note that the "rows" will be workInProgress, but any nested children
  // will still be current since we haven't rendered them yet. The mounted
  // order may not be the same as the new order. We use the new order.
  var row = firstChild;
  var lastContentRow = null;

  while (row !== null) {
    var currentRow = row.alternate; // New rows can't be content rows.

    if (currentRow !== null && findFirstSuspended(currentRow) === null) {
      lastContentRow = row;
    }

    row = row.sibling;
  }

  return lastContentRow;
}

function validateRevealOrder(revealOrder) {
  {
    if (revealOrder !== undefined && revealOrder !== 'forwards' && revealOrder !== 'backwards' && revealOrder !== 'together' && !didWarnAboutRevealOrder[revealOrder]) {
      didWarnAboutRevealOrder[revealOrder] = true;

      if (typeof revealOrder === 'string') {
        switch (revealOrder.toLowerCase()) {
          case 'together':
          case 'forwards':
          case 'backwards':
            {
              warning$1(false, '"%s" is not a valid value for revealOrder on <SuspenseList />. ' + 'Use lowercase "%s" instead.', revealOrder, revealOrder.toLowerCase());
              break;
            }

          case 'forward':
          case 'backward':
            {
              warning$1(false, '"%s" is not a valid value for revealOrder on <SuspenseList />. ' + 'React uses the -s suffix in the spelling. Use "%ss" instead.', revealOrder, revealOrder.toLowerCase());
              break;
            }

          default:
            warning$1(false, '"%s" is not a supported revealOrder on <SuspenseList />. ' + 'Did you mean "together", "forwards" or "backwards"?', revealOrder);
            break;
        }
      } else {
        warning$1(false, '%s is not a supported value for revealOrder on <SuspenseList />. ' + 'Did you mean "together", "forwards" or "backwards"?', revealOrder);
      }
    }
  }
}

function validateTailOptions(tailMode, revealOrder) {
  {
    if (tailMode !== undefined && !didWarnAboutTailOptions[tailMode]) {
      if (tailMode !== 'collapsed' && tailMode !== 'hidden') {
        didWarnAboutTailOptions[tailMode] = true;
        warning$1(false, '"%s" is not a supported value for tail on <SuspenseList />. ' + 'Did you mean "collapsed" or "hidden"?', tailMode);
      } else if (revealOrder !== 'forwards' && revealOrder !== 'backwards') {
        didWarnAboutTailOptions[tailMode] = true;
        warning$1(false, '<SuspenseList tail="%s" /> is only valid if revealOrder is ' + '"forwards" or "backwards". ' + 'Did you mean to specify revealOrder="forwards"?', tailMode);
      }
    }
  }
}

function validateSuspenseListNestedChild(childSlot, index) {
  {
    var isArray = Array.isArray(childSlot);
    var isIterable = !isArray && typeof getIteratorFn(childSlot) === 'function';

    if (isArray || isIterable) {
      var type = isArray ? 'array' : 'iterable';
      warning$1(false, 'A nested %s was passed to row #%s in <SuspenseList />. Wrap it in ' + 'an additional SuspenseList to configure its revealOrder: ' + '<SuspenseList revealOrder=...> ... ' + '<SuspenseList revealOrder=...>{%s}</SuspenseList> ... ' + '</SuspenseList>', type, index, type);
      return false;
    }
  }

  return true;
}

function validateSuspenseListChildren(children, revealOrder) {
  {
    if ((revealOrder === 'forwards' || revealOrder === 'backwards') && children !== undefined && children !== null && children !== false) {
      if (Array.isArray(children)) {
        for (var i = 0; i < children.length; i++) {
          if (!validateSuspenseListNestedChild(children[i], i)) {
            return;
          }
        }
      } else {
        var iteratorFn = getIteratorFn(children);

        if (typeof iteratorFn === 'function') {
          var childrenIterator = iteratorFn.call(children);

          if (childrenIterator) {
            var step = childrenIterator.next();
            var _i = 0;

            for (; !step.done; step = childrenIterator.next()) {
              if (!validateSuspenseListNestedChild(step.value, _i)) {
                return;
              }

              _i++;
            }
          }
        } else {
          warning$1(false, 'A single row was passed to a <SuspenseList revealOrder="%s" />. ' + 'This is not useful since it needs multiple rows. ' + 'Did you mean to pass multiple children or an array?', revealOrder);
        }
      }
    }
  }
}

function initSuspenseListRenderState(workInProgress, isBackwards, tail, lastContentRow, tailMode, lastEffectBeforeRendering) {
  var renderState = workInProgress.memoizedState;

  if (renderState === null) {
    workInProgress.memoizedState = {
      isBackwards: isBackwards,
      rendering: null,
      last: lastContentRow,
      tail: tail,
      tailExpiration: 0,
      tailMode: tailMode,
      lastEffect: lastEffectBeforeRendering
    };
  } else {
    // We can reuse the existing object from previous renders.
    renderState.isBackwards = isBackwards;
    renderState.rendering = null;
    renderState.last = lastContentRow;
    renderState.tail = tail;
    renderState.tailExpiration = 0;
    renderState.tailMode = tailMode;
    renderState.lastEffect = lastEffectBeforeRendering;
  }
} // This can end up rendering this component multiple passes.
// The first pass splits the children fibers into two sets. A head and tail.
// We first render the head. If anything is in fallback state, we do another
// pass through beginWork to rerender all children (including the tail) with
// the force suspend context. If the first render didn't have anything in
// in fallback state. Then we render each row in the tail one-by-one.
// That happens in the completeWork phase without going back to beginWork.


function updateSuspenseListComponent(current$$1, workInProgress, renderExpirationTime) {
  var nextProps = workInProgress.pendingProps;
  var revealOrder = nextProps.revealOrder;
  var tailMode = nextProps.tail;
  var newChildren = nextProps.children;
  validateRevealOrder(revealOrder);
  validateTailOptions(tailMode, revealOrder);
  validateSuspenseListChildren(newChildren, revealOrder);
  reconcileChildren(current$$1, workInProgress, newChildren, renderExpirationTime);
  var suspenseContext = suspenseStackCursor.current;
  var shouldForceFallback = hasSuspenseContext(suspenseContext, ForceSuspenseFallback);

  if (shouldForceFallback) {
    suspenseContext = setShallowSuspenseContext(suspenseContext, ForceSuspenseFallback);
    workInProgress.effectTag |= DidCapture;
  } else {
    var didSuspendBefore = current$$1 !== null && (current$$1.effectTag & DidCapture) !== NoEffect;

    if (didSuspendBefore) {
      // If we previously forced a fallback, we need to schedule work
      // on any nested boundaries to let them know to try to render
      // again. This is the same as context updating.
      propagateSuspenseContextChange(workInProgress, workInProgress.child, renderExpirationTime);
    }

    suspenseContext = setDefaultShallowSuspenseContext(suspenseContext);
  }

  pushSuspenseContext(workInProgress, suspenseContext);

  if ((workInProgress.mode & BatchedMode) === NoMode) {
    // Outside of batched mode, SuspenseList doesn't work so we just
    // use make it a noop by treating it as the default revealOrder.
    workInProgress.memoizedState = null;
  } else {
    switch (revealOrder) {
      case 'forwards':
        {
          var lastContentRow = findLastContentRow(workInProgress.child);
          var tail;

          if (lastContentRow === null) {
            // The whole list is part of the tail.
            // TODO: We could fast path by just rendering the tail now.
            tail = workInProgress.child;
            workInProgress.child = null;
          } else {
            // Disconnect the tail rows after the content row.
            // We're going to render them separately later.
            tail = lastContentRow.sibling;
            lastContentRow.sibling = null;
          }

          initSuspenseListRenderState(workInProgress, false, // isBackwards
          tail, lastContentRow, tailMode, workInProgress.lastEffect);
          break;
        }

      case 'backwards':
        {
          // We're going to find the first row that has existing content.
          // At the same time we're going to reverse the list of everything
          // we pass in the meantime. That's going to be our tail in reverse
          // order.
          var _tail = null;
          var row = workInProgress.child;
          workInProgress.child = null;

          while (row !== null) {
            var currentRow = row.alternate; // New rows can't be content rows.

            if (currentRow !== null && findFirstSuspended(currentRow) === null) {
              // This is the beginning of the main content.
              workInProgress.child = row;
              break;
            }

            var nextRow = row.sibling;
            row.sibling = _tail;
            _tail = row;
            row = nextRow;
          } // TODO: If workInProgress.child is null, we can continue on the tail immediately.


          initSuspenseListRenderState(workInProgress, true, // isBackwards
          _tail, null, // last
          tailMode, workInProgress.lastEffect);
          break;
        }

      case 'together':
        {
          initSuspenseListRenderState(workInProgress, false, // isBackwards
          null, // tail
          null, // last
          undefined, workInProgress.lastEffect);
          break;
        }

      default:
        {
          // The default reveal order is the same as not having
          // a boundary.
          workInProgress.memoizedState = null;
        }
    }
  }

  return workInProgress.child;
}

function updatePortalComponent(current$$1, workInProgress, renderExpirationTime) {
  pushHostContainer(workInProgress, workInProgress.stateNode.containerInfo);
  var nextChildren = workInProgress.pendingProps;

  if (current$$1 === null) {
    // Portals are special because we don't append the children during mount
    // but at commit. Therefore we need to track insertions which the normal
    // flow doesn't do during mount. This doesn't happen at the root because
    // the root always starts with a "current" with a null child.
    // TODO: Consider unifying this with how the root works.
    workInProgress.child = reconcileChildFibers(workInProgress, null, nextChildren, renderExpirationTime);
  } else {
    reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  }

  return workInProgress.child;
}

function updateContextProvider(current$$1, workInProgress, renderExpirationTime) {
  var providerType = workInProgress.type;
  var context = providerType._context;
  var newProps = workInProgress.pendingProps;
  var oldProps = workInProgress.memoizedProps;
  var newValue = newProps.value;

  {
    var providerPropTypes = workInProgress.type.propTypes;

    if (providerPropTypes) {
      checkPropTypes(providerPropTypes, newProps, 'prop', 'Context.Provider', getCurrentFiberStackInDev);
    }
  }

  pushProvider(workInProgress, newValue);

  if (oldProps !== null) {
    var oldValue = oldProps.value;
    var changedBits = calculateChangedBits(context, newValue, oldValue);

    if (changedBits === 0) {
      // No change. Bailout early if children are the same.
      if (oldProps.children === newProps.children && !hasContextChanged()) {
        return bailoutOnAlreadyFinishedWork(current$$1, workInProgress, renderExpirationTime);
      }
    } else {
      // The context value changed. Search for matching consumers and schedule
      // them to update.
      propagateContextChange(workInProgress, context, changedBits, renderExpirationTime);
    }
  }

  var newChildren = newProps.children;
  reconcileChildren(current$$1, workInProgress, newChildren, renderExpirationTime);
  return workInProgress.child;
}

var hasWarnedAboutUsingContextAsConsumer = false;

function updateContextConsumer(current$$1, workInProgress, renderExpirationTime) {
  var context = workInProgress.type; // The logic below for Context differs depending on PROD or DEV mode. In
  // DEV mode, we create a separate object for Context.Consumer that acts
  // like a proxy to Context. This proxy object adds unnecessary code in PROD
  // so we use the old behaviour (Context.Consumer references Context) to
  // reduce size and overhead. The separate object references context via
  // a property called "_context", which also gives us the ability to check
  // in DEV mode if this property exists or not and warn if it does not.

  {
    if (context._context === undefined) {
      // This may be because it's a Context (rather than a Consumer).
      // Or it may be because it's older React where they're the same thing.
      // We only want to warn if we're sure it's a new React.
      if (context !== context.Consumer) {
        if (!hasWarnedAboutUsingContextAsConsumer) {
          hasWarnedAboutUsingContextAsConsumer = true;
          warning$1(false, 'Rendering <Context> directly is not supported and will be removed in ' + 'a future major release. Did you mean to render <Context.Consumer> instead?');
        }
      }
    } else {
      context = context._context;
    }
  }

  var newProps = workInProgress.pendingProps;
  var render = newProps.children;

  {
    !(typeof render === 'function') ? warningWithoutStack$1(false, 'A context consumer was rendered with multiple children, or a child ' + "that isn't a function. A context consumer expects a single child " + 'that is a function. If you did pass a function, make sure there ' + 'is no trailing or leading whitespace around it.') : void 0;
  }

  prepareToReadContext(workInProgress, renderExpirationTime);
  var newValue = readContext(context, newProps.unstable_observedBits);
  var newChildren;

  {
    ReactCurrentOwner$3.current = workInProgress;
    setCurrentPhase('render');
    newChildren = render(newValue);
    setCurrentPhase(null);
  } // React DevTools reads this flag.


  workInProgress.effectTag |= PerformedWork;
  reconcileChildren(current$$1, workInProgress, newChildren, renderExpirationTime);
  return workInProgress.child;
}

function updateFundamentalComponent$1(current$$1, workInProgress, renderExpirationTime) {
  var fundamentalImpl = workInProgress.type.impl;

  if (fundamentalImpl.reconcileChildren === false) {
    return null;
  }

  var nextProps = workInProgress.pendingProps;
  var nextChildren = nextProps.children;
  reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  return workInProgress.child;
}

function updateScopeComponent(current$$1, workInProgress, renderExpirationTime) {
  var nextProps = workInProgress.pendingProps;
  var nextChildren = nextProps.children;
  reconcileChildren(current$$1, workInProgress, nextChildren, renderExpirationTime);
  return workInProgress.child;
}

function markWorkInProgressReceivedUpdate() {
  didReceiveUpdate = true;
}

function bailoutOnAlreadyFinishedWork(current$$1, workInProgress, renderExpirationTime) {
  cancelWorkTimer(workInProgress);

  if (current$$1 !== null) {
    // Reuse previous dependencies
    workInProgress.dependencies = current$$1.dependencies;
  }

  if (enableProfilerTimer) {
    // Don't update "base" render times for bailouts.
    stopProfilerTimerIfRunning(workInProgress);
  }

  var updateExpirationTime = workInProgress.expirationTime;

  if (updateExpirationTime !== NoWork) {
    markUnprocessedUpdateTime(updateExpirationTime);
  } // Check if the children have any pending work.


  var childExpirationTime = workInProgress.childExpirationTime;

  if (childExpirationTime < renderExpirationTime) {
    // The children don't have any work either. We can skip them.
    // TODO: Once we add back resuming, we should check if the children are
    // a work-in-progress set. If so, we need to transfer their effects.
    return null;
  } else {
    // This fiber doesn't have work, but its subtree does. Clone the child
    // fibers and continue.
    cloneChildFibers(current$$1, workInProgress);
    return workInProgress.child;
  }
}

function remountFiber(current$$1, oldWorkInProgress, newWorkInProgress) {
  {
    var returnFiber = oldWorkInProgress.return;

    if (returnFiber === null) {
      throw new Error('Cannot swap the root fiber.');
    } // Disconnect from the old current.
    // It will get deleted.


    current$$1.alternate = null;
    oldWorkInProgress.alternate = null; // Connect to the new tree.

    newWorkInProgress.index = oldWorkInProgress.index;
    newWorkInProgress.sibling = oldWorkInProgress.sibling;
    newWorkInProgress.return = oldWorkInProgress.return;
    newWorkInProgress.ref = oldWorkInProgress.ref; // Replace the child/sibling pointers above it.

    if (oldWorkInProgress === returnFiber.child) {
      returnFiber.child = newWorkInProgress;
    } else {
      var prevSibling = returnFiber.child;

      if (prevSibling === null) {
        throw new Error('Expected parent to have a child.');
      }

      while (prevSibling.sibling !== oldWorkInProgress) {
        prevSibling = prevSibling.sibling;

        if (prevSibling === null) {
          throw new Error('Expected to find the previous sibling.');
        }
      }

      prevSibling.sibling = newWorkInProgress;
    } // Delete the old fiber and place the new one.
    // Since the old fiber is disconnected, we have to schedule it manually.


    var last = returnFiber.lastEffect;

    if (last !== null) {
      last.nextEffect = current$$1;
      returnFiber.lastEffect = current$$1;
    } else {
      returnFiber.firstEffect = returnFiber.lastEffect = current$$1;
    }

    current$$1.nextEffect = null;
    current$$1.effectTag = Deletion;
    newWorkInProgress.effectTag |= Placement; // Restart work from the new fiber.

    return newWorkInProgress;
  }
}

function beginWork$1(current$$1, workInProgress, renderExpirationTime) {
  var updateExpirationTime = workInProgress.expirationTime;

  {
    if (workInProgress._debugNeedsRemount && current$$1 !== null) {
      // This will restart the begin phase with a new fiber.
      return remountFiber(current$$1, workInProgress, createFiberFromTypeAndProps(workInProgress.type, workInProgress.key, workInProgress.pendingProps, workInProgress._debugOwner || null, workInProgress.mode, workInProgress.expirationTime));
    }
  }

  if (current$$1 !== null) {
    var oldProps = current$$1.memoizedProps;
    var newProps = workInProgress.pendingProps;

    if (oldProps !== newProps || hasContextChanged() || ( // Force a re-render if the implementation changed due to hot reload:
    workInProgress.type !== current$$1.type)) {
      // If props or context changed, mark the fiber as having performed work.
      // This may be unset if the props are determined to be equal later (memo).
      didReceiveUpdate = true;
    } else if (updateExpirationTime < renderExpirationTime) {
      didReceiveUpdate = false; // This fiber does not have any pending work. Bailout without entering
      // the begin phase. There's still some bookkeeping we that needs to be done
      // in this optimized path, mostly pushing stuff onto the stack.

      switch (workInProgress.tag) {
        case HostRoot:
          pushHostRootContext(workInProgress);
          resetHydrationState();
          break;

        case HostComponent:
          pushHostContext(workInProgress);

          if (workInProgress.mode & ConcurrentMode && renderExpirationTime !== Never && shouldDeprioritizeSubtree(workInProgress.type, newProps)) {
            if (enableSchedulerTracing) {
              markSpawnedWork(Never);
            } // Schedule this fiber to re-render at offscreen priority. Then bailout.


            workInProgress.expirationTime = workInProgress.childExpirationTime = Never;
            return null;
          }

          break;

        case ClassComponent:
          {
            var Component = workInProgress.type;

            if (isContextProvider(Component)) {
              pushContextProvider(workInProgress);
            }

            break;
          }

        case HostPortal:
          pushHostContainer(workInProgress, workInProgress.stateNode.containerInfo);
          break;

        case ContextProvider:
          {
            var newValue = workInProgress.memoizedProps.value;
            pushProvider(workInProgress, newValue);
            break;
          }

        case Profiler:
          if (enableProfilerTimer) {
            workInProgress.effectTag |= Update;
          }

          break;

        case SuspenseComponent:
          {
            var state = workInProgress.memoizedState;

            if (state !== null) {
              if (enableSuspenseServerRenderer) {
                if (state.dehydrated !== null) {
                  pushSuspenseContext(workInProgress, setDefaultShallowSuspenseContext(suspenseStackCursor.current)); // We know that this component will suspend again because if it has
                  // been unsuspended it has committed as a resolved Suspense component.
                  // If it needs to be retried, it should have work scheduled on it.

                  workInProgress.effectTag |= DidCapture;
                  break;
                }
              } // If this boundary is currently timed out, we need to decide
              // whether to retry the primary children, or to skip over it and
              // go straight to the fallback. Check the priority of the primary
              // child fragment.


              var primaryChildFragment = workInProgress.child;
              var primaryChildExpirationTime = primaryChildFragment.childExpirationTime;

              if (primaryChildExpirationTime !== NoWork && primaryChildExpirationTime >= renderExpirationTime) {
                // The primary children have pending work. Use the normal path
                // to attempt to render the primary children again.
                return updateSuspenseComponent(current$$1, workInProgress, renderExpirationTime);
              } else {
                pushSuspenseContext(workInProgress, setDefaultShallowSuspenseContext(suspenseStackCursor.current)); // The primary children do not have pending work with sufficient
                // priority. Bailout.

                var child = bailoutOnAlreadyFinishedWork(current$$1, workInProgress, renderExpirationTime);

                if (child !== null) {
                  // The fallback children have pending work. Skip over the
                  // primary children and work on the fallback.
                  return child.sibling;
                } else {
                  return null;
                }
              }
            } else {
              pushSuspenseContext(workInProgress, setDefaultShallowSuspenseContext(suspenseStackCursor.current));
            }

            break;
          }

        case SuspenseListComponent:
          {
            var didSuspendBefore = (current$$1.effectTag & DidCapture) !== NoEffect;
            var hasChildWork = workInProgress.childExpirationTime >= renderExpirationTime;

            if (didSuspendBefore) {
              if (hasChildWork) {
                // If something was in fallback state last time, and we have all the
                // same children then we're still in progressive loading state.
                // Something might get unblocked by state updates or retries in the
                // tree which will affect the tail. So we need to use the normal
                // path to compute the correct tail.
                return updateSuspenseListComponent(current$$1, workInProgress, renderExpirationTime);
              } // If none of the children had any work, that means that none of
              // them got retried so they'll still be blocked in the same way
              // as before. We can fast bail out.


              workInProgress.effectTag |= DidCapture;
            } // If nothing suspended before and we're rendering the same children,
            // then the tail doesn't matter. Anything new that suspends will work
            // in the "together" mode, so we can continue from the state we had.


            var renderState = workInProgress.memoizedState;

            if (renderState !== null) {
              // Reset to the "together" mode in case we've started a different
              // update in the past but didn't complete it.
              renderState.rendering = null;
              renderState.tail = null;
            }

            pushSuspenseContext(workInProgress, suspenseStackCursor.current);

            if (hasChildWork) {
              break;
            } else {
              // If none of the children had any work, that means that none of
              // them got retried so they'll still be blocked in the same way
              // as before. We can fast bail out.
              return null;
            }
          }
      }

      return bailoutOnAlreadyFinishedWork(current$$1, workInProgress, renderExpirationTime);
    } else {
      // An update was scheduled on this fiber, but there are no new props
      // nor legacy context. Set this to false. If an update queue or context
      // consumer produces a changed value, it will set this to true. Otherwise,
      // the component will assume the children have not changed and bail out.
      didReceiveUpdate = false;
    }
  } else {
    didReceiveUpdate = false;
  } // Before entering the begin phase, clear the expiration time.


  workInProgress.expirationTime = NoWork;

  switch (workInProgress.tag) {
    case IndeterminateComponent:
      {
        return mountIndeterminateComponent(current$$1, workInProgress, workInProgress.type, renderExpirationTime);
      }

    case LazyComponent:
      {
        var elementType = workInProgress.elementType;
        return mountLazyComponent(current$$1, workInProgress, elementType, updateExpirationTime, renderExpirationTime);
      }

    case FunctionComponent:
      {
        var _Component = workInProgress.type;
        var unresolvedProps = workInProgress.pendingProps;
        var resolvedProps = workInProgress.elementType === _Component ? unresolvedProps : resolveDefaultProps(_Component, unresolvedProps);
        return updateFunctionComponent(current$$1, workInProgress, _Component, resolvedProps, renderExpirationTime);
      }

    case ClassComponent:
      {
        var _Component2 = workInProgress.type;
        var _unresolvedProps = workInProgress.pendingProps;

        var _resolvedProps = workInProgress.elementType === _Component2 ? _unresolvedProps : resolveDefaultProps(_Component2, _unresolvedProps);

        return updateClassComponent(current$$1, workInProgress, _Component2, _resolvedProps, renderExpirationTime);
      }

    case HostRoot:
      return updateHostRoot(current$$1, workInProgress, renderExpirationTime);

    case HostComponent:
      return updateHostComponent(current$$1, workInProgress, renderExpirationTime);

    case HostText:
      return updateHostText(current$$1, workInProgress);

    case SuspenseComponent:
      return updateSuspenseComponent(current$$1, workInProgress, renderExpirationTime);

    case HostPortal:
      return updatePortalComponent(current$$1, workInProgress, renderExpirationTime);

    case ForwardRef:
      {
        var type = workInProgress.type;
        var _unresolvedProps2 = workInProgress.pendingProps;

        var _resolvedProps2 = workInProgress.elementType === type ? _unresolvedProps2 : resolveDefaultProps(type, _unresolvedProps2);

        return updateForwardRef(current$$1, workInProgress, type, _resolvedProps2, renderExpirationTime);
      }

    case Fragment:
      return updateFragment(current$$1, workInProgress, renderExpirationTime);

    case Mode:
      return updateMode(current$$1, workInProgress, renderExpirationTime);

    case Profiler:
      return updateProfiler(current$$1, workInProgress, renderExpirationTime);

    case ContextProvider:
      return updateContextProvider(current$$1, workInProgress, renderExpirationTime);

    case ContextConsumer:
      return updateContextConsumer(current$$1, workInProgress, renderExpirationTime);

    case MemoComponent:
      {
        var _type2 = workInProgress.type;
        var _unresolvedProps3 = workInProgress.pendingProps; // Resolve outer props first, then resolve inner props.

        var _resolvedProps3 = resolveDefaultProps(_type2, _unresolvedProps3);

        {
          if (workInProgress.type !== workInProgress.elementType) {
            var outerPropTypes = _type2.propTypes;

            if (outerPropTypes) {
              checkPropTypes(outerPropTypes, _resolvedProps3, // Resolved for outer only
              'prop', getComponentName(_type2), getCurrentFiberStackInDev);
            }
          }
        }

        _resolvedProps3 = resolveDefaultProps(_type2.type, _resolvedProps3);
        return updateMemoComponent(current$$1, workInProgress, _type2, _resolvedProps3, updateExpirationTime, renderExpirationTime);
      }

    case SimpleMemoComponent:
      {
        return updateSimpleMemoComponent(current$$1, workInProgress, workInProgress.type, workInProgress.pendingProps, updateExpirationTime, renderExpirationTime);
      }

    case IncompleteClassComponent:
      {
        var _Component3 = workInProgress.type;
        var _unresolvedProps4 = workInProgress.pendingProps;

        var _resolvedProps4 = workInProgress.elementType === _Component3 ? _unresolvedProps4 : resolveDefaultProps(_Component3, _unresolvedProps4);

        return mountIncompleteClassComponent(current$$1, workInProgress, _Component3, _resolvedProps4, renderExpirationTime);
      }

    case SuspenseListComponent:
      {
        return updateSuspenseListComponent(current$$1, workInProgress, renderExpirationTime);
      }

    case FundamentalComponent:
      {
        if (enableFundamentalAPI) {
          return updateFundamentalComponent$1(current$$1, workInProgress, renderExpirationTime);
        }

        break;
      }

    case ScopeComponent:
      {
        if (enableScopeAPI) {
          return updateScopeComponent(current$$1, workInProgress, renderExpirationTime);
        }

        break;
      }
  }

  {
    {
      throw Error("Unknown unit of work tag (" + workInProgress.tag + "). This error is likely caused by a bug in React. Please file an issue.");
    }
  }
}

function createFundamentalStateInstance(currentFiber, props, impl, state) {
  return {
    currentFiber: currentFiber,
    impl: impl,
    instance: null,
    prevProps: null,
    props: props,
    state: state
  };
}

function isFiberSuspenseAndTimedOut(fiber) {
  return fiber.tag === SuspenseComponent && fiber.memoizedState !== null;
}

function getSuspenseFallbackChild(fiber) {
  return fiber.child.sibling.child;
}

function collectScopedNodes(node, fn, scopedNodes) {
  if (enableScopeAPI) {
    if (node.tag === HostComponent) {
      var _type = node.type,
          memoizedProps = node.memoizedProps;

      if (fn(_type, memoizedProps) === true) {
        scopedNodes.push(getPublicInstance(node.stateNode));
      }
    }

    var child = node.child;

    if (isFiberSuspenseAndTimedOut(node)) {
      child = getSuspenseFallbackChild(node);
    }

    if (child !== null) {
      collectScopedNodesFromChildren(child, fn, scopedNodes);
    }
  }
}

function collectFirstScopedNode(node, fn) {
  if (enableScopeAPI) {
    if (node.tag === HostComponent) {
      var _type2 = node.type,
          memoizedProps = node.memoizedProps;

      if (fn(_type2, memoizedProps) === true) {
        return getPublicInstance(node.stateNode);
      }
    }

    var child = node.child;

    if (isFiberSuspenseAndTimedOut(node)) {
      child = getSuspenseFallbackChild(node);
    }

    if (child !== null) {
      return collectFirstScopedNodeFromChildren(child, fn);
    }
  }

  return null;
}

function collectScopedNodesFromChildren(startingChild, fn, scopedNodes) {
  var child = startingChild;

  while (child !== null) {
    collectScopedNodes(child, fn, scopedNodes);
    child = child.sibling;
  }
}

function collectFirstScopedNodeFromChildren(startingChild, fn) {
  var child = startingChild;

  while (child !== null) {
    var scopedNode = collectFirstScopedNode(child, fn);

    if (scopedNode !== null) {
      return scopedNode;
    }

    child = child.sibling;
  }

  return null;
}

function collectNearestScopeMethods(node, scope, childrenScopes) {
  if (isValidScopeNode(node, scope)) {
    childrenScopes.push(node.stateNode.methods);
  } else {
    var child = node.child;

    if (isFiberSuspenseAndTimedOut(node)) {
      child = getSuspenseFallbackChild(node);
    }

    if (child !== null) {
      collectNearestChildScopeMethods(child, scope, childrenScopes);
    }
  }
}

function collectNearestChildScopeMethods(startingChild, scope, childrenScopes) {
  var child = startingChild;

  while (child !== null) {
    collectNearestScopeMethods(child, scope, childrenScopes);
    child = child.sibling;
  }
}

function isValidScopeNode(node, scope) {
  return node.tag === ScopeComponent && node.type === scope && node.stateNode !== null;
}

function createScopeMethods(scope, instance) {
  return {
    getChildren: function () {
      var currentFiber = instance.fiber;
      var child = currentFiber.child;
      var childrenScopes = [];

      if (child !== null) {
        collectNearestChildScopeMethods(child, scope, childrenScopes);
      }

      return childrenScopes.length === 0 ? null : childrenScopes;
    },
    getChildrenFromRoot: function () {
      var currentFiber = instance.fiber;
      var node = currentFiber;

      while (node !== null) {
        var parent = node.return;

        if (parent === null) {
          break;
        }

        node = parent;

        if (node.tag === ScopeComponent && node.type === scope) {
          break;
        }
      }

      var childrenScopes = [];
      collectNearestChildScopeMethods(node.child, scope, childrenScopes);
      return childrenScopes.length === 0 ? null : childrenScopes;
    },
    getParent: function () {
      var node = instance.fiber.return;

      while (node !== null) {
        if (node.tag === ScopeComponent && node.type === scope) {
          return node.stateNode.methods;
        }

        node = node.return;
      }

      return null;
    },
    getProps: function () {
      var currentFiber = instance.fiber;
      return currentFiber.memoizedProps;
    },
    queryAllNodes: function (fn) {
      var currentFiber = instance.fiber;
      var child = currentFiber.child;
      var scopedNodes = [];

      if (child !== null) {
        collectScopedNodesFromChildren(child, fn, scopedNodes);
      }

      return scopedNodes.length === 0 ? null : scopedNodes;
    },
    queryFirstNode: function (fn) {
      var currentFiber = instance.fiber;
      var child = currentFiber.child;

      if (child !== null) {
        return collectFirstScopedNodeFromChildren(child, fn);
      }

      return null;
    },
    containsNode: function (node) {
      var fiber = getInstanceFromNode$2(node);

      while (fiber !== null) {
        if (fiber.tag === ScopeComponent && fiber.type === scope && fiber.stateNode === instance) {
          return true;
        }

        fiber = fiber.return;
      }

      return false;
    }
  };
}

function markUpdate(workInProgress) {
  // Tag the fiber with an update effect. This turns a Placement into
  // a PlacementAndUpdate.
  workInProgress.effectTag |= Update;
}

function markRef$1(workInProgress) {
  workInProgress.effectTag |= Ref;
}

var appendAllChildren;
var updateHostContainer;
var updateHostComponent$1;
var updateHostText$1;

if (supportsMutation) {
  // Mutation mode
  appendAllChildren = function (parent, workInProgress, needsVisibilityToggle, isHidden) {
    // We only have the top Fiber that was created but we need recurse down its
    // children to find all the terminal nodes.
    var node = workInProgress.child;

    while (node !== null) {
      if (node.tag === HostComponent || node.tag === HostText) {
        appendInitialChild(parent, node.stateNode);
      } else if (enableFundamentalAPI && node.tag === FundamentalComponent) {
        appendInitialChild(parent, node.stateNode.instance);
      } else if (node.tag === HostPortal) {// If we have a portal child, then we don't want to traverse
        // down its children. Instead, we'll get insertions from each child in
        // the portal directly.
      } else if (node.child !== null) {
        node.child.return = node;
        node = node.child;
        continue;
      }

      if (node === workInProgress) {
        return;
      }

      while (node.sibling === null) {
        if (node.return === null || node.return === workInProgress) {
          return;
        }

        node = node.return;
      }

      node.sibling.return = node.return;
      node = node.sibling;
    }
  };

  updateHostContainer = function (workInProgress) {// Noop
  };

  updateHostComponent$1 = function (current, workInProgress, type, newProps, rootContainerInstance) {
    // If we have an alternate, that means this is an update and we need to
    // schedule a side-effect to do the updates.
    var oldProps = current.memoizedProps;

    if (oldProps === newProps) {
      // In mutation mode, this is sufficient for a bailout because
      // we won't touch this node even if children changed.
      return;
    } // If we get updated because one of our children updated, we don't
    // have newProps so we'll have to reuse them.
    // TODO: Split the update API as separate for the props vs. children.
    // Even better would be if children weren't special cased at all tho.


    var instance = workInProgress.stateNode;
    var currentHostContext = getHostContext(); // TODO: Experiencing an error where oldProps is null. Suggests a host
    // component is hitting the resume path. Figure out why. Possibly
    // related to `hidden`.

    var updatePayload = prepareUpdate(instance, type, oldProps, newProps, rootContainerInstance, currentHostContext); // TODO: Type this specific to this type of component.

    workInProgress.updateQueue = updatePayload; // If the update payload indicates that there is a change or if there
    // is a new ref we mark this as an update. All the work is done in commitWork.

    if (updatePayload) {
      markUpdate(workInProgress);
    }
  };

  updateHostText$1 = function (current, workInProgress, oldText, newText) {
    // If the text differs, mark it as an update. All the work in done in commitWork.
    if (oldText !== newText) {
      markUpdate(workInProgress);
    }
  };
} else if (supportsPersistence) {
  // Persistent host tree mode
  appendAllChildren = function (parent, workInProgress, needsVisibilityToggle, isHidden) {
    // We only have the top Fiber that was created but we need recurse down its
    // children to find all the terminal nodes.
    var node = workInProgress.child;

    while (node !== null) {
      // eslint-disable-next-line no-labels
      branches: if (node.tag === HostComponent) {
        var instance = node.stateNode;

        if (needsVisibilityToggle && isHidden) {
          // This child is inside a timed out tree. Hide it.
          var props = node.memoizedProps;
          var type = node.type;
          instance = cloneHiddenInstance(instance, type, props, node);
        }

        appendInitialChild(parent, instance);
      } else if (node.tag === HostText) {
        var _instance = node.stateNode;

        if (needsVisibilityToggle && isHidden) {
          // This child is inside a timed out tree. Hide it.
          var text = node.memoizedProps;
          _instance = cloneHiddenTextInstance(_instance, text, node);
        }

        appendInitialChild(parent, _instance);
      } else if (enableFundamentalAPI && node.tag === FundamentalComponent) {
        var _instance2 = node.stateNode.instance;

        if (needsVisibilityToggle && isHidden) {
          // This child is inside a timed out tree. Hide it.
          var _props = node.memoizedProps;
          var _type = node.type;
          _instance2 = cloneHiddenInstance(_instance2, _type, _props, node);
        }

        appendInitialChild(parent, _instance2);
      } else if (node.tag === HostPortal) {// If we have a portal child, then we don't want to traverse
        // down its children. Instead, we'll get insertions from each child in
        // the portal directly.
      } else if (node.tag === SuspenseComponent) {
        if ((node.effectTag & Update) !== NoEffect) {
          // Need to toggle the visibility of the primary children.
          var newIsHidden = node.memoizedState !== null;

          if (newIsHidden) {
            var primaryChildParent = node.child;

            if (primaryChildParent !== null) {
              if (primaryChildParent.child !== null) {
                primaryChildParent.child.return = primaryChildParent;
                appendAllChildren(parent, primaryChildParent, true, newIsHidden);
              }

              var fallbackChildParent = primaryChildParent.sibling;

              if (fallbackChildParent !== null) {
                fallbackChildParent.return = node;
                node = fallbackChildParent;
                continue;
              }
            }
          }
        }

        if (node.child !== null) {
          // Continue traversing like normal
          node.child.return = node;
          node = node.child;
          continue;
        }
      } else if (node.child !== null) {
        node.child.return = node;
        node = node.child;
        continue;
      } // $FlowFixMe This is correct but Flow is confused by the labeled break.


      node = node;

      if (node === workInProgress) {
        return;
      }

      while (node.sibling === null) {
        if (node.return === null || node.return === workInProgress) {
          return;
        }

        node = node.return;
      }

      node.sibling.return = node.return;
      node = node.sibling;
    }
  }; // An unfortunate fork of appendAllChildren because we have two different parent types.


  var appendAllChildrenToContainer = function (containerChildSet, workInProgress, needsVisibilityToggle, isHidden) {
    // We only have the top Fiber that was created but we need recurse down its
    // children to find all the terminal nodes.
    var node = workInProgress.child;

    while (node !== null) {
      // eslint-disable-next-line no-labels
      branches: if (node.tag === HostComponent) {
        var instance = node.stateNode;

        if (needsVisibilityToggle && isHidden) {
          // This child is inside a timed out tree. Hide it.
          var props = node.memoizedProps;
          var type = node.type;
          instance = cloneHiddenInstance(instance, type, props, node);
        }

        appendChildToContainerChildSet(containerChildSet, instance);
      } else if (node.tag === HostText) {
        var _instance3 = node.stateNode;

        if (needsVisibilityToggle && isHidden) {
          // This child is inside a timed out tree. Hide it.
          var text = node.memoizedProps;
          _instance3 = cloneHiddenTextInstance(_instance3, text, node);
        }

        appendChildToContainerChildSet(containerChildSet, _instance3);
      } else if (enableFundamentalAPI && node.tag === FundamentalComponent) {
        var _instance4 = node.stateNode.instance;

        if (needsVisibilityToggle && isHidden) {
          // This child is inside a timed out tree. Hide it.
          var _props2 = node.memoizedProps;
          var _type2 = node.type;
          _instance4 = cloneHiddenInstance(_instance4, _type2, _props2, node);
        }

        appendChildToContainerChildSet(containerChildSet, _instance4);
      } else if (node.tag === HostPortal) {// If we have a portal child, then we don't want to traverse
        // down its children. Instead, we'll get insertions from each child in
        // the portal directly.
      } else if (node.tag === SuspenseComponent) {
        if ((node.effectTag & Update) !== NoEffect) {
          // Need to toggle the visibility of the primary children.
          var newIsHidden = node.memoizedState !== null;

          if (newIsHidden) {
            var primaryChildParent = node.child;

            if (primaryChildParent !== null) {
              if (primaryChildParent.child !== null) {
                primaryChildParent.child.return = primaryChildParent;
                appendAllChildrenToContainer(containerChildSet, primaryChildParent, true, newIsHidden);
              }

              var fallbackChildParent = primaryChildParent.sibling;

              if (fallbackChildParent !== null) {
                fallbackChildParent.return = node;
                node = fallbackChildParent;
                continue;
              }
            }
          }
        }

        if (node.child !== null) {
          // Continue traversing like normal
          node.child.return = node;
          node = node.child;
          continue;
        }
      } else if (node.child !== null) {
        node.child.return = node;
        node = node.child;
        continue;
      } // $FlowFixMe This is correct but Flow is confused by the labeled break.


      node = node;

      if (node === workInProgress) {
        return;
      }

      while (node.sibling === null) {
        if (node.return === null || node.return === workInProgress) {
          return;
        }

        node = node.return;
      }

      node.sibling.return = node.return;
      node = node.sibling;
    }
  };

  updateHostContainer = function (workInProgress) {
    var portalOrRoot = workInProgress.stateNode;
    var childrenUnchanged = workInProgress.firstEffect === null;

    if (childrenUnchanged) {// No changes, just reuse the existing instance.
    } else {
      var container = portalOrRoot.containerInfo;
      var newChildSet = createContainerChildSet(container); // If children might have changed, we have to add them all to the set.

      appendAllChildrenToContainer(newChildSet, workInProgress, false, false);
      portalOrRoot.pendingChildren = newChildSet; // Schedule an update on the container to swap out the container.

      markUpdate(workInProgress);
      finalizeContainerChildren(container, newChildSet);
    }
  };

  updateHostComponent$1 = function (current, workInProgress, type, newProps, rootContainerInstance) {
    var currentInstance = current.stateNode;
    var oldProps = current.memoizedProps; // If there are no effects associated with this node, then none of our children had any updates.
    // This guarantees that we can reuse all of them.

    var childrenUnchanged = workInProgress.firstEffect === null;

    if (childrenUnchanged && oldProps === newProps) {
      // No changes, just reuse the existing instance.
      // Note that this might release a previous clone.
      workInProgress.stateNode = currentInstance;
      return;
    }

    var recyclableInstance = workInProgress.stateNode;
    var currentHostContext = getHostContext();
    var updatePayload = null;

    if (oldProps !== newProps) {
      updatePayload = prepareUpdate(recyclableInstance, type, oldProps, newProps, rootContainerInstance, currentHostContext);
    }

    if (childrenUnchanged && updatePayload === null) {
      // No changes, just reuse the existing instance.
      // Note that this might release a previous clone.
      workInProgress.stateNode = currentInstance;
      return;
    }

    var newInstance = cloneInstance(currentInstance, updatePayload, type, oldProps, newProps, workInProgress, childrenUnchanged, recyclableInstance);

    if (finalizeInitialChildren(newInstance, type, newProps, rootContainerInstance, currentHostContext)) {
      markUpdate(workInProgress);
    }

    workInProgress.stateNode = newInstance;

    if (childrenUnchanged) {
      // If there are no other effects in this tree, we need to flag this node as having one.
      // Even though we're not going to use it for anything.
      // Otherwise parents won't know that there are new children to propagate upwards.
      markUpdate(workInProgress);
    } else {
      // If children might have changed, we have to add them all to the set.
      appendAllChildren(newInstance, workInProgress, false, false);
    }
  };

  updateHostText$1 = function (current, workInProgress, oldText, newText) {
    if (oldText !== newText) {
      // If the text content differs, we'll create a new text instance for it.
      var rootContainerInstance = getRootHostContainer();
      var currentHostContext = getHostContext();
      workInProgress.stateNode = createTextInstance(newText, rootContainerInstance, currentHostContext, workInProgress); // We'll have to mark it as having an effect, even though we won't use the effect for anything.
      // This lets the parents know that at least one of their children has changed.

      markUpdate(workInProgress);
    }
  };
} else {
  // No host operations
  updateHostContainer = function (workInProgress) {// Noop
  };

  updateHostComponent$1 = function (current, workInProgress, type, newProps, rootContainerInstance) {// Noop
  };

  updateHostText$1 = function (current, workInProgress, oldText, newText) {// Noop
  };
}

function cutOffTailIfNeeded(renderState, hasRenderedATailFallback) {
  switch (renderState.tailMode) {
    case 'hidden':
      {
        // Any insertions at the end of the tail list after this point
        // should be invisible. If there are already mounted boundaries
        // anything before them are not considered for collapsing.
        // Therefore we need to go through the whole tail to find if
        // there are any.
        var tailNode = renderState.tail;
        var lastTailNode = null;

        while (tailNode !== null) {
          if (tailNode.alternate !== null) {
            lastTailNode = tailNode;
          }

          tailNode = tailNode.sibling;
        } // Next we're simply going to delete all insertions after the
        // last rendered item.


        if (lastTailNode === null) {
          // All remaining items in the tail are insertions.
          renderState.tail = null;
        } else {
          // Detach the insertion after the last node that was already
          // inserted.
          lastTailNode.sibling = null;
        }

        break;
      }

    case 'collapsed':
      {
        // Any insertions at the end of the tail list after this point
        // should be invisible. If there are already mounted boundaries
        // anything before them are not considered for collapsing.
        // Therefore we need to go through the whole tail to find if
        // there are any.
        var _tailNode = renderState.tail;
        var _lastTailNode = null;

        while (_tailNode !== null) {
          if (_tailNode.alternate !== null) {
            _lastTailNode = _tailNode;
          }

          _tailNode = _tailNode.sibling;
        } // Next we're simply going to delete all insertions after the
        // last rendered item.


        if (_lastTailNode === null) {
          // All remaining items in the tail are insertions.
          if (!hasRenderedATailFallback && renderState.tail !== null) {
            // We suspended during the head. We want to show at least one
            // row at the tail. So we'll keep on and cut off the rest.
            renderState.tail.sibling = null;
          } else {
            renderState.tail = null;
          }
        } else {
          // Detach the insertion after the last node that was already
          // inserted.
          _lastTailNode.sibling = null;
        }

        break;
      }
  }
}

function completeWork(current, workInProgress, renderExpirationTime) {
  var newProps = workInProgress.pendingProps;

  switch (workInProgress.tag) {
    case IndeterminateComponent:
      break;

    case LazyComponent:
      break;

    case SimpleMemoComponent:
    case FunctionComponent:
      break;

    case ClassComponent:
      {
        var Component = workInProgress.type;

        if (isContextProvider(Component)) {
          popContext(workInProgress);
        }

        break;
      }

    case HostRoot:
      {
        popHostContainer(workInProgress);
        popTopLevelContextObject(workInProgress);
        var fiberRoot = workInProgress.stateNode;

        if (fiberRoot.pendingContext) {
          fiberRoot.context = fiberRoot.pendingContext;
          fiberRoot.pendingContext = null;
        }

        if (current === null || current.child === null) {
          // If we hydrated, pop so that we can delete any remaining children
          // that weren't hydrated.
          var wasHydrated = popHydrationState(workInProgress);

          if (wasHydrated) {
            // If we hydrated, then we'll need to schedule an update for
            // the commit side-effects on the root.
            markUpdate(workInProgress);
          }
        }

        updateHostContainer(workInProgress);
        break;
      }

    case HostComponent:
      {
        popHostContext(workInProgress);
        var rootContainerInstance = getRootHostContainer();
        var type = workInProgress.type;

        if (current !== null && workInProgress.stateNode != null) {
          updateHostComponent$1(current, workInProgress, type, newProps, rootContainerInstance);

          if (enableFlareAPI) {
            var prevListeners = current.memoizedProps.listeners;
            var nextListeners = newProps.listeners;

            if (prevListeners !== nextListeners) {
              markUpdate(workInProgress);
            }
          }

          if (current.ref !== workInProgress.ref) {
            markRef$1(workInProgress);
          }
        } else {
          if (!newProps) {
            if (!(workInProgress.stateNode !== null)) {
              {
                throw Error("We must have new props for new mounts. This error is likely caused by a bug in React. Please file an issue.");
              }
            } // This can happen when we abort work.


            break;
          }

          var currentHostContext = getHostContext(); // TODO: Move createInstance to beginWork and keep it on a context
          // "stack" as the parent. Then append children as we go in beginWork
          // or completeWork depending on we want to add then top->down or
          // bottom->up. Top->down is faster in IE11.

          var _wasHydrated = popHydrationState(workInProgress);

          if (_wasHydrated) {
            // TODO: Move this and createInstance step into the beginPhase
            // to consolidate.
            if (prepareToHydrateHostInstance(workInProgress, rootContainerInstance, currentHostContext)) {
              // If changes to the hydrated node needs to be applied at the
              // commit-phase we mark this as such.
              markUpdate(workInProgress);
            }

            if (enableFlareAPI) {
              var listeners = newProps.listeners;

              if (listeners != null) {
                updateEventListeners(listeners, workInProgress, rootContainerInstance);
              }
            }
          } else {
            var instance = createInstance(type, newProps, rootContainerInstance, currentHostContext, workInProgress);
            appendAllChildren(instance, workInProgress, false, false); // This needs to be set before we mount Flare event listeners

            workInProgress.stateNode = instance;

            if (enableFlareAPI) {
              var _listeners = newProps.listeners;

              if (_listeners != null) {
                updateEventListeners(_listeners, workInProgress, rootContainerInstance);
              }
            } // Certain renderers require commit-time effects for initial mount.
            // (eg DOM renderer supports auto-focus for certain elements).
            // Make sure such renderers get scheduled for later work.


            if (finalizeInitialChildren(instance, type, newProps, rootContainerInstance, currentHostContext)) {
              markUpdate(workInProgress);
            }
          }

          if (workInProgress.ref !== null) {
            // If there is a ref on a host node we need to schedule a callback
            markRef$1(workInProgress);
          }
        }

        break;
      }

    case HostText:
      {
        var newText = newProps;

        if (current && workInProgress.stateNode != null) {
          var oldText = current.memoizedProps; // If we have an alternate, that means this is an update and we need
          // to schedule a side-effect to do the updates.

          updateHostText$1(current, workInProgress, oldText, newText);
        } else {
          if (typeof newText !== 'string') {
            if (!(workInProgress.stateNode !== null)) {
              {
                throw Error("We must have new props for new mounts. This error is likely caused by a bug in React. Please file an issue.");
              }
            } // This can happen when we abort work.

          }

          var _rootContainerInstance = getRootHostContainer();

          var _currentHostContext = getHostContext();

          var _wasHydrated2 = popHydrationState(workInProgress);

          if (_wasHydrated2) {
            if (prepareToHydrateHostTextInstance(workInProgress)) {
              markUpdate(workInProgress);
            }
          } else {
            workInProgress.stateNode = createTextInstance(newText, _rootContainerInstance, _currentHostContext, workInProgress);
          }
        }

        break;
      }

    case ForwardRef:
      break;

    case SuspenseComponent:
      {
        popSuspenseContext(workInProgress);
        var nextState = workInProgress.memoizedState;

        if (enableSuspenseServerRenderer) {
          if (nextState !== null && nextState.dehydrated !== null) {
            if (current === null) {
              var _wasHydrated3 = popHydrationState(workInProgress);

              if (!_wasHydrated3) {
                {
                  throw Error("A dehydrated suspense component was completed without a hydrated node. This is probably a bug in React.");
                }
              }

              prepareToHydrateHostSuspenseInstance(workInProgress);

              if (enableSchedulerTracing) {
                markSpawnedWork(Never);
              }

              return null;
            } else {
              // We should never have been in a hydration state if we didn't have a current.
              // However, in some of those paths, we might have reentered a hydration state
              // and then we might be inside a hydration state. In that case, we'll need to
              // exit out of it.
              resetHydrationState();

              if ((workInProgress.effectTag & DidCapture) === NoEffect) {
                // This boundary did not suspend so it's now hydrated and unsuspended.
                workInProgress.memoizedState = null;
              } // If nothing suspended, we need to schedule an effect to mark this boundary
              // as having hydrated so events know that they're free be invoked.
              // It's also a signal to replay events and the suspense callback.
              // If something suspended, schedule an effect to attach retry listeners.
              // So we might as well always mark this.


              workInProgress.effectTag |= Update;
              return null;
            }
          }
        }

        if ((workInProgress.effectTag & DidCapture) !== NoEffect) {
          // Something suspended. Re-render with the fallback children.
          workInProgress.expirationTime = renderExpirationTime; // Do not reset the effect list.

          return workInProgress;
        }

        var nextDidTimeout = nextState !== null;
        var prevDidTimeout = false;

        if (current === null) {
          if (workInProgress.memoizedProps.fallback !== undefined) {
            popHydrationState(workInProgress);
          }
        } else {
          var prevState = current.memoizedState;
          prevDidTimeout = prevState !== null;

          if (!nextDidTimeout && prevState !== null) {
            // We just switched from the fallback to the normal children.
            // Delete the fallback.
            // TODO: Would it be better to store the fallback fragment on
            // the stateNode during the begin phase?
            var currentFallbackChild = current.child.sibling;

            if (currentFallbackChild !== null) {
              // Deletions go at the beginning of the return fiber's effect list
              var first = workInProgress.firstEffect;

              if (first !== null) {
                workInProgress.firstEffect = currentFallbackChild;
                currentFallbackChild.nextEffect = first;
              } else {
                workInProgress.firstEffect = workInProgress.lastEffect = currentFallbackChild;
                currentFallbackChild.nextEffect = null;
              }

              currentFallbackChild.effectTag = Deletion;
            }
          }
        }

        if (nextDidTimeout && !prevDidTimeout) {
          // If this subtreee is running in batched mode we can suspend,
          // otherwise we won't suspend.
          // TODO: This will still suspend a synchronous tree if anything
          // in the concurrent tree already suspended during this render.
          // This is a known bug.
          if ((workInProgress.mode & BatchedMode) !== NoMode) {
            // TODO: Move this back to throwException because this is too late
            // if this is a large tree which is common for initial loads. We
            // don't know if we should restart a render or not until we get
            // this marker, and this is too late.
            // If this render already had a ping or lower pri updates,
            // and this is the first time we know we're going to suspend we
            // should be able to immediately restart from within throwException.
            var hasInvisibleChildContext = current === null && workInProgress.memoizedProps.unstable_avoidThisFallback !== true;

            if (hasInvisibleChildContext || hasSuspenseContext(suspenseStackCursor.current, InvisibleParentSuspenseContext)) {
              // If this was in an invisible tree or a new render, then showing
              // this boundary is ok.
              renderDidSuspend();
            } else {
              // Otherwise, we're going to have to hide content so we should
              // suspend for longer if possible.
              renderDidSuspendDelayIfPossible();
            }
          }
        }

        if (supportsPersistence) {
          // TODO: Only schedule updates if not prevDidTimeout.
          if (nextDidTimeout) {
            // If this boundary just timed out, schedule an effect to attach a
            // retry listener to the proimse. This flag is also used to hide the
            // primary children.
            workInProgress.effectTag |= Update;
          }
        }

        if (supportsMutation) {
          // TODO: Only schedule updates if these values are non equal, i.e. it changed.
          if (nextDidTimeout || prevDidTimeout) {
            // If this boundary just timed out, schedule an effect to attach a
            // retry listener to the proimse. This flag is also used to hide the
            // primary children. In mutation mode, we also need the flag to
            // *unhide* children that were previously hidden, so check if the
            // is currently timed out, too.
            workInProgress.effectTag |= Update;
          }
        }

        if (enableSuspenseCallback && workInProgress.updateQueue !== null && workInProgress.memoizedProps.suspenseCallback != null) {
          // Always notify the callback
          workInProgress.effectTag |= Update;
        }

        break;
      }

    case Fragment:
      break;

    case Mode:
      break;

    case Profiler:
      break;

    case HostPortal:
      popHostContainer(workInProgress);
      updateHostContainer(workInProgress);
      break;

    case ContextProvider:
      // Pop provider fiber
      popProvider(workInProgress);
      break;

    case ContextConsumer:
      break;

    case MemoComponent:
      break;

    case IncompleteClassComponent:
      {
        // Same as class component case. I put it down here so that the tags are
        // sequential to ensure this switch is compiled to a jump table.
        var _Component = workInProgress.type;

        if (isContextProvider(_Component)) {
          popContext(workInProgress);
        }

        break;
      }

    case SuspenseListComponent:
      {
        popSuspenseContext(workInProgress);
        var renderState = workInProgress.memoizedState;

        if (renderState === null) {
          // We're running in the default, "independent" mode. We don't do anything
          // in this mode.
          break;
        }

        var didSuspendAlready = (workInProgress.effectTag & DidCapture) !== NoEffect;
        var renderedTail = renderState.rendering;

        if (renderedTail === null) {
          // We just rendered the head.
          if (!didSuspendAlready) {
            // This is the first pass. We need to figure out if anything is still
            // suspended in the rendered set.
            // If new content unsuspended, but there's still some content that
            // didn't. Then we need to do a second pass that forces everything
            // to keep showing their fallbacks.
            // We might be suspended if something in this render pass suspended, or
            // something in the previous committed pass suspended. Otherwise,
            // there's no chance so we can skip the expensive call to
            // findFirstSuspended.
            var cannotBeSuspended = renderHasNotSuspendedYet() && (current === null || (current.effectTag & DidCapture) === NoEffect);

            if (!cannotBeSuspended) {
              var row = workInProgress.child;

              while (row !== null) {
                var suspended = findFirstSuspended(row);

                if (suspended !== null) {
                  didSuspendAlready = true;
                  workInProgress.effectTag |= DidCapture;
                  cutOffTailIfNeeded(renderState, false); // If this is a newly suspended tree, it might not get committed as
                  // part of the second pass. In that case nothing will subscribe to
                  // its thennables. Instead, we'll transfer its thennables to the
                  // SuspenseList so that it can retry if they resolve.
                  // There might be multiple of these in the list but since we're
                  // going to wait for all of them anyway, it doesn't really matter
                  // which ones gets to ping. In theory we could get clever and keep
                  // track of how many dependencies remain but it gets tricky because
                  // in the meantime, we can add/remove/change items and dependencies.
                  // We might bail out of the loop before finding any but that
                  // doesn't matter since that means that the other boundaries that
                  // we did find already has their listeners attached.

                  var newThennables = suspended.updateQueue;

                  if (newThennables !== null) {
                    workInProgress.updateQueue = newThennables;
                    workInProgress.effectTag |= Update;
                  } // Rerender the whole list, but this time, we'll force fallbacks
                  // to stay in place.
                  // Reset the effect list before doing the second pass since that's now invalid.


                  if (renderState.lastEffect === null) {
                    workInProgress.firstEffect = null;
                  }

                  workInProgress.lastEffect = renderState.lastEffect; // Reset the child fibers to their original state.

                  resetChildFibers(workInProgress, renderExpirationTime); // Set up the Suspense Context to force suspense and immediately
                  // rerender the children.

                  pushSuspenseContext(workInProgress, setShallowSuspenseContext(suspenseStackCursor.current, ForceSuspenseFallback));
                  return workInProgress.child;
                }

                row = row.sibling;
              }
            }
          } else {
            cutOffTailIfNeeded(renderState, false);
          } // Next we're going to render the tail.

        } else {
          // Append the rendered row to the child list.
          if (!didSuspendAlready) {
            var _suspended = findFirstSuspended(renderedTail);

            if (_suspended !== null) {
              workInProgress.effectTag |= DidCapture;
              didSuspendAlready = true; // Ensure we transfer the update queue to the parent so that it doesn't
              // get lost if this row ends up dropped during a second pass.

              var _newThennables = _suspended.updateQueue;

              if (_newThennables !== null) {
                workInProgress.updateQueue = _newThennables;
                workInProgress.effectTag |= Update;
              }

              cutOffTailIfNeeded(renderState, true); // This might have been modified.

              if (renderState.tail === null && renderState.tailMode === 'hidden') {
                // We need to delete the row we just rendered.
                // Reset the effect list to what it w as before we rendered this
                // child. The nested children have already appended themselves.
                var lastEffect = workInProgress.lastEffect = renderState.lastEffect; // Remove any effects that were appended after this point.

                if (lastEffect !== null) {
                  lastEffect.nextEffect = null;
                } // We're done.


                return null;
              }
            } else if (now() > renderState.tailExpiration && renderExpirationTime > Never) {
              // We have now passed our CPU deadline and we'll just give up further
              // attempts to render the main content and only render fallbacks.
              // The assumption is that this is usually faster.
              workInProgress.effectTag |= DidCapture;
              didSuspendAlready = true;
              cutOffTailIfNeeded(renderState, false); // Since nothing actually suspended, there will nothing to ping this
              // to get it started back up to attempt the next item. If we can show
              // them, then they really have the same priority as this render.
              // So we'll pick it back up the very next render pass once we've had
              // an opportunity to yield for paint.

              var nextPriority = renderExpirationTime - 1;
              workInProgress.expirationTime = workInProgress.childExpirationTime = nextPriority;

              if (enableSchedulerTracing) {
                markSpawnedWork(nextPriority);
              }
            }
          }

          if (renderState.isBackwards) {
            // The effect list of the backwards tail will have been added
            // to the end. This breaks the guarantee that life-cycles fire in
            // sibling order but that isn't a strong guarantee promised by React.
            // Especially since these might also just pop in during future commits.
            // Append to the beginning of the list.
            renderedTail.sibling = workInProgress.child;
            workInProgress.child = renderedTail;
          } else {
            var previousSibling = renderState.last;

            if (previousSibling !== null) {
              previousSibling.sibling = renderedTail;
            } else {
              workInProgress.child = renderedTail;
            }

            renderState.last = renderedTail;
          }
        }

        if (renderState.tail !== null) {
          // We still have tail rows to render.
          if (renderState.tailExpiration === 0) {
            // Heuristic for how long we're willing to spend rendering rows
            // until we just give up and show what we have so far.
            var TAIL_EXPIRATION_TIMEOUT_MS = 500;
            renderState.tailExpiration = now() + TAIL_EXPIRATION_TIMEOUT_MS;
          } // Pop a row.


          var next = renderState.tail;
          renderState.rendering = next;
          renderState.tail = next.sibling;
          renderState.lastEffect = workInProgress.lastEffect;
          next.sibling = null; // Restore the context.
          // TODO: We can probably just avoid popping it instead and only
          // setting it the first time we go from not suspended to suspended.

          var suspenseContext = suspenseStackCursor.current;

          if (didSuspendAlready) {
            suspenseContext = setShallowSuspenseContext(suspenseContext, ForceSuspenseFallback);
          } else {
            suspenseContext = setDefaultShallowSuspenseContext(suspenseContext);
          }

          pushSuspenseContext(workInProgress, suspenseContext); // Do a pass over the next row.

          return next;
        }

        break;
      }

    case FundamentalComponent:
      {
        if (enableFundamentalAPI) {
          var fundamentalImpl = workInProgress.type.impl;
          var fundamentalInstance = workInProgress.stateNode;

          if (fundamentalInstance === null) {
            var getInitialState = fundamentalImpl.getInitialState;
            var fundamentalState;

            if (getInitialState !== undefined) {
              fundamentalState = getInitialState(newProps);
            }

            fundamentalInstance = workInProgress.stateNode = createFundamentalStateInstance(workInProgress, newProps, fundamentalImpl, fundamentalState || {});

            var _instance5 = getFundamentalComponentInstance(fundamentalInstance);

            fundamentalInstance.instance = _instance5;

            if (fundamentalImpl.reconcileChildren === false) {
              return null;
            }

            appendAllChildren(_instance5, workInProgress, false, false);
            mountFundamentalComponent(fundamentalInstance);
          } else {
            // We fire update in commit phase
            var prevProps = fundamentalInstance.props;
            fundamentalInstance.prevProps = prevProps;
            fundamentalInstance.props = newProps;
            fundamentalInstance.currentFiber = workInProgress;

            if (supportsPersistence) {
              var _instance6 = cloneFundamentalInstance(fundamentalInstance);

              fundamentalInstance.instance = _instance6;
              appendAllChildren(_instance6, workInProgress, false, false);
            }

            var shouldUpdate = shouldUpdateFundamentalComponent(fundamentalInstance);

            if (shouldUpdate) {
              markUpdate(workInProgress);
            }
          }
        }

        break;
      }

    case ScopeComponent:
      {
        if (enableScopeAPI) {
          if (current === null) {
            var _type3 = workInProgress.type;
            var scopeInstance = {
              fiber: workInProgress,
              methods: null
            };
            workInProgress.stateNode = scopeInstance;
            scopeInstance.methods = createScopeMethods(_type3, scopeInstance);

            if (enableFlareAPI) {
              var _listeners2 = newProps.listeners;

              if (_listeners2 != null) {
                var _rootContainerInstance2 = getRootHostContainer();

                updateEventListeners(_listeners2, workInProgress, _rootContainerInstance2);
              }
            }

            if (workInProgress.ref !== null) {
              markRef$1(workInProgress);
              markUpdate(workInProgress);
            }
          } else {
            if (enableFlareAPI) {
              var _prevListeners = current.memoizedProps.listeners;
              var _nextListeners = newProps.listeners;

              if (_prevListeners !== _nextListeners || workInProgress.ref !== null) {
                markUpdate(workInProgress);
              }
            } else {
              if (workInProgress.ref !== null) {
                markUpdate(workInProgress);
              }
            }

            if (current.ref !== workInProgress.ref) {
              markRef$1(workInProgress);
            }
          }
        }

        break;
      }

    default:
      {
        {
          throw Error("Unknown unit of work tag (" + workInProgress.tag + "). This error is likely caused by a bug in React. Please file an issue.");
        }
      }

  }

  return null;
}

function unwindWork(workInProgress, renderExpirationTime) {
  switch (workInProgress.tag) {
    case ClassComponent:
      {
        var Component = workInProgress.type;

        if (isContextProvider(Component)) {
          popContext(workInProgress);
        }

        var effectTag = workInProgress.effectTag;

        if (effectTag & ShouldCapture) {
          workInProgress.effectTag = effectTag & ~ShouldCapture | DidCapture;
          return workInProgress;
        }

        return null;
      }

    case HostRoot:
      {
        popHostContainer(workInProgress);
        popTopLevelContextObject(workInProgress);
        var _effectTag = workInProgress.effectTag;

        if (!((_effectTag & DidCapture) === NoEffect)) {
          {
            throw Error("The root failed to unmount after an error. This is likely a bug in React. Please file an issue.");
          }
        }

        workInProgress.effectTag = _effectTag & ~ShouldCapture | DidCapture;
        return workInProgress;
      }

    case HostComponent:
      {
        // TODO: popHydrationState
        popHostContext(workInProgress);
        return null;
      }

    case SuspenseComponent:
      {
        popSuspenseContext(workInProgress);

        if (enableSuspenseServerRenderer) {
          var suspenseState = workInProgress.memoizedState;

          if (suspenseState !== null && suspenseState.dehydrated !== null) {
            if (!(workInProgress.alternate !== null)) {
              {
                throw Error("Threw in newly mounted dehydrated component. This is likely a bug in React. Please file an issue.");
              }
            }

            resetHydrationState();
          }
        }

        var _effectTag2 = workInProgress.effectTag;

        if (_effectTag2 & ShouldCapture) {
          workInProgress.effectTag = _effectTag2 & ~ShouldCapture | DidCapture; // Captured a suspense effect. Re-render the boundary.

          return workInProgress;
        }

        return null;
      }

    case SuspenseListComponent:
      {
        popSuspenseContext(workInProgress); // SuspenseList doesn't actually catch anything. It should've been
        // caught by a nested boundary. If not, it should bubble through.

        return null;
      }

    case HostPortal:
      popHostContainer(workInProgress);
      return null;

    case ContextProvider:
      popProvider(workInProgress);
      return null;

    default:
      return null;
  }
}

function unwindInterruptedWork(interruptedWork) {
  switch (interruptedWork.tag) {
    case ClassComponent:
      {
        var childContextTypes = interruptedWork.type.childContextTypes;

        if (childContextTypes !== null && childContextTypes !== undefined) {
          popContext(interruptedWork);
        }

        break;
      }

    case HostRoot:
      {
        popHostContainer(interruptedWork);
        popTopLevelContextObject(interruptedWork);
        break;
      }

    case HostComponent:
      {
        popHostContext(interruptedWork);
        break;
      }

    case HostPortal:
      popHostContainer(interruptedWork);
      break;

    case SuspenseComponent:
      popSuspenseContext(interruptedWork);
      break;

    case SuspenseListComponent:
      popSuspenseContext(interruptedWork);
      break;

    case ContextProvider:
      popProvider(interruptedWork);
      break;

    default:
      break;
  }
}

function createCapturedValue(value, source) {
  // If the value is an error, call this function immediately after it is thrown
  // so the stack is accurate.
  return {
    value: value,
    source: source,
    stack: getStackByFiberInDevAndProd(source)
  };
}

// This module is forked in different environments.
// By default, return `true` to log errors to the console.
// Forks can return `false` if this isn't desirable.
function showErrorDialog(capturedError) {
  return true;
}

function logCapturedError(capturedError) {
  var logError = showErrorDialog(capturedError); // Allow injected showErrorDialog() to prevent default console.error logging.
  // This enables renderers like ReactNative to better manage redbox behavior.

  if (logError === false) {
    return;
  }

  var error = capturedError.error;

  {
    var componentName = capturedError.componentName,
        componentStack = capturedError.componentStack,
        errorBoundaryName = capturedError.errorBoundaryName,
        errorBoundaryFound = capturedError.errorBoundaryFound,
        willRetry = capturedError.willRetry; // Browsers support silencing uncaught errors by calling
    // `preventDefault()` in window `error` handler.
    // We record this information as an expando on the error.

    if (error != null && error._suppressLogging) {
      if (errorBoundaryFound && willRetry) {
        // The error is recoverable and was silenced.
        // Ignore it and don't print the stack addendum.
        // This is handy for testing error boundaries without noise.
        return;
      } // The error is fatal. Since the silencing might have
      // been accidental, we'll surface it anyway.
      // However, the browser would have silenced the original error
      // so we'll print it first, and then print the stack addendum.


      console.error(error); // For a more detailed description of this block, see:
      // https://github.com/facebook/react/pull/13384
    }

    var componentNameMessage = componentName ? "The above error occurred in the <" + componentName + "> component:" : 'The above error occurred in one of your React components:';
    var errorBoundaryMessage; // errorBoundaryFound check is sufficient; errorBoundaryName check is to satisfy Flow.

    if (errorBoundaryFound && errorBoundaryName) {
      if (willRetry) {
        errorBoundaryMessage = "React will try to recreate this component tree from scratch " + ("using the error boundary you provided, " + errorBoundaryName + ".");
      } else {
        errorBoundaryMessage = "This error was initially handled by the error boundary " + errorBoundaryName + ".\n" + "Recreating the tree from scratch failed so React will unmount the tree.";
      }
    } else {
      errorBoundaryMessage = 'Consider adding an error boundary to your tree to customize error handling behavior.\n' + 'Visit https://fb.me/react-error-boundaries to learn more about error boundaries.';
    }

    var combinedMessage = "" + componentNameMessage + componentStack + "\n\n" + ("" + errorBoundaryMessage); // In development, we provide our own message with just the component stack.
    // We don't include the original error message and JS stack because the browser
    // has already printed it. Even if the application swallows the error, it is still
    // displayed by the browser thanks to the DEV-only fake event trick in ReactErrorUtils.

    console.error(combinedMessage);
  }
}

var didWarnAboutUndefinedSnapshotBeforeUpdate = null;

{
  didWarnAboutUndefinedSnapshotBeforeUpdate = new Set();
}

var PossiblyWeakSet = typeof WeakSet === 'function' ? WeakSet : Set;
function logError(boundary, errorInfo) {
  var source = errorInfo.source;
  var stack = errorInfo.stack;

  if (stack === null && source !== null) {
    stack = getStackByFiberInDevAndProd(source);
  }

  var capturedError = {
    componentName: source !== null ? getComponentName(source.type) : null,
    componentStack: stack !== null ? stack : '',
    error: errorInfo.value,
    errorBoundary: null,
    errorBoundaryName: null,
    errorBoundaryFound: false,
    willRetry: false
  };

  if (boundary !== null && boundary.tag === ClassComponent) {
    capturedError.errorBoundary = boundary.stateNode;
    capturedError.errorBoundaryName = getComponentName(boundary.type);
    capturedError.errorBoundaryFound = true;
    capturedError.willRetry = true;
  }

  try {
    logCapturedError(capturedError);
  } catch (e) {
    // This method must not throw, or React internal state will get messed up.
    // If console.error is overridden, or logCapturedError() shows a dialog that throws,
    // we want to report this error outside of the normal stack as a last resort.
    // https://github.com/facebook/react/issues/13188
    setTimeout(function () {
      throw e;
    });
  }
}

var callComponentWillUnmountWithTimer = function (current$$1, instance) {
  startPhaseTimer(current$$1, 'componentWillUnmount');
  instance.props = current$$1.memoizedProps;
  instance.state = current$$1.memoizedState;
  instance.componentWillUnmount();
  stopPhaseTimer();
}; // Capture errors so they don't interrupt unmounting.


function safelyCallComponentWillUnmount(current$$1, instance) {
  {
    invokeGuardedCallback(null, callComponentWillUnmountWithTimer, null, current$$1, instance);

    if (hasCaughtError()) {
      var unmountError = clearCaughtError();
      captureCommitPhaseError(current$$1, unmountError);
    }
  }
}

function safelyDetachRef(current$$1) {
  var ref = current$$1.ref;

  if (ref !== null) {
    if (typeof ref === 'function') {
      {
        invokeGuardedCallback(null, ref, null, null);

        if (hasCaughtError()) {
          var refError = clearCaughtError();
          captureCommitPhaseError(current$$1, refError);
        }
      }
    } else {
      ref.current = null;
    }
  }
}

function safelyCallDestroy(current$$1, destroy) {
  {
    invokeGuardedCallback(null, destroy, null);

    if (hasCaughtError()) {
      var error = clearCaughtError();
      captureCommitPhaseError(current$$1, error);
    }
  }
}

function commitBeforeMutationLifeCycles(current$$1, finishedWork) {
  switch (finishedWork.tag) {
    case FunctionComponent:
    case ForwardRef:
    case SimpleMemoComponent:
      {
        commitHookEffectList(UnmountSnapshot, NoEffect$1, finishedWork);
        return;
      }

    case ClassComponent:
      {
        if (finishedWork.effectTag & Snapshot) {
          if (current$$1 !== null) {
            var prevProps = current$$1.memoizedProps;
            var prevState = current$$1.memoizedState;
            startPhaseTimer(finishedWork, 'getSnapshotBeforeUpdate');
            var instance = finishedWork.stateNode; // We could update instance props and state here,
            // but instead we rely on them being set during last render.
            // TODO: revisit this when we implement resuming.

            {
              if (finishedWork.type === finishedWork.elementType && !didWarnAboutReassigningProps) {
                !(instance.props === finishedWork.memoizedProps) ? warning$1(false, 'Expected %s props to match memoized props before ' + 'getSnapshotBeforeUpdate. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance') : void 0;
                !(instance.state === finishedWork.memoizedState) ? warning$1(false, 'Expected %s state to match memoized state before ' + 'getSnapshotBeforeUpdate. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance') : void 0;
              }
            }

            var snapshot = instance.getSnapshotBeforeUpdate(finishedWork.elementType === finishedWork.type ? prevProps : resolveDefaultProps(finishedWork.type, prevProps), prevState);

            {
              var didWarnSet = didWarnAboutUndefinedSnapshotBeforeUpdate;

              if (snapshot === undefined && !didWarnSet.has(finishedWork.type)) {
                didWarnSet.add(finishedWork.type);
                warningWithoutStack$1(false, '%s.getSnapshotBeforeUpdate(): A snapshot value (or null) ' + 'must be returned. You have returned undefined.', getComponentName(finishedWork.type));
              }
            }

            instance.__reactInternalSnapshotBeforeUpdate = snapshot;
            stopPhaseTimer();
          }
        }

        return;
      }

    case HostRoot:
    case HostComponent:
    case HostText:
    case HostPortal:
    case IncompleteClassComponent:
      // Nothing to do for these component types
      return;

    default:
      {
        {
          {
            throw Error("This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue.");
          }
        }
      }
  }
}

function commitHookEffectList(unmountTag, mountTag, finishedWork) {
  var updateQueue = finishedWork.updateQueue;
  var lastEffect = updateQueue !== null ? updateQueue.lastEffect : null;

  if (lastEffect !== null) {
    var firstEffect = lastEffect.next;
    var effect = firstEffect;

    do {
      if ((effect.tag & unmountTag) !== NoEffect$1) {
        // Unmount
        var destroy = effect.destroy;
        effect.destroy = undefined;

        if (destroy !== undefined) {
          destroy();
        }
      }

      if ((effect.tag & mountTag) !== NoEffect$1) {
        // Mount
        var create = effect.create;
        effect.destroy = create();

        {
          var _destroy = effect.destroy;

          if (_destroy !== undefined && typeof _destroy !== 'function') {
            var addendum = void 0;

            if (_destroy === null) {
              addendum = ' You returned null. If your effect does not require clean ' + 'up, return undefined (or nothing).';
            } else if (typeof _destroy.then === 'function') {
              addendum = '\n\nIt looks like you wrote useEffect(async () => ...) or returned a Promise. ' + 'Instead, write the async function inside your effect ' + 'and call it immediately:\n\n' + 'useEffect(() => {\n' + '  async function fetchData() {\n' + '    // You can await here\n' + '    const response = await MyAPI.getData(someId);\n' + '    // ...\n' + '  }\n' + '  fetchData();\n' + "}, [someId]); // Or [] if effect doesn't need props or state\n\n" + 'Learn more about data fetching with Hooks: https://fb.me/react-hooks-data-fetching';
            } else {
              addendum = ' You returned: ' + _destroy;
            }

            warningWithoutStack$1(false, 'An effect function must not return anything besides a function, ' + 'which is used for clean-up.%s%s', addendum, getStackByFiberInDevAndProd(finishedWork));
          }
        }
      }

      effect = effect.next;
    } while (effect !== firstEffect);
  }
}

function commitPassiveHookEffects(finishedWork) {
  if ((finishedWork.effectTag & Passive) !== NoEffect) {
    switch (finishedWork.tag) {
      case FunctionComponent:
      case ForwardRef:
      case SimpleMemoComponent:
        {
          commitHookEffectList(UnmountPassive, NoEffect$1, finishedWork);
          commitHookEffectList(NoEffect$1, MountPassive, finishedWork);
          break;
        }

      default:
        break;
    }
  }
}

function commitLifeCycles(finishedRoot, current$$1, finishedWork, committedExpirationTime) {
  switch (finishedWork.tag) {
    case FunctionComponent:
    case ForwardRef:
    case SimpleMemoComponent:
      {
        commitHookEffectList(UnmountLayout, MountLayout, finishedWork);
        break;
      }

    case ClassComponent:
      {
        var instance = finishedWork.stateNode;

        if (finishedWork.effectTag & Update) {
          if (current$$1 === null) {
            startPhaseTimer(finishedWork, 'componentDidMount'); // We could update instance props and state here,
            // but instead we rely on them being set during last render.
            // TODO: revisit this when we implement resuming.

            {
              if (finishedWork.type === finishedWork.elementType && !didWarnAboutReassigningProps) {
                !(instance.props === finishedWork.memoizedProps) ? warning$1(false, 'Expected %s props to match memoized props before ' + 'componentDidMount. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance') : void 0;
                !(instance.state === finishedWork.memoizedState) ? warning$1(false, 'Expected %s state to match memoized state before ' + 'componentDidMount. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance') : void 0;
              }
            }

            instance.componentDidMount();
            stopPhaseTimer();
          } else {
            var prevProps = finishedWork.elementType === finishedWork.type ? current$$1.memoizedProps : resolveDefaultProps(finishedWork.type, current$$1.memoizedProps);
            var prevState = current$$1.memoizedState;
            startPhaseTimer(finishedWork, 'componentDidUpdate'); // We could update instance props and state here,
            // but instead we rely on them being set during last render.
            // TODO: revisit this when we implement resuming.

            {
              if (finishedWork.type === finishedWork.elementType && !didWarnAboutReassigningProps) {
                !(instance.props === finishedWork.memoizedProps) ? warning$1(false, 'Expected %s props to match memoized props before ' + 'componentDidUpdate. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance') : void 0;
                !(instance.state === finishedWork.memoizedState) ? warning$1(false, 'Expected %s state to match memoized state before ' + 'componentDidUpdate. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance') : void 0;
              }
            }

            instance.componentDidUpdate(prevProps, prevState, instance.__reactInternalSnapshotBeforeUpdate);
            stopPhaseTimer();
          }
        }

        var updateQueue = finishedWork.updateQueue;

        if (updateQueue !== null) {
          {
            if (finishedWork.type === finishedWork.elementType && !didWarnAboutReassigningProps) {
              !(instance.props === finishedWork.memoizedProps) ? warning$1(false, 'Expected %s props to match memoized props before ' + 'processing the update queue. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance') : void 0;
              !(instance.state === finishedWork.memoizedState) ? warning$1(false, 'Expected %s state to match memoized state before ' + 'processing the update queue. ' + 'This might either be because of a bug in React, or because ' + 'a component reassigns its own `this.props`. ' + 'Please file an issue.', getComponentName(finishedWork.type) || 'instance') : void 0;
            }
          } // We could update instance props and state here,
          // but instead we rely on them being set during last render.
          // TODO: revisit this when we implement resuming.


          commitUpdateQueue(finishedWork, updateQueue, instance, committedExpirationTime);
        }

        return;
      }

    case HostRoot:
      {
        var _updateQueue = finishedWork.updateQueue;

        if (_updateQueue !== null) {
          var _instance = null;

          if (finishedWork.child !== null) {
            switch (finishedWork.child.tag) {
              case HostComponent:
                _instance = getPublicInstance(finishedWork.child.stateNode);
                break;

              case ClassComponent:
                _instance = finishedWork.child.stateNode;
                break;
            }
          }

          commitUpdateQueue(finishedWork, _updateQueue, _instance, committedExpirationTime);
        }

        return;
      }

    case HostComponent:
      {
        var _instance2 = finishedWork.stateNode; // Renderers may schedule work to be done after host components are mounted
        // (eg DOM renderer may schedule auto-focus for inputs and form controls).
        // These effects should only be committed when components are first mounted,
        // aka when there is no current/alternate.

        if (current$$1 === null && finishedWork.effectTag & Update) {
          var type = finishedWork.type;
          var props = finishedWork.memoizedProps;
          commitMount(_instance2, type, props, finishedWork);
        }

        return;
      }

    case HostText:
      {
        // We have no life-cycles associated with text.
        return;
      }

    case HostPortal:
      {
        // We have no life-cycles associated with portals.
        return;
      }

    case Profiler:
      {
        if (enableProfilerTimer) {
          var onRender = finishedWork.memoizedProps.onRender;

          if (typeof onRender === 'function') {
            if (enableSchedulerTracing) {
              onRender(finishedWork.memoizedProps.id, current$$1 === null ? 'mount' : 'update', finishedWork.actualDuration, finishedWork.treeBaseDuration, finishedWork.actualStartTime, getCommitTime(), finishedRoot.memoizedInteractions);
            } else {
              onRender(finishedWork.memoizedProps.id, current$$1 === null ? 'mount' : 'update', finishedWork.actualDuration, finishedWork.treeBaseDuration, finishedWork.actualStartTime, getCommitTime());
            }
          }
        }

        return;
      }

    case SuspenseComponent:
      {
        commitSuspenseHydrationCallbacks(finishedRoot, finishedWork);
        return;
      }

    case SuspenseListComponent:
    case IncompleteClassComponent:
    case FundamentalComponent:
    case ScopeComponent:
      return;

    default:
      {
        {
          {
            throw Error("This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue.");
          }
        }
      }
  }
}

function hideOrUnhideAllChildren(finishedWork, isHidden) {
  if (supportsMutation) {
    // We only have the top Fiber that was inserted but we need to recurse down its
    // children to find all the terminal nodes.
    var node = finishedWork;

    while (true) {
      if (node.tag === HostComponent) {
        var instance = node.stateNode;

        if (isHidden) {
          hideInstance(instance);
        } else {
          unhideInstance(node.stateNode, node.memoizedProps);
        }
      } else if (node.tag === HostText) {
        var _instance3 = node.stateNode;

        if (isHidden) {
          hideTextInstance(_instance3);
        } else {
          unhideTextInstance(_instance3, node.memoizedProps);
        }
      } else if (node.tag === SuspenseComponent && node.memoizedState !== null && node.memoizedState.dehydrated === null) {
        // Found a nested Suspense component that timed out. Skip over the
        // primary child fragment, which should remain hidden.
        var fallbackChildFragment = node.child.sibling;
        fallbackChildFragment.return = node;
        node = fallbackChildFragment;
        continue;
      } else if (node.child !== null) {
        node.child.return = node;
        node = node.child;
        continue;
      }

      if (node === finishedWork) {
        return;
      }

      while (node.sibling === null) {
        if (node.return === null || node.return === finishedWork) {
          return;
        }

        node = node.return;
      }

      node.sibling.return = node.return;
      node = node.sibling;
    }
  }
}

function commitAttachRef(finishedWork) {
  var ref = finishedWork.ref;

  if (ref !== null) {
    var instance = finishedWork.stateNode;
    var instanceToUse;

    switch (finishedWork.tag) {
      case HostComponent:
        instanceToUse = getPublicInstance(instance);
        break;

      default:
        instanceToUse = instance;
    } // Moved outside to ensure DCE works with this flag


    if (enableScopeAPI && finishedWork.tag === ScopeComponent) {
      instanceToUse = instance.methods;
    }

    if (typeof ref === 'function') {
      ref(instanceToUse);
    } else {
      {
        if (!ref.hasOwnProperty('current')) {
          warningWithoutStack$1(false, 'Unexpected ref object provided for %s. ' + 'Use either a ref-setter function or React.createRef().%s', getComponentName(finishedWork.type), getStackByFiberInDevAndProd(finishedWork));
        }
      }

      ref.current = instanceToUse;
    }
  }
}

function commitDetachRef(current$$1) {
  var currentRef = current$$1.ref;

  if (currentRef !== null) {
    if (typeof currentRef === 'function') {
      currentRef(null);
    } else {
      currentRef.current = null;
    }
  }
} // User-originating errors (lifecycles and refs) should not interrupt
// deletion, so don't let them throw. Host-originating errors should
// interrupt deletion, so it's okay


function commitUnmount(finishedRoot, current$$1, renderPriorityLevel) {
  onCommitUnmount(current$$1);

  switch (current$$1.tag) {
    case FunctionComponent:
    case ForwardRef:
    case MemoComponent:
    case SimpleMemoComponent:
      {
        var updateQueue = current$$1.updateQueue;

        if (updateQueue !== null) {
          var lastEffect = updateQueue.lastEffect;

          if (lastEffect !== null) {
            var firstEffect = lastEffect.next; // When the owner fiber is deleted, the destroy function of a passive
            // effect hook is called during the synchronous commit phase. This is
            // a concession to implementation complexity. Calling it in the
            // passive effect phase (like they usually are, when dependencies
            // change during an update) would require either traversing the
            // children of the deleted fiber again, or including unmount effects
            // as part of the fiber effect list.
            //
            // Because this is during the sync commit phase, we need to change
            // the priority.
            //
            // TODO: Reconsider this implementation trade off.

            var priorityLevel = renderPriorityLevel > NormalPriority ? NormalPriority : renderPriorityLevel;
            runWithPriority$2(priorityLevel, function () {
              var effect = firstEffect;

              do {
                var destroy = effect.destroy;

                if (destroy !== undefined) {
                  safelyCallDestroy(current$$1, destroy);
                }

                effect = effect.next;
              } while (effect !== firstEffect);
            });
          }
        }

        break;
      }

    case ClassComponent:
      {
        safelyDetachRef(current$$1);
        var instance = current$$1.stateNode;

        if (typeof instance.componentWillUnmount === 'function') {
          safelyCallComponentWillUnmount(current$$1, instance);
        }

        return;
      }

    case HostComponent:
      {
        if (enableFlareAPI) {
          var dependencies = current$$1.dependencies;

          if (dependencies !== null) {
            var respondersMap = dependencies.responders;

            if (respondersMap !== null) {
              var responderInstances = Array.from(respondersMap.values());

              for (var i = 0, length = responderInstances.length; i < length; i++) {
                var responderInstance = responderInstances[i];
                unmountResponderInstance(responderInstance);
              }

              dependencies.responders = null;
            }
          }
        }

        safelyDetachRef(current$$1);
        return;
      }

    case HostPortal:
      {
        // TODO: this is recursive.
        // We are also not using this parent because
        // the portal will get pushed immediately.
        if (supportsMutation) {
          unmountHostComponents(finishedRoot, current$$1, renderPriorityLevel);
        } else if (supportsPersistence) {
          emptyPortalContainer(current$$1);
        }

        return;
      }

    case FundamentalComponent:
      {
        if (enableFundamentalAPI) {
          var fundamentalInstance = current$$1.stateNode;

          if (fundamentalInstance !== null) {
            unmountFundamentalComponent(fundamentalInstance);
            current$$1.stateNode = null;
          }
        }

        return;
      }

    case DehydratedFragment:
      {
        if (enableSuspenseCallback) {
          var hydrationCallbacks = finishedRoot.hydrationCallbacks;

          if (hydrationCallbacks !== null) {
            var onDeleted = hydrationCallbacks.onDeleted;

            if (onDeleted) {
              onDeleted(current$$1.stateNode);
            }
          }
        }

        return;
      }

    case ScopeComponent:
      {
        if (enableScopeAPI) {
          safelyDetachRef(current$$1);
        }
      }
  }
}

function commitNestedUnmounts(finishedRoot, root, renderPriorityLevel) {
  // While we're inside a removed host node we don't want to call
  // removeChild on the inner nodes because they're removed by the top
  // call anyway. We also want to call componentWillUnmount on all
  // composites before this host node is removed from the tree. Therefore
  // we do an inner loop while we're still inside the host node.
  var node = root;

  while (true) {
    commitUnmount(finishedRoot, node, renderPriorityLevel); // Visit children because they may contain more composite or host nodes.
    // Skip portals because commitUnmount() currently visits them recursively.

    if (node.child !== null && ( // If we use mutation we drill down into portals using commitUnmount above.
    // If we don't use mutation we drill down into portals here instead.
    !supportsMutation || node.tag !== HostPortal)) {
      node.child.return = node;
      node = node.child;
      continue;
    }

    if (node === root) {
      return;
    }

    while (node.sibling === null) {
      if (node.return === null || node.return === root) {
        return;
      }

      node = node.return;
    }

    node.sibling.return = node.return;
    node = node.sibling;
  }
}

function detachFiber(current$$1) {
  var alternate = current$$1.alternate; // Cut off the return pointers to disconnect it from the tree. Ideally, we
  // should clear the child pointer of the parent alternate to let this
  // get GC:ed but we don't know which for sure which parent is the current
  // one so we'll settle for GC:ing the subtree of this child. This child
  // itself will be GC:ed when the parent updates the next time.

  current$$1.return = null;
  current$$1.child = null;
  current$$1.memoizedState = null;
  current$$1.updateQueue = null;
  current$$1.dependencies = null;
  current$$1.alternate = null;
  current$$1.firstEffect = null;
  current$$1.lastEffect = null;
  current$$1.pendingProps = null;
  current$$1.memoizedProps = null;

  if (alternate !== null) {
    detachFiber(alternate);
  }
}

function emptyPortalContainer(current$$1) {
  if (!supportsPersistence) {
    return;
  }

  var portal = current$$1.stateNode;
  var containerInfo = portal.containerInfo;
  var emptyChildSet = createContainerChildSet(containerInfo);
  replaceContainerChildren(containerInfo, emptyChildSet);
}

function commitContainer(finishedWork) {
  if (!supportsPersistence) {
    return;
  }

  switch (finishedWork.tag) {
    case ClassComponent:
    case HostComponent:
    case HostText:
    case FundamentalComponent:
      {
        return;
      }

    case HostRoot:
    case HostPortal:
      {
        var portalOrRoot = finishedWork.stateNode;
        var containerInfo = portalOrRoot.containerInfo,
            pendingChildren = portalOrRoot.pendingChildren;
        replaceContainerChildren(containerInfo, pendingChildren);
        return;
      }

    default:
      {
        {
          {
            throw Error("This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue.");
          }
        }
      }
  }
}

function getHostParentFiber(fiber) {
  var parent = fiber.return;

  while (parent !== null) {
    if (isHostParent(parent)) {
      return parent;
    }

    parent = parent.return;
  }

  {
    {
      throw Error("Expected to find a host parent. This error is likely caused by a bug in React. Please file an issue.");
    }
  }
}

function isHostParent(fiber) {
  return fiber.tag === HostComponent || fiber.tag === HostRoot || fiber.tag === HostPortal;
}

function getHostSibling(fiber) {
  // We're going to search forward into the tree until we find a sibling host
  // node. Unfortunately, if multiple insertions are done in a row we have to
  // search past them. This leads to exponential search for the next sibling.
  // TODO: Find a more efficient way to do this.
  var node = fiber;

  siblings: while (true) {
    // If we didn't find anything, let's try the next sibling.
    while (node.sibling === null) {
      if (node.return === null || isHostParent(node.return)) {
        // If we pop out of the root or hit the parent the fiber we are the
        // last sibling.
        return null;
      }

      node = node.return;
    }

    node.sibling.return = node.return;
    node = node.sibling;

    while (node.tag !== HostComponent && node.tag !== HostText && node.tag !== DehydratedFragment) {
      // If it is not host node and, we might have a host node inside it.
      // Try to search down until we find one.
      if (node.effectTag & Placement) {
        // If we don't have a child, try the siblings instead.
        continue siblings;
      } // If we don't have a child, try the siblings instead.
      // We also skip portals because they are not part of this host tree.


      if (node.child === null || node.tag === HostPortal) {
        continue siblings;
      } else {
        node.child.return = node;
        node = node.child;
      }
    } // Check if this host node is stable or about to be placed.


    if (!(node.effectTag & Placement)) {
      // Found it!
      return node.stateNode;
    }
  }
}

function commitPlacement(finishedWork) {
  if (!supportsMutation) {
    return;
  } // Recursively insert all host nodes into the parent.


  var parentFiber = getHostParentFiber(finishedWork); // Note: these two variables *must* always be updated together.

  var parent;
  var isContainer;
  var parentStateNode = parentFiber.stateNode;

  switch (parentFiber.tag) {
    case HostComponent:
      parent = parentStateNode;
      isContainer = false;
      break;

    case HostRoot:
      parent = parentStateNode.containerInfo;
      isContainer = true;
      break;

    case HostPortal:
      parent = parentStateNode.containerInfo;
      isContainer = true;
      break;

    case FundamentalComponent:
      if (enableFundamentalAPI) {
        parent = parentStateNode.instance;
        isContainer = false;
      }

    // eslint-disable-next-line-no-fallthrough

    default:
      {
        {
          throw Error("Invalid host parent fiber. This error is likely caused by a bug in React. Please file an issue.");
        }
      }

  }

  if (parentFiber.effectTag & ContentReset) {
    // Reset the text content of the parent before doing any insertions
    resetTextContent(parent); // Clear ContentReset from the effect tag

    parentFiber.effectTag &= ~ContentReset;
  }

  var before = getHostSibling(finishedWork); // We only have the top Fiber that was inserted but we need to recurse down its
  // children to find all the terminal nodes.

  var node = finishedWork;

  while (true) {
    var isHost = node.tag === HostComponent || node.tag === HostText;

    if (isHost || enableFundamentalAPI && node.tag === FundamentalComponent) {
      var stateNode = isHost ? node.stateNode : node.stateNode.instance;

      if (before) {
        if (isContainer) {
          insertInContainerBefore(parent, stateNode, before);
        } else {
          insertBefore(parent, stateNode, before);
        }
      } else {
        if (isContainer) {
          appendChildToContainer(parent, stateNode);
        } else {
          appendChild(parent, stateNode);
        }
      }
    } else if (node.tag === HostPortal) {// If the insertion itself is a portal, then we don't want to traverse
      // down its children. Instead, we'll get insertions from each child in
      // the portal directly.
    } else if (node.child !== null) {
      node.child.return = node;
      node = node.child;
      continue;
    }

    if (node === finishedWork) {
      return;
    }

    while (node.sibling === null) {
      if (node.return === null || node.return === finishedWork) {
        return;
      }

      node = node.return;
    }

    node.sibling.return = node.return;
    node = node.sibling;
  }
}

function unmountHostComponents(finishedRoot, current$$1, renderPriorityLevel) {
  // We only have the top Fiber that was deleted but we need to recurse down its
  // children to find all the terminal nodes.
  var node = current$$1; // Each iteration, currentParent is populated with node's host parent if not
  // currentParentIsValid.

  var currentParentIsValid = false; // Note: these two variables *must* always be updated together.

  var currentParent;
  var currentParentIsContainer;

  while (true) {
    if (!currentParentIsValid) {
      var parent = node.return;

      findParent: while (true) {
        if (!(parent !== null)) {
          {
            throw Error("Expected to find a host parent. This error is likely caused by a bug in React. Please file an issue.");
          }
        }

        var parentStateNode = parent.stateNode;

        switch (parent.tag) {
          case HostComponent:
            currentParent = parentStateNode;
            currentParentIsContainer = false;
            break findParent;

          case HostRoot:
            currentParent = parentStateNode.containerInfo;
            currentParentIsContainer = true;
            break findParent;

          case HostPortal:
            currentParent = parentStateNode.containerInfo;
            currentParentIsContainer = true;
            break findParent;

          case FundamentalComponent:
            if (enableFundamentalAPI) {
              currentParent = parentStateNode.instance;
              currentParentIsContainer = false;
            }

        }

        parent = parent.return;
      }

      currentParentIsValid = true;
    }

    if (node.tag === HostComponent || node.tag === HostText) {
      commitNestedUnmounts(finishedRoot, node, renderPriorityLevel); // After all the children have unmounted, it is now safe to remove the
      // node from the tree.

      if (currentParentIsContainer) {
        removeChildFromContainer(currentParent, node.stateNode);
      } else {
        removeChild(currentParent, node.stateNode);
      } // Don't visit children because we already visited them.

    } else if (enableFundamentalAPI && node.tag === FundamentalComponent) {
      var fundamentalNode = node.stateNode.instance;
      commitNestedUnmounts(finishedRoot, node, renderPriorityLevel); // After all the children have unmounted, it is now safe to remove the
      // node from the tree.

      if (currentParentIsContainer) {
        removeChildFromContainer(currentParent, fundamentalNode);
      } else {
        removeChild(currentParent, fundamentalNode);
      }
    } else if (enableSuspenseServerRenderer && node.tag === DehydratedFragment) {
      if (enableSuspenseCallback) {
        var hydrationCallbacks = finishedRoot.hydrationCallbacks;

        if (hydrationCallbacks !== null) {
          var onDeleted = hydrationCallbacks.onDeleted;

          if (onDeleted) {
            onDeleted(node.stateNode);
          }
        }
      } // Delete the dehydrated suspense boundary and all of its content.


      if (currentParentIsContainer) {
        clearSuspenseBoundaryFromContainer(currentParent, node.stateNode);
      } else {
        clearSuspenseBoundary(currentParent, node.stateNode);
      }
    } else if (node.tag === HostPortal) {
      if (node.child !== null) {
        // When we go into a portal, it becomes the parent to remove from.
        // We will reassign it back when we pop the portal on the way up.
        currentParent = node.stateNode.containerInfo;
        currentParentIsContainer = true; // Visit children because portals might contain host components.

        node.child.return = node;
        node = node.child;
        continue;
      }
    } else {
      commitUnmount(finishedRoot, node, renderPriorityLevel); // Visit children because we may find more host components below.

      if (node.child !== null) {
        node.child.return = node;
        node = node.child;
        continue;
      }
    }

    if (node === current$$1) {
      return;
    }

    while (node.sibling === null) {
      if (node.return === null || node.return === current$$1) {
        return;
      }

      node = node.return;

      if (node.tag === HostPortal) {
        // When we go out of the portal, we need to restore the parent.
        // Since we don't keep a stack of them, we will search for it.
        currentParentIsValid = false;
      }
    }

    node.sibling.return = node.return;
    node = node.sibling;
  }
}

function commitDeletion(finishedRoot, current$$1, renderPriorityLevel) {
  if (supportsMutation) {
    // Recursively delete all host nodes from the parent.
    // Detach refs and call componentWillUnmount() on the whole subtree.
    unmountHostComponents(finishedRoot, current$$1, renderPriorityLevel);
  } else {
    // Detach refs and call componentWillUnmount() on the whole subtree.
    commitNestedUnmounts(finishedRoot, current$$1, renderPriorityLevel);
  }

  detachFiber(current$$1);
}

function commitWork(current$$1, finishedWork) {
  if (!supportsMutation) {
    switch (finishedWork.tag) {
      case FunctionComponent:
      case ForwardRef:
      case MemoComponent:
      case SimpleMemoComponent:
        {
          // Note: We currently never use MountMutation, but useLayout uses
          // UnmountMutation.
          commitHookEffectList(UnmountMutation, MountMutation, finishedWork);
          return;
        }

      case Profiler:
        {
          return;
        }

      case SuspenseComponent:
        {
          commitSuspenseComponent(finishedWork);
          attachSuspenseRetryListeners(finishedWork);
          return;
        }

      case SuspenseListComponent:
        {
          attachSuspenseRetryListeners(finishedWork);
          return;
        }

      case HostRoot:
        {
          if (supportsHydration) {
            var root = finishedWork.stateNode;

            if (root.hydrate) {
              // We've just hydrated. No need to hydrate again.
              root.hydrate = false;
              commitHydratedContainer(root.containerInfo);
            }
          }

          break;
        }
    }

    commitContainer(finishedWork);
    return;
  }

  switch (finishedWork.tag) {
    case FunctionComponent:
    case ForwardRef:
    case MemoComponent:
    case SimpleMemoComponent:
      {
        // Note: We currently never use MountMutation, but useLayout uses
        // UnmountMutation.
        commitHookEffectList(UnmountMutation, MountMutation, finishedWork);
        return;
      }

    case ClassComponent:
      {
        return;
      }

    case HostComponent:
      {
        var instance = finishedWork.stateNode;

        if (instance != null) {
          // Commit the work prepared earlier.
          var newProps = finishedWork.memoizedProps; // For hydration we reuse the update path but we treat the oldProps
          // as the newProps. The updatePayload will contain the real change in
          // this case.

          var oldProps = current$$1 !== null ? current$$1.memoizedProps : newProps;
          var type = finishedWork.type; // TODO: Type the updateQueue to be specific to host components.

          var updatePayload = finishedWork.updateQueue;
          finishedWork.updateQueue = null;

          if (updatePayload !== null) {
            commitUpdate(instance, updatePayload, type, oldProps, newProps, finishedWork);
          }

          if (enableFlareAPI) {
            var prevListeners = oldProps.listeners;
            var nextListeners = newProps.listeners;

            if (prevListeners !== nextListeners) {
              updateEventListeners(nextListeners, finishedWork, null);
            }
          }
        }

        return;
      }

    case HostText:
      {
        if (!(finishedWork.stateNode !== null)) {
          {
            throw Error("This should have a text node initialized. This error is likely caused by a bug in React. Please file an issue.");
          }
        }

        var textInstance = finishedWork.stateNode;
        var newText = finishedWork.memoizedProps; // For hydration we reuse the update path but we treat the oldProps
        // as the newProps. The updatePayload will contain the real change in
        // this case.

        var oldText = current$$1 !== null ? current$$1.memoizedProps : newText;
        commitTextUpdate(textInstance, oldText, newText);
        return;
      }

    case HostRoot:
      {
        if (supportsHydration) {
          var _root = finishedWork.stateNode;

          if (_root.hydrate) {
            // We've just hydrated. No need to hydrate again.
            _root.hydrate = false;
            commitHydratedContainer(_root.containerInfo);
          }
        }

        return;
      }

    case Profiler:
      {
        return;
      }

    case SuspenseComponent:
      {
        commitSuspenseComponent(finishedWork);
        attachSuspenseRetryListeners(finishedWork);
        return;
      }

    case SuspenseListComponent:
      {
        attachSuspenseRetryListeners(finishedWork);
        return;
      }

    case IncompleteClassComponent:
      {
        return;
      }

    case FundamentalComponent:
      {
        if (enableFundamentalAPI) {
          var fundamentalInstance = finishedWork.stateNode;
          updateFundamentalComponent(fundamentalInstance);
        }

        return;
      }

    case ScopeComponent:
      {
        if (enableScopeAPI) {
          var scopeInstance = finishedWork.stateNode;
          scopeInstance.fiber = finishedWork;

          if (enableFlareAPI) {
            var _newProps = finishedWork.memoizedProps;

            var _oldProps = current$$1 !== null ? current$$1.memoizedProps : _newProps;

            var _prevListeners = _oldProps.listeners;
            var _nextListeners = _newProps.listeners;

            if (_prevListeners !== _nextListeners) {
              updateEventListeners(_nextListeners, finishedWork, null);
            }
          }
        }

        return;
      }

    default:
      {
        {
          {
            throw Error("This unit of work tag should not have side-effects. This error is likely caused by a bug in React. Please file an issue.");
          }
        }
      }
  }
}

function commitSuspenseComponent(finishedWork) {
  var newState = finishedWork.memoizedState;
  var newDidTimeout;
  var primaryChildParent = finishedWork;

  if (newState === null) {
    newDidTimeout = false;
  } else {
    newDidTimeout = true;
    primaryChildParent = finishedWork.child;
    markCommitTimeOfFallback();
  }

  if (supportsMutation && primaryChildParent !== null) {
    hideOrUnhideAllChildren(primaryChildParent, newDidTimeout);
  }

  if (enableSuspenseCallback && newState !== null) {
    var suspenseCallback = finishedWork.memoizedProps.suspenseCallback;

    if (typeof suspenseCallback === 'function') {
      var thenables = finishedWork.updateQueue;

      if (thenables !== null) {
        suspenseCallback(new Set(thenables));
      }
    } else {
      if (suspenseCallback !== undefined) {
        warning$1(false, 'Unexpected type for suspenseCallback.');
      }
    }
  }
}

function commitSuspenseHydrationCallbacks(finishedRoot, finishedWork) {
  if (!supportsHydration) {
    return;
  }

  var newState = finishedWork.memoizedState;

  if (newState === null) {
    var current$$1 = finishedWork.alternate;

    if (current$$1 !== null) {
      var prevState = current$$1.memoizedState;

      if (prevState !== null) {
        var suspenseInstance = prevState.dehydrated;

        if (suspenseInstance !== null) {
          commitHydratedSuspenseInstance(suspenseInstance);

          if (enableSuspenseCallback) {
            var hydrationCallbacks = finishedRoot.hydrationCallbacks;

            if (hydrationCallbacks !== null) {
              var onHydrated = hydrationCallbacks.onHydrated;

              if (onHydrated) {
                onHydrated(suspenseInstance);
              }
            }
          }
        }
      }
    }
  }
}

function attachSuspenseRetryListeners(finishedWork) {
  // If this boundary just timed out, then it will have a set of thenables.
  // For each thenable, attach a listener so that when it resolves, React
  // attempts to re-render the boundary in the primary (pre-timeout) state.
  var thenables = finishedWork.updateQueue;

  if (thenables !== null) {
    finishedWork.updateQueue = null;
    var retryCache = finishedWork.stateNode;

    if (retryCache === null) {
      retryCache = finishedWork.stateNode = new PossiblyWeakSet();
    }

    thenables.forEach(function (thenable) {
      // Memoize using the boundary fiber to prevent redundant listeners.
      var retry = resolveRetryThenable.bind(null, finishedWork, thenable);

      if (!retryCache.has(thenable)) {
        if (enableSchedulerTracing) {
          if (thenable.__reactDoNotTraceInteractions !== true) {
            retry = tracing.unstable_wrap(retry);
          }
        }

        retryCache.add(thenable);
        thenable.then(retry, retry);
      }
    });
  }
}

function commitResetTextContent(current$$1) {
  if (!supportsMutation) {
    return;
  }

  resetTextContent(current$$1.stateNode);
}

var PossiblyWeakMap$1 = typeof WeakMap === 'function' ? WeakMap : Map;

function createRootErrorUpdate(fiber, errorInfo, expirationTime) {
  var update = createUpdate(expirationTime, null); // Unmount the root by rendering null.

  update.tag = CaptureUpdate; // Caution: React DevTools currently depends on this property
  // being called "element".

  update.payload = {
    element: null
  };
  var error = errorInfo.value;

  update.callback = function () {
    onUncaughtError(error);
    logError(fiber, errorInfo);
  };

  return update;
}

function createClassErrorUpdate(fiber, errorInfo, expirationTime) {
  var update = createUpdate(expirationTime, null);
  update.tag = CaptureUpdate;
  var getDerivedStateFromError = fiber.type.getDerivedStateFromError;

  if (typeof getDerivedStateFromError === 'function') {
    var error = errorInfo.value;

    update.payload = function () {
      logError(fiber, errorInfo);
      return getDerivedStateFromError(error);
    };
  }

  var inst = fiber.stateNode;

  if (inst !== null && typeof inst.componentDidCatch === 'function') {
    update.callback = function callback() {
      {
        markFailedErrorBoundaryForHotReloading(fiber);
      }

      if (typeof getDerivedStateFromError !== 'function') {
        // To preserve the preexisting retry behavior of error boundaries,
        // we keep track of which ones already failed during this batch.
        // This gets reset before we yield back to the browser.
        // TODO: Warn in strict mode if getDerivedStateFromError is
        // not defined.
        markLegacyErrorBoundaryAsFailed(this); // Only log here if componentDidCatch is the only error boundary method defined

        logError(fiber, errorInfo);
      }

      var error = errorInfo.value;
      var stack = errorInfo.stack;
      this.componentDidCatch(error, {
        componentStack: stack !== null ? stack : ''
      });

      {
        if (typeof getDerivedStateFromError !== 'function') {
          // If componentDidCatch is the only error boundary method defined,
          // then it needs to call setState to recover from errors.
          // If no state update is scheduled then the boundary will swallow the error.
          !(fiber.expirationTime === Sync) ? warningWithoutStack$1(false, '%s: Error boundaries should implement getDerivedStateFromError(). ' + 'In that method, return a state update to display an error message or fallback UI.', getComponentName(fiber.type) || 'Unknown') : void 0;
        }
      }
    };
  } else {
    update.callback = function () {
      markFailedErrorBoundaryForHotReloading(fiber);
    };
  }

  return update;
}

function attachPingListener(root, renderExpirationTime, thenable) {
  // Attach a listener to the promise to "ping" the root and retry. But
  // only if one does not already exist for the current render expiration
  // time (which acts like a "thread ID" here).
  var pingCache = root.pingCache;
  var threadIDs;

  if (pingCache === null) {
    pingCache = root.pingCache = new PossiblyWeakMap$1();
    threadIDs = new Set();
    pingCache.set(thenable, threadIDs);
  } else {
    threadIDs = pingCache.get(thenable);

    if (threadIDs === undefined) {
      threadIDs = new Set();
      pingCache.set(thenable, threadIDs);
    }
  }

  if (!threadIDs.has(renderExpirationTime)) {
    // Memoize using the thread ID to prevent redundant listeners.
    threadIDs.add(renderExpirationTime);
    var ping = pingSuspendedRoot.bind(null, root, thenable, renderExpirationTime);
    thenable.then(ping, ping);
  }
}

function throwException(root, returnFiber, sourceFiber, value, renderExpirationTime) {
  // The source fiber did not complete.
  sourceFiber.effectTag |= Incomplete; // Its effect list is no longer valid.

  sourceFiber.firstEffect = sourceFiber.lastEffect = null;

  if (value !== null && typeof value === 'object' && typeof value.then === 'function') {
    // This is a thenable.
    var thenable = value;
    checkForWrongSuspensePriorityInDEV(sourceFiber);
    var hasInvisibleParentBoundary = hasSuspenseContext(suspenseStackCursor.current, InvisibleParentSuspenseContext); // Schedule the nearest Suspense to re-render the timed out view.

    var _workInProgress = returnFiber;

    do {
      if (_workInProgress.tag === SuspenseComponent && shouldCaptureSuspense(_workInProgress, hasInvisibleParentBoundary)) {
        // Found the nearest boundary.
        // Stash the promise on the boundary fiber. If the boundary times out, we'll
        // attach another listener to flip the boundary back to its normal state.
        var thenables = _workInProgress.updateQueue;

        if (thenables === null) {
          var updateQueue = new Set();
          updateQueue.add(thenable);
          _workInProgress.updateQueue = updateQueue;
        } else {
          thenables.add(thenable);
        } // If the boundary is outside of batched mode, we should *not*
        // suspend the commit. Pretend as if the suspended component rendered
        // null and keep rendering. In the commit phase, we'll schedule a
        // subsequent synchronous update to re-render the Suspense.
        //
        // Note: It doesn't matter whether the component that suspended was
        // inside a batched mode tree. If the Suspense is outside of it, we
        // should *not* suspend the commit.


        if ((_workInProgress.mode & BatchedMode) === NoMode) {
          _workInProgress.effectTag |= DidCapture; // We're going to commit this fiber even though it didn't complete.
          // But we shouldn't call any lifecycle methods or callbacks. Remove
          // all lifecycle effect tags.

          sourceFiber.effectTag &= ~(LifecycleEffectMask | Incomplete);

          if (sourceFiber.tag === ClassComponent) {
            var currentSourceFiber = sourceFiber.alternate;

            if (currentSourceFiber === null) {
              // This is a new mount. Change the tag so it's not mistaken for a
              // completed class component. For example, we should not call
              // componentWillUnmount if it is deleted.
              sourceFiber.tag = IncompleteClassComponent;
            } else {
              // When we try rendering again, we should not reuse the current fiber,
              // since it's known to be in an inconsistent state. Use a force update to
              // prevent a bail out.
              var update = createUpdate(Sync, null);
              update.tag = ForceUpdate;
              enqueueUpdate(sourceFiber, update);
            }
          } // The source fiber did not complete. Mark it with Sync priority to
          // indicate that it still has pending work.


          sourceFiber.expirationTime = Sync; // Exit without suspending.

          return;
        } // Confirmed that the boundary is in a concurrent mode tree. Continue
        // with the normal suspend path.
        //
        // After this we'll use a set of heuristics to determine whether this
        // render pass will run to completion or restart or "suspend" the commit.
        // The actual logic for this is spread out in different places.
        //
        // This first principle is that if we're going to suspend when we complete
        // a root, then we should also restart if we get an update or ping that
        // might unsuspend it, and vice versa. The only reason to suspend is
        // because you think you might want to restart before committing. However,
        // it doesn't make sense to restart only while in the period we're suspended.
        //
        // Restarting too aggressively is also not good because it starves out any
        // intermediate loading state. So we use heuristics to determine when.
        // Suspense Heuristics
        //
        // If nothing threw a Promise or all the same fallbacks are already showing,
        // then don't suspend/restart.
        //
        // If this is an initial render of a new tree of Suspense boundaries and
        // those trigger a fallback, then don't suspend/restart. We want to ensure
        // that we can show the initial loading state as quickly as possible.
        //
        // If we hit a "Delayed" case, such as when we'd switch from content back into
        // a fallback, then we should always suspend/restart. SuspenseConfig applies to
        // this case. If none is defined, JND is used instead.
        //
        // If we're already showing a fallback and it gets "retried", allowing us to show
        // another level, but there's still an inner boundary that would show a fallback,
        // then we suspend/restart for 500ms since the last time we showed a fallback
        // anywhere in the tree. This effectively throttles progressive loading into a
        // consistent train of commits. This also gives us an opportunity to restart to
        // get to the completed state slightly earlier.
        //
        // If there's ambiguity due to batching it's resolved in preference of:
        // 1) "delayed", 2) "initial render", 3) "retry".
        //
        // We want to ensure that a "busy" state doesn't get force committed. We want to
        // ensure that new initial loading states can commit as soon as possible.


        attachPingListener(root, renderExpirationTime, thenable);
        _workInProgress.effectTag |= ShouldCapture;
        _workInProgress.expirationTime = renderExpirationTime;
        return;
      } // This boundary already captured during this render. Continue to the next
      // boundary.


      _workInProgress = _workInProgress.return;
    } while (_workInProgress !== null); // No boundary was found. Fallthrough to error mode.
    // TODO: Use invariant so the message is stripped in prod?


    value = new Error((getComponentName(sourceFiber.type) || 'A React component') + ' suspended while rendering, but no fallback UI was specified.\n' + '\n' + 'Add a <Suspense fallback=...> component higher in the tree to ' + 'provide a loading indicator or placeholder to display.' + getStackByFiberInDevAndProd(sourceFiber));
  } // We didn't find a boundary that could handle this type of exception. Start
  // over and traverse parent path again, this time treating the exception
  // as an error.


  renderDidError();
  value = createCapturedValue(value, sourceFiber);
  var workInProgress = returnFiber;

  do {
    switch (workInProgress.tag) {
      case HostRoot:
        {
          var _errorInfo = value;
          workInProgress.effectTag |= ShouldCapture;
          workInProgress.expirationTime = renderExpirationTime;

          var _update = createRootErrorUpdate(workInProgress, _errorInfo, renderExpirationTime);

          enqueueCapturedUpdate(workInProgress, _update);
          return;
        }

      case ClassComponent:
        // Capture and retry
        var errorInfo = value;
        var ctor = workInProgress.type;
        var instance = workInProgress.stateNode;

        if ((workInProgress.effectTag & DidCapture) === NoEffect && (typeof ctor.getDerivedStateFromError === 'function' || instance !== null && typeof instance.componentDidCatch === 'function' && !isAlreadyFailedLegacyErrorBoundary(instance))) {
          workInProgress.effectTag |= ShouldCapture;
          workInProgress.expirationTime = renderExpirationTime; // Schedule the error boundary to re-render using updated state

          var _update2 = createClassErrorUpdate(workInProgress, errorInfo, renderExpirationTime);

          enqueueCapturedUpdate(workInProgress, _update2);
          return;
        }

        break;

      default:
        break;
    }

    workInProgress = workInProgress.return;
  } while (workInProgress !== null);
}

var ceil = Math.ceil;
var ReactCurrentDispatcher = ReactSharedInternals.ReactCurrentDispatcher;
var ReactCurrentOwner$2 = ReactSharedInternals.ReactCurrentOwner;
var IsSomeRendererActing = ReactSharedInternals.IsSomeRendererActing;
var NoContext =
/*                    */
0;
var BatchedContext =
/*               */
1;
var EventContext =
/*                 */
2;
var DiscreteEventContext =
/*         */
4;
var LegacyUnbatchedContext =
/*       */
8;
var RenderContext =
/*                */
16;
var CommitContext =
/*                */
32;
var RootIncomplete = 0;
var RootFatalErrored = 1;
var RootErrored = 2;
var RootSuspended = 3;
var RootSuspendedWithDelay = 4;
var RootCompleted = 5;
// Describes where we are in the React execution stack
var executionContext = NoContext; // The root we're working on

var workInProgressRoot = null; // The fiber we're working on

var workInProgress = null; // The expiration time we're rendering

var renderExpirationTime = NoWork; // Whether to root completed, errored, suspended, etc.

var workInProgressRootExitStatus = RootIncomplete; // A fatal error, if one is thrown

var workInProgressRootFatalError = null; // Most recent event time among processed updates during this render.
// This is conceptually a time stamp but expressed in terms of an ExpirationTime
// because we deal mostly with expiration times in the hot path, so this avoids
// the conversion happening in the hot path.

var workInProgressRootLatestProcessedExpirationTime = Sync;
var workInProgressRootLatestSuspenseTimeout = Sync;
var workInProgressRootCanSuspendUsingConfig = null; // The work left over by components that were visited during this render. Only
// includes unprocessed updates, not work in bailed out children.

var workInProgressRootNextUnprocessedUpdateTime = NoWork; // If we're pinged while rendering we don't always restart immediately.
// This flag determines if it might be worthwhile to restart if an opportunity
// happens latere.

var workInProgressRootHasPendingPing = false; // The most recent time we committed a fallback. This lets us ensure a train
// model where we don't commit new loading states in too quick succession.

var globalMostRecentFallbackTime = 0;
var FALLBACK_THROTTLE_MS = 500;
var nextEffect = null;
var hasUncaughtError = false;
var firstUncaughtError = null;
var legacyErrorBoundariesThatAlreadyFailed = null;
var rootDoesHavePassiveEffects = false;
var rootWithPendingPassiveEffects = null;
var pendingPassiveEffectsRenderPriority = NoPriority;
var pendingPassiveEffectsExpirationTime = NoWork;
var rootsWithPendingDiscreteUpdates = null; // Use these to prevent an infinite loop of nested updates

var NESTED_UPDATE_LIMIT = 50;
var nestedUpdateCount = 0;
var rootWithNestedUpdates = null;
var NESTED_PASSIVE_UPDATE_LIMIT = 50;
var nestedPassiveUpdateCount = 0;
var interruptedBy = null; // Marks the need to reschedule pending interactions at these expiration times
// during the commit phase. This enables them to be traced across components
// that spawn new work during render. E.g. hidden boundaries, suspended SSR
// hydration or SuspenseList.

var spawnedWorkDuringRender = null; // Expiration times are computed by adding to the current time (the start
// time). However, if two updates are scheduled within the same event, we
// should treat their start times as simultaneous, even if the actual clock
// time has advanced between the first and second call.
// In other words, because expiration times determine how updates are batched,
// we want all updates of like priority that occur within the same event to
// receive the same expiration time. Otherwise we get tearing.

var currentEventTime = NoWork;
function requestCurrentTimeForUpdate() {
  if ((executionContext & (RenderContext | CommitContext)) !== NoContext) {
    // We're inside React, so it's fine to read the actual time.
    return msToExpirationTime(now());
  } // We're not inside React, so we may be in the middle of a browser event.


  if (currentEventTime !== NoWork) {
    // Use the same start time for all updates until we enter React again.
    return currentEventTime;
  } // This is the first update since React yielded. Compute a new start time.


  currentEventTime = msToExpirationTime(now());
  return currentEventTime;
}
function getCurrentTime() {
  return msToExpirationTime(now());
}
function computeExpirationForFiber(currentTime, fiber, suspenseConfig) {
  var mode = fiber.mode;

  if ((mode & BatchedMode) === NoMode) {
    return Sync;
  }

  var priorityLevel = getCurrentPriorityLevel();

  if ((mode & ConcurrentMode) === NoMode) {
    return priorityLevel === ImmediatePriority ? Sync : Batched;
  }

  if ((executionContext & RenderContext) !== NoContext) {
    // Use whatever time we're already rendering
    // TODO: Should there be a way to opt out, like with `runWithPriority`?
    return renderExpirationTime;
  }

  var expirationTime;

  if (suspenseConfig !== null) {
    // Compute an expiration time based on the Suspense timeout.
    expirationTime = computeSuspenseExpiration(currentTime, suspenseConfig.timeoutMs | 0 || LOW_PRIORITY_EXPIRATION);
  } else {
    // Compute an expiration time based on the Scheduler priority.
    switch (priorityLevel) {
      case ImmediatePriority:
        expirationTime = Sync;
        break;

      case UserBlockingPriority$2:
        // TODO: Rename this to computeUserBlockingExpiration
        expirationTime = computeInteractiveExpiration(currentTime);
        break;

      case NormalPriority:
      case LowPriority:
        // TODO: Handle LowPriority
        // TODO: Rename this to... something better.
        expirationTime = computeAsyncExpiration(currentTime);
        break;

      case IdlePriority:
        expirationTime = Idle;
        break;

      default:
        {
          {
            throw Error("Expected a valid priority level");
          }
        }

    }
  } // If we're in the middle of rendering a tree, do not update at the same
  // expiration time that is already rendering.
  // TODO: We shouldn't have to do this if the update is on a different root.
  // Refactor computeExpirationForFiber + scheduleUpdate so we have access to
  // the root when we check for this condition.


  if (workInProgressRoot !== null && expirationTime === renderExpirationTime) {
    // This is a trick to move this update into a separate batch
    expirationTime -= 1;
  }

  return expirationTime;
}
function scheduleUpdateOnFiber(fiber, expirationTime) {
  checkForNestedUpdates();
  warnAboutInvalidUpdatesOnClassComponentsInDEV(fiber);
  var root = markUpdateTimeFromFiberToRoot(fiber, expirationTime);

  if (root === null) {
    warnAboutUpdateOnUnmountedFiberInDEV(fiber);
    return;
  }

  checkForInterruption(fiber, expirationTime);
  recordScheduleUpdate(); // TODO: computeExpirationForFiber also reads the priority. Pass the
  // priority as an argument to that function and this one.

  var priorityLevel = getCurrentPriorityLevel();

  if (expirationTime === Sync) {
    if ( // Check if we're inside unbatchedUpdates
    (executionContext & LegacyUnbatchedContext) !== NoContext && // Check if we're not already rendering
    (executionContext & (RenderContext | CommitContext)) === NoContext) {
      // Register pending interactions on the root to avoid losing traced interaction data.
      schedulePendingInteractions(root, expirationTime); // This is a legacy edge case. The initial mount of a ReactDOM.render-ed
      // root inside of batchedUpdates should be synchronous, but layout updates
      // should be deferred until the end of the batch.

      performSyncWorkOnRoot(root);
    } else {
      ensureRootIsScheduled(root);
      schedulePendingInteractions(root, expirationTime);

      if (executionContext === NoContext) {
        // Flush the synchronous work now, unless we're already working or inside
        // a batch. This is intentionally inside scheduleUpdateOnFiber instead of
        // scheduleCallbackForFiber to preserve the ability to schedule a callback
        // without immediately flushing it. We only do this for user-initiated
        // updates, to preserve historical behavior of sync mode.
        flushSyncCallbackQueue();
      }
    }
  } else {
    ensureRootIsScheduled(root);
    schedulePendingInteractions(root, expirationTime);
  }

  if ((executionContext & DiscreteEventContext) !== NoContext && ( // Only updates at user-blocking priority or greater are considered
  // discrete, even inside a discrete event.
  priorityLevel === UserBlockingPriority$2 || priorityLevel === ImmediatePriority)) {
    // This is the result of a discrete event. Track the lowest priority
    // discrete update per root so we can flush them early, if needed.
    if (rootsWithPendingDiscreteUpdates === null) {
      rootsWithPendingDiscreteUpdates = new Map([[root, expirationTime]]);
    } else {
      var lastDiscreteTime = rootsWithPendingDiscreteUpdates.get(root);

      if (lastDiscreteTime === undefined || lastDiscreteTime > expirationTime) {
        rootsWithPendingDiscreteUpdates.set(root, expirationTime);
      }
    }
  }
}
var scheduleWork = scheduleUpdateOnFiber; // This is split into a separate function so we can mark a fiber with pending
// work without treating it as a typical update that originates from an event;
// e.g. retrying a Suspense boundary isn't an update, but it does schedule work
// on a fiber.

function markUpdateTimeFromFiberToRoot(fiber, expirationTime) {
  // Update the source fiber's expiration time
  if (fiber.expirationTime < expirationTime) {
    fiber.expirationTime = expirationTime;
  }

  var alternate = fiber.alternate;

  if (alternate !== null && alternate.expirationTime < expirationTime) {
    alternate.expirationTime = expirationTime;
  } // Walk the parent path to the root and update the child expiration time.


  var node = fiber.return;
  var root = null;

  if (node === null && fiber.tag === HostRoot) {
    root = fiber.stateNode;
  } else {
    while (node !== null) {
      alternate = node.alternate;

      if (node.childExpirationTime < expirationTime) {
        node.childExpirationTime = expirationTime;

        if (alternate !== null && alternate.childExpirationTime < expirationTime) {
          alternate.childExpirationTime = expirationTime;
        }
      } else if (alternate !== null && alternate.childExpirationTime < expirationTime) {
        alternate.childExpirationTime = expirationTime;
      }

      if (node.return === null && node.tag === HostRoot) {
        root = node.stateNode;
        break;
      }

      node = node.return;
    }
  }

  if (root !== null) {
    if (workInProgressRoot === root) {
      // Received an update to a tree that's in the middle of rendering. Mark
      // that's unprocessed work on this root.
      markUnprocessedUpdateTime(expirationTime);

      if (workInProgressRootExitStatus === RootSuspendedWithDelay) {
        // The root already suspended with a delay, which means this render
        // definitely won't finish. Since we have a new update, let's mark it as
        // suspended now, right before marking the incoming update. This has the
        // effect of interrupting the current render and switching to the update.
        // TODO: This happens to work when receiving an update during the render
        // phase, because of the trick inside computeExpirationForFiber to
        // subtract 1 from `renderExpirationTime` to move it into a
        // separate bucket. But we should probably model it with an exception,
        // using the same mechanism we use to force hydration of a subtree.
        // TODO: This does not account for low pri updates that were already
        // scheduled before the root started rendering. Need to track the next
        // pending expiration time (perhaps by backtracking the return path) and
        // then trigger a restart in the `renderDidSuspendDelayIfPossible` path.
        markRootSuspendedAtTime(root, renderExpirationTime);
      }
    } // Mark that the root has a pending update.


    markRootUpdatedAtTime(root, expirationTime);
  }

  return root;
}

function getNextRootExpirationTimeToWorkOn(root) {
  // Determines the next expiration time that the root should render, taking
  // into account levels that may be suspended, or levels that may have
  // received a ping.
  var lastExpiredTime = root.lastExpiredTime;

  if (lastExpiredTime !== NoWork) {
    return lastExpiredTime;
  } // "Pending" refers to any update that hasn't committed yet, including if it
  // suspended. The "suspended" range is therefore a subset.


  var firstPendingTime = root.firstPendingTime;

  if (!isRootSuspendedAtTime(root, firstPendingTime)) {
    // The highest priority pending time is not suspended. Let's work on that.
    return firstPendingTime;
  } // If the first pending time is suspended, check if there's a lower priority
  // pending level that we know about. Or check if we received a ping. Work
  // on whichever is higher priority.


  var lastPingedTime = root.lastPingedTime;
  var nextKnownPendingLevel = root.nextKnownPendingLevel;
  return lastPingedTime > nextKnownPendingLevel ? lastPingedTime : nextKnownPendingLevel;
} // Use this function to schedule a task for a root. There's only one task per
// root; if a task was already scheduled, we'll check to make sure the
// expiration time of the existing task is the same as the expiration time of
// the next level that the root has work on. This function is called on every
// update, and right before exiting a task.


function ensureRootIsScheduled(root) {
  var lastExpiredTime = root.lastExpiredTime;

  if (lastExpiredTime !== NoWork) {
    // Special case: Expired work should flush synchronously.
    root.callbackExpirationTime = Sync;
    root.callbackPriority = ImmediatePriority;
    root.callbackNode = scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root));
    return;
  }

  var expirationTime = getNextRootExpirationTimeToWorkOn(root);
  var existingCallbackNode = root.callbackNode;

  if (expirationTime === NoWork) {
    // There's nothing to work on.
    if (existingCallbackNode !== null) {
      root.callbackNode = null;
      root.callbackExpirationTime = NoWork;
      root.callbackPriority = NoPriority;
    }

    return;
  } // TODO: If this is an update, we already read the current time. Pass the
  // time as an argument.


  var currentTime = requestCurrentTimeForUpdate();
  var priorityLevel = inferPriorityFromExpirationTime(currentTime, expirationTime); // If there's an existing render task, confirm it has the correct priority and
  // expiration time. Otherwise, we'll cancel it and schedule a new one.

  if (existingCallbackNode !== null) {
    var existingCallbackPriority = root.callbackPriority;
    var existingCallbackExpirationTime = root.callbackExpirationTime;

    if ( // Callback must have the exact same expiration time.
    existingCallbackExpirationTime === expirationTime && // Callback must have greater or equal priority.
    existingCallbackPriority >= priorityLevel) {
      // Existing callback is sufficient.
      return;
    } // Need to schedule a new task.
    // TODO: Instead of scheduling a new task, we should be able to change the
    // priority of the existing one.


    cancelCallback(existingCallbackNode);
  }

  root.callbackExpirationTime = expirationTime;
  root.callbackPriority = priorityLevel;
  var callbackNode;

  if (expirationTime === Sync) {
    // Sync React callbacks are scheduled on a special internal queue
    callbackNode = scheduleSyncCallback(performSyncWorkOnRoot.bind(null, root));
  } else if (disableSchedulerTimeoutBasedOnReactExpirationTime) {
    callbackNode = scheduleCallback(priorityLevel, performConcurrentWorkOnRoot.bind(null, root));
  } else {
    callbackNode = scheduleCallback(priorityLevel, performConcurrentWorkOnRoot.bind(null, root), // Compute a task timeout based on the expiration time. This also affects
    // ordering because tasks are processed in timeout order.
    {
      timeout: expirationTimeToMs(expirationTime) - now()
    });
  }

  root.callbackNode = callbackNode;
} // This is the entry point for every concurrent task, i.e. anything that
// goes through Scheduler.


function performConcurrentWorkOnRoot(root, didTimeout) {
  // Since we know we're in a React event, we can clear the current
  // event time. The next update will compute a new event time.
  currentEventTime = NoWork;

  if (didTimeout) {
    // The render task took too long to complete. Mark the current time as
    // expired to synchronously render all expired work in a single batch.
    var currentTime = requestCurrentTimeForUpdate();
    markRootExpiredAtTime(root, currentTime); // This will schedule a synchronous callback.

    ensureRootIsScheduled(root);
    return null;
  } // Determine the next expiration time to work on, using the fields stored
  // on the root.


  var expirationTime = getNextRootExpirationTimeToWorkOn(root);

  if (expirationTime !== NoWork) {
    var originalCallbackNode = root.callbackNode;

    if (!((executionContext & (RenderContext | CommitContext)) === NoContext)) {
      {
        throw Error("Should not already be working.");
      }
    }

    flushPassiveEffects(); // If the root or expiration time have changed, throw out the existing stack
    // and prepare a fresh one. Otherwise we'll continue where we left off.

    if (root !== workInProgressRoot || expirationTime !== renderExpirationTime) {
      prepareFreshStack(root, expirationTime);
      startWorkOnPendingInteractions(root, expirationTime);
    } // If we have a work-in-progress fiber, it means there's still work to do
    // in this root.


    if (workInProgress !== null) {
      var prevExecutionContext = executionContext;
      executionContext |= RenderContext;
      var prevDispatcher = pushDispatcher(root);
      var prevInteractions = pushInteractions(root);
      startWorkLoopTimer(workInProgress);

      do {
        try {
          workLoopConcurrent();
          break;
        } catch (thrownValue) {
          handleError(root, thrownValue);
        }
      } while (true);

      resetContextDependencies();
      executionContext = prevExecutionContext;
      popDispatcher(prevDispatcher);

      if (enableSchedulerTracing) {
        popInteractions(prevInteractions);
      }

      if (workInProgressRootExitStatus === RootFatalErrored) {
        var fatalError = workInProgressRootFatalError;
        stopInterruptedWorkLoopTimer();
        prepareFreshStack(root, expirationTime);
        markRootSuspendedAtTime(root, expirationTime);
        ensureRootIsScheduled(root);
        throw fatalError;
      }

      if (workInProgress !== null) {
        // There's still work left over. Exit without committing.
        stopInterruptedWorkLoopTimer();
      } else {
        // We now have a consistent tree. The next step is either to commit it,
        // or, if something suspended, wait to commit it after a timeout.
        stopFinishedWorkLoopTimer();
        var finishedWork = root.finishedWork = root.current.alternate;
        root.finishedExpirationTime = expirationTime;
        finishConcurrentRender(root, finishedWork, workInProgressRootExitStatus, expirationTime);
      }

      ensureRootIsScheduled(root);

      if (root.callbackNode === originalCallbackNode) {
        // The task node scheduled for this root is the same one that's
        // currently executed. Need to return a continuation.
        return performConcurrentWorkOnRoot.bind(null, root);
      }
    }
  }

  return null;
}

function finishConcurrentRender(root, finishedWork, exitStatus, expirationTime) {
  // Set this to null to indicate there's no in-progress render.
  workInProgressRoot = null;

  switch (exitStatus) {
    case RootIncomplete:
    case RootFatalErrored:
      {
        {
          {
            throw Error("Root did not complete. This is a bug in React.");
          }
        }
      }
    // Flow knows about invariant, so it complains if I add a break
    // statement, but eslint doesn't know about invariant, so it complains
    // if I do. eslint-disable-next-line no-fallthrough

    case RootErrored:
      {
        // If this was an async render, the error may have happened due to
        // a mutation in a concurrent event. Try rendering one more time,
        // synchronously, to see if the error goes away. If there are
        // lower priority updates, let's include those, too, in case they
        // fix the inconsistency. Render at Idle to include all updates.
        // If it was Idle or Never or some not-yet-invented time, render
        // at that time.
        markRootExpiredAtTime(root, expirationTime > Idle ? Idle : expirationTime); // We assume that this second render pass will be synchronous
        // and therefore not hit this path again.

        break;
      }

    case RootSuspended:
      {
        markRootSuspendedAtTime(root, expirationTime);
        var lastSuspendedTime = root.lastSuspendedTime;

        if (expirationTime === lastSuspendedTime) {
          root.nextKnownPendingLevel = getRemainingExpirationTime(finishedWork);
        }

        flushSuspensePriorityWarningInDEV(); // We have an acceptable loading state. We need to figure out if we
        // should immediately commit it or wait a bit.
        // If we have processed new updates during this render, we may now
        // have a new loading state ready. We want to ensure that we commit
        // that as soon as possible.

        var hasNotProcessedNewUpdates = workInProgressRootLatestProcessedExpirationTime === Sync;

        if (hasNotProcessedNewUpdates && // do not delay if we're inside an act() scope
        !(true && flushSuspenseFallbacksInTests && IsThisRendererActing.current)) {
          // If we have not processed any new updates during this pass, then
          // this is either a retry of an existing fallback state or a
          // hidden tree. Hidden trees shouldn't be batched with other work
          // and after that's fixed it can only be a retry. We're going to
          // throttle committing retries so that we don't show too many
          // loading states too quickly.
          var msUntilTimeout = globalMostRecentFallbackTime + FALLBACK_THROTTLE_MS - now(); // Don't bother with a very short suspense time.

          if (msUntilTimeout > 10) {
            if (workInProgressRootHasPendingPing) {
              var lastPingedTime = root.lastPingedTime;

              if (lastPingedTime === NoWork || lastPingedTime >= expirationTime) {
                // This render was pinged but we didn't get to restart
                // earlier so try restarting now instead.
                root.lastPingedTime = expirationTime;
                prepareFreshStack(root, expirationTime);
                break;
              }
            }

            var nextTime = getNextRootExpirationTimeToWorkOn(root);

            if (nextTime !== NoWork && nextTime !== expirationTime) {
              // There's additional work on this root.
              break;
            }

            if (lastSuspendedTime !== NoWork && lastSuspendedTime !== expirationTime) {
              // We should prefer to render the fallback of at the last
              // suspended level. Ping the last suspended level to try
              // rendering it again.
              root.lastPingedTime = lastSuspendedTime;
              break;
            } // The render is suspended, it hasn't timed out, and there's no
            // lower priority work to do. Instead of committing the fallback
            // immediately, wait for more data to arrive.


            root.timeoutHandle = scheduleTimeout(commitRoot.bind(null, root), msUntilTimeout);
            break;
          }
        } // The work expired. Commit immediately.


        commitRoot(root);
        break;
      }

    case RootSuspendedWithDelay:
      {
        markRootSuspendedAtTime(root, expirationTime);
        var _lastSuspendedTime = root.lastSuspendedTime;

        if (expirationTime === _lastSuspendedTime) {
          root.nextKnownPendingLevel = getRemainingExpirationTime(finishedWork);
        }

        flushSuspensePriorityWarningInDEV();

        if ( // do not delay if we're inside an act() scope
        !(true && flushSuspenseFallbacksInTests && IsThisRendererActing.current)) {
          // We're suspended in a state that should be avoided. We'll try to
          // avoid committing it for as long as the timeouts let us.
          if (workInProgressRootHasPendingPing) {
            var _lastPingedTime = root.lastPingedTime;

            if (_lastPingedTime === NoWork || _lastPingedTime >= expirationTime) {
              // This render was pinged but we didn't get to restart earlier
              // so try restarting now instead.
              root.lastPingedTime = expirationTime;
              prepareFreshStack(root, expirationTime);
              break;
            }
          }

          var _nextTime = getNextRootExpirationTimeToWorkOn(root);

          if (_nextTime !== NoWork && _nextTime !== expirationTime) {
            // There's additional work on this root.
            break;
          }

          if (_lastSuspendedTime !== NoWork && _lastSuspendedTime !== expirationTime) {
            // We should prefer to render the fallback of at the last
            // suspended level. Ping the last suspended level to try
            // rendering it again.
            root.lastPingedTime = _lastSuspendedTime;
            break;
          }

          var _msUntilTimeout;

          if (workInProgressRootLatestSuspenseTimeout !== Sync) {
            // We have processed a suspense config whose expiration time we
            // can use as the timeout.
            _msUntilTimeout = expirationTimeToMs(workInProgressRootLatestSuspenseTimeout) - now();
          } else if (workInProgressRootLatestProcessedExpirationTime === Sync) {
            // This should never normally happen because only new updates
            // cause delayed states, so we should have processed something.
            // However, this could also happen in an offscreen tree.
            _msUntilTimeout = 0;
          } else {
            // If we don't have a suspense config, we're going to use a
            // heuristic to determine how long we can suspend.
            var eventTimeMs = inferTimeFromExpirationTime(workInProgressRootLatestProcessedExpirationTime);
            var currentTimeMs = now();
            var timeUntilExpirationMs = expirationTimeToMs(expirationTime) - currentTimeMs;
            var timeElapsed = currentTimeMs - eventTimeMs;

            if (timeElapsed < 0) {
              // We get this wrong some time since we estimate the time.
              timeElapsed = 0;
            }

            _msUntilTimeout = jnd(timeElapsed) - timeElapsed; // Clamp the timeout to the expiration time. TODO: Once the
            // event time is exact instead of inferred from expiration time
            // we don't need this.

            if (timeUntilExpirationMs < _msUntilTimeout) {
              _msUntilTimeout = timeUntilExpirationMs;
            }
          } // Don't bother with a very short suspense time.


          if (_msUntilTimeout > 10) {
            // The render is suspended, it hasn't timed out, and there's no
            // lower priority work to do. Instead of committing the fallback
            // immediately, wait for more data to arrive.
            root.timeoutHandle = scheduleTimeout(commitRoot.bind(null, root), _msUntilTimeout);
            break;
          }
        } // The work expired. Commit immediately.


        commitRoot(root);
        break;
      }

    case RootCompleted:
      {
        // The work completed. Ready to commit.
        if ( // do not delay if we're inside an act() scope
        !(true && flushSuspenseFallbacksInTests && IsThisRendererActing.current) && workInProgressRootLatestProcessedExpirationTime !== Sync && workInProgressRootCanSuspendUsingConfig !== null) {
          // If we have exceeded the minimum loading delay, which probably
          // means we have shown a spinner already, we might have to suspend
          // a bit longer to ensure that the spinner is shown for
          // enough time.
          var _msUntilTimeout2 = computeMsUntilSuspenseLoadingDelay(workInProgressRootLatestProcessedExpirationTime, expirationTime, workInProgressRootCanSuspendUsingConfig);

          if (_msUntilTimeout2 > 10) {
            markRootSuspendedAtTime(root, expirationTime);
            root.timeoutHandle = scheduleTimeout(commitRoot.bind(null, root), _msUntilTimeout2);
            break;
          }
        }

        commitRoot(root);
        break;
      }

    default:
      {
        {
          {
            throw Error("Unknown root exit status.");
          }
        }
      }
  }
} // This is the entry point for synchronous tasks that don't go
// through Scheduler


function performSyncWorkOnRoot(root) {
  // Check if there's expired work on this root. Otherwise, render at Sync.
  var lastExpiredTime = root.lastExpiredTime;
  var expirationTime = lastExpiredTime !== NoWork ? lastExpiredTime : Sync;

  if (root.finishedExpirationTime === expirationTime) {
    // There's already a pending commit at this expiration time.
    // TODO: This is poorly factored. This case only exists for the
    // batch.commit() API.
    commitRoot(root);
  } else {
    if (!((executionContext & (RenderContext | CommitContext)) === NoContext)) {
      {
        throw Error("Should not already be working.");
      }
    }

    flushPassiveEffects(); // If the root or expiration time have changed, throw out the existing stack
    // and prepare a fresh one. Otherwise we'll continue where we left off.

    if (root !== workInProgressRoot || expirationTime !== renderExpirationTime) {
      prepareFreshStack(root, expirationTime);
      startWorkOnPendingInteractions(root, expirationTime);
    } // If we have a work-in-progress fiber, it means there's still work to do
    // in this root.


    if (workInProgress !== null) {
      var prevExecutionContext = executionContext;
      executionContext |= RenderContext;
      var prevDispatcher = pushDispatcher(root);
      var prevInteractions = pushInteractions(root);
      startWorkLoopTimer(workInProgress);

      do {
        try {
          workLoopSync();
          break;
        } catch (thrownValue) {
          handleError(root, thrownValue);
        }
      } while (true);

      resetContextDependencies();
      executionContext = prevExecutionContext;
      popDispatcher(prevDispatcher);

      if (enableSchedulerTracing) {
        popInteractions(prevInteractions);
      }

      if (workInProgressRootExitStatus === RootFatalErrored) {
        var fatalError = workInProgressRootFatalError;
        stopInterruptedWorkLoopTimer();
        prepareFreshStack(root, expirationTime);
        markRootSuspendedAtTime(root, expirationTime);
        ensureRootIsScheduled(root);
        throw fatalError;
      }

      if (workInProgress !== null) {
        // This is a sync render, so we should have finished the whole tree.
        {
          {
            throw Error("Cannot commit an incomplete root. This error is likely caused by a bug in React. Please file an issue.");
          }
        }
      } else {
        // We now have a consistent tree. Because this is a sync render, we
        // will commit it even if something suspended.
        stopFinishedWorkLoopTimer();
        root.finishedWork = root.current.alternate;
        root.finishedExpirationTime = expirationTime;
        finishSyncRender(root, workInProgressRootExitStatus, expirationTime);
      } // Before exiting, make sure there's a callback scheduled for the next
      // pending level.


      ensureRootIsScheduled(root);
    }
  }

  return null;
}

function finishSyncRender(root, exitStatus, expirationTime) {
  // Set this to null to indicate there's no in-progress render.
  workInProgressRoot = null;

  {
    if (exitStatus === RootSuspended || exitStatus === RootSuspendedWithDelay) {
      flushSuspensePriorityWarningInDEV();
    }
  }

  commitRoot(root);
}

function flushRoot(root, expirationTime) {
  markRootExpiredAtTime(root, expirationTime);
  ensureRootIsScheduled(root);

  if ((executionContext & (RenderContext | CommitContext)) === NoContext) {
    flushSyncCallbackQueue();
  }
}
function flushDiscreteUpdates() {
  // TODO: Should be able to flush inside batchedUpdates, but not inside `act`.
  // However, `act` uses `batchedUpdates`, so there's no way to distinguish
  // those two cases. Need to fix this before exposing flushDiscreteUpdates
  // as a public API.
  if ((executionContext & (BatchedContext | RenderContext | CommitContext)) !== NoContext) {
    if (true && (executionContext & RenderContext) !== NoContext) {
      warning$1(false, 'unstable_flushDiscreteUpdates: Cannot flush updates when React is ' + 'already rendering.');
    } // We're already rendering, so we can't synchronously flush pending work.
    // This is probably a nested event dispatch triggered by a lifecycle/effect,
    // like `el.focus()`. Exit.


    return;
  }

  flushPendingDiscreteUpdates(); // If the discrete updates scheduled passive effects, flush them now so that
  // they fire before the next serial event.

  flushPassiveEffects();
}

function syncUpdates(fn, a, b, c) {
  return runWithPriority$2(ImmediatePriority, fn.bind(null, a, b, c));
}

function flushPendingDiscreteUpdates() {
  if (rootsWithPendingDiscreteUpdates !== null) {
    // For each root with pending discrete updates, schedule a callback to
    // immediately flush them.
    var roots = rootsWithPendingDiscreteUpdates;
    rootsWithPendingDiscreteUpdates = null;
    roots.forEach(function (expirationTime, root) {
      markRootExpiredAtTime(root, expirationTime);
      ensureRootIsScheduled(root);
    }); // Now flush the immediate queue.

    flushSyncCallbackQueue();
  }
}

function batchedUpdates$1(fn, a) {
  var prevExecutionContext = executionContext;
  executionContext |= BatchedContext;

  try {
    return fn(a);
  } finally {
    executionContext = prevExecutionContext;

    if (executionContext === NoContext) {
      // Flush the immediate callbacks that were scheduled during this batch
      flushSyncCallbackQueue();
    }
  }
}
function batchedEventUpdates$1(fn, a) {
  var prevExecutionContext = executionContext;
  executionContext |= EventContext;

  try {
    return fn(a);
  } finally {
    executionContext = prevExecutionContext;

    if (executionContext === NoContext) {
      // Flush the immediate callbacks that were scheduled during this batch
      flushSyncCallbackQueue();
    }
  }
}
function discreteUpdates$1(fn, a, b, c) {
  var prevExecutionContext = executionContext;
  executionContext |= DiscreteEventContext;

  try {
    // Should this
    return runWithPriority$2(UserBlockingPriority$2, fn.bind(null, a, b, c));
  } finally {
    executionContext = prevExecutionContext;

    if (executionContext === NoContext) {
      // Flush the immediate callbacks that were scheduled during this batch
      flushSyncCallbackQueue();
    }
  }
}
function unbatchedUpdates(fn, a) {
  var prevExecutionContext = executionContext;
  executionContext &= ~BatchedContext;
  executionContext |= LegacyUnbatchedContext;

  try {
    return fn(a);
  } finally {
    executionContext = prevExecutionContext;

    if (executionContext === NoContext) {
      // Flush the immediate callbacks that were scheduled during this batch
      flushSyncCallbackQueue();
    }
  }
}
function flushSync(fn, a) {
  if ((executionContext & (RenderContext | CommitContext)) !== NoContext) {
    {
      {
        throw Error("flushSync was called from inside a lifecycle method. It cannot be called when React is already rendering.");
      }
    }
  }

  var prevExecutionContext = executionContext;
  executionContext |= BatchedContext;

  try {
    return runWithPriority$2(ImmediatePriority, fn.bind(null, a));
  } finally {
    executionContext = prevExecutionContext; // Flush the immediate callbacks that were scheduled during this batch.
    // Note that this will happen even if batchedUpdates is higher up
    // the stack.

    flushSyncCallbackQueue();
  }
}
function flushControlled(fn) {
  var prevExecutionContext = executionContext;
  executionContext |= BatchedContext;

  try {
    runWithPriority$2(ImmediatePriority, fn);
  } finally {
    executionContext = prevExecutionContext;

    if (executionContext === NoContext) {
      // Flush the immediate callbacks that were scheduled during this batch
      flushSyncCallbackQueue();
    }
  }
}

function prepareFreshStack(root, expirationTime) {
  root.finishedWork = null;
  root.finishedExpirationTime = NoWork;
  var timeoutHandle = root.timeoutHandle;

  if (timeoutHandle !== noTimeout) {
    // The root previous suspended and scheduled a timeout to commit a fallback
    // state. Now that we have additional work, cancel the timeout.
    root.timeoutHandle = noTimeout; // $FlowFixMe Complains noTimeout is not a TimeoutID, despite the check above

    cancelTimeout(timeoutHandle);
  }

  if (workInProgress !== null) {
    var interruptedWork = workInProgress.return;

    while (interruptedWork !== null) {
      unwindInterruptedWork(interruptedWork);
      interruptedWork = interruptedWork.return;
    }
  }

  workInProgressRoot = root;
  workInProgress = createWorkInProgress(root.current, null, expirationTime);
  renderExpirationTime = expirationTime;
  workInProgressRootExitStatus = RootIncomplete;
  workInProgressRootFatalError = null;
  workInProgressRootLatestProcessedExpirationTime = Sync;
  workInProgressRootLatestSuspenseTimeout = Sync;
  workInProgressRootCanSuspendUsingConfig = null;
  workInProgressRootNextUnprocessedUpdateTime = NoWork;
  workInProgressRootHasPendingPing = false;

  if (enableSchedulerTracing) {
    spawnedWorkDuringRender = null;
  }

  {
    ReactStrictModeWarnings.discardPendingWarnings();
    componentsThatTriggeredHighPriSuspend = null;
  }
}

function handleError(root, thrownValue) {
  do {
    try {
      // Reset module-level state that was set during the render phase.
      resetContextDependencies();
      resetHooks();
      resetCurrentFiber();

      if (workInProgress === null || workInProgress.return === null) {
        // Expected to be working on a non-root fiber. This is a fatal error
        // because there's no ancestor that can handle it; the root is
        // supposed to capture all errors that weren't caught by an error
        // boundary.
        workInProgressRootExitStatus = RootFatalErrored;
        workInProgressRootFatalError = thrownValue;
        return null;
      }

      if (enableProfilerTimer && workInProgress.mode & ProfileMode) {
        // Record the time spent rendering before an error was thrown. This
        // avoids inaccurate Profiler durations in the case of a
        // suspended render.
        stopProfilerTimerIfRunningAndRecordDelta(workInProgress, true);
      }

      throwException(root, workInProgress.return, workInProgress, thrownValue, renderExpirationTime);
      workInProgress = completeUnitOfWork(workInProgress);
    } catch (yetAnotherThrownValue) {
      // Something in the return path also threw.
      thrownValue = yetAnotherThrownValue;
      continue;
    } // Return to the normal work loop.


    return;
  } while (true);
}

function pushDispatcher(root) {
  var prevDispatcher = ReactCurrentDispatcher.current;
  ReactCurrentDispatcher.current = ContextOnlyDispatcher;

  if (prevDispatcher === null) {
    // The React isomorphic package does not include a default dispatcher.
    // Instead the first renderer will lazily attach one, in order to give
    // nicer error messages.
    return ContextOnlyDispatcher;
  } else {
    return prevDispatcher;
  }
}

function popDispatcher(prevDispatcher) {
  ReactCurrentDispatcher.current = prevDispatcher;
}

function pushInteractions(root) {
  if (enableSchedulerTracing) {
    var prevInteractions = tracing.__interactionsRef.current;
    tracing.__interactionsRef.current = root.memoizedInteractions;
    return prevInteractions;
  }

  return null;
}

function popInteractions(prevInteractions) {
  if (enableSchedulerTracing) {
    tracing.__interactionsRef.current = prevInteractions;
  }
}

function markCommitTimeOfFallback() {
  globalMostRecentFallbackTime = now();
}
function markRenderEventTimeAndConfig(expirationTime, suspenseConfig) {
  if (expirationTime < workInProgressRootLatestProcessedExpirationTime && expirationTime > Idle) {
    workInProgressRootLatestProcessedExpirationTime = expirationTime;
  }

  if (suspenseConfig !== null) {
    if (expirationTime < workInProgressRootLatestSuspenseTimeout && expirationTime > Idle) {
      workInProgressRootLatestSuspenseTimeout = expirationTime; // Most of the time we only have one config and getting wrong is not bad.

      workInProgressRootCanSuspendUsingConfig = suspenseConfig;
    }
  }
}
function markUnprocessedUpdateTime(expirationTime) {
  if (expirationTime > workInProgressRootNextUnprocessedUpdateTime) {
    workInProgressRootNextUnprocessedUpdateTime = expirationTime;
  }
}
function renderDidSuspend() {
  if (workInProgressRootExitStatus === RootIncomplete) {
    workInProgressRootExitStatus = RootSuspended;
  }
}
function renderDidSuspendDelayIfPossible() {
  if (workInProgressRootExitStatus === RootIncomplete || workInProgressRootExitStatus === RootSuspended) {
    workInProgressRootExitStatus = RootSuspendedWithDelay;
  } // Check if there's a lower priority update somewhere else in the tree.


  if (workInProgressRootNextUnprocessedUpdateTime !== NoWork && workInProgressRoot !== null) {
    // Mark the current render as suspended, and then mark that there's a
    // pending update.
    // TODO: This should immediately interrupt the current render, instead
    // of waiting until the next time we yield.
    markRootSuspendedAtTime(workInProgressRoot, renderExpirationTime);
    markRootUpdatedAtTime(workInProgressRoot, workInProgressRootNextUnprocessedUpdateTime);
  }
}
function renderDidError() {
  if (workInProgressRootExitStatus !== RootCompleted) {
    workInProgressRootExitStatus = RootErrored;
  }
} // Called during render to determine if anything has suspended.
// Returns false if we're not sure.

function renderHasNotSuspendedYet() {
  // If something errored or completed, we can't really be sure,
  // so those are false.
  return workInProgressRootExitStatus === RootIncomplete;
}

function inferTimeFromExpirationTime(expirationTime) {
  // We don't know exactly when the update was scheduled, but we can infer an
  // approximate start time from the expiration time.
  var earliestExpirationTimeMs = expirationTimeToMs(expirationTime);
  return earliestExpirationTimeMs - LOW_PRIORITY_EXPIRATION;
}

function inferTimeFromExpirationTimeWithSuspenseConfig(expirationTime, suspenseConfig) {
  // We don't know exactly when the update was scheduled, but we can infer an
  // approximate start time from the expiration time by subtracting the timeout
  // that was added to the event time.
  var earliestExpirationTimeMs = expirationTimeToMs(expirationTime);
  return earliestExpirationTimeMs - (suspenseConfig.timeoutMs | 0 || LOW_PRIORITY_EXPIRATION);
} // The work loop is an extremely hot path. Tell Closure not to inline it.

/** @noinline */


function workLoopSync() {
  // Already timed out, so perform work without checking if we need to yield.
  while (workInProgress !== null) {
    workInProgress = performUnitOfWork(workInProgress);
  }
}
/** @noinline */


function workLoopConcurrent() {
  // Perform work until Scheduler asks us to yield
  while (workInProgress !== null && !shouldYield()) {
    workInProgress = performUnitOfWork(workInProgress);
  }
}

function performUnitOfWork(unitOfWork) {
  // The current, flushed, state of this fiber is the alternate. Ideally
  // nothing should rely on this, but relying on it here means that we don't
  // need an additional field on the work in progress.
  var current$$1 = unitOfWork.alternate;
  startWorkTimer(unitOfWork);
  setCurrentFiber(unitOfWork);
  var next;

  if (enableProfilerTimer && (unitOfWork.mode & ProfileMode) !== NoMode) {
    startProfilerTimer(unitOfWork);
    next = beginWork$$1(current$$1, unitOfWork, renderExpirationTime);
    stopProfilerTimerIfRunningAndRecordDelta(unitOfWork, true);
  } else {
    next = beginWork$$1(current$$1, unitOfWork, renderExpirationTime);
  }

  resetCurrentFiber();
  unitOfWork.memoizedProps = unitOfWork.pendingProps;

  if (next === null) {
    // If this doesn't spawn new work, complete the current work.
    next = completeUnitOfWork(unitOfWork);
  }

  ReactCurrentOwner$2.current = null;
  return next;
}

function completeUnitOfWork(unitOfWork) {
  // Attempt to complete the current unit of work, then move to the next
  // sibling. If there are no more siblings, return to the parent fiber.
  workInProgress = unitOfWork;

  do {
    // The current, flushed, state of this fiber is the alternate. Ideally
    // nothing should rely on this, but relying on it here means that we don't
    // need an additional field on the work in progress.
    var current$$1 = workInProgress.alternate;
    var returnFiber = workInProgress.return; // Check if the work completed or if something threw.

    if ((workInProgress.effectTag & Incomplete) === NoEffect) {
      setCurrentFiber(workInProgress);
      var next = void 0;

      if (!enableProfilerTimer || (workInProgress.mode & ProfileMode) === NoMode) {
        next = completeWork(current$$1, workInProgress, renderExpirationTime);
      } else {
        startProfilerTimer(workInProgress);
        next = completeWork(current$$1, workInProgress, renderExpirationTime); // Update render duration assuming we didn't error.

        stopProfilerTimerIfRunningAndRecordDelta(workInProgress, false);
      }

      stopWorkTimer(workInProgress);
      resetCurrentFiber();
      resetChildExpirationTime(workInProgress);

      if (next !== null) {
        // Completing this fiber spawned new work. Work on that next.
        return next;
      }

      if (returnFiber !== null && // Do not append effects to parents if a sibling failed to complete
      (returnFiber.effectTag & Incomplete) === NoEffect) {
        // Append all the effects of the subtree and this fiber onto the effect
        // list of the parent. The completion order of the children affects the
        // side-effect order.
        if (returnFiber.firstEffect === null) {
          returnFiber.firstEffect = workInProgress.firstEffect;
        }

        if (workInProgress.lastEffect !== null) {
          if (returnFiber.lastEffect !== null) {
            returnFiber.lastEffect.nextEffect = workInProgress.firstEffect;
          }

          returnFiber.lastEffect = workInProgress.lastEffect;
        } // If this fiber had side-effects, we append it AFTER the children's
        // side-effects. We can perform certain side-effects earlier if needed,
        // by doing multiple passes over the effect list. We don't want to
        // schedule our own side-effect on our own list because if end up
        // reusing children we'll schedule this effect onto itself since we're
        // at the end.


        var effectTag = workInProgress.effectTag; // Skip both NoWork and PerformedWork tags when creating the effect
        // list. PerformedWork effect is read by React DevTools but shouldn't be
        // committed.

        if (effectTag > PerformedWork) {
          if (returnFiber.lastEffect !== null) {
            returnFiber.lastEffect.nextEffect = workInProgress;
          } else {
            returnFiber.firstEffect = workInProgress;
          }

          returnFiber.lastEffect = workInProgress;
        }
      }
    } else {
      // This fiber did not complete because something threw. Pop values off
      // the stack without entering the complete phase. If this is a boundary,
      // capture values if possible.
      var _next = unwindWork(workInProgress, renderExpirationTime); // Because this fiber did not complete, don't reset its expiration time.


      if (enableProfilerTimer && (workInProgress.mode & ProfileMode) !== NoMode) {
        // Record the render duration for the fiber that errored.
        stopProfilerTimerIfRunningAndRecordDelta(workInProgress, false); // Include the time spent working on failed children before continuing.

        var actualDuration = workInProgress.actualDuration;
        var child = workInProgress.child;

        while (child !== null) {
          actualDuration += child.actualDuration;
          child = child.sibling;
        }

        workInProgress.actualDuration = actualDuration;
      }

      if (_next !== null) {
        // If completing this work spawned new work, do that next. We'll come
        // back here again.
        // Since we're restarting, remove anything that is not a host effect
        // from the effect tag.
        // TODO: The name stopFailedWorkTimer is misleading because Suspense
        // also captures and restarts.
        stopFailedWorkTimer(workInProgress);
        _next.effectTag &= HostEffectMask;
        return _next;
      }

      stopWorkTimer(workInProgress);

      if (returnFiber !== null) {
        // Mark the parent fiber as incomplete and clear its effect list.
        returnFiber.firstEffect = returnFiber.lastEffect = null;
        returnFiber.effectTag |= Incomplete;
      }
    }

    var siblingFiber = workInProgress.sibling;

    if (siblingFiber !== null) {
      // If there is more work to do in this returnFiber, do that next.
      return siblingFiber;
    } // Otherwise, return to the parent


    workInProgress = returnFiber;
  } while (workInProgress !== null); // We've reached the root.


  if (workInProgressRootExitStatus === RootIncomplete) {
    workInProgressRootExitStatus = RootCompleted;
  }

  return null;
}

function getRemainingExpirationTime(fiber) {
  var updateExpirationTime = fiber.expirationTime;
  var childExpirationTime = fiber.childExpirationTime;
  return updateExpirationTime > childExpirationTime ? updateExpirationTime : childExpirationTime;
}

function resetChildExpirationTime(completedWork) {
  if (renderExpirationTime !== Never && completedWork.childExpirationTime === Never) {
    // The children of this component are hidden. Don't bubble their
    // expiration times.
    return;
  }

  var newChildExpirationTime = NoWork; // Bubble up the earliest expiration time.

  if (enableProfilerTimer && (completedWork.mode & ProfileMode) !== NoMode) {
    // In profiling mode, resetChildExpirationTime is also used to reset
    // profiler durations.
    var actualDuration = completedWork.actualDuration;
    var treeBaseDuration = completedWork.selfBaseDuration; // When a fiber is cloned, its actualDuration is reset to 0. This value will
    // only be updated if work is done on the fiber (i.e. it doesn't bailout).
    // When work is done, it should bubble to the parent's actualDuration. If
    // the fiber has not been cloned though, (meaning no work was done), then
    // this value will reflect the amount of time spent working on a previous
    // render. In that case it should not bubble. We determine whether it was
    // cloned by comparing the child pointer.

    var shouldBubbleActualDurations = completedWork.alternate === null || completedWork.child !== completedWork.alternate.child;
    var child = completedWork.child;

    while (child !== null) {
      var childUpdateExpirationTime = child.expirationTime;
      var childChildExpirationTime = child.childExpirationTime;

      if (childUpdateExpirationTime > newChildExpirationTime) {
        newChildExpirationTime = childUpdateExpirationTime;
      }

      if (childChildExpirationTime > newChildExpirationTime) {
        newChildExpirationTime = childChildExpirationTime;
      }

      if (shouldBubbleActualDurations) {
        actualDuration += child.actualDuration;
      }

      treeBaseDuration += child.treeBaseDuration;
      child = child.sibling;
    }

    completedWork.actualDuration = actualDuration;
    completedWork.treeBaseDuration = treeBaseDuration;
  } else {
    var _child = completedWork.child;

    while (_child !== null) {
      var _childUpdateExpirationTime = _child.expirationTime;
      var _childChildExpirationTime = _child.childExpirationTime;

      if (_childUpdateExpirationTime > newChildExpirationTime) {
        newChildExpirationTime = _childUpdateExpirationTime;
      }

      if (_childChildExpirationTime > newChildExpirationTime) {
        newChildExpirationTime = _childChildExpirationTime;
      }

      _child = _child.sibling;
    }
  }

  completedWork.childExpirationTime = newChildExpirationTime;
}

function commitRoot(root) {
  var renderPriorityLevel = getCurrentPriorityLevel();
  runWithPriority$2(ImmediatePriority, commitRootImpl.bind(null, root, renderPriorityLevel));
  return null;
}

function commitRootImpl(root, renderPriorityLevel) {
  flushPassiveEffects();
  flushRenderPhaseStrictModeWarningsInDEV();

  if (!((executionContext & (RenderContext | CommitContext)) === NoContext)) {
    {
      throw Error("Should not already be working.");
    }
  }

  var finishedWork = root.finishedWork;
  var expirationTime = root.finishedExpirationTime;

  if (finishedWork === null) {
    return null;
  }

  root.finishedWork = null;
  root.finishedExpirationTime = NoWork;

  if (!(finishedWork !== root.current)) {
    {
      throw Error("Cannot commit the same tree as before. This error is likely caused by a bug in React. Please file an issue.");
    }
  } // commitRoot never returns a continuation; it always finishes synchronously.
  // So we can clear these now to allow a new callback to be scheduled.


  root.callbackNode = null;
  root.callbackExpirationTime = NoWork;
  root.callbackPriority = NoPriority;
  root.nextKnownPendingLevel = NoWork;
  startCommitTimer(); // Update the first and last pending times on this root. The new first
  // pending time is whatever is left on the root fiber.

  var remainingExpirationTimeBeforeCommit = getRemainingExpirationTime(finishedWork);
  markRootFinishedAtTime(root, expirationTime, remainingExpirationTimeBeforeCommit);

  if (root === workInProgressRoot) {
    // We can reset these now that they are finished.
    workInProgressRoot = null;
    workInProgress = null;
    renderExpirationTime = NoWork;
  } else {} // This indicates that the last root we worked on is not the same one that
  // we're committing now. This most commonly happens when a suspended root
  // times out.
  // Get the list of effects.


  var firstEffect;

  if (finishedWork.effectTag > PerformedWork) {
    // A fiber's effect list consists only of its children, not itself. So if
    // the root has an effect, we need to add it to the end of the list. The
    // resulting list is the set that would belong to the root's parent, if it
    // had one; that is, all the effects in the tree including the root.
    if (finishedWork.lastEffect !== null) {
      finishedWork.lastEffect.nextEffect = finishedWork;
      firstEffect = finishedWork.firstEffect;
    } else {
      firstEffect = finishedWork;
    }
  } else {
    // There is no effect on the root.
    firstEffect = finishedWork.firstEffect;
  }

  if (firstEffect !== null) {
    var prevExecutionContext = executionContext;
    executionContext |= CommitContext;
    var prevInteractions = pushInteractions(root); // Reset this to null before calling lifecycles

    ReactCurrentOwner$2.current = null; // The commit phase is broken into several sub-phases. We do a separate pass
    // of the effect list for each phase: all mutation effects come before all
    // layout effects, and so on.
    // The first phase a "before mutation" phase. We use this phase to read the
    // state of the host tree right before we mutate it. This is where
    // getSnapshotBeforeUpdate is called.

    startCommitSnapshotEffectsTimer();
    prepareForCommit(root.containerInfo);
    nextEffect = firstEffect;

    do {
      {
        invokeGuardedCallback(null, commitBeforeMutationEffects, null);

        if (hasCaughtError()) {
          if (!(nextEffect !== null)) {
            {
              throw Error("Should be working on an effect.");
            }
          }

          var error = clearCaughtError();
          captureCommitPhaseError(nextEffect, error);
          nextEffect = nextEffect.nextEffect;
        }
      }
    } while (nextEffect !== null);

    stopCommitSnapshotEffectsTimer();

    if (enableProfilerTimer) {
      // Mark the current commit time to be shared by all Profilers in this
      // batch. This enables them to be grouped later.
      recordCommitTime();
    } // The next phase is the mutation phase, where we mutate the host tree.


    startCommitHostEffectsTimer();
    nextEffect = firstEffect;

    do {
      {
        invokeGuardedCallback(null, commitMutationEffects, null, root, renderPriorityLevel);

        if (hasCaughtError()) {
          if (!(nextEffect !== null)) {
            {
              throw Error("Should be working on an effect.");
            }
          }

          var _error = clearCaughtError();

          captureCommitPhaseError(nextEffect, _error);
          nextEffect = nextEffect.nextEffect;
        }
      }
    } while (nextEffect !== null);

    stopCommitHostEffectsTimer();
    resetAfterCommit(root.containerInfo); // The work-in-progress tree is now the current tree. This must come after
    // the mutation phase, so that the previous tree is still current during
    // componentWillUnmount, but before the layout phase, so that the finished
    // work is current during componentDidMount/Update.

    root.current = finishedWork; // The next phase is the layout phase, where we call effects that read
    // the host tree after it's been mutated. The idiomatic use case for this is
    // layout, but class component lifecycles also fire here for legacy reasons.

    startCommitLifeCyclesTimer();
    nextEffect = firstEffect;

    do {
      {
        invokeGuardedCallback(null, commitLayoutEffects, null, root, expirationTime);

        if (hasCaughtError()) {
          if (!(nextEffect !== null)) {
            {
              throw Error("Should be working on an effect.");
            }
          }

          var _error2 = clearCaughtError();

          captureCommitPhaseError(nextEffect, _error2);
          nextEffect = nextEffect.nextEffect;
        }
      }
    } while (nextEffect !== null);

    stopCommitLifeCyclesTimer();
    nextEffect = null; // Tell Scheduler to yield at the end of the frame, so the browser has an
    // opportunity to paint.

    requestPaint();

    if (enableSchedulerTracing) {
      popInteractions(prevInteractions);
    }

    executionContext = prevExecutionContext;
  } else {
    // No effects.
    root.current = finishedWork; // Measure these anyway so the flamegraph explicitly shows that there were
    // no effects.
    // TODO: Maybe there's a better way to report this.

    startCommitSnapshotEffectsTimer();
    stopCommitSnapshotEffectsTimer();

    if (enableProfilerTimer) {
      recordCommitTime();
    }

    startCommitHostEffectsTimer();
    stopCommitHostEffectsTimer();
    startCommitLifeCyclesTimer();
    stopCommitLifeCyclesTimer();
  }

  stopCommitTimer();
  var rootDidHavePassiveEffects = rootDoesHavePassiveEffects;

  if (rootDoesHavePassiveEffects) {
    // This commit has passive effects. Stash a reference to them. But don't
    // schedule a callback until after flushing layout work.
    rootDoesHavePassiveEffects = false;
    rootWithPendingPassiveEffects = root;
    pendingPassiveEffectsExpirationTime = expirationTime;
    pendingPassiveEffectsRenderPriority = renderPriorityLevel;
  } else {
    // We are done with the effect chain at this point so let's clear the
    // nextEffect pointers to assist with GC. If we have passive effects, we'll
    // clear this in flushPassiveEffects.
    nextEffect = firstEffect;

    while (nextEffect !== null) {
      var nextNextEffect = nextEffect.nextEffect;
      nextEffect.nextEffect = null;
      nextEffect = nextNextEffect;
    }
  } // Check if there's remaining work on this root


  var remainingExpirationTime = root.firstPendingTime;

  if (remainingExpirationTime !== NoWork) {
    if (enableSchedulerTracing) {
      if (spawnedWorkDuringRender !== null) {
        var expirationTimes = spawnedWorkDuringRender;
        spawnedWorkDuringRender = null;

        for (var i = 0; i < expirationTimes.length; i++) {
          scheduleInteractions(root, expirationTimes[i], root.memoizedInteractions);
        }
      }

      schedulePendingInteractions(root, remainingExpirationTime);
    }
  } else {
    // If there's no remaining work, we can clear the set of already failed
    // error boundaries.
    legacyErrorBoundariesThatAlreadyFailed = null;
  }

  if (enableSchedulerTracing) {
    if (!rootDidHavePassiveEffects) {
      // If there are no passive effects, then we can complete the pending interactions.
      // Otherwise, we'll wait until after the passive effects are flushed.
      // Wait to do this until after remaining work has been scheduled,
      // so that we don't prematurely signal complete for interactions when there's e.g. hidden work.
      finishPendingInteractions(root, expirationTime);
    }
  }

  if (remainingExpirationTime === Sync) {
    // Count the number of times the root synchronously re-renders without
    // finishing. If there are too many, it indicates an infinite update loop.
    if (root === rootWithNestedUpdates) {
      nestedUpdateCount++;
    } else {
      nestedUpdateCount = 0;
      rootWithNestedUpdates = root;
    }
  } else {
    nestedUpdateCount = 0;
  }

  onCommitRoot(finishedWork.stateNode, expirationTime); // Always call this before exiting `commitRoot`, to ensure that any
  // additional work on this root is scheduled.

  ensureRootIsScheduled(root);

  if (hasUncaughtError) {
    hasUncaughtError = false;
    var _error3 = firstUncaughtError;
    firstUncaughtError = null;
    throw _error3;
  }

  if ((executionContext & LegacyUnbatchedContext) !== NoContext) {
    // This is a legacy edge case. We just committed the initial mount of
    // a ReactDOM.render-ed root inside of batchedUpdates. The commit fired
    // synchronously, but layout updates should be deferred until the end
    // of the batch.
    return null;
  } // If layout work was scheduled, flush it now.


  flushSyncCallbackQueue();
  return null;
}

function commitBeforeMutationEffects() {
  while (nextEffect !== null) {
    var effectTag = nextEffect.effectTag;

    if ((effectTag & Snapshot) !== NoEffect) {
      setCurrentFiber(nextEffect);
      recordEffect();
      var current$$1 = nextEffect.alternate;
      commitBeforeMutationLifeCycles(current$$1, nextEffect);
      resetCurrentFiber();
    }

    if ((effectTag & Passive) !== NoEffect) {
      // If there are passive effects, schedule a callback to flush at
      // the earliest opportunity.
      if (!rootDoesHavePassiveEffects) {
        rootDoesHavePassiveEffects = true;
        scheduleCallback(NormalPriority, function () {
          flushPassiveEffects();
          return null;
        });
      }
    }

    nextEffect = nextEffect.nextEffect;
  }
}

function commitMutationEffects(root, renderPriorityLevel) {
  // TODO: Should probably move the bulk of this function to commitWork.
  while (nextEffect !== null) {
    setCurrentFiber(nextEffect);
    var effectTag = nextEffect.effectTag;

    if (effectTag & ContentReset) {
      commitResetTextContent(nextEffect);
    }

    if (effectTag & Ref) {
      var current$$1 = nextEffect.alternate;

      if (current$$1 !== null) {
        commitDetachRef(current$$1);
      }
    } // The following switch statement is only concerned about placement,
    // updates, and deletions. To avoid needing to add a case for every possible
    // bitmap value, we remove the secondary effects from the effect tag and
    // switch on that value.


    var primaryEffectTag = effectTag & (Placement | Update | Deletion | Hydrating);

    switch (primaryEffectTag) {
      case Placement:
        {
          commitPlacement(nextEffect); // Clear the "placement" from effect tag so that we know that this is
          // inserted, before any life-cycles like componentDidMount gets called.
          // TODO: findDOMNode doesn't rely on this any more but isMounted does
          // and isMounted is deprecated anyway so we should be able to kill this.

          nextEffect.effectTag &= ~Placement;
          break;
        }

      case PlacementAndUpdate:
        {
          // Placement
          commitPlacement(nextEffect); // Clear the "placement" from effect tag so that we know that this is
          // inserted, before any life-cycles like componentDidMount gets called.

          nextEffect.effectTag &= ~Placement; // Update

          var _current = nextEffect.alternate;
          commitWork(_current, nextEffect);
          break;
        }

      case Hydrating:
        {
          nextEffect.effectTag &= ~Hydrating;
          break;
        }

      case HydratingAndUpdate:
        {
          nextEffect.effectTag &= ~Hydrating; // Update

          var _current2 = nextEffect.alternate;
          commitWork(_current2, nextEffect);
          break;
        }

      case Update:
        {
          var _current3 = nextEffect.alternate;
          commitWork(_current3, nextEffect);
          break;
        }

      case Deletion:
        {
          commitDeletion(root, nextEffect, renderPriorityLevel);
          break;
        }
    } // TODO: Only record a mutation effect if primaryEffectTag is non-zero.


    recordEffect();
    resetCurrentFiber();
    nextEffect = nextEffect.nextEffect;
  }
}

function commitLayoutEffects(root, committedExpirationTime) {
  // TODO: Should probably move the bulk of this function to commitWork.
  while (nextEffect !== null) {
    setCurrentFiber(nextEffect);
    var effectTag = nextEffect.effectTag;

    if (effectTag & (Update | Callback)) {
      recordEffect();
      var current$$1 = nextEffect.alternate;
      commitLifeCycles(root, current$$1, nextEffect, committedExpirationTime);
    }

    if (effectTag & Ref) {
      recordEffect();
      commitAttachRef(nextEffect);
    }

    resetCurrentFiber();
    nextEffect = nextEffect.nextEffect;
  }
}

function flushPassiveEffects() {
  if (pendingPassiveEffectsRenderPriority !== NoPriority) {
    var priorityLevel = pendingPassiveEffectsRenderPriority > NormalPriority ? NormalPriority : pendingPassiveEffectsRenderPriority;
    pendingPassiveEffectsRenderPriority = NoPriority;
    return runWithPriority$2(priorityLevel, flushPassiveEffectsImpl);
  }
}

function flushPassiveEffectsImpl() {
  if (rootWithPendingPassiveEffects === null) {
    return false;
  }

  var root = rootWithPendingPassiveEffects;
  var expirationTime = pendingPassiveEffectsExpirationTime;
  rootWithPendingPassiveEffects = null;
  pendingPassiveEffectsExpirationTime = NoWork;

  if (!((executionContext & (RenderContext | CommitContext)) === NoContext)) {
    {
      throw Error("Cannot flush passive effects while already rendering.");
    }
  }

  var prevExecutionContext = executionContext;
  executionContext |= CommitContext;
  var prevInteractions = pushInteractions(root); // Note: This currently assumes there are no passive effects on the root
  // fiber, because the root is not part of its own effect list. This could
  // change in the future.

  var effect = root.current.firstEffect;

  while (effect !== null) {
    {
      setCurrentFiber(effect);
      invokeGuardedCallback(null, commitPassiveHookEffects, null, effect);

      if (hasCaughtError()) {
        if (!(effect !== null)) {
          {
            throw Error("Should be working on an effect.");
          }
        }

        var error = clearCaughtError();
        captureCommitPhaseError(effect, error);
      }

      resetCurrentFiber();
    }

    var nextNextEffect = effect.nextEffect; // Remove nextEffect pointer to assist GC

    effect.nextEffect = null;
    effect = nextNextEffect;
  }

  if (enableSchedulerTracing) {
    popInteractions(prevInteractions);
    finishPendingInteractions(root, expirationTime);
  }

  executionContext = prevExecutionContext;
  flushSyncCallbackQueue(); // If additional passive effects were scheduled, increment a counter. If this
  // exceeds the limit, we'll fire a warning.

  nestedPassiveUpdateCount = rootWithPendingPassiveEffects === null ? 0 : nestedPassiveUpdateCount + 1;
  return true;
}

function isAlreadyFailedLegacyErrorBoundary(instance) {
  return legacyErrorBoundariesThatAlreadyFailed !== null && legacyErrorBoundariesThatAlreadyFailed.has(instance);
}
function markLegacyErrorBoundaryAsFailed(instance) {
  if (legacyErrorBoundariesThatAlreadyFailed === null) {
    legacyErrorBoundariesThatAlreadyFailed = new Set([instance]);
  } else {
    legacyErrorBoundariesThatAlreadyFailed.add(instance);
  }
}

function prepareToThrowUncaughtError(error) {
  if (!hasUncaughtError) {
    hasUncaughtError = true;
    firstUncaughtError = error;
  }
}

var onUncaughtError = prepareToThrowUncaughtError;

function captureCommitPhaseErrorOnRoot(rootFiber, sourceFiber, error) {
  var errorInfo = createCapturedValue(error, sourceFiber);
  var update = createRootErrorUpdate(rootFiber, errorInfo, Sync);
  enqueueUpdate(rootFiber, update);
  var root = markUpdateTimeFromFiberToRoot(rootFiber, Sync);

  if (root !== null) {
    ensureRootIsScheduled(root);
    schedulePendingInteractions(root, Sync);
  }
}

function captureCommitPhaseError(sourceFiber, error) {
  if (sourceFiber.tag === HostRoot) {
    // Error was thrown at the root. There is no parent, so the root
    // itself should capture it.
    captureCommitPhaseErrorOnRoot(sourceFiber, sourceFiber, error);
    return;
  }

  var fiber = sourceFiber.return;

  while (fiber !== null) {
    if (fiber.tag === HostRoot) {
      captureCommitPhaseErrorOnRoot(fiber, sourceFiber, error);
      return;
    } else if (fiber.tag === ClassComponent) {
      var ctor = fiber.type;
      var instance = fiber.stateNode;

      if (typeof ctor.getDerivedStateFromError === 'function' || typeof instance.componentDidCatch === 'function' && !isAlreadyFailedLegacyErrorBoundary(instance)) {
        var errorInfo = createCapturedValue(error, sourceFiber);
        var update = createClassErrorUpdate(fiber, errorInfo, // TODO: This is always sync
        Sync);
        enqueueUpdate(fiber, update);
        var root = markUpdateTimeFromFiberToRoot(fiber, Sync);

        if (root !== null) {
          ensureRootIsScheduled(root);
          schedulePendingInteractions(root, Sync);
        }

        return;
      }
    }

    fiber = fiber.return;
  }
}
function pingSuspendedRoot(root, thenable, suspendedTime) {
  var pingCache = root.pingCache;

  if (pingCache !== null) {
    // The thenable resolved, so we no longer need to memoize, because it will
    // never be thrown again.
    pingCache.delete(thenable);
  }

  if (workInProgressRoot === root && renderExpirationTime === suspendedTime) {
    // Received a ping at the same priority level at which we're currently
    // rendering. We might want to restart this render. This should mirror
    // the logic of whether or not a root suspends once it completes.
    // TODO: If we're rendering sync either due to Sync, Batched or expired,
    // we should probably never restart.
    // If we're suspended with delay, we'll always suspend so we can always
    // restart. If we're suspended without any updates, it might be a retry.
    // If it's early in the retry we can restart. We can't know for sure
    // whether we'll eventually process an update during this render pass,
    // but it's somewhat unlikely that we get to a ping before that, since
    // getting to the root most update is usually very fast.
    if (workInProgressRootExitStatus === RootSuspendedWithDelay || workInProgressRootExitStatus === RootSuspended && workInProgressRootLatestProcessedExpirationTime === Sync && now() - globalMostRecentFallbackTime < FALLBACK_THROTTLE_MS) {
      // Restart from the root. Don't need to schedule a ping because
      // we're already working on this tree.
      prepareFreshStack(root, renderExpirationTime);
    } else {
      // Even though we can't restart right now, we might get an
      // opportunity later. So we mark this render as having a ping.
      workInProgressRootHasPendingPing = true;
    }

    return;
  }

  if (!isRootSuspendedAtTime(root, suspendedTime)) {
    // The root is no longer suspended at this time.
    return;
  }

  var lastPingedTime = root.lastPingedTime;

  if (lastPingedTime !== NoWork && lastPingedTime < suspendedTime) {
    // There's already a lower priority ping scheduled.
    return;
  } // Mark the time at which this ping was scheduled.


  root.lastPingedTime = suspendedTime;

  if (root.finishedExpirationTime === suspendedTime) {
    // If there's a pending fallback waiting to commit, throw it away.
    root.finishedExpirationTime = NoWork;
    root.finishedWork = null;
  }

  ensureRootIsScheduled(root);
  schedulePendingInteractions(root, suspendedTime);
}

function retryTimedOutBoundary(boundaryFiber, retryTime) {
  // The boundary fiber (a Suspense component or SuspenseList component)
  // previously was rendered in its fallback state. One of the promises that
  // suspended it has resolved, which means at least part of the tree was
  // likely unblocked. Try rendering again, at a new expiration time.
  if (retryTime === NoWork) {
    var suspenseConfig = null; // Retries don't carry over the already committed update.

    var currentTime = requestCurrentTimeForUpdate();
    retryTime = computeExpirationForFiber(currentTime, boundaryFiber, suspenseConfig);
  } // TODO: Special case idle priority?


  var root = markUpdateTimeFromFiberToRoot(boundaryFiber, retryTime);

  if (root !== null) {
    ensureRootIsScheduled(root);
    schedulePendingInteractions(root, retryTime);
  }
}

function retryDehydratedSuspenseBoundary(boundaryFiber) {
  var suspenseState = boundaryFiber.memoizedState;
  var retryTime = NoWork;

  if (suspenseState !== null) {
    retryTime = suspenseState.retryTime;
  }

  retryTimedOutBoundary(boundaryFiber, retryTime);
}
function resolveRetryThenable(boundaryFiber, thenable) {
  var retryTime = NoWork; // Default

  var retryCache;

  if (enableSuspenseServerRenderer) {
    switch (boundaryFiber.tag) {
      case SuspenseComponent:
        retryCache = boundaryFiber.stateNode;
        var suspenseState = boundaryFiber.memoizedState;

        if (suspenseState !== null) {
          retryTime = suspenseState.retryTime;
        }

        break;

      case SuspenseListComponent:
        retryCache = boundaryFiber.stateNode;
        break;

      default:
        {
          {
            throw Error("Pinged unknown suspense boundary type. This is probably a bug in React.");
          }
        }

    }
  } else {
    retryCache = boundaryFiber.stateNode;
  }

  if (retryCache !== null) {
    // The thenable resolved, so we no longer need to memoize, because it will
    // never be thrown again.
    retryCache.delete(thenable);
  }

  retryTimedOutBoundary(boundaryFiber, retryTime);
} // Computes the next Just Noticeable Difference (JND) boundary.
// The theory is that a person can't tell the difference between small differences in time.
// Therefore, if we wait a bit longer than necessary that won't translate to a noticeable
// difference in the experience. However, waiting for longer might mean that we can avoid
// showing an intermediate loading state. The longer we have already waited, the harder it
// is to tell small differences in time. Therefore, the longer we've already waited,
// the longer we can wait additionally. At some point we have to give up though.
// We pick a train model where the next boundary commits at a consistent schedule.
// These particular numbers are vague estimates. We expect to adjust them based on research.

function jnd(timeElapsed) {
  return timeElapsed < 120 ? 120 : timeElapsed < 480 ? 480 : timeElapsed < 1080 ? 1080 : timeElapsed < 1920 ? 1920 : timeElapsed < 3000 ? 3000 : timeElapsed < 4320 ? 4320 : ceil(timeElapsed / 1960) * 1960;
}

function computeMsUntilSuspenseLoadingDelay(mostRecentEventTime, committedExpirationTime, suspenseConfig) {
  var busyMinDurationMs = suspenseConfig.busyMinDurationMs | 0;

  if (busyMinDurationMs <= 0) {
    return 0;
  }

  var busyDelayMs = suspenseConfig.busyDelayMs | 0; // Compute the time until this render pass would expire.

  var currentTimeMs = now();
  var eventTimeMs = inferTimeFromExpirationTimeWithSuspenseConfig(mostRecentEventTime, suspenseConfig);
  var timeElapsed = currentTimeMs - eventTimeMs;

  if (timeElapsed <= busyDelayMs) {
    // If we haven't yet waited longer than the initial delay, we don't
    // have to wait any additional time.
    return 0;
  }

  var msUntilTimeout = busyDelayMs + busyMinDurationMs - timeElapsed; // This is the value that is passed to `setTimeout`.

  return msUntilTimeout;
}

function checkForNestedUpdates() {
  if (nestedUpdateCount > NESTED_UPDATE_LIMIT) {
    nestedUpdateCount = 0;
    rootWithNestedUpdates = null;

    {
      {
        throw Error("Maximum update depth exceeded. This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate. React limits the number of nested updates to prevent infinite loops.");
      }
    }
  }

  {
    if (nestedPassiveUpdateCount > NESTED_PASSIVE_UPDATE_LIMIT) {
      nestedPassiveUpdateCount = 0;
      warning$1(false, 'Maximum update depth exceeded. This can happen when a component ' + "calls setState inside useEffect, but useEffect either doesn't " + 'have a dependency array, or one of the dependencies changes on ' + 'every render.');
    }
  }
}

function flushRenderPhaseStrictModeWarningsInDEV() {
  {
    ReactStrictModeWarnings.flushLegacyContextWarning();

    if (warnAboutDeprecatedLifecycles) {
      ReactStrictModeWarnings.flushPendingUnsafeLifecycleWarnings();
    }
  }
}

function stopFinishedWorkLoopTimer() {
  var didCompleteRoot = true;
  stopWorkLoopTimer(interruptedBy, didCompleteRoot);
  interruptedBy = null;
}

function stopInterruptedWorkLoopTimer() {
  // TODO: Track which fiber caused the interruption.
  var didCompleteRoot = false;
  stopWorkLoopTimer(interruptedBy, didCompleteRoot);
  interruptedBy = null;
}

function checkForInterruption(fiberThatReceivedUpdate, updateExpirationTime) {
  if (enableUserTimingAPI && workInProgressRoot !== null && updateExpirationTime > renderExpirationTime) {
    interruptedBy = fiberThatReceivedUpdate;
  }
}

var didWarnStateUpdateForUnmountedComponent = null;

function warnAboutUpdateOnUnmountedFiberInDEV(fiber) {
  {
    var tag = fiber.tag;

    if (tag !== HostRoot && tag !== ClassComponent && tag !== FunctionComponent && tag !== ForwardRef && tag !== MemoComponent && tag !== SimpleMemoComponent) {
      // Only warn for user-defined components, not internal ones like Suspense.
      return;
    } // We show the whole stack but dedupe on the top component's name because
    // the problematic code almost always lies inside that component.


    var componentName = getComponentName(fiber.type) || 'ReactComponent';

    if (didWarnStateUpdateForUnmountedComponent !== null) {
      if (didWarnStateUpdateForUnmountedComponent.has(componentName)) {
        return;
      }

      didWarnStateUpdateForUnmountedComponent.add(componentName);
    } else {
      didWarnStateUpdateForUnmountedComponent = new Set([componentName]);
    }

    warningWithoutStack$1(false, "Can't perform a React state update on an unmounted component. This " + 'is a no-op, but it indicates a memory leak in your application. To ' + 'fix, cancel all subscriptions and asynchronous tasks in %s.%s', tag === ClassComponent ? 'the componentWillUnmount method' : 'a useEffect cleanup function', getStackByFiberInDevAndProd(fiber));
  }
}

var beginWork$$1;

if (true && replayFailedUnitOfWorkWithInvokeGuardedCallback) {
  var dummyFiber = null;

  beginWork$$1 = function (current$$1, unitOfWork, expirationTime) {
    // If a component throws an error, we replay it again in a synchronously
    // dispatched event, so that the debugger will treat it as an uncaught
    // error See ReactErrorUtils for more information.
    // Before entering the begin phase, copy the work-in-progress onto a dummy
    // fiber. If beginWork throws, we'll use this to reset the state.
    var originalWorkInProgressCopy = assignFiberPropertiesInDEV(dummyFiber, unitOfWork);

    try {
      return beginWork$1(current$$1, unitOfWork, expirationTime);
    } catch (originalError) {
      if (originalError !== null && typeof originalError === 'object' && typeof originalError.then === 'function') {
        // Don't replay promises. Treat everything else like an error.
        throw originalError;
      } // Keep this code in sync with handleError; any changes here must have
      // corresponding changes there.


      resetContextDependencies();
      resetHooks(); // Don't reset current debug fiber, since we're about to work on the
      // same fiber again.
      // Unwind the failed stack frame

      unwindInterruptedWork(unitOfWork); // Restore the original properties of the fiber.

      assignFiberPropertiesInDEV(unitOfWork, originalWorkInProgressCopy);

      if (enableProfilerTimer && unitOfWork.mode & ProfileMode) {
        // Reset the profiler timer.
        startProfilerTimer(unitOfWork);
      } // Run beginWork again.


      invokeGuardedCallback(null, beginWork$1, null, current$$1, unitOfWork, expirationTime);

      if (hasCaughtError()) {
        var replayError = clearCaughtError(); // `invokeGuardedCallback` sometimes sets an expando `_suppressLogging`.
        // Rethrow this error instead of the original one.

        throw replayError;
      } else {
        // This branch is reachable if the render phase is impure.
        throw originalError;
      }
    }
  };
} else {
  beginWork$$1 = beginWork$1;
}

var didWarnAboutUpdateInRender = false;
var didWarnAboutUpdateInGetChildContext = false;

function warnAboutInvalidUpdatesOnClassComponentsInDEV(fiber) {
  {
    if (fiber.tag === ClassComponent) {
      switch (phase) {
        case 'getChildContext':
          if (didWarnAboutUpdateInGetChildContext) {
            return;
          }

          warningWithoutStack$1(false, 'setState(...): Cannot call setState() inside getChildContext()');
          didWarnAboutUpdateInGetChildContext = true;
          break;

        case 'render':
          if (didWarnAboutUpdateInRender) {
            return;
          }

          warningWithoutStack$1(false, 'Cannot update during an existing state transition (such as ' + 'within `render`). Render methods should be a pure function of ' + 'props and state.');
          didWarnAboutUpdateInRender = true;
          break;
      }
    }
  }
} // a 'shared' variable that changes when act() opens/closes in tests.


var IsThisRendererActing = {
  current: false
};
function warnIfNotScopedWithMatchingAct(fiber) {
  {
    if (warnsIfNotActing === true && IsSomeRendererActing.current === true && IsThisRendererActing.current !== true) {
      warningWithoutStack$1(false, "It looks like you're using the wrong act() around your test interactions.\n" + 'Be sure to use the matching version of act() corresponding to your renderer:\n\n' + '// for react-dom:\n' + "import {act} from 'react-dom/test-utils';\n" + '// ...\n' + 'act(() => ...);\n\n' + '// for react-test-renderer:\n' + "import TestRenderer from 'react-test-renderer';\n" + 'const {act} = TestRenderer;\n' + '// ...\n' + 'act(() => ...);' + '%s', getStackByFiberInDevAndProd(fiber));
    }
  }
}
function warnIfNotCurrentlyActingEffectsInDEV(fiber) {
  {
    if (warnsIfNotActing === true && (fiber.mode & StrictMode) !== NoMode && IsSomeRendererActing.current === false && IsThisRendererActing.current === false) {
      warningWithoutStack$1(false, 'An update to %s ran an effect, but was not wrapped in act(...).\n\n' + 'When testing, code that causes React state updates should be ' + 'wrapped into act(...):\n\n' + 'act(() => {\n' + '  /* fire events that update state */\n' + '});\n' + '/* assert on the output */\n\n' + "This ensures that you're testing the behavior the user would see " + 'in the browser.' + ' Learn more at https://fb.me/react-wrap-tests-with-act' + '%s', getComponentName(fiber.type), getStackByFiberInDevAndProd(fiber));
    }
  }
}

function warnIfNotCurrentlyActingUpdatesInDEV(fiber) {
  {
    if (warnsIfNotActing === true && executionContext === NoContext && IsSomeRendererActing.current === false && IsThisRendererActing.current === false) {
      warningWithoutStack$1(false, 'An update to %s inside a test was not wrapped in act(...).\n\n' + 'When testing, code that causes React state updates should be ' + 'wrapped into act(...):\n\n' + 'act(() => {\n' + '  /* fire events that update state */\n' + '});\n' + '/* assert on the output */\n\n' + "This ensures that you're testing the behavior the user would see " + 'in the browser.' + ' Learn more at https://fb.me/react-wrap-tests-with-act' + '%s', getComponentName(fiber.type), getStackByFiberInDevAndProd(fiber));
    }
  }
}

var warnIfNotCurrentlyActingUpdatesInDev = warnIfNotCurrentlyActingUpdatesInDEV; // In tests, we want to enforce a mocked scheduler.

var didWarnAboutUnmockedScheduler = false; // TODO Before we release concurrent mode, revisit this and decide whether a mocked
// scheduler is the actual recommendation. The alternative could be a testing build,
// a new lib, or whatever; we dunno just yet. This message is for early adopters
// to get their tests right.

function warnIfUnmockedScheduler(fiber) {
  {
    if (didWarnAboutUnmockedScheduler === false && Scheduler.unstable_flushAllWithoutAsserting === undefined) {
      if (fiber.mode & BatchedMode || fiber.mode & ConcurrentMode) {
        didWarnAboutUnmockedScheduler = true;
        warningWithoutStack$1(false, 'In Concurrent or Sync modes, the "scheduler" module needs to be mocked ' + 'to guarantee consistent behaviour across tests and browsers. ' + 'For example, with jest: \n' + "jest.mock('scheduler', () => require('scheduler/unstable_mock'));\n\n" + 'For more info, visit https://fb.me/react-mock-scheduler');
      } else if (warnAboutUnmockedScheduler === true) {
        didWarnAboutUnmockedScheduler = true;
        warningWithoutStack$1(false, 'Starting from React v17, the "scheduler" module will need to be mocked ' + 'to guarantee consistent behaviour across tests and browsers. ' + 'For example, with jest: \n' + "jest.mock('scheduler', () => require('scheduler/unstable_mock'));\n\n" + 'For more info, visit https://fb.me/react-mock-scheduler');
      }
    }
  }
}
var componentsThatTriggeredHighPriSuspend = null;
function checkForWrongSuspensePriorityInDEV(sourceFiber) {
  {
    var currentPriorityLevel = getCurrentPriorityLevel();

    if ((sourceFiber.mode & ConcurrentMode) !== NoEffect && (currentPriorityLevel === UserBlockingPriority$2 || currentPriorityLevel === ImmediatePriority)) {
      var workInProgressNode = sourceFiber;

      while (workInProgressNode !== null) {
        // Add the component that triggered the suspense
        var current$$1 = workInProgressNode.alternate;

        if (current$$1 !== null) {
          // TODO: warn component that triggers the high priority
          // suspend is the HostRoot
          switch (workInProgressNode.tag) {
            case ClassComponent:
              // Loop through the component's update queue and see whether the component
              // has triggered any high priority updates
              var updateQueue = current$$1.updateQueue;

              if (updateQueue !== null) {
                var update = updateQueue.firstUpdate;

                while (update !== null) {
                  var priorityLevel = update.priority;

                  if (priorityLevel === UserBlockingPriority$2 || priorityLevel === ImmediatePriority) {
                    if (componentsThatTriggeredHighPriSuspend === null) {
                      componentsThatTriggeredHighPriSuspend = new Set([getComponentName(workInProgressNode.type)]);
                    } else {
                      componentsThatTriggeredHighPriSuspend.add(getComponentName(workInProgressNode.type));
                    }

                    break;
                  }

                  update = update.next;
                }
              }

              break;

            case FunctionComponent:
            case ForwardRef:
            case SimpleMemoComponent:
              if (workInProgressNode.memoizedState !== null && workInProgressNode.memoizedState.baseUpdate !== null) {
                var _update = workInProgressNode.memoizedState.baseUpdate; // Loop through the functional component's memoized state to see whether
                // the component has triggered any high pri updates

                while (_update !== null) {
                  var priority = _update.priority;

                  if (priority === UserBlockingPriority$2 || priority === ImmediatePriority) {
                    if (componentsThatTriggeredHighPriSuspend === null) {
                      componentsThatTriggeredHighPriSuspend = new Set([getComponentName(workInProgressNode.type)]);
                    } else {
                      componentsThatTriggeredHighPriSuspend.add(getComponentName(workInProgressNode.type));
                    }

                    break;
                  }

                  if (_update.next === workInProgressNode.memoizedState.baseUpdate) {
                    break;
                  }

                  _update = _update.next;
                }
              }

              break;

            default:
              break;
          }
        }

        workInProgressNode = workInProgressNode.return;
      }
    }
  }
}

function flushSuspensePriorityWarningInDEV() {
  {
    if (componentsThatTriggeredHighPriSuspend !== null) {
      var componentNames = [];
      componentsThatTriggeredHighPriSuspend.forEach(function (name) {
        return componentNames.push(name);
      });
      componentsThatTriggeredHighPriSuspend = null;

      if (componentNames.length > 0) {
        warningWithoutStack$1(false, '%s triggered a user-blocking update that suspended.' + '\n\n' + 'The fix is to split the update into multiple parts: a user-blocking ' + 'update to provide immediate feedback, and another update that ' + 'triggers the bulk of the changes.' + '\n\n' + 'Refer to the documentation for useTransition to learn how ' + 'to implement this pattern.', // TODO: Add link to React docs with more information, once it exists
        componentNames.sort().join(', '));
      }
    }
  }
}

function computeThreadID(root, expirationTime) {
  // Interaction threads are unique per root and expiration time.
  return expirationTime * 1000 + root.interactionThreadID;
}

function markSpawnedWork(expirationTime) {
  if (!enableSchedulerTracing) {
    return;
  }

  if (spawnedWorkDuringRender === null) {
    spawnedWorkDuringRender = [expirationTime];
  } else {
    spawnedWorkDuringRender.push(expirationTime);
  }
}

function scheduleInteractions(root, expirationTime, interactions) {
  if (!enableSchedulerTracing) {
    return;
  }

  if (interactions.size > 0) {
    var pendingInteractionMap = root.pendingInteractionMap;
    var pendingInteractions = pendingInteractionMap.get(expirationTime);

    if (pendingInteractions != null) {
      interactions.forEach(function (interaction) {
        if (!pendingInteractions.has(interaction)) {
          // Update the pending async work count for previously unscheduled interaction.
          interaction.__count++;
        }

        pendingInteractions.add(interaction);
      });
    } else {
      pendingInteractionMap.set(expirationTime, new Set(interactions)); // Update the pending async work count for the current interactions.

      interactions.forEach(function (interaction) {
        interaction.__count++;
      });
    }

    var subscriber = tracing.__subscriberRef.current;

    if (subscriber !== null) {
      var threadID = computeThreadID(root, expirationTime);
      subscriber.onWorkScheduled(interactions, threadID);
    }
  }
}

function schedulePendingInteractions(root, expirationTime) {
  // This is called when work is scheduled on a root.
  // It associates the current interactions with the newly-scheduled expiration.
  // They will be restored when that expiration is later committed.
  if (!enableSchedulerTracing) {
    return;
  }

  scheduleInteractions(root, expirationTime, tracing.__interactionsRef.current);
}

function startWorkOnPendingInteractions(root, expirationTime) {
  // This is called when new work is started on a root.
  if (!enableSchedulerTracing) {
    return;
  } // Determine which interactions this batch of work currently includes, So that
  // we can accurately attribute time spent working on it, And so that cascading
  // work triggered during the render phase will be associated with it.


  var interactions = new Set();
  root.pendingInteractionMap.forEach(function (scheduledInteractions, scheduledExpirationTime) {
    if (scheduledExpirationTime >= expirationTime) {
      scheduledInteractions.forEach(function (interaction) {
        return interactions.add(interaction);
      });
    }
  }); // Store the current set of interactions on the FiberRoot for a few reasons:
  // We can re-use it in hot functions like performConcurrentWorkOnRoot()
  // without having to recalculate it. We will also use it in commitWork() to
  // pass to any Profiler onRender() hooks. This also provides DevTools with a
  // way to access it when the onCommitRoot() hook is called.

  root.memoizedInteractions = interactions;

  if (interactions.size > 0) {
    var subscriber = tracing.__subscriberRef.current;

    if (subscriber !== null) {
      var threadID = computeThreadID(root, expirationTime);

      try {
        subscriber.onWorkStarted(interactions, threadID);
      } catch (error) {
        // If the subscriber throws, rethrow it in a separate task
        scheduleCallback(ImmediatePriority, function () {
          throw error;
        });
      }
    }
  }
}

function finishPendingInteractions(root, committedExpirationTime) {
  if (!enableSchedulerTracing) {
    return;
  }

  var earliestRemainingTimeAfterCommit = root.firstPendingTime;
  var subscriber;

  try {
    subscriber = tracing.__subscriberRef.current;

    if (subscriber !== null && root.memoizedInteractions.size > 0) {
      var threadID = computeThreadID(root, committedExpirationTime);
      subscriber.onWorkStopped(root.memoizedInteractions, threadID);
    }
  } catch (error) {
    // If the subscriber throws, rethrow it in a separate task
    scheduleCallback(ImmediatePriority, function () {
      throw error;
    });
  } finally {
    // Clear completed interactions from the pending Map.
    // Unless the render was suspended or cascading work was scheduled,
    // In which case– leave pending interactions until the subsequent render.
    var pendingInteractionMap = root.pendingInteractionMap;
    pendingInteractionMap.forEach(function (scheduledInteractions, scheduledExpirationTime) {
      // Only decrement the pending interaction count if we're done.
      // If there's still work at the current priority,
      // That indicates that we are waiting for suspense data.
      if (scheduledExpirationTime > earliestRemainingTimeAfterCommit) {
        pendingInteractionMap.delete(scheduledExpirationTime);
        scheduledInteractions.forEach(function (interaction) {
          interaction.__count--;

          if (subscriber !== null && interaction.__count === 0) {
            try {
              subscriber.onInteractionScheduledWorkCompleted(interaction);
            } catch (error) {
              // If the subscriber throws, rethrow it in a separate task
              scheduleCallback(ImmediatePriority, function () {
                throw error;
              });
            }
          }
        });
      }
    });
  }
}

var onCommitFiberRoot = null;
var onCommitFiberUnmount = null;
var hasLoggedError = false;
var isDevToolsPresent = typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ !== 'undefined';
function injectInternals(internals) {
  if (typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ === 'undefined') {
    // No DevTools
    return false;
  }

  var hook = __REACT_DEVTOOLS_GLOBAL_HOOK__;

  if (hook.isDisabled) {
    // This isn't a real property on the hook, but it can be set to opt out
    // of DevTools integration and associated warnings and logs.
    // https://github.com/facebook/react/issues/3877
    return true;
  }

  if (!hook.supportsFiber) {
    {
      warningWithoutStack$1(false, 'The installed version of React DevTools is too old and will not work ' + 'with the current version of React. Please update React DevTools. ' + 'https://fb.me/react-devtools');
    } // DevTools exists, even though it doesn't support Fiber.


    return true;
  }

  try {
    var rendererID = hook.inject(internals); // We have successfully injected, so now it is safe to set up hooks.

    onCommitFiberRoot = function (root, expirationTime) {
      try {
        var didError = (root.current.effectTag & DidCapture) === DidCapture;

        if (enableProfilerTimer) {
          var currentTime = getCurrentTime();
          var priorityLevel = inferPriorityFromExpirationTime(currentTime, expirationTime);
          hook.onCommitFiberRoot(rendererID, root, priorityLevel, didError);
        } else {
          hook.onCommitFiberRoot(rendererID, root, undefined, didError);
        }
      } catch (err) {
        if (true && !hasLoggedError) {
          hasLoggedError = true;
          warningWithoutStack$1(false, 'React DevTools encountered an error: %s', err);
        }
      }
    };

    onCommitFiberUnmount = function (fiber) {
      try {
        hook.onCommitFiberUnmount(rendererID, fiber);
      } catch (err) {
        if (true && !hasLoggedError) {
          hasLoggedError = true;
          warningWithoutStack$1(false, 'React DevTools encountered an error: %s', err);
        }
      }
    };
  } catch (err) {
    // Catch all errors because it is unsafe to throw during initialization.
    {
      warningWithoutStack$1(false, 'React DevTools encountered an error: %s.', err);
    }
  } // DevTools exists


  return true;
}
function onCommitRoot(root, expirationTime) {
  if (typeof onCommitFiberRoot === 'function') {
    onCommitFiberRoot(root, expirationTime);
  }
}
function onCommitUnmount(fiber) {
  if (typeof onCommitFiberUnmount === 'function') {
    onCommitFiberUnmount(fiber);
  }
}

var hasBadMapPolyfill;

{
  hasBadMapPolyfill = false;

  try {
    var nonExtensibleObject = Object.preventExtensions({});
    var testMap = new Map([[nonExtensibleObject, null]]);
    var testSet = new Set([nonExtensibleObject]); // This is necessary for Rollup to not consider these unused.
    // https://github.com/rollup/rollup/issues/1771
    // TODO: we can remove these if Rollup fixes the bug.

    testMap.set(0, 0);
    testSet.add(0);
  } catch (e) {
    // TODO: Consider warning about bad polyfills
    hasBadMapPolyfill = true;
  }
}

var debugCounter = 1;

function FiberNode(tag, pendingProps, key, mode) {
  // Instance
  this.tag = tag;
  this.key = key;
  this.elementType = null;
  this.type = null;
  this.stateNode = null; // Fiber

  this.return = null;
  this.child = null;
  this.sibling = null;
  this.index = 0;
  this.ref = null;
  this.pendingProps = pendingProps;
  this.memoizedProps = null;
  this.updateQueue = null;
  this.memoizedState = null;
  this.dependencies = null;
  this.mode = mode; // Effects

  this.effectTag = NoEffect;
  this.nextEffect = null;
  this.firstEffect = null;
  this.lastEffect = null;
  this.expirationTime = NoWork;
  this.childExpirationTime = NoWork;
  this.alternate = null;

  if (enableProfilerTimer) {
    // Note: The following is done to avoid a v8 performance cliff.
    //
    // Initializing the fields below to smis and later updating them with
    // double values will cause Fibers to end up having separate shapes.
    // This behavior/bug has something to do with Object.preventExtension().
    // Fortunately this only impacts DEV builds.
    // Unfortunately it makes React unusably slow for some applications.
    // To work around this, initialize the fields below with doubles.
    //
    // Learn more about this here:
    // https://github.com/facebook/react/issues/14365
    // https://bugs.chromium.org/p/v8/issues/detail?id=8538
    this.actualDuration = Number.NaN;
    this.actualStartTime = Number.NaN;
    this.selfBaseDuration = Number.NaN;
    this.treeBaseDuration = Number.NaN; // It's okay to replace the initial doubles with smis after initialization.
    // This won't trigger the performance cliff mentioned above,
    // and it simplifies other profiler code (including DevTools).

    this.actualDuration = 0;
    this.actualStartTime = -1;
    this.selfBaseDuration = 0;
    this.treeBaseDuration = 0;
  } // This is normally DEV-only except www when it adds listeners.
  // TODO: remove the User Timing integration in favor of Root Events.


  if (enableUserTimingAPI) {
    this._debugID = debugCounter++;
    this._debugIsCurrentlyTiming = false;
  }

  {
    this._debugSource = null;
    this._debugOwner = null;
    this._debugNeedsRemount = false;
    this._debugHookTypes = null;

    if (!hasBadMapPolyfill && typeof Object.preventExtensions === 'function') {
      Object.preventExtensions(this);
    }
  }
} // This is a constructor function, rather than a POJO constructor, still
// please ensure we do the following:
// 1) Nobody should add any instance methods on this. Instance methods can be
//    more difficult to predict when they get optimized and they are almost
//    never inlined properly in static compilers.
// 2) Nobody should rely on `instanceof Fiber` for type testing. We should
//    always know when it is a fiber.
// 3) We might want to experiment with using numeric keys since they are easier
//    to optimize in a non-JIT environment.
// 4) We can easily go from a constructor to a createFiber object literal if that
//    is faster.
// 5) It should be easy to port this to a C struct and keep a C implementation
//    compatible.


var createFiber = function (tag, pendingProps, key, mode) {
  // $FlowFixMe: the shapes are exact here but Flow doesn't like constructors
  return new FiberNode(tag, pendingProps, key, mode);
};

function shouldConstruct(Component) {
  var prototype = Component.prototype;
  return !!(prototype && prototype.isReactComponent);
}

function isSimpleFunctionComponent(type) {
  return typeof type === 'function' && !shouldConstruct(type) && type.defaultProps === undefined;
}
function resolveLazyComponentTag(Component) {
  if (typeof Component === 'function') {
    return shouldConstruct(Component) ? ClassComponent : FunctionComponent;
  } else if (Component !== undefined && Component !== null) {
    var $$typeof = Component.$$typeof;

    if ($$typeof === REACT_FORWARD_REF_TYPE) {
      return ForwardRef;
    }

    if ($$typeof === REACT_MEMO_TYPE) {
      return MemoComponent;
    }
  }

  return IndeterminateComponent;
} // This is used to create an alternate fiber to do work on.

function createWorkInProgress(current, pendingProps, expirationTime) {
  var workInProgress = current.alternate;

  if (workInProgress === null) {
    // We use a double buffering pooling technique because we know that we'll
    // only ever need at most two versions of a tree. We pool the "other" unused
    // node that we're free to reuse. This is lazily created to avoid allocating
    // extra objects for things that are never updated. It also allow us to
    // reclaim the extra memory if needed.
    workInProgress = createFiber(current.tag, pendingProps, current.key, current.mode);
    workInProgress.elementType = current.elementType;
    workInProgress.type = current.type;
    workInProgress.stateNode = current.stateNode;

    {
      // DEV-only fields
      workInProgress._debugID = current._debugID;
      workInProgress._debugSource = current._debugSource;
      workInProgress._debugOwner = current._debugOwner;
      workInProgress._debugHookTypes = current._debugHookTypes;
    }

    workInProgress.alternate = current;
    current.alternate = workInProgress;
  } else {
    workInProgress.pendingProps = pendingProps; // We already have an alternate.
    // Reset the effect tag.

    workInProgress.effectTag = NoEffect; // The effect list is no longer valid.

    workInProgress.nextEffect = null;
    workInProgress.firstEffect = null;
    workInProgress.lastEffect = null;

    if (enableProfilerTimer) {
      // We intentionally reset, rather than copy, actualDuration & actualStartTime.
      // This prevents time from endlessly accumulating in new commits.
      // This has the downside of resetting values for different priority renders,
      // But works for yielding (the common case) and should support resuming.
      workInProgress.actualDuration = 0;
      workInProgress.actualStartTime = -1;
    }
  }

  workInProgress.childExpirationTime = current.childExpirationTime;
  workInProgress.expirationTime = current.expirationTime;
  workInProgress.child = current.child;
  workInProgress.memoizedProps = current.memoizedProps;
  workInProgress.memoizedState = current.memoizedState;
  workInProgress.updateQueue = current.updateQueue; // Clone the dependencies object. This is mutated during the render phase, so
  // it cannot be shared with the current fiber.

  var currentDependencies = current.dependencies;
  workInProgress.dependencies = currentDependencies === null ? null : {
    expirationTime: currentDependencies.expirationTime,
    firstContext: currentDependencies.firstContext,
    responders: currentDependencies.responders
  }; // These will be overridden during the parent's reconciliation

  workInProgress.sibling = current.sibling;
  workInProgress.index = current.index;
  workInProgress.ref = current.ref;

  if (enableProfilerTimer) {
    workInProgress.selfBaseDuration = current.selfBaseDuration;
    workInProgress.treeBaseDuration = current.treeBaseDuration;
  }

  {
    workInProgress._debugNeedsRemount = current._debugNeedsRemount;

    switch (workInProgress.tag) {
      case IndeterminateComponent:
      case FunctionComponent:
      case SimpleMemoComponent:
        workInProgress.type = resolveFunctionForHotReloading(current.type);
        break;

      case ClassComponent:
        workInProgress.type = resolveClassForHotReloading(current.type);
        break;

      case ForwardRef:
        workInProgress.type = resolveForwardRefForHotReloading(current.type);
        break;

      default:
        break;
    }
  }

  return workInProgress;
} // Used to reuse a Fiber for a second pass.

function resetWorkInProgress(workInProgress, renderExpirationTime) {
  // This resets the Fiber to what createFiber or createWorkInProgress would
  // have set the values to before during the first pass. Ideally this wouldn't
  // be necessary but unfortunately many code paths reads from the workInProgress
  // when they should be reading from current and writing to workInProgress.
  // We assume pendingProps, index, key, ref, return are still untouched to
  // avoid doing another reconciliation.
  // Reset the effect tag but keep any Placement tags, since that's something
  // that child fiber is setting, not the reconciliation.
  workInProgress.effectTag &= Placement; // The effect list is no longer valid.

  workInProgress.nextEffect = null;
  workInProgress.firstEffect = null;
  workInProgress.lastEffect = null;
  var current = workInProgress.alternate;

  if (current === null) {
    // Reset to createFiber's initial values.
    workInProgress.childExpirationTime = NoWork;
    workInProgress.expirationTime = renderExpirationTime;
    workInProgress.child = null;
    workInProgress.memoizedProps = null;
    workInProgress.memoizedState = null;
    workInProgress.updateQueue = null;
    workInProgress.dependencies = null;

    if (enableProfilerTimer) {
      // Note: We don't reset the actualTime counts. It's useful to accumulate
      // actual time across multiple render passes.
      workInProgress.selfBaseDuration = 0;
      workInProgress.treeBaseDuration = 0;
    }
  } else {
    // Reset to the cloned values that createWorkInProgress would've.
    workInProgress.childExpirationTime = current.childExpirationTime;
    workInProgress.expirationTime = current.expirationTime;
    workInProgress.child = current.child;
    workInProgress.memoizedProps = current.memoizedProps;
    workInProgress.memoizedState = current.memoizedState;
    workInProgress.updateQueue = current.updateQueue; // Clone the dependencies object. This is mutated during the render phase, so
    // it cannot be shared with the current fiber.

    var currentDependencies = current.dependencies;
    workInProgress.dependencies = currentDependencies === null ? null : {
      expirationTime: currentDependencies.expirationTime,
      firstContext: currentDependencies.firstContext,
      responders: currentDependencies.responders
    };

    if (enableProfilerTimer) {
      // Note: We don't reset the actualTime counts. It's useful to accumulate
      // actual time across multiple render passes.
      workInProgress.selfBaseDuration = current.selfBaseDuration;
      workInProgress.treeBaseDuration = current.treeBaseDuration;
    }
  }

  return workInProgress;
}
function createHostRootFiber(tag) {
  var mode;

  if (tag === ConcurrentRoot) {
    mode = ConcurrentMode | BatchedMode | StrictMode;
  } else if (tag === BatchedRoot) {
    mode = BatchedMode | StrictMode;
  } else {
    mode = NoMode;
  }

  if (enableProfilerTimer && isDevToolsPresent) {
    // Always collect profile timings when DevTools are present.
    // This enables DevTools to start capturing timing at any point–
    // Without some nodes in the tree having empty base times.
    mode |= ProfileMode;
  }

  return createFiber(HostRoot, null, null, mode);
}
function createFiberFromTypeAndProps(type, // React$ElementType
key, pendingProps, owner, mode, expirationTime) {
  var fiber;
  var fiberTag = IndeterminateComponent; // The resolved type is set if we know what the final type will be. I.e. it's not lazy.

  var resolvedType = type;

  if (typeof type === 'function') {
    if (shouldConstruct(type)) {
      fiberTag = ClassComponent;

      {
        resolvedType = resolveClassForHotReloading(resolvedType);
      }
    } else {
      {
        resolvedType = resolveFunctionForHotReloading(resolvedType);
      }
    }
  } else if (typeof type === 'string') {
    fiberTag = HostComponent;
  } else {
    getTag: switch (type) {
      case REACT_FRAGMENT_TYPE:
        return createFiberFromFragment(pendingProps.children, mode, expirationTime, key);

      case REACT_CONCURRENT_MODE_TYPE:
        fiberTag = Mode;
        mode |= ConcurrentMode | BatchedMode | StrictMode;
        break;

      case REACT_STRICT_MODE_TYPE:
        fiberTag = Mode;
        mode |= StrictMode;
        break;

      case REACT_PROFILER_TYPE:
        return createFiberFromProfiler(pendingProps, mode, expirationTime, key);

      case REACT_SUSPENSE_TYPE:
        return createFiberFromSuspense(pendingProps, mode, expirationTime, key);

      case REACT_SUSPENSE_LIST_TYPE:
        return createFiberFromSuspenseList(pendingProps, mode, expirationTime, key);

      default:
        {
          if (typeof type === 'object' && type !== null) {
            switch (type.$$typeof) {
              case REACT_PROVIDER_TYPE:
                fiberTag = ContextProvider;
                break getTag;

              case REACT_CONTEXT_TYPE:
                // This is a consumer
                fiberTag = ContextConsumer;
                break getTag;

              case REACT_FORWARD_REF_TYPE:
                fiberTag = ForwardRef;

                {
                  resolvedType = resolveForwardRefForHotReloading(resolvedType);
                }

                break getTag;

              case REACT_MEMO_TYPE:
                fiberTag = MemoComponent;
                break getTag;

              case REACT_LAZY_TYPE:
                fiberTag = LazyComponent;
                resolvedType = null;
                break getTag;

              case REACT_FUNDAMENTAL_TYPE:
                if (enableFundamentalAPI) {
                  return createFiberFromFundamental(type, pendingProps, mode, expirationTime, key);
                }

                break;

              case REACT_SCOPE_TYPE:
                if (enableScopeAPI) {
                  return createFiberFromScope(type, pendingProps, mode, expirationTime, key);
                }

            }
          }

          var info = '';

          {
            if (type === undefined || typeof type === 'object' && type !== null && Object.keys(type).length === 0) {
              info += ' You likely forgot to export your component from the file ' + "it's defined in, or you might have mixed up default and " + 'named imports.';
            }

            var ownerName = owner ? getComponentName(owner.type) : null;

            if (ownerName) {
              info += '\n\nCheck the render method of `' + ownerName + '`.';
            }
          }

          {
            {
              throw Error("Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: " + (type == null ? type : typeof type) + "." + info);
            }
          }
        }
    }
  }

  fiber = createFiber(fiberTag, pendingProps, key, mode);
  fiber.elementType = type;
  fiber.type = resolvedType;
  fiber.expirationTime = expirationTime;
  return fiber;
}
function createFiberFromElement(element, mode, expirationTime) {
  var owner = null;

  {
    owner = element._owner;
  }

  var type = element.type;
  var key = element.key;
  var pendingProps = element.props;
  var fiber = createFiberFromTypeAndProps(type, key, pendingProps, owner, mode, expirationTime);

  {
    fiber._debugSource = element._source;
    fiber._debugOwner = element._owner;
  }

  return fiber;
}
function createFiberFromFragment(elements, mode, expirationTime, key) {
  var fiber = createFiber(Fragment, elements, key, mode);
  fiber.expirationTime = expirationTime;
  return fiber;
}
function createFiberFromFundamental(fundamentalComponent, pendingProps, mode, expirationTime, key) {
  var fiber = createFiber(FundamentalComponent, pendingProps, key, mode);
  fiber.elementType = fundamentalComponent;
  fiber.type = fundamentalComponent;
  fiber.expirationTime = expirationTime;
  return fiber;
}

function createFiberFromScope(scope, pendingProps, mode, expirationTime, key) {
  var fiber = createFiber(ScopeComponent, pendingProps, key, mode);
  fiber.type = scope;
  fiber.elementType = scope;
  fiber.expirationTime = expirationTime;
  return fiber;
}

function createFiberFromProfiler(pendingProps, mode, expirationTime, key) {
  {
    if (typeof pendingProps.id !== 'string' || typeof pendingProps.onRender !== 'function') {
      warningWithoutStack$1(false, 'Profiler must specify an "id" string and "onRender" function as props');
    }
  }

  var fiber = createFiber(Profiler, pendingProps, key, mode | ProfileMode); // TODO: The Profiler fiber shouldn't have a type. It has a tag.

  fiber.elementType = REACT_PROFILER_TYPE;
  fiber.type = REACT_PROFILER_TYPE;
  fiber.expirationTime = expirationTime;
  return fiber;
}

function createFiberFromSuspense(pendingProps, mode, expirationTime, key) {
  var fiber = createFiber(SuspenseComponent, pendingProps, key, mode); // TODO: The SuspenseComponent fiber shouldn't have a type. It has a tag.
  // This needs to be fixed in getComponentName so that it relies on the tag
  // instead.

  fiber.type = REACT_SUSPENSE_TYPE;
  fiber.elementType = REACT_SUSPENSE_TYPE;
  fiber.expirationTime = expirationTime;
  return fiber;
}
function createFiberFromSuspenseList(pendingProps, mode, expirationTime, key) {
  var fiber = createFiber(SuspenseListComponent, pendingProps, key, mode);

  {
    // TODO: The SuspenseListComponent fiber shouldn't have a type. It has a tag.
    // This needs to be fixed in getComponentName so that it relies on the tag
    // instead.
    fiber.type = REACT_SUSPENSE_LIST_TYPE;
  }

  fiber.elementType = REACT_SUSPENSE_LIST_TYPE;
  fiber.expirationTime = expirationTime;
  return fiber;
}
function createFiberFromText(content, mode, expirationTime) {
  var fiber = createFiber(HostText, content, null, mode);
  fiber.expirationTime = expirationTime;
  return fiber;
}
function createFiberFromHostInstanceForDeletion() {
  var fiber = createFiber(HostComponent, null, null, NoMode); // TODO: These should not need a type.

  fiber.elementType = 'DELETED';
  fiber.type = 'DELETED';
  return fiber;
}
function createFiberFromDehydratedFragment(dehydratedNode) {
  var fiber = createFiber(DehydratedFragment, null, null, NoMode);
  fiber.stateNode = dehydratedNode;
  return fiber;
}
function createFiberFromPortal(portal, mode, expirationTime) {
  var pendingProps = portal.children !== null ? portal.children : [];
  var fiber = createFiber(HostPortal, pendingProps, portal.key, mode);
  fiber.expirationTime = expirationTime;
  fiber.stateNode = {
    containerInfo: portal.containerInfo,
    pendingChildren: null,
    // Used by persistent updates
    implementation: portal.implementation
  };
  return fiber;
} // Used for stashing WIP properties to replay failed work in DEV.

function assignFiberPropertiesInDEV(target, source) {
  if (target === null) {
    // This Fiber's initial properties will always be overwritten.
    // We only use a Fiber to ensure the same hidden class so DEV isn't slow.
    target = createFiber(IndeterminateComponent, null, null, NoMode);
  } // This is intentionally written as a list of all properties.
  // We tried to use Object.assign() instead but this is called in
  // the hottest path, and Object.assign() was too slow:
  // https://github.com/facebook/react/issues/12502
  // This code is DEV-only so size is not a concern.


  target.tag = source.tag;
  target.key = source.key;
  target.elementType = source.elementType;
  target.type = source.type;
  target.stateNode = source.stateNode;
  target.return = source.return;
  target.child = source.child;
  target.sibling = source.sibling;
  target.index = source.index;
  target.ref = source.ref;
  target.pendingProps = source.pendingProps;
  target.memoizedProps = source.memoizedProps;
  target.updateQueue = source.updateQueue;
  target.memoizedState = source.memoizedState;
  target.dependencies = source.dependencies;
  target.mode = source.mode;
  target.effectTag = source.effectTag;
  target.nextEffect = source.nextEffect;
  target.firstEffect = source.firstEffect;
  target.lastEffect = source.lastEffect;
  target.expirationTime = source.expirationTime;
  target.childExpirationTime = source.childExpirationTime;
  target.alternate = source.alternate;

  if (enableProfilerTimer) {
    target.actualDuration = source.actualDuration;
    target.actualStartTime = source.actualStartTime;
    target.selfBaseDuration = source.selfBaseDuration;
    target.treeBaseDuration = source.treeBaseDuration;
  }

  target._debugID = source._debugID;
  target._debugSource = source._debugSource;
  target._debugOwner = source._debugOwner;
  target._debugIsCurrentlyTiming = source._debugIsCurrentlyTiming;
  target._debugNeedsRemount = source._debugNeedsRemount;
  target._debugHookTypes = source._debugHookTypes;
  return target;
}

function FiberRootNode(containerInfo, tag, hydrate) {
  this.tag = tag;
  this.current = null;
  this.containerInfo = containerInfo;
  this.pendingChildren = null;
  this.pingCache = null;
  this.finishedExpirationTime = NoWork;
  this.finishedWork = null;
  this.timeoutHandle = noTimeout;
  this.context = null;
  this.pendingContext = null;
  this.hydrate = hydrate;
  this.callbackNode = null;
  this.callbackPriority = NoPriority;
  this.firstPendingTime = NoWork;
  this.firstSuspendedTime = NoWork;
  this.lastSuspendedTime = NoWork;
  this.nextKnownPendingLevel = NoWork;
  this.lastPingedTime = NoWork;
  this.lastExpiredTime = NoWork;

  if (enableSchedulerTracing) {
    this.interactionThreadID = tracing.unstable_getThreadID();
    this.memoizedInteractions = new Set();
    this.pendingInteractionMap = new Map();
  }

  if (enableSuspenseCallback) {
    this.hydrationCallbacks = null;
  }
}

function createFiberRoot(containerInfo, tag, hydrate, hydrationCallbacks) {
  var root = new FiberRootNode(containerInfo, tag, hydrate);

  if (enableSuspenseCallback) {
    root.hydrationCallbacks = hydrationCallbacks;
  } // Cyclic construction. This cheats the type system right now because
  // stateNode is any.


  var uninitializedFiber = createHostRootFiber(tag);
  root.current = uninitializedFiber;
  uninitializedFiber.stateNode = root;
  return root;
}
function isRootSuspendedAtTime(root, expirationTime) {
  var firstSuspendedTime = root.firstSuspendedTime;
  var lastSuspendedTime = root.lastSuspendedTime;
  return firstSuspendedTime !== NoWork && firstSuspendedTime >= expirationTime && lastSuspendedTime <= expirationTime;
}
function markRootSuspendedAtTime(root, expirationTime) {
  var firstSuspendedTime = root.firstSuspendedTime;
  var lastSuspendedTime = root.lastSuspendedTime;

  if (firstSuspendedTime < expirationTime) {
    root.firstSuspendedTime = expirationTime;
  }

  if (lastSuspendedTime > expirationTime || firstSuspendedTime === NoWork) {
    root.lastSuspendedTime = expirationTime;
  }

  if (expirationTime <= root.lastPingedTime) {
    root.lastPingedTime = NoWork;
  }

  if (expirationTime <= root.lastExpiredTime) {
    root.lastExpiredTime = NoWork;
  }
}
function markRootUpdatedAtTime(root, expirationTime) {
  // Update the range of pending times
  var firstPendingTime = root.firstPendingTime;

  if (expirationTime > firstPendingTime) {
    root.firstPendingTime = expirationTime;
  } // Update the range of suspended times. Treat everything lower priority or
  // equal to this update as unsuspended.


  var firstSuspendedTime = root.firstSuspendedTime;

  if (firstSuspendedTime !== NoWork) {
    if (expirationTime >= firstSuspendedTime) {
      // The entire suspended range is now unsuspended.
      root.firstSuspendedTime = root.lastSuspendedTime = root.nextKnownPendingLevel = NoWork;
    } else if (expirationTime >= root.lastSuspendedTime) {
      root.lastSuspendedTime = expirationTime + 1;
    } // This is a pending level. Check if it's higher priority than the next
    // known pending level.


    if (expirationTime > root.nextKnownPendingLevel) {
      root.nextKnownPendingLevel = expirationTime;
    }
  }
}
function markRootFinishedAtTime(root, finishedExpirationTime, remainingExpirationTime) {
  // Update the range of pending times
  root.firstPendingTime = remainingExpirationTime; // Update the range of suspended times. Treat everything higher priority or
  // equal to this update as unsuspended.

  if (finishedExpirationTime <= root.lastSuspendedTime) {
    // The entire suspended range is now unsuspended.
    root.firstSuspendedTime = root.lastSuspendedTime = root.nextKnownPendingLevel = NoWork;
  } else if (finishedExpirationTime <= root.firstSuspendedTime) {
    // Part of the suspended range is now unsuspended. Narrow the range to
    // include everything between the unsuspended time (non-inclusive) and the
    // last suspended time.
    root.firstSuspendedTime = finishedExpirationTime - 1;
  }

  if (finishedExpirationTime <= root.lastPingedTime) {
    // Clear the pinged time
    root.lastPingedTime = NoWork;
  }

  if (finishedExpirationTime <= root.lastExpiredTime) {
    // Clear the expired time
    root.lastExpiredTime = NoWork;
  }
}
function markRootExpiredAtTime(root, expirationTime) {
  var lastExpiredTime = root.lastExpiredTime;

  if (lastExpiredTime === NoWork || lastExpiredTime > expirationTime) {
    root.lastExpiredTime = expirationTime;
  }
}

// This lets us hook into Fiber to debug what it's doing.
// See https://github.com/facebook/react/pull/8033.
// This is not part of the public API, not even for React DevTools.
// You may only inject a debugTool if you work on React Fiber itself.
var ReactFiberInstrumentation = {
  debugTool: null
};
var ReactFiberInstrumentation_1 = ReactFiberInstrumentation;

var didWarnAboutNestedUpdates;
var didWarnAboutFindNodeInStrictMode;

{
  didWarnAboutNestedUpdates = false;
  didWarnAboutFindNodeInStrictMode = {};
}

function getContextForSubtree(parentComponent) {
  if (!parentComponent) {
    return emptyContextObject;
  }

  var fiber = get(parentComponent);
  var parentContext = findCurrentUnmaskedContext(fiber);

  if (fiber.tag === ClassComponent) {
    var Component = fiber.type;

    if (isContextProvider(Component)) {
      return processChildContext(fiber, Component, parentContext);
    }
  }

  return parentContext;
}

function findHostInstance(component) {
  var fiber = get(component);

  if (fiber === undefined) {
    if (typeof component.render === 'function') {
      {
        {
          throw Error("Unable to find node on an unmounted component.");
        }
      }
    } else {
      {
        {
          throw Error("Argument appears to not be a ReactComponent. Keys: " + Object.keys(component));
        }
      }
    }
  }

  var hostFiber = findCurrentHostFiber(fiber);

  if (hostFiber === null) {
    return null;
  }

  return hostFiber.stateNode;
}

function findHostInstanceWithWarning(component, methodName) {
  {
    var fiber = get(component);

    if (fiber === undefined) {
      if (typeof component.render === 'function') {
        {
          {
            throw Error("Unable to find node on an unmounted component.");
          }
        }
      } else {
        {
          {
            throw Error("Argument appears to not be a ReactComponent. Keys: " + Object.keys(component));
          }
        }
      }
    }

    var hostFiber = findCurrentHostFiber(fiber);

    if (hostFiber === null) {
      return null;
    }

    if (hostFiber.mode & StrictMode) {
      var componentName = getComponentName(fiber.type) || 'Component';

      if (!didWarnAboutFindNodeInStrictMode[componentName]) {
        didWarnAboutFindNodeInStrictMode[componentName] = true;

        if (fiber.mode & StrictMode) {
          warningWithoutStack$1(false, '%s is deprecated in StrictMode. ' + '%s was passed an instance of %s which is inside StrictMode. ' + 'Instead, add a ref directly to the element you want to reference. ' + 'Learn more about using refs safely here: ' + 'https://fb.me/react-strict-mode-find-node%s', methodName, methodName, componentName, getStackByFiberInDevAndProd(hostFiber));
        } else {
          warningWithoutStack$1(false, '%s is deprecated in StrictMode. ' + '%s was passed an instance of %s which renders StrictMode children. ' + 'Instead, add a ref directly to the element you want to reference. ' + 'Learn more about using refs safely here: ' + 'https://fb.me/react-strict-mode-find-node%s', methodName, methodName, componentName, getStackByFiberInDevAndProd(hostFiber));
        }
      }
    }

    return hostFiber.stateNode;
  }

  return findHostInstance(component);
}

function createContainer(containerInfo, tag, hydrate, hydrationCallbacks) {
  return createFiberRoot(containerInfo, tag, hydrate, hydrationCallbacks);
}
function updateContainer(element, container, parentComponent, callback) {
  var current$$1 = container.current;
  var currentTime = requestCurrentTimeForUpdate();

  {
    // $FlowExpectedError - jest isn't a global, and isn't recognized outside of tests
    if ('undefined' !== typeof jest) {
      warnIfUnmockedScheduler(current$$1);
      warnIfNotScopedWithMatchingAct(current$$1);
    }
  }

  var suspenseConfig = requestCurrentSuspenseConfig();
  var expirationTime = computeExpirationForFiber(currentTime, current$$1, suspenseConfig);

  {
    if (ReactFiberInstrumentation_1.debugTool) {
      if (current$$1.alternate === null) {
        ReactFiberInstrumentation_1.debugTool.onMountContainer(container);
      } else if (element === null) {
        ReactFiberInstrumentation_1.debugTool.onUnmountContainer(container);
      } else {
        ReactFiberInstrumentation_1.debugTool.onUpdateContainer(container);
      }
    }
  }

  var context = getContextForSubtree(parentComponent);

  if (container.context === null) {
    container.context = context;
  } else {
    container.pendingContext = context;
  }

  {
    if (phase === 'render' && current !== null && !didWarnAboutNestedUpdates) {
      didWarnAboutNestedUpdates = true;
      warningWithoutStack$1(false, 'Render methods should be a pure function of props and state; ' + 'triggering nested component updates from render is not allowed. ' + 'If necessary, trigger nested updates in componentDidUpdate.\n\n' + 'Check the render method of %s.', getComponentName(current.type) || 'Unknown');
    }
  }

  var update = createUpdate(expirationTime, suspenseConfig); // Caution: React DevTools currently depends on this property
  // being called "element".

  update.payload = {
    element: element
  };
  callback = callback === undefined ? null : callback;

  if (callback !== null) {
    !(typeof callback === 'function') ? warningWithoutStack$1(false, 'render(...): Expected the last optional `callback` argument to be a ' + 'function. Instead received: %s.', callback) : void 0;
    update.callback = callback;
  }

  enqueueUpdate(current$$1, update);
  scheduleWork(current$$1, expirationTime);
  return expirationTime;
}
function getPublicRootInstance(container) {
  var containerFiber = container.current;

  if (!containerFiber.child) {
    return null;
  }

  switch (containerFiber.child.tag) {
    case HostComponent:
      return getPublicInstance(containerFiber.child.stateNode);

    default:
      return containerFiber.child.stateNode;
  }
}
function attemptSynchronousHydration$1(fiber) {
  switch (fiber.tag) {
    case HostRoot:
      var root = fiber.stateNode;

      if (root.hydrate) {
        // Flush the first scheduled "update".
        flushRoot(root, root.firstPendingTime);
      }

      break;

    case SuspenseComponent:
      flushSync(function () {
        return scheduleWork(fiber, Sync);
      }); // If we're still blocked after this, we need to increase
      // the priority of any promises resolving within this
      // boundary so that they next attempt also has higher pri.

      var retryExpTime = computeInteractiveExpiration(requestCurrentTimeForUpdate());
      markRetryTimeIfNotHydrated(fiber, retryExpTime);
      break;
  }
}

function markRetryTimeImpl(fiber, retryTime) {
  var suspenseState = fiber.memoizedState;

  if (suspenseState !== null && suspenseState.dehydrated !== null) {
    if (suspenseState.retryTime < retryTime) {
      suspenseState.retryTime = retryTime;
    }
  }
} // Increases the priority of thennables when they resolve within this boundary.


function markRetryTimeIfNotHydrated(fiber, retryTime) {
  markRetryTimeImpl(fiber, retryTime);
  var alternate = fiber.alternate;

  if (alternate) {
    markRetryTimeImpl(alternate, retryTime);
  }
}

function attemptUserBlockingHydration$1(fiber) {
  if (fiber.tag !== SuspenseComponent) {
    // We ignore HostRoots here because we can't increase
    // their priority and they should not suspend on I/O,
    // since you have to wrap anything that might suspend in
    // Suspense.
    return;
  }

  var expTime = computeInteractiveExpiration(requestCurrentTimeForUpdate());
  scheduleWork(fiber, expTime);
  markRetryTimeIfNotHydrated(fiber, expTime);
}
function attemptContinuousHydration$1(fiber) {
  if (fiber.tag !== SuspenseComponent) {
    // We ignore HostRoots here because we can't increase
    // their priority and they should not suspend on I/O,
    // since you have to wrap anything that might suspend in
    // Suspense.
    return;
  }

  var expTime = computeContinuousHydrationExpiration(requestCurrentTimeForUpdate());
  scheduleWork(fiber, expTime);
  markRetryTimeIfNotHydrated(fiber, expTime);
}
function attemptHydrationAtCurrentPriority$1(fiber) {
  if (fiber.tag !== SuspenseComponent) {
    // We ignore HostRoots here because we can't increase
    // their priority other than synchronously flush it.
    return;
  }

  var currentTime = requestCurrentTimeForUpdate();
  var expTime = computeExpirationForFiber(currentTime, fiber, null);
  scheduleWork(fiber, expTime);
  markRetryTimeIfNotHydrated(fiber, expTime);
}
function findHostInstanceWithNoPortals(fiber) {
  var hostFiber = findCurrentHostFiberWithNoPortals(fiber);

  if (hostFiber === null) {
    return null;
  }

  if (hostFiber.tag === FundamentalComponent) {
    return hostFiber.stateNode.instance;
  }

  return hostFiber.stateNode;
}

var shouldSuspendImpl = function (fiber) {
  return false;
};

function shouldSuspend(fiber) {
  return shouldSuspendImpl(fiber);
}
var overrideHookState = null;
var overrideProps = null;
var scheduleUpdate = null;
var setSuspenseHandler = null;

{
  var copyWithSetImpl = function (obj, path, idx, value) {
    if (idx >= path.length) {
      return value;
    }

    var key = path[idx];
    var updated = Array.isArray(obj) ? obj.slice() : _assign({}, obj); // $FlowFixMe number or string is fine here

    updated[key] = copyWithSetImpl(obj[key], path, idx + 1, value);
    return updated;
  };

  var copyWithSet = function (obj, path, value) {
    return copyWithSetImpl(obj, path, 0, value);
  }; // Support DevTools editable values for useState and useReducer.


  overrideHookState = function (fiber, id, path, value) {
    // For now, the "id" of stateful hooks is just the stateful hook index.
    // This may change in the future with e.g. nested hooks.
    var currentHook = fiber.memoizedState;

    while (currentHook !== null && id > 0) {
      currentHook = currentHook.next;
      id--;
    }

    if (currentHook !== null) {
      var newState = copyWithSet(currentHook.memoizedState, path, value);
      currentHook.memoizedState = newState;
      currentHook.baseState = newState; // We aren't actually adding an update to the queue,
      // because there is no update we can add for useReducer hooks that won't trigger an error.
      // (There's no appropriate action type for DevTools overrides.)
      // As a result though, React will see the scheduled update as a noop and bailout.
      // Shallow cloning props works as a workaround for now to bypass the bailout check.

      fiber.memoizedProps = _assign({}, fiber.memoizedProps);
      scheduleWork(fiber, Sync);
    }
  }; // Support DevTools props for function components, forwardRef, memo, host components, etc.


  overrideProps = function (fiber, path, value) {
    fiber.pendingProps = copyWithSet(fiber.memoizedProps, path, value);

    if (fiber.alternate) {
      fiber.alternate.pendingProps = fiber.pendingProps;
    }

    scheduleWork(fiber, Sync);
  };

  scheduleUpdate = function (fiber) {
    scheduleWork(fiber, Sync);
  };

  setSuspenseHandler = function (newShouldSuspendImpl) {
    shouldSuspendImpl = newShouldSuspendImpl;
  };
}

function injectIntoDevTools(devToolsConfig) {
  var findFiberByHostInstance = devToolsConfig.findFiberByHostInstance;
  var ReactCurrentDispatcher = ReactSharedInternals.ReactCurrentDispatcher;
  return injectInternals(_assign({}, devToolsConfig, {
    overrideHookState: overrideHookState,
    overrideProps: overrideProps,
    setSuspenseHandler: setSuspenseHandler,
    scheduleUpdate: scheduleUpdate,
    currentDispatcherRef: ReactCurrentDispatcher,
    findHostInstanceByFiber: function (fiber) {
      var hostFiber = findCurrentHostFiber(fiber);

      if (hostFiber === null) {
        return null;
      }

      return hostFiber.stateNode;
    },
    findFiberByHostInstance: function (instance) {
      if (!findFiberByHostInstance) {
        // Might not be implemented by the renderer.
        return null;
      }

      return findFiberByHostInstance(instance);
    },
    // React Refresh
    findHostInstancesForRefresh: findHostInstancesForRefresh,
    scheduleRefresh: scheduleRefresh,
    scheduleRoot: scheduleRoot,
    setRefreshHandler: setRefreshHandler,
    // Enables DevTools to append owner stacks to error messages in DEV mode.
    getCurrentFiber: function () {
      return current;
    }
  }));
}

// This file intentionally does *not* have the Flow annotation.
// Don't add it. See `./inline-typed.js` for an explanation.

function createPortal$1(children, containerInfo, // TODO: figure out the API for cross-renderer implementation.
implementation) {
  var key = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
  return {
    // This tag allow us to uniquely identify this as a React Portal
    $$typeof: REACT_PORTAL_TYPE,
    key: key == null ? null : '' + key,
    children: children,
    containerInfo: containerInfo,
    implementation: implementation
  };
}

// TODO: this is special because it gets imported during build.

var ReactVersion = '16.11.0';

// TODO: This type is shared between the reconciler and ReactDOM, but will
// eventually be lifted out to the renderer.
setAttemptSynchronousHydration(attemptSynchronousHydration$1);
setAttemptUserBlockingHydration(attemptUserBlockingHydration$1);
setAttemptContinuousHydration(attemptContinuousHydration$1);
setAttemptHydrationAtCurrentPriority(attemptHydrationAtCurrentPriority$1);
var ReactCurrentOwner = ReactSharedInternals.ReactCurrentOwner;
var topLevelUpdateWarnings;
var warnOnInvalidCallback;
var didWarnAboutUnstableCreatePortal = false;

{
  if (typeof Map !== 'function' || // $FlowIssue Flow incorrectly thinks Map has no prototype
  Map.prototype == null || typeof Map.prototype.forEach !== 'function' || typeof Set !== 'function' || // $FlowIssue Flow incorrectly thinks Set has no prototype
  Set.prototype == null || typeof Set.prototype.clear !== 'function' || typeof Set.prototype.forEach !== 'function') {
    warningWithoutStack$1(false, 'React depends on Map and Set built-in types. Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills');
  }

  topLevelUpdateWarnings = function (container) {
    if (container._reactRootContainer && container.nodeType !== COMMENT_NODE) {
      var hostInstance = findHostInstanceWithNoPortals(container._reactRootContainer._internalRoot.current);

      if (hostInstance) {
        !(hostInstance.parentNode === container) ? warningWithoutStack$1(false, 'render(...): It looks like the React-rendered content of this ' + 'container was removed without using React. This is not ' + 'supported and will cause errors. Instead, call ' + 'ReactDOM.unmountComponentAtNode to empty a container.') : void 0;
      }
    }

    var isRootRenderedBySomeReact = !!container._reactRootContainer;
    var rootEl = getReactRootElementInContainer(container);
    var hasNonRootReactChild = !!(rootEl && getInstanceFromNode$1(rootEl));
    !(!hasNonRootReactChild || isRootRenderedBySomeReact) ? warningWithoutStack$1(false, 'render(...): Replacing React-rendered children with a new root ' + 'component. If you intended to update the children of this node, ' + 'you should instead have the existing children update their state ' + 'and render the new components instead of calling ReactDOM.render.') : void 0;
    !(container.nodeType !== ELEMENT_NODE || !container.tagName || container.tagName.toUpperCase() !== 'BODY') ? warningWithoutStack$1(false, 'render(): Rendering components directly into document.body is ' + 'discouraged, since its children are often manipulated by third-party ' + 'scripts and browser extensions. This may lead to subtle ' + 'reconciliation issues. Try rendering into a container element created ' + 'for your app.') : void 0;
  };

  warnOnInvalidCallback = function (callback, callerName) {
    !(callback === null || typeof callback === 'function') ? warningWithoutStack$1(false, '%s(...): Expected the last optional `callback` argument to be a ' + 'function. Instead received: %s.', callerName, callback) : void 0;
  };
}

setRestoreImplementation(restoreControlledState$$1);

function createRootImpl(container, tag, options) {
  // Tag is either LegacyRoot or Concurrent Root
  var hydrate = options != null && options.hydrate === true;
  var hydrationCallbacks = options != null && options.hydrationOptions || null;
  var root = createContainer(container, tag, hydrate, hydrationCallbacks);
  markContainerAsRoot(root.current, container);

  if (hydrate && tag !== LegacyRoot) {
    var doc = container.nodeType === DOCUMENT_NODE ? container : container.ownerDocument;
    eagerlyTrapReplayableEvents(doc);
  }

  return root;
}

function ReactSyncRoot(container, tag, options) {
  this._internalRoot = createRootImpl(container, tag, options);
}

function ReactRoot(container, options) {
  this._internalRoot = createRootImpl(container, ConcurrentRoot, options);
}

ReactRoot.prototype.render = ReactSyncRoot.prototype.render = function (children, callback) {
  var root = this._internalRoot;
  callback = callback === undefined ? null : callback;

  {
    warnOnInvalidCallback(callback, 'render');
  }

  updateContainer(children, root, null, callback);
};

ReactRoot.prototype.unmount = ReactSyncRoot.prototype.unmount = function (callback) {
  var root = this._internalRoot;
  callback = callback === undefined ? null : callback;

  {
    warnOnInvalidCallback(callback, 'render');
  }

  updateContainer(null, root, null, callback);
};
/**
 * True if the supplied DOM node is a valid node element.
 *
 * @param {?DOMElement} node The candidate DOM node.
 * @return {boolean} True if the DOM is a valid DOM node.
 * @internal
 */


function isValidContainer(node) {
  return !!(node && (node.nodeType === ELEMENT_NODE || node.nodeType === DOCUMENT_NODE || node.nodeType === DOCUMENT_FRAGMENT_NODE || node.nodeType === COMMENT_NODE && node.nodeValue === ' react-mount-point-unstable '));
}

function getReactRootElementInContainer(container) {
  if (!container) {
    return null;
  }

  if (container.nodeType === DOCUMENT_NODE) {
    return container.documentElement;
  } else {
    return container.firstChild;
  }
}

function shouldHydrateDueToLegacyHeuristic(container) {
  var rootElement = getReactRootElementInContainer(container);
  return !!(rootElement && rootElement.nodeType === ELEMENT_NODE && rootElement.hasAttribute(ROOT_ATTRIBUTE_NAME));
}

setBatchingImplementation(batchedUpdates$1, discreteUpdates$1, flushDiscreteUpdates, batchedEventUpdates$1);
var warnedAboutHydrateAPI = false;

function legacyCreateRootFromDOMContainer(container, forceHydrate) {
  var shouldHydrate = forceHydrate || shouldHydrateDueToLegacyHeuristic(container); // First clear any existing content.

  if (!shouldHydrate) {
    var warned = false;
    var rootSibling;

    while (rootSibling = container.lastChild) {
      {
        if (!warned && rootSibling.nodeType === ELEMENT_NODE && rootSibling.hasAttribute(ROOT_ATTRIBUTE_NAME)) {
          warned = true;
          warningWithoutStack$1(false, 'render(): Target node has markup rendered by React, but there ' + 'are unrelated nodes as well. This is most commonly caused by ' + 'white-space inserted around server-rendered markup.');
        }
      }

      container.removeChild(rootSibling);
    }
  }

  {
    if (shouldHydrate && !forceHydrate && !warnedAboutHydrateAPI) {
      warnedAboutHydrateAPI = true;
      lowPriorityWarningWithoutStack$1(false, 'render(): Calling ReactDOM.render() to hydrate server-rendered markup ' + 'will stop working in React v17. Replace the ReactDOM.render() call ' + 'with ReactDOM.hydrate() if you want React to attach to the server HTML.');
    }
  } // Legacy roots are not batched.


  return new ReactSyncRoot(container, LegacyRoot, shouldHydrate ? {
    hydrate: true
  } : undefined);
}

function legacyRenderSubtreeIntoContainer(parentComponent, children, container, forceHydrate, callback) {
  {
    topLevelUpdateWarnings(container);
    warnOnInvalidCallback(callback === undefined ? null : callback, 'render');
  } // TODO: Without `any` type, Flow says "Property cannot be accessed on any
  // member of intersection type." Whyyyyyy.


  var root = container._reactRootContainer;
  var fiberRoot;

  if (!root) {
    // Initial mount
    root = container._reactRootContainer = legacyCreateRootFromDOMContainer(container, forceHydrate);
    fiberRoot = root._internalRoot;

    if (typeof callback === 'function') {
      var originalCallback = callback;

      callback = function () {
        var instance = getPublicRootInstance(fiberRoot);
        originalCallback.call(instance);
      };
    } // Initial mount should not be batched.


    unbatchedUpdates(function () {
      updateContainer(children, fiberRoot, parentComponent, callback);
    });
  } else {
    fiberRoot = root._internalRoot;

    if (typeof callback === 'function') {
      var _originalCallback = callback;

      callback = function () {
        var instance = getPublicRootInstance(fiberRoot);

        _originalCallback.call(instance);
      };
    } // Update


    updateContainer(children, fiberRoot, parentComponent, callback);
  }

  return getPublicRootInstance(fiberRoot);
}

function createPortal$$1(children, container) {
  var key = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;

  if (!isValidContainer(container)) {
    {
      throw Error("Target container is not a DOM element.");
    }
  } // TODO: pass ReactDOM portal implementation as third argument


  return createPortal$1(children, container, null, key);
}

var ReactDOM = {
  createPortal: createPortal$$1,
  findDOMNode: function (componentOrElement) {
    {
      var owner = ReactCurrentOwner.current;

      if (owner !== null && owner.stateNode !== null) {
        var warnedAboutRefsInRender = owner.stateNode._warnedAboutRefsInRender;
        !warnedAboutRefsInRender ? warningWithoutStack$1(false, '%s is accessing findDOMNode inside its render(). ' + 'render() should be a pure function of props and state. It should ' + 'never access something that requires stale data from the previous ' + 'render, such as refs. Move this logic to componentDidMount and ' + 'componentDidUpdate instead.', getComponentName(owner.type) || 'A component') : void 0;
        owner.stateNode._warnedAboutRefsInRender = true;
      }
    }

    if (componentOrElement == null) {
      return null;
    }

    if (componentOrElement.nodeType === ELEMENT_NODE) {
      return componentOrElement;
    }

    {
      return findHostInstanceWithWarning(componentOrElement, 'findDOMNode');
    }

    return findHostInstance(componentOrElement);
  },
  hydrate: function (element, container, callback) {
    if (!isValidContainer(container)) {
      {
        throw Error("Target container is not a DOM element.");
      }
    }

    {
      !!container._reactHasBeenPassedToCreateRootDEV ? warningWithoutStack$1(false, 'You are calling ReactDOM.hydrate() on a container that was previously ' + 'passed to ReactDOM.createRoot(). This is not supported. ' + 'Did you mean to call createRoot(container, {hydrate: true}).render(element)?') : void 0;
    } // TODO: throw or warn if we couldn't hydrate?


    return legacyRenderSubtreeIntoContainer(null, element, container, true, callback);
  },
  render: function (element, container, callback) {
    if (!isValidContainer(container)) {
      {
        throw Error("Target container is not a DOM element.");
      }
    }

    {
      !!container._reactHasBeenPassedToCreateRootDEV ? warningWithoutStack$1(false, 'You are calling ReactDOM.render() on a container that was previously ' + 'passed to ReactDOM.createRoot(). This is not supported. ' + 'Did you mean to call root.render(element)?') : void 0;
    }

    return legacyRenderSubtreeIntoContainer(null, element, container, false, callback);
  },
  unstable_renderSubtreeIntoContainer: function (parentComponent, element, containerNode, callback) {
    if (!isValidContainer(containerNode)) {
      {
        throw Error("Target container is not a DOM element.");
      }
    }

    if (!(parentComponent != null && has(parentComponent))) {
      {
        throw Error("parentComponent must be a valid React Component");
      }
    }

    return legacyRenderSubtreeIntoContainer(parentComponent, element, containerNode, false, callback);
  },
  unmountComponentAtNode: function (container) {
    if (!isValidContainer(container)) {
      {
        throw Error("unmountComponentAtNode(...): Target container is not a DOM element.");
      }
    }

    {
      !!container._reactHasBeenPassedToCreateRootDEV ? warningWithoutStack$1(false, 'You are calling ReactDOM.unmountComponentAtNode() on a container that was previously ' + 'passed to ReactDOM.createRoot(). This is not supported. Did you mean to call root.unmount()?') : void 0;
    }

    if (container._reactRootContainer) {
      {
        var rootEl = getReactRootElementInContainer(container);
        var renderedByDifferentReact = rootEl && !getInstanceFromNode$1(rootEl);
        !!renderedByDifferentReact ? warningWithoutStack$1(false, "unmountComponentAtNode(): The node you're attempting to unmount " + 'was rendered by another copy of React.') : void 0;
      } // Unmount should not be batched.


      unbatchedUpdates(function () {
        legacyRenderSubtreeIntoContainer(null, null, container, false, function () {
          container._reactRootContainer = null;
        });
      }); // If you call unmountComponentAtNode twice in quick succession, you'll
      // get `true` twice. That's probably fine?

      return true;
    } else {
      {
        var _rootEl = getReactRootElementInContainer(container);

        var hasNonRootReactChild = !!(_rootEl && getInstanceFromNode$1(_rootEl)); // Check if the container itself is a React root node.

        var isContainerReactRoot = container.nodeType === ELEMENT_NODE && isValidContainer(container.parentNode) && !!container.parentNode._reactRootContainer;
        !!hasNonRootReactChild ? warningWithoutStack$1(false, "unmountComponentAtNode(): The node you're attempting to unmount " + 'was rendered by React and is not a top-level container. %s', isContainerReactRoot ? 'You may have accidentally passed in a React root node instead ' + 'of its container.' : 'Instead, have the parent component update its state and ' + 'rerender in order to remove this component.') : void 0;
      }

      return false;
    }
  },
  // Temporary alias since we already shipped React 16 RC with it.
  // TODO: remove in React 17.
  unstable_createPortal: function () {
    if (!didWarnAboutUnstableCreatePortal) {
      didWarnAboutUnstableCreatePortal = true;
      lowPriorityWarningWithoutStack$1(false, 'The ReactDOM.unstable_createPortal() alias has been deprecated, ' + 'and will be removed in React 17+. Update your code to use ' + 'ReactDOM.createPortal() instead. It has the exact same API, ' + 'but without the "unstable_" prefix.');
    }

    return createPortal$$1.apply(void 0, arguments);
  },
  unstable_batchedUpdates: batchedUpdates$1,
  flushSync: flushSync,
  __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED: {
    // Keep in sync with ReactDOMUnstableNativeDependencies.js
    // ReactTestUtils.js, and ReactTestUtilsAct.js. This is an array for better minification.
    Events: [getInstanceFromNode$1, getNodeFromInstance$1, getFiberCurrentPropsFromNode$1, injection.injectEventPluginsByName, eventNameDispatchConfigs, accumulateTwoPhaseDispatches, accumulateDirectDispatches, enqueueStateRestore, restoreStateIfNeeded, dispatchEvent, runEventsInBatch, flushPassiveEffects, IsThisRendererActing]
  }
};

function createRoot(container, options) {
  if (!isValidContainer(container)) {
    {
      throw Error("createRoot(...): Target container is not a DOM element.");
    }
  }

  warnIfReactDOMContainerInDEV(container);
  return new ReactRoot(container, options);
}

function createSyncRoot(container, options) {
  if (!isValidContainer(container)) {
    {
      throw Error("createRoot(...): Target container is not a DOM element.");
    }
  }

  warnIfReactDOMContainerInDEV(container);
  return new ReactSyncRoot(container, BatchedRoot, options);
}

function warnIfReactDOMContainerInDEV(container) {
  {
    !!container._reactRootContainer ? warningWithoutStack$1(false, 'You are calling ReactDOM.createRoot() on a container that was previously ' + 'passed to ReactDOM.render(). This is not supported.') : void 0;
    container._reactHasBeenPassedToCreateRootDEV = true;
  }
}

if (exposeConcurrentModeAPIs) {
  ReactDOM.createRoot = createRoot;
  ReactDOM.createSyncRoot = createSyncRoot;
  ReactDOM.unstable_discreteUpdates = discreteUpdates$1;
  ReactDOM.unstable_flushDiscreteUpdates = flushDiscreteUpdates;
  ReactDOM.unstable_flushControlled = flushControlled;

  ReactDOM.unstable_scheduleHydration = function (target) {
    if (target) {
      queueExplicitHydrationTarget(target);
    }
  };
}

var foundDevTools = injectIntoDevTools({
  findFiberByHostInstance: getClosestInstanceFromNode,
  bundleType: 1,
  version: ReactVersion,
  rendererPackageName: 'react-dom'
});

{
  if (!foundDevTools && canUseDOM && window.top === window.self) {
    // If we're in Chrome or Firefox, provide a download link if not installed.
    if (navigator.userAgent.indexOf('Chrome') > -1 && navigator.userAgent.indexOf('Edge') === -1 || navigator.userAgent.indexOf('Firefox') > -1) {
      var protocol = window.location.protocol; // Don't warn in exotic cases like chrome-extension://.

      if (/^(https?|file):$/.test(protocol)) {
        console.info('%cDownload the React DevTools ' + 'for a better development experience: ' + 'https://fb.me/react-devtools' + (protocol === 'file:' ? '\nYou might need to use a local HTTP server (instead of file://): ' + 'https://fb.me/react-devtools-faq' : ''), 'font-weight:bold');
      }
    }
  }
}



var ReactDOM$2 = Object.freeze({
	default: ReactDOM
});

var ReactDOM$3 = ( ReactDOM$2 && ReactDOM ) || ReactDOM$2;

// TODO: decide on the top-level export form.
// This is hacky but makes it work with both Rollup and Jest.


var reactDom = ReactDOM$3.default || ReactDOM$3;

module.exports = reactDom;
  })();
}

}).call(this,require('_process'))
},{"_process":11,"object-assign":10,"prop-types/checkPropTypes":12,"react":35,"scheduler":40,"scheduler/tracing":41}],20:[function(require,module,exports){
/** @license React v16.11.0
 * react-dom.production.min.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

/*
 Modernizr 3.0.0pre (Custom Build) | MIT
*/
'use strict';var aa=require("react"),n=require("object-assign"),q=require("scheduler");function u(a){for(var b="https://reactjs.org/docs/error-decoder.html?invariant="+a,c=1;c<arguments.length;c++)b+="&args[]="+encodeURIComponent(arguments[c]);return"Minified React error #"+a+"; visit "+b+" for the full message or use the non-minified dev environment for full errors and additional helpful warnings."}if(!aa)throw Error(u(227));var ba=null,ca={};
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var Ca={injectEventPluginOrder:function(a){if(ba)throw Error(u(101));ba=Array.prototype.slice.call(a);da()},injectEventPluginsByName:function(a){var b=!1,c;for(c in a)if(a.hasOwnProperty(c)){var d=a[c];if(!ca.hasOwnProperty(c)||ca[c]!==d){if(ca[c])throw Error(u(102,c));ca[c]=d;b=!0}}b&&da()}};
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function rk(a,b,c,d){var e=b.current,f=Pg(),g=Mg.suspense;f=Qg(f,e,g);a:if(c){c=c._reactInternalFiber;b:{if(ec(c)!==c||1!==c.tag)throw Error(u(170));var h=c;do{switch(h.tag){case 3:h=h.stateNode.context;break b;case 1:if(L(h.type)){h=h.stateNode.__reactInternalMemoizedMergedChildContext;break b}}h=h.return}while(null!==h);throw Error(u(171));}if(1===c.tag){var k=c.type;if(L(k)){c=If(c,k,h);break a}}c=h}else c=Cf;null===b.context?b.context=c:b.pendingContext=c;b=Bg(f,g);b.payload={element:a};d=void 0===
d?null:d;null!==d&&(b.callback=d);Dg(e,b);Rg(e,f);return f}function sk(a){a=a.current;if(!a.child)return null;switch(a.child.tag){case 5:return a.child.stateNode;default:return a.child.stateNode}}function tk(a,b){a=a.memoizedState;null!==a&&null!==a.dehydrated&&a.retryTime<b&&(a.retryTime=b)}function uk(a,b){tk(a,b);(a=a.alternate)&&tk(a,b)}
function vk(a,b,c){var d=3<arguments.length&&void 0!==arguments[3]?arguments[3]:null;return{$$typeof:Ha,key:null==d?null:""+d,children:a,containerInfo:b,implementation:c}}jc=function(a){if(13===a.tag){var b=lg(Pg(),150,100);Rg(a,b);uk(a,b)}};kc=function(a){if(13===a.tag){Pg();var b=kg++;Rg(a,b);uk(a,b)}};lc=function(a){if(13===a.tag){var b=Pg();b=Qg(b,a,null);Rg(a,b);uk(a,b)}};
Za=function(a,b,c){switch(b){case "input":Eb(a,c);b=c.name;if("radio"===c.type&&null!=b){for(c=a;c.parentNode;)c=c.parentNode;c=c.querySelectorAll("input[name="+JSON.stringify(""+b)+'][type="radio"]');for(b=0;b<c.length;b++){var d=c[b];if(d!==a&&d.form===a.form){var e=ye(d);if(!e)throw Error(u(90));zb(d);Eb(d,e)}}}break;case "textarea":Mb(a,c);break;case "select":b=c.value,null!=b&&Jb(a,!!c.multiple,b,!1)}};
function wk(a,b,c){c=null!=c&&!0===c.hydrate;var d=new qk(a,b,c),e=gi(3,null,null,2===b?7:1===b?3:0);d.current=e;e.stateNode=d;a[we]=d.current;c&&0!==b&&wc(9===a.nodeType?a:a.ownerDocument);this._internalRoot=d}wk.prototype.render=function(a,b){var c=this._internalRoot;rk(a,c,null,void 0===b?null:b)};wk.prototype.unmount=function(a){var b=this._internalRoot;rk(null,b,null,void 0===a?null:a)};
function yk(a){return!(!a||1!==a.nodeType&&9!==a.nodeType&&11!==a.nodeType&&(8!==a.nodeType||" react-mount-point-unstable "!==a.nodeValue))}eb=bk;fb=function(a,b,c,d){var e=T;T|=4;try{return fg(98,a.bind(null,b,c,d))}finally{T=e,T===S&&jg()}};gb=function(){(T&(1|oj|pj))===S&&(ak(),Sj())};hb=function(a,b){var c=T;T|=2;try{return a(b)}finally{T=c,T===S&&jg()}};
function zk(a,b){b||(b=a?9===a.nodeType?a.documentElement:a.firstChild:null,b=!(!b||1!==b.nodeType||!b.hasAttribute("data-reactroot")));if(!b)for(var c;c=a.lastChild;)a.removeChild(c);return new wk(a,0,b?{hydrate:!0}:void 0)}
function Ak(a,b,c,d,e){var f=c._reactRootContainer;if(f){var g=f._internalRoot;if("function"===typeof e){var h=e;e=function(){var a=sk(g);h.call(a)}}rk(b,g,a,e)}else{f=c._reactRootContainer=zk(c,d);g=f._internalRoot;if("function"===typeof e){var k=e;e=function(){var a=sk(g);k.call(a)}}ck(function(){rk(b,g,a,e)})}return sk(g)}function Bk(a,b){var c=2<arguments.length&&void 0!==arguments[2]?arguments[2]:null;if(!yk(b))throw Error(u(200));return vk(a,b,null,c)}
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if(null==a||void 0===a._reactInternalFiber)throw Error(u(38));return Ak(a,b,c,!1,d)},unmountComponentAtNode:function(a){if(!yk(a))throw Error(u(40));return a._reactRootContainer?(ck(function(){Ak(null,null,a,!1,function(){a._reactRootContainer=null})}),!0):!1},unstable_createPortal:function(){return Bk.apply(void 0,arguments)},unstable_batchedUpdates:bk,flushSync:function(a,b){if((T&(oj|pj))!==S)throw Error(u(187));var c=T;T|=1;try{return fg(99,a.bind(null,b))}finally{T=c,jg()}},__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED:{Events:[Cc,
xe,ye,Ca.injectEventPluginsByName,fa,Sc,function(a){ya(a,Rc)},cb,db,Pd,Ba,Sj,{current:!1}]}};
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rendererPackageName:"react-dom"});var Dk={default:Ck},Ek=Dk&&Ck||Dk;module.exports=Ek.default||Ek;

},{"object-assign":10,"react":35,"scheduler":40}],21:[function(require,module,exports){
(function (process){
'use strict';

function checkDCE() {
  /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
  if (
    typeof __REACT_DEVTOOLS_GLOBAL_HOOK__ === 'undefined' ||
    typeof __REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE !== 'function'
  ) {
    return;
  }
  if (process.env.NODE_ENV !== 'production') {
    // This branch is unreachable because this function is only called
    // in production, but the condition is true only in development.
    // Therefore if the branch is still here, dead code elimination wasn't
    // properly applied.
    // Don't change the message. React DevTools relies on it. Also make sure
    // this message doesn't occur elsewhere in this function, or it will cause
    // a false positive.
    throw new Error('^_^');
  }
  try {
    // Verify that the code above has been dead code eliminated (DCE'd).
    __REACT_DEVTOOLS_GLOBAL_HOOK__.checkDCE(checkDCE);
  } catch (err) {
    // DevTools shouldn't crash React, no matter what.
    // We should still report in case we break this code.
    console.error(err);
  }
}

if (process.env.NODE_ENV === 'production') {
  // DCE check should happen before ReactDOM bundle executes so that
  // DevTools can report bad minification during injection.
  checkDCE();
  module.exports = require('./cjs/react-dom.production.min.js');
} else {
  module.exports = require('./cjs/react-dom.development.js');
}

}).call(this,require('_process'))
},{"./cjs/react-dom.development.js":19,"./cjs/react-dom.production.min.js":20,"_process":11}],22:[function(require,module,exports){
(function (process){
/** @license React v16.10.1
 * react-is.development.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';



if (process.env.NODE_ENV !== "production") {
  (function() {
'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

// The Symbol used to tag the ReactElement-like types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var hasSymbol = typeof Symbol === 'function' && Symbol.for;
var REACT_ELEMENT_TYPE = hasSymbol ? Symbol.for('react.element') : 0xeac7;
var REACT_PORTAL_TYPE = hasSymbol ? Symbol.for('react.portal') : 0xeaca;
var REACT_FRAGMENT_TYPE = hasSymbol ? Symbol.for('react.fragment') : 0xeacb;
var REACT_STRICT_MODE_TYPE = hasSymbol ? Symbol.for('react.strict_mode') : 0xeacc;
var REACT_PROFILER_TYPE = hasSymbol ? Symbol.for('react.profiler') : 0xead2;
var REACT_PROVIDER_TYPE = hasSymbol ? Symbol.for('react.provider') : 0xeacd;
var REACT_CONTEXT_TYPE = hasSymbol ? Symbol.for('react.context') : 0xeace; // TODO: We don't use AsyncMode or ConcurrentMode anymore. They were temporary
// (unstable) APIs that have been removed. Can we remove the symbols?

var REACT_ASYNC_MODE_TYPE = hasSymbol ? Symbol.for('react.async_mode') : 0xeacf;
var REACT_CONCURRENT_MODE_TYPE = hasSymbol ? Symbol.for('react.concurrent_mode') : 0xeacf;
var REACT_FORWARD_REF_TYPE = hasSymbol ? Symbol.for('react.forward_ref') : 0xead0;
var REACT_SUSPENSE_TYPE = hasSymbol ? Symbol.for('react.suspense') : 0xead1;
var REACT_SUSPENSE_LIST_TYPE = hasSymbol ? Symbol.for('react.suspense_list') : 0xead8;
var REACT_MEMO_TYPE = hasSymbol ? Symbol.for('react.memo') : 0xead3;
var REACT_LAZY_TYPE = hasSymbol ? Symbol.for('react.lazy') : 0xead4;
var REACT_FUNDAMENTAL_TYPE = hasSymbol ? Symbol.for('react.fundamental') : 0xead5;
var REACT_RESPONDER_TYPE = hasSymbol ? Symbol.for('react.responder') : 0xead6;
var REACT_SCOPE_TYPE = hasSymbol ? Symbol.for('react.scope') : 0xead7;

function isValidElementType(type) {
  return typeof type === 'string' || typeof type === 'function' || // Note: its typeof might be other than 'symbol' or 'number' if it's a polyfill.
  type === REACT_FRAGMENT_TYPE || type === REACT_CONCURRENT_MODE_TYPE || type === REACT_PROFILER_TYPE || type === REACT_STRICT_MODE_TYPE || type === REACT_SUSPENSE_TYPE || type === REACT_SUSPENSE_LIST_TYPE || typeof type === 'object' && type !== null && (type.$$typeof === REACT_LAZY_TYPE || type.$$typeof === REACT_MEMO_TYPE || type.$$typeof === REACT_PROVIDER_TYPE || type.$$typeof === REACT_CONTEXT_TYPE || type.$$typeof === REACT_FORWARD_REF_TYPE || type.$$typeof === REACT_FUNDAMENTAL_TYPE || type.$$typeof === REACT_RESPONDER_TYPE || type.$$typeof === REACT_SCOPE_TYPE);
}

/**
 * Forked from fbjs/warning:
 * https://github.com/facebook/fbjs/blob/e66ba20ad5be433eb54423f2b097d829324d9de6/packages/fbjs/src/__forks__/warning.js
 *
 * Only change is we use console.warn instead of console.error,
 * and do nothing when 'console' is not supported.
 * This really simplifies the code.
 * ---
 * Similar to invariant but only logs a warning if the condition is not met.
 * This can be used to log issues in development environments in critical
 * paths. Removing the logging code for production environments will keep the
 * same logic and follow the same code paths.
 */
var lowPriorityWarningWithoutStack = function () {};

{
  var printWarning = function (format) {
    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      args[_key - 1] = arguments[_key];
    }

    var argIndex = 0;
    var message = 'Warning: ' + format.replace(/%s/g, function () {
      return args[argIndex++];
    });

    if (typeof console !== 'undefined') {
      console.warn(message);
    }

    try {
      // --- Welcome to debugging React ---
      // This error was thrown as a convenience so that you can use this stack
      // to find the callsite that caused this warning to fire.
      throw new Error(message);
    } catch (x) {}
  };

  lowPriorityWarningWithoutStack = function (condition, format) {
    if (format === undefined) {
      throw new Error('`lowPriorityWarningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument');
    }

    if (!condition) {
      for (var _len2 = arguments.length, args = new Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
        args[_key2 - 2] = arguments[_key2];
      }

      printWarning.apply(void 0, [format].concat(args));
    }
  };
}

var lowPriorityWarningWithoutStack$1 = lowPriorityWarningWithoutStack;

function typeOf(object) {
  if (typeof object === 'object' && object !== null) {
    var $$typeof = object.$$typeof;

    switch ($$typeof) {
      case REACT_ELEMENT_TYPE:
        var type = object.type;

        switch (type) {
          case REACT_ASYNC_MODE_TYPE:
          case REACT_CONCURRENT_MODE_TYPE:
          case REACT_FRAGMENT_TYPE:
          case REACT_PROFILER_TYPE:
          case REACT_STRICT_MODE_TYPE:
          case REACT_SUSPENSE_TYPE:
            return type;

          default:
            var $$typeofType = type && type.$$typeof;

            switch ($$typeofType) {
              case REACT_CONTEXT_TYPE:
              case REACT_FORWARD_REF_TYPE:
              case REACT_PROVIDER_TYPE:
                return $$typeofType;

              default:
                return $$typeof;
            }

        }

      case REACT_LAZY_TYPE:
      case REACT_MEMO_TYPE:
      case REACT_PORTAL_TYPE:
        return $$typeof;
    }
  }

  return undefined;
} // AsyncMode is deprecated along with isAsyncMode

var AsyncMode = REACT_ASYNC_MODE_TYPE;
var ConcurrentMode = REACT_CONCURRENT_MODE_TYPE;
var ContextConsumer = REACT_CONTEXT_TYPE;
var ContextProvider = REACT_PROVIDER_TYPE;
var Element = REACT_ELEMENT_TYPE;
var ForwardRef = REACT_FORWARD_REF_TYPE;
var Fragment = REACT_FRAGMENT_TYPE;
var Lazy = REACT_LAZY_TYPE;
var Memo = REACT_MEMO_TYPE;
var Portal = REACT_PORTAL_TYPE;
var Profiler = REACT_PROFILER_TYPE;
var StrictMode = REACT_STRICT_MODE_TYPE;
var Suspense = REACT_SUSPENSE_TYPE;
var hasWarnedAboutDeprecatedIsAsyncMode = false; // AsyncMode should be deprecated

function isAsyncMode(object) {
  {
    if (!hasWarnedAboutDeprecatedIsAsyncMode) {
      hasWarnedAboutDeprecatedIsAsyncMode = true;
      lowPriorityWarningWithoutStack$1(false, 'The ReactIs.isAsyncMode() alias has been deprecated, ' + 'and will be removed in React 17+. Update your code to use ' + 'ReactIs.isConcurrentMode() instead. It has the exact same API.');
    }
  }

  return isConcurrentMode(object) || typeOf(object) === REACT_ASYNC_MODE_TYPE;
}
function isConcurrentMode(object) {
  return typeOf(object) === REACT_CONCURRENT_MODE_TYPE;
}
function isContextConsumer(object) {
  return typeOf(object) === REACT_CONTEXT_TYPE;
}
function isContextProvider(object) {
  return typeOf(object) === REACT_PROVIDER_TYPE;
}
function isElement(object) {
  return typeof object === 'object' && object !== null && object.$$typeof === REACT_ELEMENT_TYPE;
}
function isForwardRef(object) {
  return typeOf(object) === REACT_FORWARD_REF_TYPE;
}
function isFragment(object) {
  return typeOf(object) === REACT_FRAGMENT_TYPE;
}
function isLazy(object) {
  return typeOf(object) === REACT_LAZY_TYPE;
}
function isMemo(object) {
  return typeOf(object) === REACT_MEMO_TYPE;
}
function isPortal(object) {
  return typeOf(object) === REACT_PORTAL_TYPE;
}
function isProfiler(object) {
  return typeOf(object) === REACT_PROFILER_TYPE;
}
function isStrictMode(object) {
  return typeOf(object) === REACT_STRICT_MODE_TYPE;
}
function isSuspense(object) {
  return typeOf(object) === REACT_SUSPENSE_TYPE;
}

exports.typeOf = typeOf;
exports.AsyncMode = AsyncMode;
exports.ConcurrentMode = ConcurrentMode;
exports.ContextConsumer = ContextConsumer;
exports.ContextProvider = ContextProvider;
exports.Element = Element;
exports.ForwardRef = ForwardRef;
exports.Fragment = Fragment;
exports.Lazy = Lazy;
exports.Memo = Memo;
exports.Portal = Portal;
exports.Profiler = Profiler;
exports.StrictMode = StrictMode;
exports.Suspense = Suspense;
exports.isValidElementType = isValidElementType;
exports.isAsyncMode = isAsyncMode;
exports.isConcurrentMode = isConcurrentMode;
exports.isContextConsumer = isContextConsumer;
exports.isContextProvider = isContextProvider;
exports.isElement = isElement;
exports.isForwardRef = isForwardRef;
exports.isFragment = isFragment;
exports.isLazy = isLazy;
exports.isMemo = isMemo;
exports.isPortal = isPortal;
exports.isProfiler = isProfiler;
exports.isStrictMode = isStrictMode;
exports.isSuspense = isSuspense;
  })();
}

}).call(this,require('_process'))
},{"_process":11}],23:[function(require,module,exports){
/** @license React v16.10.1
 * react-is.production.min.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';Object.defineProperty(exports,"__esModule",{value:!0});
var b="function"===typeof Symbol&&Symbol.for,c=b?Symbol.for("react.element"):60103,d=b?Symbol.for("react.portal"):60106,e=b?Symbol.for("react.fragment"):60107,f=b?Symbol.for("react.strict_mode"):60108,g=b?Symbol.for("react.profiler"):60114,h=b?Symbol.for("react.provider"):60109,k=b?Symbol.for("react.context"):60110,l=b?Symbol.for("react.async_mode"):60111,m=b?Symbol.for("react.concurrent_mode"):60111,n=b?Symbol.for("react.forward_ref"):60112,p=b?Symbol.for("react.suspense"):60113,q=b?Symbol.for("react.suspense_list"):
60120,r=b?Symbol.for("react.memo"):60115,t=b?Symbol.for("react.lazy"):60116,v=b?Symbol.for("react.fundamental"):60117,w=b?Symbol.for("react.responder"):60118,x=b?Symbol.for("react.scope"):60119;function y(a){if("object"===typeof a&&null!==a){var u=a.$$typeof;switch(u){case c:switch(a=a.type,a){case l:case m:case e:case g:case f:case p:return a;default:switch(a=a&&a.$$typeof,a){case k:case n:case h:return a;default:return u}}case t:case r:case d:return u}}}function z(a){return y(a)===m}
exports.typeOf=y;exports.AsyncMode=l;exports.ConcurrentMode=m;exports.ContextConsumer=k;exports.ContextProvider=h;exports.Element=c;exports.ForwardRef=n;exports.Fragment=e;exports.Lazy=t;exports.Memo=r;exports.Portal=d;exports.Profiler=g;exports.StrictMode=f;exports.Suspense=p;
exports.isValidElementType=function(a){return"string"===typeof a||"function"===typeof a||a===e||a===m||a===g||a===f||a===p||a===q||"object"===typeof a&&null!==a&&(a.$$typeof===t||a.$$typeof===r||a.$$typeof===h||a.$$typeof===k||a.$$typeof===n||a.$$typeof===v||a.$$typeof===w||a.$$typeof===x)};exports.isAsyncMode=function(a){return z(a)||y(a)===l};exports.isConcurrentMode=z;exports.isContextConsumer=function(a){return y(a)===k};exports.isContextProvider=function(a){return y(a)===h};
exports.isElement=function(a){return"object"===typeof a&&null!==a&&a.$$typeof===c};exports.isForwardRef=function(a){return y(a)===n};exports.isFragment=function(a){return y(a)===e};exports.isLazy=function(a){return y(a)===t};exports.isMemo=function(a){return y(a)===r};exports.isPortal=function(a){return y(a)===d};exports.isProfiler=function(a){return y(a)===g};exports.isStrictMode=function(a){return y(a)===f};exports.isSuspense=function(a){return y(a)===p};

},{}],24:[function(require,module,exports){
(function (process){
'use strict';

if (process.env.NODE_ENV === 'production') {
  module.exports = require('./cjs/react-is.production.min.js');
} else {
  module.exports = require('./cjs/react-is.development.js');
}

}).call(this,require('_process'))
},{"./cjs/react-is.development.js":22,"./cjs/react-is.production.min.js":23,"_process":11}],25:[function(require,module,exports){
'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

function componentWillMount() {
  // Call this.constructor.gDSFP to support sub-classes.
  var state = this.constructor.getDerivedStateFromProps(this.props, this.state);
  if (state !== null && state !== undefined) {
    this.setState(state);
  }
}

function componentWillReceiveProps(nextProps) {
  // Call this.constructor.gDSFP to support sub-classes.
  // Use the setState() updater to ensure state isn't stale in certain edge cases.
  function updater(prevState) {
    var state = this.constructor.getDerivedStateFromProps(nextProps, prevState);
    return state !== null && state !== undefined ? state : null;
  }
  // Binding "this" is important for shallow renderer support.
  this.setState(updater.bind(this));
}

function componentWillUpdate(nextProps, nextState) {
  try {
    var prevProps = this.props;
    var prevState = this.state;
    this.props = nextProps;
    this.state = nextState;
    this.__reactInternalSnapshotFlag = true;
    this.__reactInternalSnapshot = this.getSnapshotBeforeUpdate(
      prevProps,
      prevState
    );
  } finally {
    this.props = prevProps;
    this.state = prevState;
  }
}

// React may warn about cWM/cWRP/cWU methods being deprecated.
// Add a flag to suppress these warnings for this special case.
componentWillMount.__suppressDeprecationWarning = true;
componentWillReceiveProps.__suppressDeprecationWarning = true;
componentWillUpdate.__suppressDeprecationWarning = true;

function polyfill(Component) {
  var prototype = Component.prototype;

  if (!prototype || !prototype.isReactComponent) {
    throw new Error('Can only polyfill class components');
  }

  if (
    typeof Component.getDerivedStateFromProps !== 'function' &&
    typeof prototype.getSnapshotBeforeUpdate !== 'function'
  ) {
    return Component;
  }

  // If new component APIs are defined, "unsafe" lifecycles won't be called.
  // Error if any of these lifecycles are present,
  // Because they would work differently between older and newer (16.3+) versions of React.
  var foundWillMountName = null;
  var foundWillReceivePropsName = null;
  var foundWillUpdateName = null;
  if (typeof prototype.componentWillMount === 'function') {
    foundWillMountName = 'componentWillMount';
  } else if (typeof prototype.UNSAFE_componentWillMount === 'function') {
    foundWillMountName = 'UNSAFE_componentWillMount';
  }
  if (typeof prototype.componentWillReceiveProps === 'function') {
    foundWillReceivePropsName = 'componentWillReceiveProps';
  } else if (typeof prototype.UNSAFE_componentWillReceiveProps === 'function') {
    foundWillReceivePropsName = 'UNSAFE_componentWillReceiveProps';
  }
  if (typeof prototype.componentWillUpdate === 'function') {
    foundWillUpdateName = 'componentWillUpdate';
  } else if (typeof prototype.UNSAFE_componentWillUpdate === 'function') {
    foundWillUpdateName = 'UNSAFE_componentWillUpdate';
  }
  if (
    foundWillMountName !== null ||
    foundWillReceivePropsName !== null ||
    foundWillUpdateName !== null
  ) {
    var componentName = Component.displayName || Component.name;
    var newApiName =
      typeof Component.getDerivedStateFromProps === 'function'
        ? 'getDerivedStateFromProps()'
        : 'getSnapshotBeforeUpdate()';

    throw Error(
      'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' +
        componentName +
        ' uses ' +
        newApiName +
        ' but also contains the following legacy lifecycles:' +
        (foundWillMountName !== null ? '\n  ' + foundWillMountName : '') +
        (foundWillReceivePropsName !== null
          ? '\n  ' + foundWillReceivePropsName
          : '') +
        (foundWillUpdateName !== null ? '\n  ' + foundWillUpdateName : '') +
        '\n\nThe above lifecycles should be removed. Learn more about this warning here:\n' +
        'https://fb.me/react-async-component-lifecycle-hooks'
    );
  }

  // React <= 16.2 does not support static getDerivedStateFromProps.
  // As a workaround, use cWM and cWRP to invoke the new static lifecycle.
  // Newer versions of React will ignore these lifecycles if gDSFP exists.
  if (typeof Component.getDerivedStateFromProps === 'function') {
    prototype.componentWillMount = componentWillMount;
    prototype.componentWillReceiveProps = componentWillReceiveProps;
  }

  // React <= 16.2 does not support getSnapshotBeforeUpdate.
  // As a workaround, use cWU to invoke the new lifecycle.
  // Newer versions of React will ignore that lifecycle if gSBU exists.
  if (typeof prototype.getSnapshotBeforeUpdate === 'function') {
    if (typeof prototype.componentDidUpdate !== 'function') {
      throw new Error(
        'Cannot polyfill getSnapshotBeforeUpdate() for components that do not define componentDidUpdate() on the prototype'
      );
    }

    prototype.componentWillUpdate = componentWillUpdate;

    var componentDidUpdate = prototype.componentDidUpdate;

    prototype.componentDidUpdate = function componentDidUpdatePolyfill(
      prevProps,
      prevState,
      maybeSnapshot
    ) {
      // 16.3+ will not execute our will-update method;
      // It will pass a snapshot value to did-update though.
      // Older versions will require our polyfilled will-update value.
      // We need to handle both cases, but can't just check for the presence of "maybeSnapshot",
      // Because for <= 15.x versions this might be a "prevContext" object.
      // We also can't just check "__reactInternalSnapshot",
      // Because get-snapshot might return a falsy value.
      // So check for the explicit __reactInternalSnapshotFlag flag to determine behavior.
      var snapshot = this.__reactInternalSnapshotFlag
        ? this.__reactInternalSnapshot
        : maybeSnapshot;

      componentDidUpdate.call(this, prevProps, prevState, snapshot);
    };
  }

  return Component;
}

exports.polyfill = polyfill;

},{}],26:[function(require,module,exports){
(function (process){
"use strict";

exports.__esModule = true;
exports.default = void 0;

var PropTypes = _interopRequireWildcard(require("prop-types"));

var _addClass = _interopRequireDefault(require("dom-helpers/class/addClass"));

var _removeClass = _interopRequireDefault(require("dom-helpers/class/removeClass"));

var _react = _interopRequireDefault(require("react"));

var _Transition = _interopRequireDefault(require("./Transition"));

var _PropTypes = require("./utils/PropTypes");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }

function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

var addClass = function addClass(node, classes) {
  return node && classes && classes.split(' ').forEach(function (c) {
    return (0, _addClass.default)(node, c);
  });
};

var removeClass = function removeClass(node, classes) {
  return node && classes && classes.split(' ').forEach(function (c) {
    return (0, _removeClass.default)(node, c);
  });
};
/**
 * A transition component inspired by the excellent
 * [ng-animate](http://www.nganimate.org/) library, you should use it if you're
 * using CSS transitions or animations. It's built upon the
 * [`Transition`](https://reactcommunity.org/react-transition-group/transition)
 * component, so it inherits all of its props.
 *
 * `CSSTransition` applies a pair of class names during the `appear`, `enter`,
 * and `exit` states of the transition. The first class is applied and then a
 * second `*-active` class in order to activate the CSSS transition. After the
 * transition, matching `*-done` class names are applied to persist the
 * transition state.
 *
 * ```jsx
 * function App() {
 *   const [inProp, setInProp] = useState(false);
 *   return (
 *     <div>
 *       <CSSTransition in={inProp} timeout={200} classNames="my-node">
 *         <div>
 *           {"I'll receive my-node-* classes"}
 *         </div>
 *       </CSSTransition>
 *       <button type="button" onClick={() => setInProp(true)}>
 *         Click to Enter
 *       </button>
 *     </div>
 *   );
 * }
 * ```
 *
 * When the `in` prop is set to `true`, the child component will first receive
 * the class `example-enter`, then the `example-enter-active` will be added in
 * the next tick. `CSSTransition` [forces a
 * reflow](https://github.com/reactjs/react-transition-group/blob/5007303e729a74be66a21c3e2205e4916821524b/src/CSSTransition.js#L208-L215)
 * between before adding the `example-enter-active`. This is an important trick
 * because it allows us to transition between `example-enter` and
 * `example-enter-active` even though they were added immediately one after
 * another. Most notably, this is what makes it possible for us to animate
 * _appearance_.
 *
 * ```css
 * .my-node-enter {
 *   opacity: 0;
 * }
 * .my-node-enter-active {
 *   opacity: 1;
 *   transition: opacity 200ms;
 * }
 * .my-node-exit {
 *   opacity: 1;
 * }
 * .my-node-exit-active {
 *   opacity: 0;
 *   transition: opacity: 200ms;
 * }
 * ```
 *
 * `*-active` classes represent which styles you want to animate **to**.
 */


var CSSTransition =
/*#__PURE__*/
function (_React$Component) {
  _inheritsLoose(CSSTransition, _React$Component);

  function CSSTransition() {
    var _this;

    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    _this = _React$Component.call.apply(_React$Component, [this].concat(args)) || this;

    _this.onEnter = function (node, appearing) {
      var _this$getClassNames = _this.getClassNames(appearing ? 'appear' : 'enter'),
          className = _this$getClassNames.className;

      _this.removeClasses(node, 'exit');

      addClass(node, className);

      if (_this.props.onEnter) {
        _this.props.onEnter(node, appearing);
      }
    };

    _this.onEntering = function (node, appearing) {
      var _this$getClassNames2 = _this.getClassNames(appearing ? 'appear' : 'enter'),
          activeClassName = _this$getClassNames2.activeClassName;

      _this.reflowAndAddClass(node, activeClassName);

      if (_this.props.onEntering) {
        _this.props.onEntering(node, appearing);
      }
    };

    _this.onEntered = function (node, appearing) {
      var appearClassName = _this.getClassNames('appear').doneClassName;

      var enterClassName = _this.getClassNames('enter').doneClassName;

      var doneClassName = appearing ? appearClassName + " " + enterClassName : enterClassName;

      _this.removeClasses(node, appearing ? 'appear' : 'enter');

      addClass(node, doneClassName);

      if (_this.props.onEntered) {
        _this.props.onEntered(node, appearing);
      }
    };

    _this.onExit = function (node) {
      var _this$getClassNames3 = _this.getClassNames('exit'),
          className = _this$getClassNames3.className;

      _this.removeClasses(node, 'appear');

      _this.removeClasses(node, 'enter');

      addClass(node, className);

      if (_this.props.onExit) {
        _this.props.onExit(node);
      }
    };

    _this.onExiting = function (node) {
      var _this$getClassNames4 = _this.getClassNames('exit'),
          activeClassName = _this$getClassNames4.activeClassName;

      _this.reflowAndAddClass(node, activeClassName);

      if (_this.props.onExiting) {
        _this.props.onExiting(node);
      }
    };

    _this.onExited = function (node) {
      var _this$getClassNames5 = _this.getClassNames('exit'),
          doneClassName = _this$getClassNames5.doneClassName;

      _this.removeClasses(node, 'exit');

      addClass(node, doneClassName);

      if (_this.props.onExited) {
        _this.props.onExited(node);
      }
    };

    _this.getClassNames = function (type) {
      var classNames = _this.props.classNames;
      var isStringClassNames = typeof classNames === 'string';
      var prefix = isStringClassNames && classNames ? classNames + '-' : '';
      var className = isStringClassNames ? prefix + type : classNames[type];
      var activeClassName = isStringClassNames ? className + '-active' : classNames[type + 'Active'];
      var doneClassName = isStringClassNames ? className + '-done' : classNames[type + 'Done'];
      return {
        className: className,
        activeClassName: activeClassName,
        doneClassName: doneClassName
      };
    };

    return _this;
  }

  var _proto = CSSTransition.prototype;

  _proto.removeClasses = function removeClasses(node, type) {
    var _this$getClassNames6 = this.getClassNames(type),
        className = _this$getClassNames6.className,
        activeClassName = _this$getClassNames6.activeClassName,
        doneClassName = _this$getClassNames6.doneClassName;

    className && removeClass(node, className);
    activeClassName && removeClass(node, activeClassName);
    doneClassName && removeClass(node, doneClassName);
  };

  _proto.reflowAndAddClass = function reflowAndAddClass(node, className) {
    // This is for to force a repaint,
    // which is necessary in order to transition styles when adding a class name.
    if (className) {
      /* eslint-disable no-unused-expressions */
      node && node.scrollTop;
      /* eslint-enable no-unused-expressions */

      addClass(node, className);
    }
  };

  _proto.render = function render() {
    var props = _extends({}, this.props);

    delete props.classNames;
    return _react.default.createElement(_Transition.default, _extends({}, props, {
      onEnter: this.onEnter,
      onEntered: this.onEntered,
      onEntering: this.onEntering,
      onExit: this.onExit,
      onExiting: this.onExiting,
      onExited: this.onExited
    }));
  };

  return CSSTransition;
}(_react.default.Component);

CSSTransition.defaultProps = {
  classNames: ''
};
CSSTransition.propTypes = process.env.NODE_ENV !== "production" ? _extends({}, _Transition.default.propTypes, {
  /**
   * The animation classNames applied to the component as it enters, exits or
   * has finished the transition. A single name can be provided and it will be
   * suffixed for each stage: e.g.
   *
   * `classNames="fade"` applies `fade-enter`, `fade-enter-active`,
   * `fade-enter-done`, `fade-exit`, `fade-exit-active`, `fade-exit-done`,
   * `fade-appear`, `fade-appear-active`, and `fade-appear-done`.
   *
   * **Note**: `fade-appear-done` and `fade-enter-done` will _both_ be applied.
   * This allows you to define different behavior for when appearing is done and
   * when regular entering is done, using selectors like
   * `.fade-enter-done:not(.fade-appear-done)`. For example, you could apply an
   * epic entrance animation when element first appears in the DOM using
   * [Animate.css](https://daneden.github.io/animate.css/). Otherwise you can
   * simply use `fade-enter-done` for defining both cases.
   *
   * Each individual classNames can also be specified independently like:
   *
   * ```js
   * classNames={{
   *  appear: 'my-appear',
   *  appearActive: 'my-active-appear',
   *  appearDone: 'my-done-appear',
   *  enter: 'my-enter',
   *  enterActive: 'my-active-enter',
   *  enterDone: 'my-done-enter',
   *  exit: 'my-exit',
   *  exitActive: 'my-active-exit',
   *  exitDone: 'my-done-exit',
   * }}
   * ```
   *
   * If you want to set these classes using CSS Modules:
   *
   * ```js
   * import styles from './styles.css';
   * ```
   *
   * you might want to use camelCase in your CSS file, that way could simply
   * spread them instead of listing them one by one:
   *
   * ```js
   * classNames={{ ...styles }}
   * ```
   *
   * @type {string | {
   *  appear?: string,
   *  appearActive?: string,
   *  appearDone?: string,
   *  enter?: string,
   *  enterActive?: string,
   *  enterDone?: string,
   *  exit?: string,
   *  exitActive?: string,
   *  exitDone?: string,
   * }}
   */
  classNames: _PropTypes.classNamesShape,

  /**
   * A `<Transition>` callback fired immediately after the 'enter' or 'appear' class is
   * applied.
   *
   * @type Function(node: HtmlElement, isAppearing: bool)
   */
  onEnter: PropTypes.func,

  /**
   * A `<Transition>` callback fired immediately after the 'enter-active' or
   * 'appear-active' class is applied.
   *
   * @type Function(node: HtmlElement, isAppearing: bool)
   */
  onEntering: PropTypes.func,

  /**
   * A `<Transition>` callback fired immediately after the 'enter' or
   * 'appear' classes are **removed** and the `done` class is added to the DOM node.
   *
   * @type Function(node: HtmlElement, isAppearing: bool)
   */
  onEntered: PropTypes.func,

  /**
   * A `<Transition>` callback fired immediately after the 'exit' class is
   * applied.
   *
   * @type Function(node: HtmlElement)
   */
  onExit: PropTypes.func,

  /**
   * A `<Transition>` callback fired immediately after the 'exit-active' is applied.
   *
   * @type Function(node: HtmlElement)
   */
  onExiting: PropTypes.func,

  /**
   * A `<Transition>` callback fired immediately after the 'exit' classes
   * are **removed** and the `exit-done` class is added to the DOM node.
   *
   * @type Function(node: HtmlElement)
   */
  onExited: PropTypes.func
}) : {};
var _default = CSSTransition;
exports.default = _default;
module.exports = exports["default"];
}).call(this,require('_process'))
},{"./Transition":28,"./utils/PropTypes":32,"_process":11,"dom-helpers/class/addClass":7,"dom-helpers/class/removeClass":9,"prop-types":15,"react":35}],27:[function(require,module,exports){
(function (process){
"use strict";

exports.__esModule = true;
exports.default = void 0;

var _propTypes = _interopRequireDefault(require("prop-types"));

var _react = _interopRequireDefault(require("react"));

var _reactDom = require("react-dom");

var _TransitionGroup = _interopRequireDefault(require("./TransitionGroup"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

/**
 * The `<ReplaceTransition>` component is a specialized `Transition` component
 * that animates between two children.
 *
 * ```jsx
 * <ReplaceTransition in>
 *   <Fade><div>I appear first</div></Fade>
 *   <Fade><div>I replace the above</div></Fade>
 * </ReplaceTransition>
 * ```
 */
var ReplaceTransition =
/*#__PURE__*/
function (_React$Component) {
  _inheritsLoose(ReplaceTransition, _React$Component);

  function ReplaceTransition() {
    var _this;

    for (var _len = arguments.length, _args = new Array(_len), _key = 0; _key < _len; _key++) {
      _args[_key] = arguments[_key];
    }

    _this = _React$Component.call.apply(_React$Component, [this].concat(_args)) || this;

    _this.handleEnter = function () {
      for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
        args[_key2] = arguments[_key2];
      }

      return _this.handleLifecycle('onEnter', 0, args);
    };

    _this.handleEntering = function () {
      for (var _len3 = arguments.length, args = new Array(_len3), _key3 = 0; _key3 < _len3; _key3++) {
        args[_key3] = arguments[_key3];
      }

      return _this.handleLifecycle('onEntering', 0, args);
    };

    _this.handleEntered = function () {
      for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
        args[_key4] = arguments[_key4];
      }

      return _this.handleLifecycle('onEntered', 0, args);
    };

    _this.handleExit = function () {
      for (var _len5 = arguments.length, args = new Array(_len5), _key5 = 0; _key5 < _len5; _key5++) {
        args[_key5] = arguments[_key5];
      }

      return _this.handleLifecycle('onExit', 1, args);
    };

    _this.handleExiting = function () {
      for (var _len6 = arguments.length, args = new Array(_len6), _key6 = 0; _key6 < _len6; _key6++) {
        args[_key6] = arguments[_key6];
      }

      return _this.handleLifecycle('onExiting', 1, args);
    };

    _this.handleExited = function () {
      for (var _len7 = arguments.length, args = new Array(_len7), _key7 = 0; _key7 < _len7; _key7++) {
        args[_key7] = arguments[_key7];
      }

      return _this.handleLifecycle('onExited', 1, args);
    };

    return _this;
  }

  var _proto = ReplaceTransition.prototype;

  _proto.handleLifecycle = function handleLifecycle(handler, idx, originalArgs) {
    var _child$props;

    var children = this.props.children;

    var child = _react.default.Children.toArray(children)[idx];

    if (child.props[handler]) (_child$props = child.props)[handler].apply(_child$props, originalArgs);
    if (this.props[handler]) this.props[handler]((0, _reactDom.findDOMNode)(this));
  };

  _proto.render = function render() {
    var _this$props = this.props,
        children = _this$props.children,
        inProp = _this$props.in,
        props = _objectWithoutPropertiesLoose(_this$props, ["children", "in"]);

    var _React$Children$toArr = _react.default.Children.toArray(children),
        first = _React$Children$toArr[0],
        second = _React$Children$toArr[1];

    delete props.onEnter;
    delete props.onEntering;
    delete props.onEntered;
    delete props.onExit;
    delete props.onExiting;
    delete props.onExited;
    return _react.default.createElement(_TransitionGroup.default, props, inProp ? _react.default.cloneElement(first, {
      key: 'first',
      onEnter: this.handleEnter,
      onEntering: this.handleEntering,
      onEntered: this.handleEntered
    }) : _react.default.cloneElement(second, {
      key: 'second',
      onEnter: this.handleExit,
      onEntering: this.handleExiting,
      onEntered: this.handleExited
    }));
  };

  return ReplaceTransition;
}(_react.default.Component);

ReplaceTransition.propTypes = process.env.NODE_ENV !== "production" ? {
  in: _propTypes.default.bool.isRequired,
  children: function children(props, propName) {
    if (_react.default.Children.count(props[propName]) !== 2) return new Error("\"" + propName + "\" must be exactly two transition components.");
    return null;
  }
} : {};
var _default = ReplaceTransition;
exports.default = _default;
module.exports = exports["default"];
}).call(this,require('_process'))
},{"./TransitionGroup":29,"_process":11,"prop-types":15,"react":35,"react-dom":21}],28:[function(require,module,exports){
(function (process){
"use strict";

exports.__esModule = true;
exports.default = exports.EXITING = exports.ENTERED = exports.ENTERING = exports.EXITED = exports.UNMOUNTED = void 0;

var PropTypes = _interopRequireWildcard(require("prop-types"));

var _react = _interopRequireDefault(require("react"));

var _reactDom = _interopRequireDefault(require("react-dom"));

var _reactLifecyclesCompat = require("react-lifecycles-compat");

var _PropTypes = require("./utils/PropTypes");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }

function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

var UNMOUNTED = 'unmounted';
exports.UNMOUNTED = UNMOUNTED;
var EXITED = 'exited';
exports.EXITED = EXITED;
var ENTERING = 'entering';
exports.ENTERING = ENTERING;
var ENTERED = 'entered';
exports.ENTERED = ENTERED;
var EXITING = 'exiting';
/**
 * The Transition component lets you describe a transition from one component
 * state to another _over time_ with a simple declarative API. Most commonly
 * it's used to animate the mounting and unmounting of a component, but can also
 * be used to describe in-place transition states as well.
 *
 * ---
 *
 * **Note**: `Transition` is a platform-agnostic base component. If you're using
 * transitions in CSS, you'll probably want to use
 * [`CSSTransition`](https://reactcommunity.org/react-transition-group/css-transition)
 * instead. It inherits all the features of `Transition`, but contains
 * additional features necessary to play nice with CSS transitions (hence the
 * name of the component).
 *
 * ---
 *
 * By default the `Transition` component does not alter the behavior of the
 * component it renders, it only tracks "enter" and "exit" states for the
 * components. It's up to you to give meaning and effect to those states. For
 * example we can add styles to a component when it enters or exits:
 *
 * ```jsx
 * import { Transition } from 'react-transition-group';
 *
 * const duration = 300;
 *
 * const defaultStyle = {
 *   transition: `opacity ${duration}ms ease-in-out`,
 *   opacity: 0,
 * }
 *
 * const transitionStyles = {
 *   entering: { opacity: 0 },
 *   entered:  { opacity: 1 },
 * };
 *
 * const Fade = ({ in: inProp }) => (
 *   <Transition in={inProp} timeout={duration}>
 *     {state => (
 *       <div style={{
 *         ...defaultStyle,
 *         ...transitionStyles[state]
 *       }}>
 *         I'm a fade Transition!
 *       </div>
 *     )}
 *   </Transition>
 * );
 * ```
 *
 * There are 4 main states a Transition can be in:
 *  - `'entering'`
 *  - `'entered'`
 *  - `'exiting'`
 *  - `'exited'`
 *
 * Transition state is toggled via the `in` prop. When `true` the component
 * begins the "Enter" stage. During this stage, the component will shift from
 * its current transition state, to `'entering'` for the duration of the
 * transition and then to the `'entered'` stage once it's complete. Let's take
 * the following example (we'll use the
 * [useState](https://reactjs.org/docs/hooks-reference.html#usestate) hook):
 *
 * ```jsx
 * function App() {
 *   const [inProp, setInProp] = useState(false);
 *   return (
 *     <div>
 *       <Transition in={inProp} timeout={500}>
 *         {state => (
 *           // ...
 *         )}
 *       </Transition>
 *       <button onClick={() => setInProp(true)}>
 *         Click to Enter
 *       </button>
 *     </div>
 *   );
 * }
 * ```
 *
 * When the button is clicked the component will shift to the `'entering'` state
 * and stay there for 500ms (the value of `timeout`) before it finally switches
 * to `'entered'`.
 *
 * When `in` is `false` the same thing happens except the state moves from
 * `'exiting'` to `'exited'`.
 */

exports.EXITING = EXITING;

var Transition =
/*#__PURE__*/
function (_React$Component) {
  _inheritsLoose(Transition, _React$Component);

  function Transition(props, context) {
    var _this;

    _this = _React$Component.call(this, props, context) || this;
    var parentGroup = context.transitionGroup; // In the context of a TransitionGroup all enters are really appears

    var appear = parentGroup && !parentGroup.isMounting ? props.enter : props.appear;
    var initialStatus;
    _this.appearStatus = null;

    if (props.in) {
      if (appear) {
        initialStatus = EXITED;
        _this.appearStatus = ENTERING;
      } else {
        initialStatus = ENTERED;
      }
    } else {
      if (props.unmountOnExit || props.mountOnEnter) {
        initialStatus = UNMOUNTED;
      } else {
        initialStatus = EXITED;
      }
    }

    _this.state = {
      status: initialStatus
    };
    _this.nextCallback = null;
    return _this;
  }

  var _proto = Transition.prototype;

  _proto.getChildContext = function getChildContext() {
    return {
      transitionGroup: null // allows for nested Transitions

    };
  };

  Transition.getDerivedStateFromProps = function getDerivedStateFromProps(_ref, prevState) {
    var nextIn = _ref.in;

    if (nextIn && prevState.status === UNMOUNTED) {
      return {
        status: EXITED
      };
    }

    return null;
  }; // getSnapshotBeforeUpdate(prevProps) {
  //   let nextStatus = null
  //   if (prevProps !== this.props) {
  //     const { status } = this.state
  //     if (this.props.in) {
  //       if (status !== ENTERING && status !== ENTERED) {
  //         nextStatus = ENTERING
  //       }
  //     } else {
  //       if (status === ENTERING || status === ENTERED) {
  //         nextStatus = EXITING
  //       }
  //     }
  //   }
  //   return { nextStatus }
  // }


  _proto.componentDidMount = function componentDidMount() {
    this.updateStatus(true, this.appearStatus);
  };

  _proto.componentDidUpdate = function componentDidUpdate(prevProps) {
    var nextStatus = null;

    if (prevProps !== this.props) {
      var status = this.state.status;

      if (this.props.in) {
        if (status !== ENTERING && status !== ENTERED) {
          nextStatus = ENTERING;
        }
      } else {
        if (status === ENTERING || status === ENTERED) {
          nextStatus = EXITING;
        }
      }
    }

    this.updateStatus(false, nextStatus);
  };

  _proto.componentWillUnmount = function componentWillUnmount() {
    this.cancelNextCallback();
  };

  _proto.getTimeouts = function getTimeouts() {
    var timeout = this.props.timeout;
    var exit, enter, appear;
    exit = enter = appear = timeout;

    if (timeout != null && typeof timeout !== 'number') {
      exit = timeout.exit;
      enter = timeout.enter; // TODO: remove fallback for next major

      appear = timeout.appear !== undefined ? timeout.appear : enter;
    }

    return {
      exit: exit,
      enter: enter,
      appear: appear
    };
  };

  _proto.updateStatus = function updateStatus(mounting, nextStatus) {
    if (mounting === void 0) {
      mounting = false;
    }

    if (nextStatus !== null) {
      // nextStatus will always be ENTERING or EXITING.
      this.cancelNextCallback();

      var node = _reactDom.default.findDOMNode(this);

      if (nextStatus === ENTERING) {
        this.performEnter(node, mounting);
      } else {
        this.performExit(node);
      }
    } else if (this.props.unmountOnExit && this.state.status === EXITED) {
      this.setState({
        status: UNMOUNTED
      });
    }
  };

  _proto.performEnter = function performEnter(node, mounting) {
    var _this2 = this;

    var enter = this.props.enter;
    var appearing = this.context.transitionGroup ? this.context.transitionGroup.isMounting : mounting;
    var timeouts = this.getTimeouts();
    var enterTimeout = appearing ? timeouts.appear : timeouts.enter; // no enter animation skip right to ENTERED
    // if we are mounting and running this it means appear _must_ be set

    if (!mounting && !enter) {
      this.safeSetState({
        status: ENTERED
      }, function () {
        _this2.props.onEntered(node);
      });
      return;
    }

    this.props.onEnter(node, appearing);
    this.safeSetState({
      status: ENTERING
    }, function () {
      _this2.props.onEntering(node, appearing);

      _this2.onTransitionEnd(node, enterTimeout, function () {
        _this2.safeSetState({
          status: ENTERED
        }, function () {
          _this2.props.onEntered(node, appearing);
        });
      });
    });
  };

  _proto.performExit = function performExit(node) {
    var _this3 = this;

    var exit = this.props.exit;
    var timeouts = this.getTimeouts(); // no exit animation skip right to EXITED

    if (!exit) {
      this.safeSetState({
        status: EXITED
      }, function () {
        _this3.props.onExited(node);
      });
      return;
    }

    this.props.onExit(node);
    this.safeSetState({
      status: EXITING
    }, function () {
      _this3.props.onExiting(node);

      _this3.onTransitionEnd(node, timeouts.exit, function () {
        _this3.safeSetState({
          status: EXITED
        }, function () {
          _this3.props.onExited(node);
        });
      });
    });
  };

  _proto.cancelNextCallback = function cancelNextCallback() {
    if (this.nextCallback !== null) {
      this.nextCallback.cancel();
      this.nextCallback = null;
    }
  };

  _proto.safeSetState = function safeSetState(nextState, callback) {
    // This shouldn't be necessary, but there are weird race conditions with
    // setState callbacks and unmounting in testing, so always make sure that
    // we can cancel any pending setState callbacks after we unmount.
    callback = this.setNextCallback(callback);
    this.setState(nextState, callback);
  };

  _proto.setNextCallback = function setNextCallback(callback) {
    var _this4 = this;

    var active = true;

    this.nextCallback = function (event) {
      if (active) {
        active = false;
        _this4.nextCallback = null;
        callback(event);
      }
    };

    this.nextCallback.cancel = function () {
      active = false;
    };

    return this.nextCallback;
  };

  _proto.onTransitionEnd = function onTransitionEnd(node, timeout, handler) {
    this.setNextCallback(handler);
    var doesNotHaveTimeoutOrListener = timeout == null && !this.props.addEndListener;

    if (!node || doesNotHaveTimeoutOrListener) {
      setTimeout(this.nextCallback, 0);
      return;
    }

    if (this.props.addEndListener) {
      this.props.addEndListener(node, this.nextCallback);
    }

    if (timeout != null) {
      setTimeout(this.nextCallback, timeout);
    }
  };

  _proto.render = function render() {
    var status = this.state.status;

    if (status === UNMOUNTED) {
      return null;
    }

    var _this$props = this.props,
        children = _this$props.children,
        childProps = _objectWithoutPropertiesLoose(_this$props, ["children"]); // filter props for Transtition


    delete childProps.in;
    delete childProps.mountOnEnter;
    delete childProps.unmountOnExit;
    delete childProps.appear;
    delete childProps.enter;
    delete childProps.exit;
    delete childProps.timeout;
    delete childProps.addEndListener;
    delete childProps.onEnter;
    delete childProps.onEntering;
    delete childProps.onEntered;
    delete childProps.onExit;
    delete childProps.onExiting;
    delete childProps.onExited;

    if (typeof children === 'function') {
      return children(status, childProps);
    }

    var child = _react.default.Children.only(children);

    return _react.default.cloneElement(child, childProps);
  };

  return Transition;
}(_react.default.Component);

Transition.contextTypes = {
  transitionGroup: PropTypes.object
};
Transition.childContextTypes = {
  transitionGroup: function transitionGroup() {}
};
Transition.propTypes = process.env.NODE_ENV !== "production" ? {
  /**
   * A `function` child can be used instead of a React element. This function is
   * called with the current transition status (`'entering'`, `'entered'`,
   * `'exiting'`, `'exited'`, `'unmounted'`), which can be used to apply context
   * specific props to a component.
   *
   * ```jsx
   * <Transition in={this.state.in} timeout={150}>
   *   {state => (
   *     <MyComponent className={`fade fade-${state}`} />
   *   )}
   * </Transition>
   * ```
   */
  children: PropTypes.oneOfType([PropTypes.func.isRequired, PropTypes.element.isRequired]).isRequired,

  /**
   * Show the component; triggers the enter or exit states
   */
  in: PropTypes.bool,

  /**
   * By default the child component is mounted immediately along with
   * the parent `Transition` component. If you want to "lazy mount" the component on the
   * first `in={true}` you can set `mountOnEnter`. After the first enter transition the component will stay
   * mounted, even on "exited", unless you also specify `unmountOnExit`.
   */
  mountOnEnter: PropTypes.bool,

  /**
   * By default the child component stays mounted after it reaches the `'exited'` state.
   * Set `unmountOnExit` if you'd prefer to unmount the component after it finishes exiting.
   */
  unmountOnExit: PropTypes.bool,

  /**
   * Normally a component is not transitioned if it is shown when the `<Transition>` component mounts.
   * If you want to transition on the first mount set `appear` to `true`, and the
   * component will transition in as soon as the `<Transition>` mounts.
   *
   * > Note: there are no specific "appear" states. `appear` only adds an additional `enter` transition.
   */
  appear: PropTypes.bool,

  /**
   * Enable or disable enter transitions.
   */
  enter: PropTypes.bool,

  /**
   * Enable or disable exit transitions.
   */
  exit: PropTypes.bool,

  /**
   * The duration of the transition, in milliseconds.
   * Required unless `addEndListener` is provided.
   *
   * You may specify a single timeout for all transitions:
   *
   * ```jsx
   * timeout={500}
   * ```
   *
   * or individually:
   *
   * ```jsx
   * timeout={{
   *  appear: 500,
   *  enter: 300,
   *  exit: 500,
   * }}
   * ```
   *
   * - `appear` defaults to the value of `enter`
   * - `enter` defaults to `0`
   * - `exit` defaults to `0`
   *
   * @type {number | { enter?: number, exit?: number, appear?: number }}
   */
  timeout: function timeout(props) {
    var pt = _PropTypes.timeoutsShape;
    if (!props.addEndListener) pt = pt.isRequired;

    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      args[_key - 1] = arguments[_key];
    }

    return pt.apply(void 0, [props].concat(args));
  },

  /**
   * Add a custom transition end trigger. Called with the transitioning
   * DOM node and a `done` callback. Allows for more fine grained transition end
   * logic. **Note:** Timeouts are still used as a fallback if provided.
   *
   * ```jsx
   * addEndListener={(node, done) => {
   *   // use the css transitionend event to mark the finish of a transition
   *   node.addEventListener('transitionend', done, false);
   * }}
   * ```
   */
  addEndListener: PropTypes.func,

  /**
   * Callback fired before the "entering" status is applied. An extra parameter
   * `isAppearing` is supplied to indicate if the enter stage is occurring on the initial mount
   *
   * @type Function(node: HtmlElement, isAppearing: bool) -> void
   */
  onEnter: PropTypes.func,

  /**
   * Callback fired after the "entering" status is applied. An extra parameter
   * `isAppearing` is supplied to indicate if the enter stage is occurring on the initial mount
   *
   * @type Function(node: HtmlElement, isAppearing: bool)
   */
  onEntering: PropTypes.func,

  /**
   * Callback fired after the "entered" status is applied. An extra parameter
   * `isAppearing` is supplied to indicate if the enter stage is occurring on the initial mount
   *
   * @type Function(node: HtmlElement, isAppearing: bool) -> void
   */
  onEntered: PropTypes.func,

  /**
   * Callback fired before the "exiting" status is applied.
   *
   * @type Function(node: HtmlElement) -> void
   */
  onExit: PropTypes.func,

  /**
   * Callback fired after the "exiting" status is applied.
   *
   * @type Function(node: HtmlElement) -> void
   */
  onExiting: PropTypes.func,

  /**
   * Callback fired after the "exited" status is applied.
   *
   * @type Function(node: HtmlElement) -> void
   */
  onExited: PropTypes.func // Name the function so it is clearer in the documentation

} : {};

function noop() {}

Transition.defaultProps = {
  in: false,
  mountOnEnter: false,
  unmountOnExit: false,
  appear: false,
  enter: true,
  exit: true,
  onEnter: noop,
  onEntering: noop,
  onEntered: noop,
  onExit: noop,
  onExiting: noop,
  onExited: noop
};
Transition.UNMOUNTED = 0;
Transition.EXITED = 1;
Transition.ENTERING = 2;
Transition.ENTERED = 3;
Transition.EXITING = 4;

var _default = (0, _reactLifecyclesCompat.polyfill)(Transition);

exports.default = _default;
}).call(this,require('_process'))
},{"./utils/PropTypes":32,"_process":11,"prop-types":15,"react":35,"react-dom":21,"react-lifecycles-compat":25}],29:[function(require,module,exports){
(function (process){
"use strict";

exports.__esModule = true;
exports.default = void 0;

var _propTypes = _interopRequireDefault(require("prop-types"));

var _react = _interopRequireDefault(require("react"));

var _reactLifecyclesCompat = require("react-lifecycles-compat");

var _ChildMapping = require("./utils/ChildMapping");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }

function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }

function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }

var values = Object.values || function (obj) {
  return Object.keys(obj).map(function (k) {
    return obj[k];
  });
};

var defaultProps = {
  component: 'div',
  childFactory: function childFactory(child) {
    return child;
  }
  /**
   * The `<TransitionGroup>` component manages a set of transition components
   * (`<Transition>` and `<CSSTransition>`) in a list. Like with the transition
   * components, `<TransitionGroup>` is a state machine for managing the mounting
   * and unmounting of components over time.
   *
   * Consider the example below. As items are removed or added to the TodoList the
   * `in` prop is toggled automatically by the `<TransitionGroup>`.
   *
   * Note that `<TransitionGroup>`  does not define any animation behavior!
   * Exactly _how_ a list item animates is up to the individual transition
   * component. This means you can mix and match animations across different list
   * items.
   */

};

var TransitionGroup =
/*#__PURE__*/
function (_React$Component) {
  _inheritsLoose(TransitionGroup, _React$Component);

  function TransitionGroup(props, context) {
    var _this;

    _this = _React$Component.call(this, props, context) || this;

    var handleExited = _this.handleExited.bind(_assertThisInitialized(_assertThisInitialized(_this))); // Initial children should all be entering, dependent on appear


    _this.state = {
      handleExited: handleExited,
      firstRender: true
    };
    return _this;
  }

  var _proto = TransitionGroup.prototype;

  _proto.getChildContext = function getChildContext() {
    return {
      transitionGroup: {
        isMounting: !this.appeared
      }
    };
  };

  _proto.componentDidMount = function componentDidMount() {
    this.appeared = true;
    this.mounted = true;
  };

  _proto.componentWillUnmount = function componentWillUnmount() {
    this.mounted = false;
  };

  TransitionGroup.getDerivedStateFromProps = function getDerivedStateFromProps(nextProps, _ref) {
    var prevChildMapping = _ref.children,
        handleExited = _ref.handleExited,
        firstRender = _ref.firstRender;
    return {
      children: firstRender ? (0, _ChildMapping.getInitialChildMapping)(nextProps, handleExited) : (0, _ChildMapping.getNextChildMapping)(nextProps, prevChildMapping, handleExited),
      firstRender: false
    };
  };

  _proto.handleExited = function handleExited(child, node) {
    var currentChildMapping = (0, _ChildMapping.getChildMapping)(this.props.children);
    if (child.key in currentChildMapping) return;

    if (child.props.onExited) {
      child.props.onExited(node);
    }

    if (this.mounted) {
      this.setState(function (state) {
        var children = _extends({}, state.children);

        delete children[child.key];
        return {
          children: children
        };
      });
    }
  };

  _proto.render = function render() {
    var _this$props = this.props,
        Component = _this$props.component,
        childFactory = _this$props.childFactory,
        props = _objectWithoutPropertiesLoose(_this$props, ["component", "childFactory"]);

    var children = values(this.state.children).map(childFactory);
    delete props.appear;
    delete props.enter;
    delete props.exit;

    if (Component === null) {
      return children;
    }

    return _react.default.createElement(Component, props, children);
  };

  return TransitionGroup;
}(_react.default.Component);

TransitionGroup.childContextTypes = {
  transitionGroup: _propTypes.default.object.isRequired
};
TransitionGroup.propTypes = process.env.NODE_ENV !== "production" ? {
  /**
   * `<TransitionGroup>` renders a `<div>` by default. You can change this
   * behavior by providing a `component` prop.
   * If you use React v16+ and would like to avoid a wrapping `<div>` element
   * you can pass in `component={null}`. This is useful if the wrapping div
   * borks your css styles.
   */
  component: _propTypes.default.any,

  /**
   * A set of `<Transition>` components, that are toggled `in` and out as they
   * leave. the `<TransitionGroup>` will inject specific transition props, so
   * remember to spread them through if you are wrapping the `<Transition>` as
   * with our `<Fade>` example.
   *
   * While this component is meant for multiple `Transition` or `CSSTransition`
   * children, sometimes you may want to have a single transition child with
   * content that you want to be transitioned out and in when you change it
   * (e.g. routes, images etc.) In that case you can change the `key` prop of
   * the transition child as you change its content, this will cause
   * `TransitionGroup` to transition the child out and back in.
   */
  children: _propTypes.default.node,

  /**
   * A convenience prop that enables or disables appear animations
   * for all children. Note that specifying this will override any defaults set
   * on individual children Transitions.
   */
  appear: _propTypes.default.bool,

  /**
   * A convenience prop that enables or disables enter animations
   * for all children. Note that specifying this will override any defaults set
   * on individual children Transitions.
   */
  enter: _propTypes.default.bool,

  /**
   * A convenience prop that enables or disables exit animations
   * for all children. Note that specifying this will override any defaults set
   * on individual children Transitions.
   */
  exit: _propTypes.default.bool,

  /**
   * You may need to apply reactive updates to a child as it is exiting.
   * This is generally done by using `cloneElement` however in the case of an exiting
   * child the element has already been removed and not accessible to the consumer.
   *
   * If you do need to update a child as it leaves you can provide a `childFactory`
   * to wrap every child, even the ones that are leaving.
   *
   * @type Function(child: ReactElement) -> ReactElement
   */
  childFactory: _propTypes.default.func
} : {};
TransitionGroup.defaultProps = defaultProps;

var _default = (0, _reactLifecyclesCompat.polyfill)(TransitionGroup);

exports.default = _default;
module.exports = exports["default"];
}).call(this,require('_process'))
},{"./utils/ChildMapping":31,"_process":11,"prop-types":15,"react":35,"react-lifecycles-compat":25}],30:[function(require,module,exports){
"use strict";

var _CSSTransition = _interopRequireDefault(require("./CSSTransition"));

var _ReplaceTransition = _interopRequireDefault(require("./ReplaceTransition"));

var _TransitionGroup = _interopRequireDefault(require("./TransitionGroup"));

var _Transition = _interopRequireDefault(require("./Transition"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

module.exports = {
  Transition: _Transition.default,
  TransitionGroup: _TransitionGroup.default,
  ReplaceTransition: _ReplaceTransition.default,
  CSSTransition: _CSSTransition.default
};
},{"./CSSTransition":26,"./ReplaceTransition":27,"./Transition":28,"./TransitionGroup":29}],31:[function(require,module,exports){
"use strict";

exports.__esModule = true;
exports.getChildMapping = getChildMapping;
exports.mergeChildMappings = mergeChildMappings;
exports.getInitialChildMapping = getInitialChildMapping;
exports.getNextChildMapping = getNextChildMapping;

var _react = require("react");

/**
 * Given `this.props.children`, return an object mapping key to child.
 *
 * @param {*} children `this.props.children`
 * @return {object} Mapping of key to child
 */
function getChildMapping(children, mapFn) {
  var mapper = function mapper(child) {
    return mapFn && (0, _react.isValidElement)(child) ? mapFn(child) : child;
  };

  var result = Object.create(null);
  if (children) _react.Children.map(children, function (c) {
    return c;
  }).forEach(function (child) {
    // run the map function here instead so that the key is the computed one
    result[child.key] = mapper(child);
  });
  return result;
}
/**
 * When you're adding or removing children some may be added or removed in the
 * same render pass. We want to show *both* since we want to simultaneously
 * animate elements in and out. This function takes a previous set of keys
 * and a new set of keys and merges them with its best guess of the correct
 * ordering. In the future we may expose some of the utilities in
 * ReactMultiChild to make this easy, but for now React itself does not
 * directly have this concept of the union of prevChildren and nextChildren
 * so we implement it here.
 *
 * @param {object} prev prev children as returned from
 * `ReactTransitionChildMapping.getChildMapping()`.
 * @param {object} next next children as returned from
 * `ReactTransitionChildMapping.getChildMapping()`.
 * @return {object} a key set that contains all keys in `prev` and all keys
 * in `next` in a reasonable order.
 */


function mergeChildMappings(prev, next) {
  prev = prev || {};
  next = next || {};

  function getValueForKey(key) {
    return key in next ? next[key] : prev[key];
  } // For each key of `next`, the list of keys to insert before that key in
  // the combined list


  var nextKeysPending = Object.create(null);
  var pendingKeys = [];

  for (var prevKey in prev) {
    if (prevKey in next) {
      if (pendingKeys.length) {
        nextKeysPending[prevKey] = pendingKeys;
        pendingKeys = [];
      }
    } else {
      pendingKeys.push(prevKey);
    }
  }

  var i;
  var childMapping = {};

  for (var nextKey in next) {
    if (nextKeysPending[nextKey]) {
      for (i = 0; i < nextKeysPending[nextKey].length; i++) {
        var pendingNextKey = nextKeysPending[nextKey][i];
        childMapping[nextKeysPending[nextKey][i]] = getValueForKey(pendingNextKey);
      }
    }

    childMapping[nextKey] = getValueForKey(nextKey);
  } // Finally, add the keys which didn't appear before any key in `next`


  for (i = 0; i < pendingKeys.length; i++) {
    childMapping[pendingKeys[i]] = getValueForKey(pendingKeys[i]);
  }

  return childMapping;
}

function getProp(child, prop, props) {
  return props[prop] != null ? props[prop] : child.props[prop];
}

function getInitialChildMapping(props, onExited) {
  return getChildMapping(props.children, function (child) {
    return (0, _react.cloneElement)(child, {
      onExited: onExited.bind(null, child),
      in: true,
      appear: getProp(child, 'appear', props),
      enter: getProp(child, 'enter', props),
      exit: getProp(child, 'exit', props)
    });
  });
}

function getNextChildMapping(nextProps, prevChildMapping, onExited) {
  var nextChildMapping = getChildMapping(nextProps.children);
  var children = mergeChildMappings(prevChildMapping, nextChildMapping);
  Object.keys(children).forEach(function (key) {
    var child = children[key];
    if (!(0, _react.isValidElement)(child)) return;
    var hasPrev = key in prevChildMapping;
    var hasNext = key in nextChildMapping;
    var prevChild = prevChildMapping[key];
    var isLeaving = (0, _react.isValidElement)(prevChild) && !prevChild.props.in; // item is new (entering)

    if (hasNext && (!hasPrev || isLeaving)) {
      // console.log('entering', key)
      children[key] = (0, _react.cloneElement)(child, {
        onExited: onExited.bind(null, child),
        in: true,
        exit: getProp(child, 'exit', nextProps),
        enter: getProp(child, 'enter', nextProps)
      });
    } else if (!hasNext && hasPrev && !isLeaving) {
      // item is old (exiting)
      // console.log('leaving', key)
      children[key] = (0, _react.cloneElement)(child, {
        in: false
      });
    } else if (hasNext && hasPrev && (0, _react.isValidElement)(prevChild)) {
      // item hasn't changed transition states
      // copy over the last transition props;
      // console.log('unchanged', key)
      children[key] = (0, _react.cloneElement)(child, {
        onExited: onExited.bind(null, child),
        in: prevChild.props.in,
        exit: getProp(child, 'exit', nextProps),
        enter: getProp(child, 'enter', nextProps)
      });
    }
  });
  return children;
}
},{"react":35}],32:[function(require,module,exports){
(function (process){
"use strict";

exports.__esModule = true;
exports.classNamesShape = exports.timeoutsShape = void 0;

var _propTypes = _interopRequireDefault(require("prop-types"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var timeoutsShape = process.env.NODE_ENV !== 'production' ? _propTypes.default.oneOfType([_propTypes.default.number, _propTypes.default.shape({
  enter: _propTypes.default.number,
  exit: _propTypes.default.number,
  appear: _propTypes.default.number
}).isRequired]) : null;
exports.timeoutsShape = timeoutsShape;
var classNamesShape = process.env.NODE_ENV !== 'production' ? _propTypes.default.oneOfType([_propTypes.default.string, _propTypes.default.shape({
  enter: _propTypes.default.string,
  exit: _propTypes.default.string,
  active: _propTypes.default.string
}), _propTypes.default.shape({
  enter: _propTypes.default.string,
  enterDone: _propTypes.default.string,
  enterActive: _propTypes.default.string,
  exit: _propTypes.default.string,
  exitDone: _propTypes.default.string,
  exitActive: _propTypes.default.string
})]) : null;
exports.classNamesShape = classNamesShape;
}).call(this,require('_process'))
},{"_process":11,"prop-types":15}],33:[function(require,module,exports){
(function (process){
/** @license React v16.11.0
 * react.development.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';



if (process.env.NODE_ENV !== "production") {
  (function() {
'use strict';

var _assign = require('object-assign');
var checkPropTypes = require('prop-types/checkPropTypes');

// TODO: this is special because it gets imported during build.

var ReactVersion = '16.11.0';

// The Symbol used to tag the ReactElement-like types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.
var hasSymbol = typeof Symbol === 'function' && Symbol.for;
var REACT_ELEMENT_TYPE = hasSymbol ? Symbol.for('react.element') : 0xeac7;
var REACT_PORTAL_TYPE = hasSymbol ? Symbol.for('react.portal') : 0xeaca;
var REACT_FRAGMENT_TYPE = hasSymbol ? Symbol.for('react.fragment') : 0xeacb;
var REACT_STRICT_MODE_TYPE = hasSymbol ? Symbol.for('react.strict_mode') : 0xeacc;
var REACT_PROFILER_TYPE = hasSymbol ? Symbol.for('react.profiler') : 0xead2;
var REACT_PROVIDER_TYPE = hasSymbol ? Symbol.for('react.provider') : 0xeacd;
var REACT_CONTEXT_TYPE = hasSymbol ? Symbol.for('react.context') : 0xeace; // TODO: We don't use AsyncMode or ConcurrentMode anymore. They were temporary
// (unstable) APIs that have been removed. Can we remove the symbols?


var REACT_CONCURRENT_MODE_TYPE = hasSymbol ? Symbol.for('react.concurrent_mode') : 0xeacf;
var REACT_FORWARD_REF_TYPE = hasSymbol ? Symbol.for('react.forward_ref') : 0xead0;
var REACT_SUSPENSE_TYPE = hasSymbol ? Symbol.for('react.suspense') : 0xead1;
var REACT_SUSPENSE_LIST_TYPE = hasSymbol ? Symbol.for('react.suspense_list') : 0xead8;
var REACT_MEMO_TYPE = hasSymbol ? Symbol.for('react.memo') : 0xead3;
var REACT_LAZY_TYPE = hasSymbol ? Symbol.for('react.lazy') : 0xead4;
var REACT_FUNDAMENTAL_TYPE = hasSymbol ? Symbol.for('react.fundamental') : 0xead5;
var REACT_RESPONDER_TYPE = hasSymbol ? Symbol.for('react.responder') : 0xead6;
var REACT_SCOPE_TYPE = hasSymbol ? Symbol.for('react.scope') : 0xead7;
var MAYBE_ITERATOR_SYMBOL = typeof Symbol === 'function' && Symbol.iterator;
var FAUX_ITERATOR_SYMBOL = '@@iterator';
function getIteratorFn(maybeIterable) {
  if (maybeIterable === null || typeof maybeIterable !== 'object') {
    return null;
  }

  var maybeIterator = MAYBE_ITERATOR_SYMBOL && maybeIterable[MAYBE_ITERATOR_SYMBOL] || maybeIterable[FAUX_ITERATOR_SYMBOL];

  if (typeof maybeIterator === 'function') {
    return maybeIterator;
  }

  return null;
}

// Do not require this module directly! Use normal `invariant` calls with
// template literal strings. The messages will be replaced with error codes
// during build.

/**
 * Use invariant() to assert state which your program assumes to be true.
 *
 * Provide sprintf-style format (only %s is supported) and arguments
 * to provide information about what broke and what you were
 * expecting.
 *
 * The invariant message will be stripped in production, but the invariant
 * will remain to ensure logic does not differ in production.
 */

/**
 * Forked from fbjs/warning:
 * https://github.com/facebook/fbjs/blob/e66ba20ad5be433eb54423f2b097d829324d9de6/packages/fbjs/src/__forks__/warning.js
 *
 * Only change is we use console.warn instead of console.error,
 * and do nothing when 'console' is not supported.
 * This really simplifies the code.
 * ---
 * Similar to invariant but only logs a warning if the condition is not met.
 * This can be used to log issues in development environments in critical
 * paths. Removing the logging code for production environments will keep the
 * same logic and follow the same code paths.
 */
var lowPriorityWarningWithoutStack = function () {};

{
  var printWarning = function (format) {
    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      args[_key - 1] = arguments[_key];
    }

    var argIndex = 0;
    var message = 'Warning: ' + format.replace(/%s/g, function () {
      return args[argIndex++];
    });

    if (typeof console !== 'undefined') {
      console.warn(message);
    }

    try {
      // --- Welcome to debugging React ---
      // This error was thrown as a convenience so that you can use this stack
      // to find the callsite that caused this warning to fire.
      throw new Error(message);
    } catch (x) {}
  };

  lowPriorityWarningWithoutStack = function (condition, format) {
    if (format === undefined) {
      throw new Error('`lowPriorityWarningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument');
    }

    if (!condition) {
      for (var _len2 = arguments.length, args = new Array(_len2 > 2 ? _len2 - 2 : 0), _key2 = 2; _key2 < _len2; _key2++) {
        args[_key2 - 2] = arguments[_key2];
      }

      printWarning.apply(void 0, [format].concat(args));
    }
  };
}

var lowPriorityWarningWithoutStack$1 = lowPriorityWarningWithoutStack;

/**
 * Similar to invariant but only logs a warning if the condition is not met.
 * This can be used to log issues in development environments in critical
 * paths. Removing the logging code for production environments will keep the
 * same logic and follow the same code paths.
 */
var warningWithoutStack = function () {};

{
  warningWithoutStack = function (condition, format) {
    for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
      args[_key - 2] = arguments[_key];
    }

    if (format === undefined) {
      throw new Error('`warningWithoutStack(condition, format, ...args)` requires a warning ' + 'message argument');
    }

    if (args.length > 8) {
      // Check before the condition to catch violations early.
      throw new Error('warningWithoutStack() currently supports at most 8 arguments.');
    }

    if (condition) {
      return;
    }

    if (typeof console !== 'undefined') {
      var argsWithFormat = args.map(function (item) {
        return '' + item;
      });
      argsWithFormat.unshift('Warning: ' + format); // We intentionally don't use spread (or .apply) directly because it
      // breaks IE9: https://github.com/facebook/react/issues/13610

      Function.prototype.apply.call(console.error, console, argsWithFormat);
    }

    try {
      // --- Welcome to debugging React ---
      // This error was thrown as a convenience so that you can use this stack
      // to find the callsite that caused this warning to fire.
      var argIndex = 0;
      var message = 'Warning: ' + format.replace(/%s/g, function () {
        return args[argIndex++];
      });
      throw new Error(message);
    } catch (x) {}
  };
}

var warningWithoutStack$1 = warningWithoutStack;

var didWarnStateUpdateForUnmountedComponent = {};

function warnNoop(publicInstance, callerName) {
  {
    var _constructor = publicInstance.constructor;
    var componentName = _constructor && (_constructor.displayName || _constructor.name) || 'ReactClass';
    var warningKey = componentName + "." + callerName;

    if (didWarnStateUpdateForUnmountedComponent[warningKey]) {
      return;
    }

    warningWithoutStack$1(false, "Can't call %s on a component that is not yet mounted. " + 'This is a no-op, but it might indicate a bug in your application. ' + 'Instead, assign to `this.state` directly or define a `state = {};` ' + 'class property with the desired state in the %s component.', callerName, componentName);
    didWarnStateUpdateForUnmountedComponent[warningKey] = true;
  }
}
/**
 * This is the abstract API for an update queue.
 */


var ReactNoopUpdateQueue = {
  /**
   * Checks whether or not this composite component is mounted.
   * @param {ReactClass} publicInstance The instance we want to test.
   * @return {boolean} True if mounted, false otherwise.
   * @protected
   * @final
   */
  isMounted: function (publicInstance) {
    return false;
  },

  /**
   * Forces an update. This should only be invoked when it is known with
   * certainty that we are **not** in a DOM transaction.
   *
   * You may want to call this when you know that some deeper aspect of the
   * component's state has changed but `setState` was not called.
   *
   * This will not invoke `shouldComponentUpdate`, but it will invoke
   * `componentWillUpdate` and `componentDidUpdate`.
   *
   * @param {ReactClass} publicInstance The instance that should rerender.
   * @param {?function} callback Called after component is updated.
   * @param {?string} callerName name of the calling function in the public API.
   * @internal
   */
  enqueueForceUpdate: function (publicInstance, callback, callerName) {
    warnNoop(publicInstance, 'forceUpdate');
  },

  /**
   * Replaces all of the state. Always use this or `setState` to mutate state.
   * You should treat `this.state` as immutable.
   *
   * There is no guarantee that `this.state` will be immediately updated, so
   * accessing `this.state` after calling this method may return the old value.
   *
   * @param {ReactClass} publicInstance The instance that should rerender.
   * @param {object} completeState Next state.
   * @param {?function} callback Called after component is updated.
   * @param {?string} callerName name of the calling function in the public API.
   * @internal
   */
  enqueueReplaceState: function (publicInstance, completeState, callback, callerName) {
    warnNoop(publicInstance, 'replaceState');
  },

  /**
   * Sets a subset of the state. This only exists because _pendingState is
   * internal. This provides a merging strategy that is not available to deep
   * properties which is confusing. TODO: Expose pendingState or don't use it
   * during the merge.
   *
   * @param {ReactClass} publicInstance The instance that should rerender.
   * @param {object} partialState Next partial state to be merged with state.
   * @param {?function} callback Called after component is updated.
   * @param {?string} Name of the calling function in the public API.
   * @internal
   */
  enqueueSetState: function (publicInstance, partialState, callback, callerName) {
    warnNoop(publicInstance, 'setState');
  }
};

var emptyObject = {};

{
  Object.freeze(emptyObject);
}
/**
 * Base class helpers for the updating state of a component.
 */


function Component(props, context, updater) {
  this.props = props;
  this.context = context; // If a component has string refs, we will assign a different object later.

  this.refs = emptyObject; // We initialize the default updater but the real one gets injected by the
  // renderer.

  this.updater = updater || ReactNoopUpdateQueue;
}

Component.prototype.isReactComponent = {};
/**
 * Sets a subset of the state. Always use this to mutate
 * state. You should treat `this.state` as immutable.
 *
 * There is no guarantee that `this.state` will be immediately updated, so
 * accessing `this.state` after calling this method may return the old value.
 *
 * There is no guarantee that calls to `setState` will run synchronously,
 * as they may eventually be batched together.  You can provide an optional
 * callback that will be executed when the call to setState is actually
 * completed.
 *
 * When a function is provided to setState, it will be called at some point in
 * the future (not synchronously). It will be called with the up to date
 * component arguments (state, props, context). These values can be different
 * from this.* because your function may be called after receiveProps but before
 * shouldComponentUpdate, and this new state, props, and context will not yet be
 * assigned to this.
 *
 * @param {object|function} partialState Next partial state or function to
 *        produce next partial state to be merged with current state.
 * @param {?function} callback Called after state is updated.
 * @final
 * @protected
 */

Component.prototype.setState = function (partialState, callback) {
  if (!(typeof partialState === 'object' || typeof partialState === 'function' || partialState == null)) {
    {
      throw Error("setState(...): takes an object of state variables to update or a function which returns an object of state variables.");
    }
  }

  this.updater.enqueueSetState(this, partialState, callback, 'setState');
};
/**
 * Forces an update. This should only be invoked when it is known with
 * certainty that we are **not** in a DOM transaction.
 *
 * You may want to call this when you know that some deeper aspect of the
 * component's state has changed but `setState` was not called.
 *
 * This will not invoke `shouldComponentUpdate`, but it will invoke
 * `componentWillUpdate` and `componentDidUpdate`.
 *
 * @param {?function} callback Called after update is complete.
 * @final
 * @protected
 */


Component.prototype.forceUpdate = function (callback) {
  this.updater.enqueueForceUpdate(this, callback, 'forceUpdate');
};
/**
 * Deprecated APIs. These APIs used to exist on classic React classes but since
 * we would like to deprecate them, we're not going to move them over to this
 * modern base class. Instead, we define a getter that warns if it's accessed.
 */


{
  var deprecatedAPIs = {
    isMounted: ['isMounted', 'Instead, make sure to clean up subscriptions and pending requests in ' + 'componentWillUnmount to prevent memory leaks.'],
    replaceState: ['replaceState', 'Refactor your code to use setState instead (see ' + 'https://github.com/facebook/react/issues/3236).']
  };

  var defineDeprecationWarning = function (methodName, info) {
    Object.defineProperty(Component.prototype, methodName, {
      get: function () {
        lowPriorityWarningWithoutStack$1(false, '%s(...) is deprecated in plain JavaScript React classes. %s', info[0], info[1]);
        return undefined;
      }
    });
  };

  for (var fnName in deprecatedAPIs) {
    if (deprecatedAPIs.hasOwnProperty(fnName)) {
      defineDeprecationWarning(fnName, deprecatedAPIs[fnName]);
    }
  }
}

function ComponentDummy() {}

ComponentDummy.prototype = Component.prototype;
/**
 * Convenience component with default shallow equality check for sCU.
 */

function PureComponent(props, context, updater) {
  this.props = props;
  this.context = context; // If a component has string refs, we will assign a different object later.

  this.refs = emptyObject;
  this.updater = updater || ReactNoopUpdateQueue;
}

var pureComponentPrototype = PureComponent.prototype = new ComponentDummy();
pureComponentPrototype.constructor = PureComponent; // Avoid an extra prototype jump for these methods.

_assign(pureComponentPrototype, Component.prototype);

pureComponentPrototype.isPureReactComponent = true;

// an immutable object with a single mutable value
function createRef() {
  var refObject = {
    current: null
  };

  {
    Object.seal(refObject);
  }

  return refObject;
}

/**
 * Keeps track of the current dispatcher.
 */
var ReactCurrentDispatcher = {
  /**
   * @internal
   * @type {ReactComponent}
   */
  current: null
};

/**
 * Keeps track of the current batch's configuration such as how long an update
 * should suspend for if it needs to.
 */
var ReactCurrentBatchConfig = {
  suspense: null
};

/**
 * Keeps track of the current owner.
 *
 * The current owner is the component who should own any components that are
 * currently being constructed.
 */
var ReactCurrentOwner = {
  /**
   * @internal
   * @type {ReactComponent}
   */
  current: null
};

var BEFORE_SLASH_RE = /^(.*)[\\\/]/;
var describeComponentFrame = function (name, source, ownerName) {
  var sourceInfo = '';

  if (source) {
    var path = source.fileName;
    var fileName = path.replace(BEFORE_SLASH_RE, '');

    {
      // In DEV, include code for a common special case:
      // prefer "folder/index.js" instead of just "index.js".
      if (/^index\./.test(fileName)) {
        var match = path.match(BEFORE_SLASH_RE);

        if (match) {
          var pathBeforeSlash = match[1];

          if (pathBeforeSlash) {
            var folderName = pathBeforeSlash.replace(BEFORE_SLASH_RE, '');
            fileName = folderName + '/' + fileName;
          }
        }
      }
    }

    sourceInfo = ' (at ' + fileName + ':' + source.lineNumber + ')';
  } else if (ownerName) {
    sourceInfo = ' (created by ' + ownerName + ')';
  }

  return '\n    in ' + (name || 'Unknown') + sourceInfo;
};

var Resolved = 1;

function refineResolvedLazyComponent(lazyComponent) {
  return lazyComponent._status === Resolved ? lazyComponent._result : null;
}

function getWrappedName(outerType, innerType, wrapperName) {
  var functionName = innerType.displayName || innerType.name || '';
  return outerType.displayName || (functionName !== '' ? wrapperName + "(" + functionName + ")" : wrapperName);
}

function getComponentName(type) {
  if (type == null) {
    // Host root, text node or just invalid type.
    return null;
  }

  {
    if (typeof type.tag === 'number') {
      warningWithoutStack$1(false, 'Received an unexpected object in getComponentName(). ' + 'This is likely a bug in React. Please file an issue.');
    }
  }

  if (typeof type === 'function') {
    return type.displayName || type.name || null;
  }

  if (typeof type === 'string') {
    return type;
  }

  switch (type) {
    case REACT_FRAGMENT_TYPE:
      return 'Fragment';

    case REACT_PORTAL_TYPE:
      return 'Portal';

    case REACT_PROFILER_TYPE:
      return "Profiler";

    case REACT_STRICT_MODE_TYPE:
      return 'StrictMode';

    case REACT_SUSPENSE_TYPE:
      return 'Suspense';

    case REACT_SUSPENSE_LIST_TYPE:
      return 'SuspenseList';
  }

  if (typeof type === 'object') {
    switch (type.$$typeof) {
      case REACT_CONTEXT_TYPE:
        return 'Context.Consumer';

      case REACT_PROVIDER_TYPE:
        return 'Context.Provider';

      case REACT_FORWARD_REF_TYPE:
        return getWrappedName(type, type.render, 'ForwardRef');

      case REACT_MEMO_TYPE:
        return getComponentName(type.type);

      case REACT_LAZY_TYPE:
        {
          var thenable = type;
          var resolvedThenable = refineResolvedLazyComponent(thenable);

          if (resolvedThenable) {
            return getComponentName(resolvedThenable);
          }

          break;
        }
    }
  }

  return null;
}

var ReactDebugCurrentFrame = {};
var currentlyValidatingElement = null;
function setCurrentlyValidatingElement(element) {
  {
    currentlyValidatingElement = element;
  }
}

{
  // Stack implementation injected by the current renderer.
  ReactDebugCurrentFrame.getCurrentStack = null;

  ReactDebugCurrentFrame.getStackAddendum = function () {
    var stack = ''; // Add an extra top frame while an element is being validated

    if (currentlyValidatingElement) {
      var name = getComponentName(currentlyValidatingElement.type);
      var owner = currentlyValidatingElement._owner;
      stack += describeComponentFrame(name, currentlyValidatingElement._source, owner && getComponentName(owner.type));
    } // Delegate to the injected renderer-specific implementation


    var impl = ReactDebugCurrentFrame.getCurrentStack;

    if (impl) {
      stack += impl() || '';
    }

    return stack;
  };
}

/**
 * Used by act() to track whether you're inside an act() scope.
 */
var IsSomeRendererActing = {
  current: false
};

var ReactSharedInternals = {
  ReactCurrentDispatcher: ReactCurrentDispatcher,
  ReactCurrentBatchConfig: ReactCurrentBatchConfig,
  ReactCurrentOwner: ReactCurrentOwner,
  IsSomeRendererActing: IsSomeRendererActing,
  // Used by renderers to avoid bundling object-assign twice in UMD bundles:
  assign: _assign
};

{
  _assign(ReactSharedInternals, {
    // These should not be included in production.
    ReactDebugCurrentFrame: ReactDebugCurrentFrame,
    // Shim for React DOM 16.0.0 which still destructured (but not used) this.
    // TODO: remove in React 17.0.
    ReactComponentTreeHook: {}
  });
}

/**
 * Similar to invariant but only logs a warning if the condition is not met.
 * This can be used to log issues in development environments in critical
 * paths. Removing the logging code for production environments will keep the
 * same logic and follow the same code paths.
 */

var warning = warningWithoutStack$1;

{
  warning = function (condition, format) {
    if (condition) {
      return;
    }

    var ReactDebugCurrentFrame = ReactSharedInternals.ReactDebugCurrentFrame;
    var stack = ReactDebugCurrentFrame.getStackAddendum(); // eslint-disable-next-line react-internal/warning-and-invariant-args

    for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
      args[_key - 2] = arguments[_key];
    }

    warningWithoutStack$1.apply(void 0, [false, format + '%s'].concat(args, [stack]));
  };
}

var warning$1 = warning;

var hasOwnProperty = Object.prototype.hasOwnProperty;
var RESERVED_PROPS = {
  key: true,
  ref: true,
  __self: true,
  __source: true
};
var specialPropKeyWarningShown;
var specialPropRefWarningShown;

function hasValidRef(config) {
  {
    if (hasOwnProperty.call(config, 'ref')) {
      var getter = Object.getOwnPropertyDescriptor(config, 'ref').get;

      if (getter && getter.isReactWarning) {
        return false;
      }
    }
  }

  return config.ref !== undefined;
}

function hasValidKey(config) {
  {
    if (hasOwnProperty.call(config, 'key')) {
      var getter = Object.getOwnPropertyDescriptor(config, 'key').get;

      if (getter && getter.isReactWarning) {
        return false;
      }
    }
  }

  return config.key !== undefined;
}

function defineKeyPropWarningGetter(props, displayName) {
  var warnAboutAccessingKey = function () {
    if (!specialPropKeyWarningShown) {
      specialPropKeyWarningShown = true;
      warningWithoutStack$1(false, '%s: `key` is not a prop. Trying to access it will result ' + 'in `undefined` being returned. If you need to access the same ' + 'value within the child component, you should pass it as a different ' + 'prop. (https://fb.me/react-special-props)', displayName);
    }
  };

  warnAboutAccessingKey.isReactWarning = true;
  Object.defineProperty(props, 'key', {
    get: warnAboutAccessingKey,
    configurable: true
  });
}

function defineRefPropWarningGetter(props, displayName) {
  var warnAboutAccessingRef = function () {
    if (!specialPropRefWarningShown) {
      specialPropRefWarningShown = true;
      warningWithoutStack$1(false, '%s: `ref` is not a prop. Trying to access it will result ' + 'in `undefined` being returned. If you need to access the same ' + 'value within the child component, you should pass it as a different ' + 'prop. (https://fb.me/react-special-props)', displayName);
    }
  };

  warnAboutAccessingRef.isReactWarning = true;
  Object.defineProperty(props, 'ref', {
    get: warnAboutAccessingRef,
    configurable: true
  });
}
/**
 * Factory method to create a new React element. This no longer adheres to
 * the class pattern, so do not use new to call it. Also, instanceof check
 * will not work. Instead test $$typeof field against Symbol.for('react.element') to check
 * if something is a React Element.
 *
 * @param {*} type
 * @param {*} props
 * @param {*} key
 * @param {string|object} ref
 * @param {*} owner
 * @param {*} self A *temporary* helper to detect places where `this` is
 * different from the `owner` when React.createElement is called, so that we
 * can warn. We want to get rid of owner and replace string `ref`s with arrow
 * functions, and as long as `this` and owner are the same, there will be no
 * change in behavior.
 * @param {*} source An annotation object (added by a transpiler or otherwise)
 * indicating filename, line number, and/or other information.
 * @internal
 */


var ReactElement = function (type, key, ref, self, source, owner, props) {
  var element = {
    // This tag allows us to uniquely identify this as a React Element
    $$typeof: REACT_ELEMENT_TYPE,
    // Built-in properties that belong on the element
    type: type,
    key: key,
    ref: ref,
    props: props,
    // Record the component responsible for creating this element.
    _owner: owner
  };

  {
    // The validation flag is currently mutative. We put it on
    // an external backing store so that we can freeze the whole object.
    // This can be replaced with a WeakMap once they are implemented in
    // commonly used development environments.
    element._store = {}; // To make comparing ReactElements easier for testing purposes, we make
    // the validation flag non-enumerable (where possible, which should
    // include every environment we run tests in), so the test framework
    // ignores it.

    Object.defineProperty(element._store, 'validated', {
      configurable: false,
      enumerable: false,
      writable: true,
      value: false
    }); // self and source are DEV only properties.

    Object.defineProperty(element, '_self', {
      configurable: false,
      enumerable: false,
      writable: false,
      value: self
    }); // Two elements created in two different places should be considered
    // equal for testing purposes and therefore we hide it from enumeration.

    Object.defineProperty(element, '_source', {
      configurable: false,
      enumerable: false,
      writable: false,
      value: source
    });

    if (Object.freeze) {
      Object.freeze(element.props);
      Object.freeze(element);
    }
  }

  return element;
};
/**
 * https://github.com/reactjs/rfcs/pull/107
 * @param {*} type
 * @param {object} props
 * @param {string} key
 */



/**
 * https://github.com/reactjs/rfcs/pull/107
 * @param {*} type
 * @param {object} props
 * @param {string} key
 */

function jsxDEV(type, config, maybeKey, source, self) {
  var propName; // Reserved names are extracted

  var props = {};
  var key = null;
  var ref = null; // Currently, key can be spread in as a prop. This causes a potential
  // issue if key is also explicitly declared (ie. <div {...props} key="Hi" />
  // or <div key="Hi" {...props} /> ). We want to deprecate key spread,
  // but as an intermediary step, we will use jsxDEV for everything except
  // <div {...props} key="Hi" />, because we aren't currently able to tell if
  // key is explicitly declared to be undefined or not.

  if (maybeKey !== undefined) {
    key = '' + maybeKey;
  }

  if (hasValidKey(config)) {
    key = '' + config.key;
  }

  if (hasValidRef(config)) {
    ref = config.ref;
  } // Remaining properties are added to a new props object


  for (propName in config) {
    if (hasOwnProperty.call(config, propName) && !RESERVED_PROPS.hasOwnProperty(propName)) {
      props[propName] = config[propName];
    }
  } // Resolve default props


  if (type && type.defaultProps) {
    var defaultProps = type.defaultProps;

    for (propName in defaultProps) {
      if (props[propName] === undefined) {
        props[propName] = defaultProps[propName];
      }
    }
  }

  if (key || ref) {
    var displayName = typeof type === 'function' ? type.displayName || type.name || 'Unknown' : type;

    if (key) {
      defineKeyPropWarningGetter(props, displayName);
    }

    if (ref) {
      defineRefPropWarningGetter(props, displayName);
    }
  }

  return ReactElement(type, key, ref, self, source, ReactCurrentOwner.current, props);
}
/**
 * Create and return a new ReactElement of the given type.
 * See https://reactjs.org/docs/react-api.html#createelement
 */

function createElement(type, config, children) {
  var propName; // Reserved names are extracted

  var props = {};
  var key = null;
  var ref = null;
  var self = null;
  var source = null;

  if (config != null) {
    if (hasValidRef(config)) {
      ref = config.ref;
    }

    if (hasValidKey(config)) {
      key = '' + config.key;
    }

    self = config.__self === undefined ? null : config.__self;
    source = config.__source === undefined ? null : config.__source; // Remaining properties are added to a new props object

    for (propName in config) {
      if (hasOwnProperty.call(config, propName) && !RESERVED_PROPS.hasOwnProperty(propName)) {
        props[propName] = config[propName];
      }
    }
  } // Children can be more than one argument, and those are transferred onto
  // the newly allocated props object.


  var childrenLength = arguments.length - 2;

  if (childrenLength === 1) {
    props.children = children;
  } else if (childrenLength > 1) {
    var childArray = Array(childrenLength);

    for (var i = 0; i < childrenLength; i++) {
      childArray[i] = arguments[i + 2];
    }

    {
      if (Object.freeze) {
        Object.freeze(childArray);
      }
    }

    props.children = childArray;
  } // Resolve default props


  if (type && type.defaultProps) {
    var defaultProps = type.defaultProps;

    for (propName in defaultProps) {
      if (props[propName] === undefined) {
        props[propName] = defaultProps[propName];
      }
    }
  }

  {
    if (key || ref) {
      var displayName = typeof type === 'function' ? type.displayName || type.name || 'Unknown' : type;

      if (key) {
        defineKeyPropWarningGetter(props, displayName);
      }

      if (ref) {
        defineRefPropWarningGetter(props, displayName);
      }
    }
  }

  return ReactElement(type, key, ref, self, source, ReactCurrentOwner.current, props);
}
/**
 * Return a function that produces ReactElements of a given type.
 * See https://reactjs.org/docs/react-api.html#createfactory
 */


function cloneAndReplaceKey(oldElement, newKey) {
  var newElement = ReactElement(oldElement.type, newKey, oldElement.ref, oldElement._self, oldElement._source, oldElement._owner, oldElement.props);
  return newElement;
}
/**
 * Clone and return a new ReactElement using element as the starting point.
 * See https://reactjs.org/docs/react-api.html#cloneelement
 */

function cloneElement(element, config, children) {
  if (!!(element === null || element === undefined)) {
    {
      throw Error("React.cloneElement(...): The argument must be a React element, but you passed " + element + ".");
    }
  }

  var propName; // Original props are copied

  var props = _assign({}, element.props); // Reserved names are extracted


  var key = element.key;
  var ref = element.ref; // Self is preserved since the owner is preserved.

  var self = element._self; // Source is preserved since cloneElement is unlikely to be targeted by a
  // transpiler, and the original source is probably a better indicator of the
  // true owner.

  var source = element._source; // Owner will be preserved, unless ref is overridden

  var owner = element._owner;

  if (config != null) {
    if (hasValidRef(config)) {
      // Silently steal the ref from the parent.
      ref = config.ref;
      owner = ReactCurrentOwner.current;
    }

    if (hasValidKey(config)) {
      key = '' + config.key;
    } // Remaining properties override existing props


    var defaultProps;

    if (element.type && element.type.defaultProps) {
      defaultProps = element.type.defaultProps;
    }

    for (propName in config) {
      if (hasOwnProperty.call(config, propName) && !RESERVED_PROPS.hasOwnProperty(propName)) {
        if (config[propName] === undefined && defaultProps !== undefined) {
          // Resolve default props
          props[propName] = defaultProps[propName];
        } else {
          props[propName] = config[propName];
        }
      }
    }
  } // Children can be more than one argument, and those are transferred onto
  // the newly allocated props object.


  var childrenLength = arguments.length - 2;

  if (childrenLength === 1) {
    props.children = children;
  } else if (childrenLength > 1) {
    var childArray = Array(childrenLength);

    for (var i = 0; i < childrenLength; i++) {
      childArray[i] = arguments[i + 2];
    }

    props.children = childArray;
  }

  return ReactElement(element.type, key, ref, self, source, owner, props);
}
/**
 * Verifies the object is a ReactElement.
 * See https://reactjs.org/docs/react-api.html#isvalidelement
 * @param {?object} object
 * @return {boolean} True if `object` is a ReactElement.
 * @final
 */

function isValidElement(object) {
  return typeof object === 'object' && object !== null && object.$$typeof === REACT_ELEMENT_TYPE;
}

var SEPARATOR = '.';
var SUBSEPARATOR = ':';
/**
 * Escape and wrap key so it is safe to use as a reactid
 *
 * @param {string} key to be escaped.
 * @return {string} the escaped key.
 */

function escape(key) {
  var escapeRegex = /[=:]/g;
  var escaperLookup = {
    '=': '=0',
    ':': '=2'
  };
  var escapedString = ('' + key).replace(escapeRegex, function (match) {
    return escaperLookup[match];
  });
  return '$' + escapedString;
}
/**
 * TODO: Test that a single child and an array with one item have the same key
 * pattern.
 */


var didWarnAboutMaps = false;
var userProvidedKeyEscapeRegex = /\/+/g;

function escapeUserProvidedKey(text) {
  return ('' + text).replace(userProvidedKeyEscapeRegex, '$&/');
}

var POOL_SIZE = 10;
var traverseContextPool = [];

function getPooledTraverseContext(mapResult, keyPrefix, mapFunction, mapContext) {
  if (traverseContextPool.length) {
    var traverseContext = traverseContextPool.pop();
    traverseContext.result = mapResult;
    traverseContext.keyPrefix = keyPrefix;
    traverseContext.func = mapFunction;
    traverseContext.context = mapContext;
    traverseContext.count = 0;
    return traverseContext;
  } else {
    return {
      result: mapResult,
      keyPrefix: keyPrefix,
      func: mapFunction,
      context: mapContext,
      count: 0
    };
  }
}

function releaseTraverseContext(traverseContext) {
  traverseContext.result = null;
  traverseContext.keyPrefix = null;
  traverseContext.func = null;
  traverseContext.context = null;
  traverseContext.count = 0;

  if (traverseContextPool.length < POOL_SIZE) {
    traverseContextPool.push(traverseContext);
  }
}
/**
 * @param {?*} children Children tree container.
 * @param {!string} nameSoFar Name of the key path so far.
 * @param {!function} callback Callback to invoke with each child found.
 * @param {?*} traverseContext Used to pass information throughout the traversal
 * process.
 * @return {!number} The number of children in this subtree.
 */


function traverseAllChildrenImpl(children, nameSoFar, callback, traverseContext) {
  var type = typeof children;

  if (type === 'undefined' || type === 'boolean') {
    // All of the above are perceived as null.
    children = null;
  }

  var invokeCallback = false;

  if (children === null) {
    invokeCallback = true;
  } else {
    switch (type) {
      case 'string':
      case 'number':
        invokeCallback = true;
        break;

      case 'object':
        switch (children.$$typeof) {
          case REACT_ELEMENT_TYPE:
          case REACT_PORTAL_TYPE:
            invokeCallback = true;
        }

    }
  }

  if (invokeCallback) {
    callback(traverseContext, children, // If it's the only child, treat the name as if it was wrapped in an array
    // so that it's consistent if the number of children grows.
    nameSoFar === '' ? SEPARATOR + getComponentKey(children, 0) : nameSoFar);
    return 1;
  }

  var child;
  var nextName;
  var subtreeCount = 0; // Count of children found in the current subtree.

  var nextNamePrefix = nameSoFar === '' ? SEPARATOR : nameSoFar + SUBSEPARATOR;

  if (Array.isArray(children)) {
    for (var i = 0; i < children.length; i++) {
      child = children[i];
      nextName = nextNamePrefix + getComponentKey(child, i);
      subtreeCount += traverseAllChildrenImpl(child, nextName, callback, traverseContext);
    }
  } else {
    var iteratorFn = getIteratorFn(children);

    if (typeof iteratorFn === 'function') {
      {
        // Warn about using Maps as children
        if (iteratorFn === children.entries) {
          !didWarnAboutMaps ? warning$1(false, 'Using Maps as children is unsupported and will likely yield ' + 'unexpected results. Convert it to a sequence/iterable of keyed ' + 'ReactElements instead.') : void 0;
          didWarnAboutMaps = true;
        }
      }

      var iterator = iteratorFn.call(children);
      var step;
      var ii = 0;

      while (!(step = iterator.next()).done) {
        child = step.value;
        nextName = nextNamePrefix + getComponentKey(child, ii++);
        subtreeCount += traverseAllChildrenImpl(child, nextName, callback, traverseContext);
      }
    } else if (type === 'object') {
      var addendum = '';

      {
        addendum = ' If you meant to render a collection of children, use an array ' + 'instead.' + ReactDebugCurrentFrame.getStackAddendum();
      }

      var childrenString = '' + children;

      {
        {
          throw Error("Objects are not valid as a React child (found: " + (childrenString === '[object Object]' ? 'object with keys {' + Object.keys(children).join(', ') + '}' : childrenString) + ")." + addendum);
        }
      }
    }
  }

  return subtreeCount;
}
/**
 * Traverses children that are typically specified as `props.children`, but
 * might also be specified through attributes:
 *
 * - `traverseAllChildren(this.props.children, ...)`
 * - `traverseAllChildren(this.props.leftPanelChildren, ...)`
 *
 * The `traverseContext` is an optional argument that is passed through the
 * entire traversal. It can be used to store accumulations or anything else that
 * the callback might find relevant.
 *
 * @param {?*} children Children tree object.
 * @param {!function} callback To invoke upon traversing each child.
 * @param {?*} traverseContext Context for traversal.
 * @return {!number} The number of children in this subtree.
 */


function traverseAllChildren(children, callback, traverseContext) {
  if (children == null) {
    return 0;
  }

  return traverseAllChildrenImpl(children, '', callback, traverseContext);
}
/**
 * Generate a key string that identifies a component within a set.
 *
 * @param {*} component A component that could contain a manual key.
 * @param {number} index Index that is used if a manual key is not provided.
 * @return {string}
 */


function getComponentKey(component, index) {
  // Do some typechecking here since we call this blindly. We want to ensure
  // that we don't block potential future ES APIs.
  if (typeof component === 'object' && component !== null && component.key != null) {
    // Explicit key
    return escape(component.key);
  } // Implicit key determined by the index in the set


  return index.toString(36);
}

function forEachSingleChild(bookKeeping, child, name) {
  var func = bookKeeping.func,
      context = bookKeeping.context;
  func.call(context, child, bookKeeping.count++);
}
/**
 * Iterates through children that are typically specified as `props.children`.
 *
 * See https://reactjs.org/docs/react-api.html#reactchildrenforeach
 *
 * The provided forEachFunc(child, index) will be called for each
 * leaf child.
 *
 * @param {?*} children Children tree container.
 * @param {function(*, int)} forEachFunc
 * @param {*} forEachContext Context for forEachContext.
 */


function forEachChildren(children, forEachFunc, forEachContext) {
  if (children == null) {
    return children;
  }

  var traverseContext = getPooledTraverseContext(null, null, forEachFunc, forEachContext);
  traverseAllChildren(children, forEachSingleChild, traverseContext);
  releaseTraverseContext(traverseContext);
}

function mapSingleChildIntoContext(bookKeeping, child, childKey) {
  var result = bookKeeping.result,
      keyPrefix = bookKeeping.keyPrefix,
      func = bookKeeping.func,
      context = bookKeeping.context;
  var mappedChild = func.call(context, child, bookKeeping.count++);

  if (Array.isArray(mappedChild)) {
    mapIntoWithKeyPrefixInternal(mappedChild, result, childKey, function (c) {
      return c;
    });
  } else if (mappedChild != null) {
    if (isValidElement(mappedChild)) {
      mappedChild = cloneAndReplaceKey(mappedChild, // Keep both the (mapped) and old keys if they differ, just as
      // traverseAllChildren used to do for objects as children
      keyPrefix + (mappedChild.key && (!child || child.key !== mappedChild.key) ? escapeUserProvidedKey(mappedChild.key) + '/' : '') + childKey);
    }

    result.push(mappedChild);
  }
}

function mapIntoWithKeyPrefixInternal(children, array, prefix, func, context) {
  var escapedPrefix = '';

  if (prefix != null) {
    escapedPrefix = escapeUserProvidedKey(prefix) + '/';
  }

  var traverseContext = getPooledTraverseContext(array, escapedPrefix, func, context);
  traverseAllChildren(children, mapSingleChildIntoContext, traverseContext);
  releaseTraverseContext(traverseContext);
}
/**
 * Maps children that are typically specified as `props.children`.
 *
 * See https://reactjs.org/docs/react-api.html#reactchildrenmap
 *
 * The provided mapFunction(child, key, index) will be called for each
 * leaf child.
 *
 * @param {?*} children Children tree container.
 * @param {function(*, int)} func The map function.
 * @param {*} context Context for mapFunction.
 * @return {object} Object containing the ordered map of results.
 */


function mapChildren(children, func, context) {
  if (children == null) {
    return children;
  }

  var result = [];
  mapIntoWithKeyPrefixInternal(children, result, null, func, context);
  return result;
}
/**
 * Count the number of children that are typically specified as
 * `props.children`.
 *
 * See https://reactjs.org/docs/react-api.html#reactchildrencount
 *
 * @param {?*} children Children tree container.
 * @return {number} The number of children.
 */


function countChildren(children) {
  return traverseAllChildren(children, function () {
    return null;
  }, null);
}
/**
 * Flatten a children object (typically specified as `props.children`) and
 * return an array with appropriately re-keyed children.
 *
 * See https://reactjs.org/docs/react-api.html#reactchildrentoarray
 */


function toArray(children) {
  var result = [];
  mapIntoWithKeyPrefixInternal(children, result, null, function (child) {
    return child;
  });
  return result;
}
/**
 * Returns the first child in a collection of children and verifies that there
 * is only one child in the collection.
 *
 * See https://reactjs.org/docs/react-api.html#reactchildrenonly
 *
 * The current implementation of this function assumes that a single child gets
 * passed without a wrapper, but the purpose of this helper function is to
 * abstract away the particular structure of children.
 *
 * @param {?object} children Child collection structure.
 * @return {ReactElement} The first and only `ReactElement` contained in the
 * structure.
 */


function onlyChild(children) {
  if (!isValidElement(children)) {
    {
      throw Error("React.Children.only expected to receive a single React element child.");
    }
  }

  return children;
}

function createContext(defaultValue, calculateChangedBits) {
  if (calculateChangedBits === undefined) {
    calculateChangedBits = null;
  } else {
    {
      !(calculateChangedBits === null || typeof calculateChangedBits === 'function') ? warningWithoutStack$1(false, 'createContext: Expected the optional second argument to be a ' + 'function. Instead received: %s', calculateChangedBits) : void 0;
    }
  }

  var context = {
    $$typeof: REACT_CONTEXT_TYPE,
    _calculateChangedBits: calculateChangedBits,
    // As a workaround to support multiple concurrent renderers, we categorize
    // some renderers as primary and others as secondary. We only expect
    // there to be two concurrent renderers at most: React Native (primary) and
    // Fabric (secondary); React DOM (primary) and React ART (secondary).
    // Secondary renderers store their context values on separate fields.
    _currentValue: defaultValue,
    _currentValue2: defaultValue,
    // Used to track how many concurrent renderers this context currently
    // supports within in a single renderer. Such as parallel server rendering.
    _threadCount: 0,
    // These are circular
    Provider: null,
    Consumer: null
  };
  context.Provider = {
    $$typeof: REACT_PROVIDER_TYPE,
    _context: context
  };
  var hasWarnedAboutUsingNestedContextConsumers = false;
  var hasWarnedAboutUsingConsumerProvider = false;

  {
    // A separate object, but proxies back to the original context object for
    // backwards compatibility. It has a different $$typeof, so we can properly
    // warn for the incorrect usage of Context as a Consumer.
    var Consumer = {
      $$typeof: REACT_CONTEXT_TYPE,
      _context: context,
      _calculateChangedBits: context._calculateChangedBits
    }; // $FlowFixMe: Flow complains about not setting a value, which is intentional here

    Object.defineProperties(Consumer, {
      Provider: {
        get: function () {
          if (!hasWarnedAboutUsingConsumerProvider) {
            hasWarnedAboutUsingConsumerProvider = true;
            warning$1(false, 'Rendering <Context.Consumer.Provider> is not supported and will be removed in ' + 'a future major release. Did you mean to render <Context.Provider> instead?');
          }

          return context.Provider;
        },
        set: function (_Provider) {
          context.Provider = _Provider;
        }
      },
      _currentValue: {
        get: function () {
          return context._currentValue;
        },
        set: function (_currentValue) {
          context._currentValue = _currentValue;
        }
      },
      _currentValue2: {
        get: function () {
          return context._currentValue2;
        },
        set: function (_currentValue2) {
          context._currentValue2 = _currentValue2;
        }
      },
      _threadCount: {
        get: function () {
          return context._threadCount;
        },
        set: function (_threadCount) {
          context._threadCount = _threadCount;
        }
      },
      Consumer: {
        get: function () {
          if (!hasWarnedAboutUsingNestedContextConsumers) {
            hasWarnedAboutUsingNestedContextConsumers = true;
            warning$1(false, 'Rendering <Context.Consumer.Consumer> is not supported and will be removed in ' + 'a future major release. Did you mean to render <Context.Consumer> instead?');
          }

          return context.Consumer;
        }
      }
    }); // $FlowFixMe: Flow complains about missing properties because it doesn't understand defineProperty

    context.Consumer = Consumer;
  }

  {
    context._currentRenderer = null;
    context._currentRenderer2 = null;
  }

  return context;
}

function lazy(ctor) {
  var lazyType = {
    $$typeof: REACT_LAZY_TYPE,
    _ctor: ctor,
    // React uses these fields to store the result.
    _status: -1,
    _result: null
  };

  {
    // In production, this would just set it on the object.
    var defaultProps;
    var propTypes;
    Object.defineProperties(lazyType, {
      defaultProps: {
        configurable: true,
        get: function () {
          return defaultProps;
        },
        set: function (newDefaultProps) {
          warning$1(false, 'React.lazy(...): It is not supported to assign `defaultProps` to ' + 'a lazy component import. Either specify them where the component ' + 'is defined, or create a wrapping component around it.');
          defaultProps = newDefaultProps; // Match production behavior more closely:

          Object.defineProperty(lazyType, 'defaultProps', {
            enumerable: true
          });
        }
      },
      propTypes: {
        configurable: true,
        get: function () {
          return propTypes;
        },
        set: function (newPropTypes) {
          warning$1(false, 'React.lazy(...): It is not supported to assign `propTypes` to ' + 'a lazy component import. Either specify them where the component ' + 'is defined, or create a wrapping component around it.');
          propTypes = newPropTypes; // Match production behavior more closely:

          Object.defineProperty(lazyType, 'propTypes', {
            enumerable: true
          });
        }
      }
    });
  }

  return lazyType;
}

function forwardRef(render) {
  {
    if (render != null && render.$$typeof === REACT_MEMO_TYPE) {
      warningWithoutStack$1(false, 'forwardRef requires a render function but received a `memo` ' + 'component. Instead of forwardRef(memo(...)), use ' + 'memo(forwardRef(...)).');
    } else if (typeof render !== 'function') {
      warningWithoutStack$1(false, 'forwardRef requires a render function but was given %s.', render === null ? 'null' : typeof render);
    } else {
      !( // Do not warn for 0 arguments because it could be due to usage of the 'arguments' object
      render.length === 0 || render.length === 2) ? warningWithoutStack$1(false, 'forwardRef render functions accept exactly two parameters: props and ref. %s', render.length === 1 ? 'Did you forget to use the ref parameter?' : 'Any additional parameter will be undefined.') : void 0;
    }

    if (render != null) {
      !(render.defaultProps == null && render.propTypes == null) ? warningWithoutStack$1(false, 'forwardRef render functions do not support propTypes or defaultProps. ' + 'Did you accidentally pass a React component?') : void 0;
    }
  }

  return {
    $$typeof: REACT_FORWARD_REF_TYPE,
    render: render
  };
}

function isValidElementType(type) {
  return typeof type === 'string' || typeof type === 'function' || // Note: its typeof might be other than 'symbol' or 'number' if it's a polyfill.
  type === REACT_FRAGMENT_TYPE || type === REACT_CONCURRENT_MODE_TYPE || type === REACT_PROFILER_TYPE || type === REACT_STRICT_MODE_TYPE || type === REACT_SUSPENSE_TYPE || type === REACT_SUSPENSE_LIST_TYPE || typeof type === 'object' && type !== null && (type.$$typeof === REACT_LAZY_TYPE || type.$$typeof === REACT_MEMO_TYPE || type.$$typeof === REACT_PROVIDER_TYPE || type.$$typeof === REACT_CONTEXT_TYPE || type.$$typeof === REACT_FORWARD_REF_TYPE || type.$$typeof === REACT_FUNDAMENTAL_TYPE || type.$$typeof === REACT_RESPONDER_TYPE || type.$$typeof === REACT_SCOPE_TYPE);
}

function memo(type, compare) {
  {
    if (!isValidElementType(type)) {
      warningWithoutStack$1(false, 'memo: The first argument must be a component. Instead ' + 'received: %s', type === null ? 'null' : typeof type);
    }
  }

  return {
    $$typeof: REACT_MEMO_TYPE,
    type: type,
    compare: compare === undefined ? null : compare
  };
}

function resolveDispatcher() {
  var dispatcher = ReactCurrentDispatcher.current;

  if (!(dispatcher !== null)) {
    {
      throw Error("Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:\n1. You might have mismatching versions of React and the renderer (such as React DOM)\n2. You might be breaking the Rules of Hooks\n3. You might have more than one copy of React in the same app\nSee https://fb.me/react-invalid-hook-call for tips about how to debug and fix this problem.");
    }
  }

  return dispatcher;
}

function useContext(Context, unstable_observedBits) {
  var dispatcher = resolveDispatcher();

  {
    !(unstable_observedBits === undefined) ? warning$1(false, 'useContext() second argument is reserved for future ' + 'use in React. Passing it is not supported. ' + 'You passed: %s.%s', unstable_observedBits, typeof unstable_observedBits === 'number' && Array.isArray(arguments[2]) ? '\n\nDid you call array.map(useContext)? ' + 'Calling Hooks inside a loop is not supported. ' + 'Learn more at https://fb.me/rules-of-hooks' : '') : void 0; // TODO: add a more generic warning for invalid values.

    if (Context._context !== undefined) {
      var realContext = Context._context; // Don't deduplicate because this legitimately causes bugs
      // and nobody should be using this in existing code.

      if (realContext.Consumer === Context) {
        warning$1(false, 'Calling useContext(Context.Consumer) is not supported, may cause bugs, and will be ' + 'removed in a future major release. Did you mean to call useContext(Context) instead?');
      } else if (realContext.Provider === Context) {
        warning$1(false, 'Calling useContext(Context.Provider) is not supported. ' + 'Did you mean to call useContext(Context) instead?');
      }
    }
  }

  return dispatcher.useContext(Context, unstable_observedBits);
}
function useState(initialState) {
  var dispatcher = resolveDispatcher();
  return dispatcher.useState(initialState);
}
function useReducer(reducer, initialArg, init) {
  var dispatcher = resolveDispatcher();
  return dispatcher.useReducer(reducer, initialArg, init);
}
function useRef(initialValue) {
  var dispatcher = resolveDispatcher();
  return dispatcher.useRef(initialValue);
}
function useEffect(create, inputs) {
  var dispatcher = resolveDispatcher();
  return dispatcher.useEffect(create, inputs);
}
function useLayoutEffect(create, inputs) {
  var dispatcher = resolveDispatcher();
  return dispatcher.useLayoutEffect(create, inputs);
}
function useCallback(callback, inputs) {
  var dispatcher = resolveDispatcher();
  return dispatcher.useCallback(callback, inputs);
}
function useMemo(create, inputs) {
  var dispatcher = resolveDispatcher();
  return dispatcher.useMemo(create, inputs);
}
function useImperativeHandle(ref, create, inputs) {
  var dispatcher = resolveDispatcher();
  return dispatcher.useImperativeHandle(ref, create, inputs);
}
function useDebugValue(value, formatterFn) {
  {
    var dispatcher = resolveDispatcher();
    return dispatcher.useDebugValue(value, formatterFn);
  }
}
var emptyObject$1 = {};
function useResponder(responder, listenerProps) {
  var dispatcher = resolveDispatcher();

  {
    if (responder == null || responder.$$typeof !== REACT_RESPONDER_TYPE) {
      warning$1(false, 'useResponder: invalid first argument. Expected an event responder, but instead got %s', responder);
      return;
    }
  }

  return dispatcher.useResponder(responder, listenerProps || emptyObject$1);
}
function useTransition(config) {
  var dispatcher = resolveDispatcher();
  return dispatcher.useTransition(config);
}
function useDeferredValue(value, config) {
  var dispatcher = resolveDispatcher();
  return dispatcher.useDeferredValue(value, config);
}

function withSuspenseConfig(scope, config) {
  var previousConfig = ReactCurrentBatchConfig.suspense;
  ReactCurrentBatchConfig.suspense = config === undefined ? null : config;

  try {
    scope();
  } finally {
    ReactCurrentBatchConfig.suspense = previousConfig;
  }
}

/**
 * ReactElementValidator provides a wrapper around a element factory
 * which validates the props passed to the element. This is intended to be
 * used only in DEV and could be replaced by a static type checker for languages
 * that support it.
 */
var propTypesMisspellWarningShown;

{
  propTypesMisspellWarningShown = false;
}

var hasOwnProperty$1 = Object.prototype.hasOwnProperty;

function getDeclarationErrorAddendum() {
  if (ReactCurrentOwner.current) {
    var name = getComponentName(ReactCurrentOwner.current.type);

    if (name) {
      return '\n\nCheck the render method of `' + name + '`.';
    }
  }

  return '';
}

function getSourceInfoErrorAddendum(source) {
  if (source !== undefined) {
    var fileName = source.fileName.replace(/^.*[\\\/]/, '');
    var lineNumber = source.lineNumber;
    return '\n\nCheck your code at ' + fileName + ':' + lineNumber + '.';
  }

  return '';
}

function getSourceInfoErrorAddendumForProps(elementProps) {
  if (elementProps !== null && elementProps !== undefined) {
    return getSourceInfoErrorAddendum(elementProps.__source);
  }

  return '';
}
/**
 * Warn if there's no key explicitly set on dynamic arrays of children or
 * object keys are not valid. This allows us to keep track of children between
 * updates.
 */


var ownerHasKeyUseWarning = {};

function getCurrentComponentErrorInfo(parentType) {
  var info = getDeclarationErrorAddendum();

  if (!info) {
    var parentName = typeof parentType === 'string' ? parentType : parentType.displayName || parentType.name;

    if (parentName) {
      info = "\n\nCheck the top-level render call using <" + parentName + ">.";
    }
  }

  return info;
}
/**
 * Warn if the element doesn't have an explicit key assigned to it.
 * This element is in an array. The array could grow and shrink or be
 * reordered. All children that haven't already been validated are required to
 * have a "key" property assigned to it. Error statuses are cached so a warning
 * will only be shown once.
 *
 * @internal
 * @param {ReactElement} element Element that requires a key.
 * @param {*} parentType element's parent's type.
 */


function validateExplicitKey(element, parentType) {
  if (!element._store || element._store.validated || element.key != null) {
    return;
  }

  element._store.validated = true;
  var currentComponentErrorInfo = getCurrentComponentErrorInfo(parentType);

  if (ownerHasKeyUseWarning[currentComponentErrorInfo]) {
    return;
  }

  ownerHasKeyUseWarning[currentComponentErrorInfo] = true; // Usually the current owner is the offender, but if it accepts children as a
  // property, it may be the creator of the child that's responsible for
  // assigning it a key.

  var childOwner = '';

  if (element && element._owner && element._owner !== ReactCurrentOwner.current) {
    // Give the component that originally created this child.
    childOwner = " It was passed a child from " + getComponentName(element._owner.type) + ".";
  }

  setCurrentlyValidatingElement(element);

  {
    warning$1(false, 'Each child in a list should have a unique "key" prop.' + '%s%s See https://fb.me/react-warning-keys for more information.', currentComponentErrorInfo, childOwner);
  }

  setCurrentlyValidatingElement(null);
}
/**
 * Ensure that every element either is passed in a static location, in an
 * array with an explicit keys property defined, or in an object literal
 * with valid key property.
 *
 * @internal
 * @param {ReactNode} node Statically passed child of any type.
 * @param {*} parentType node's parent's type.
 */


function validateChildKeys(node, parentType) {
  if (typeof node !== 'object') {
    return;
  }

  if (Array.isArray(node)) {
    for (var i = 0; i < node.length; i++) {
      var child = node[i];

      if (isValidElement(child)) {
        validateExplicitKey(child, parentType);
      }
    }
  } else if (isValidElement(node)) {
    // This element was passed in a valid location.
    if (node._store) {
      node._store.validated = true;
    }
  } else if (node) {
    var iteratorFn = getIteratorFn(node);

    if (typeof iteratorFn === 'function') {
      // Entry iterators used to provide implicit keys,
      // but now we print a separate warning for them later.
      if (iteratorFn !== node.entries) {
        var iterator = iteratorFn.call(node);
        var step;

        while (!(step = iterator.next()).done) {
          if (isValidElement(step.value)) {
            validateExplicitKey(step.value, parentType);
          }
        }
      }
    }
  }
}
/**
 * Given an element, validate that its props follow the propTypes definition,
 * provided by the type.
 *
 * @param {ReactElement} element
 */


function validatePropTypes(element) {
  var type = element.type;

  if (type === null || type === undefined || typeof type === 'string') {
    return;
  }

  var name = getComponentName(type);
  var propTypes;

  if (typeof type === 'function') {
    propTypes = type.propTypes;
  } else if (typeof type === 'object' && (type.$$typeof === REACT_FORWARD_REF_TYPE || // Note: Memo only checks outer props here.
  // Inner props are checked in the reconciler.
  type.$$typeof === REACT_MEMO_TYPE)) {
    propTypes = type.propTypes;
  } else {
    return;
  }

  if (propTypes) {
    setCurrentlyValidatingElement(element);
    checkPropTypes(propTypes, element.props, 'prop', name, ReactDebugCurrentFrame.getStackAddendum);
    setCurrentlyValidatingElement(null);
  } else if (type.PropTypes !== undefined && !propTypesMisspellWarningShown) {
    propTypesMisspellWarningShown = true;
    warningWithoutStack$1(false, 'Component %s declared `PropTypes` instead of `propTypes`. Did you misspell the property assignment?', name || 'Unknown');
  }

  if (typeof type.getDefaultProps === 'function') {
    !type.getDefaultProps.isReactClassApproved ? warningWithoutStack$1(false, 'getDefaultProps is only used on classic React.createClass ' + 'definitions. Use a static property named `defaultProps` instead.') : void 0;
  }
}
/**
 * Given a fragment, validate that it can only be provided with fragment props
 * @param {ReactElement} fragment
 */


function validateFragmentProps(fragment) {
  setCurrentlyValidatingElement(fragment);
  var keys = Object.keys(fragment.props);

  for (var i = 0; i < keys.length; i++) {
    var key = keys[i];

    if (key !== 'children' && key !== 'key') {
      warning$1(false, 'Invalid prop `%s` supplied to `React.Fragment`. ' + 'React.Fragment can only have `key` and `children` props.', key);
      break;
    }
  }

  if (fragment.ref !== null) {
    warning$1(false, 'Invalid attribute `ref` supplied to `React.Fragment`.');
  }

  setCurrentlyValidatingElement(null);
}

function jsxWithValidation(type, props, key, isStaticChildren, source, self) {
  var validType = isValidElementType(type); // We warn in this case but don't throw. We expect the element creation to
  // succeed and there will likely be errors in render.

  if (!validType) {
    var info = '';

    if (type === undefined || typeof type === 'object' && type !== null && Object.keys(type).length === 0) {
      info += ' You likely forgot to export your component from the file ' + "it's defined in, or you might have mixed up default and named imports.";
    }

    var sourceInfo = getSourceInfoErrorAddendum(source);

    if (sourceInfo) {
      info += sourceInfo;
    } else {
      info += getDeclarationErrorAddendum();
    }

    var typeString;

    if (type === null) {
      typeString = 'null';
    } else if (Array.isArray(type)) {
      typeString = 'array';
    } else if (type !== undefined && type.$$typeof === REACT_ELEMENT_TYPE) {
      typeString = "<" + (getComponentName(type.type) || 'Unknown') + " />";
      info = ' Did you accidentally export a JSX literal instead of a component?';
    } else {
      typeString = typeof type;
    }

    warning$1(false, 'React.jsx: type is invalid -- expected a string (for ' + 'built-in components) or a class/function (for composite ' + 'components) but got: %s.%s', typeString, info);
  }

  var element = jsxDEV(type, props, key, source, self); // The result can be nullish if a mock or a custom function is used.
  // TODO: Drop this when these are no longer allowed as the type argument.

  if (element == null) {
    return element;
  } // Skip key warning if the type isn't valid since our key validation logic
  // doesn't expect a non-string/function type and can throw confusing errors.
  // We don't want exception behavior to differ between dev and prod.
  // (Rendering will throw with a helpful message and as soon as the type is
  // fixed, the key warnings will appear.)


  if (validType) {
    var children = props.children;

    if (children !== undefined) {
      if (isStaticChildren) {
        if (Array.isArray(children)) {
          for (var i = 0; i < children.length; i++) {
            validateChildKeys(children[i], type);
          }

          if (Object.freeze) {
            Object.freeze(children);
          }
        } else {
          warning$1(false, 'React.jsx: Static children should always be an array. ' + 'You are likely explicitly calling React.jsxs or React.jsxDEV. ' + 'Use the Babel transform instead.');
        }
      } else {
        validateChildKeys(children, type);
      }
    }
  }

  if (hasOwnProperty$1.call(props, 'key')) {
    warning$1(false, 'React.jsx: Spreading a key to JSX is a deprecated pattern. ' + 'Explicitly pass a key after spreading props in your JSX call. ' + 'E.g. <ComponentName {...props} key={key} />');
  }

  if (type === REACT_FRAGMENT_TYPE) {
    validateFragmentProps(element);
  } else {
    validatePropTypes(element);
  }

  return element;
} // These two functions exist to still get child warnings in dev
// even with the prod transform. This means that jsxDEV is purely
// opt-in behavior for better messages but that we won't stop
// giving you warnings if you use production apis.

function jsxWithValidationStatic(type, props, key) {
  return jsxWithValidation(type, props, key, true);
}
function jsxWithValidationDynamic(type, props, key) {
  return jsxWithValidation(type, props, key, false);
}
function createElementWithValidation(type, props, children) {
  var validType = isValidElementType(type); // We warn in this case but don't throw. We expect the element creation to
  // succeed and there will likely be errors in render.

  if (!validType) {
    var info = '';

    if (type === undefined || typeof type === 'object' && type !== null && Object.keys(type).length === 0) {
      info += ' You likely forgot to export your component from the file ' + "it's defined in, or you might have mixed up default and named imports.";
    }

    var sourceInfo = getSourceInfoErrorAddendumForProps(props);

    if (sourceInfo) {
      info += sourceInfo;
    } else {
      info += getDeclarationErrorAddendum();
    }

    var typeString;

    if (type === null) {
      typeString = 'null';
    } else if (Array.isArray(type)) {
      typeString = 'array';
    } else if (type !== undefined && type.$$typeof === REACT_ELEMENT_TYPE) {
      typeString = "<" + (getComponentName(type.type) || 'Unknown') + " />";
      info = ' Did you accidentally export a JSX literal instead of a component?';
    } else {
      typeString = typeof type;
    }

    warning$1(false, 'React.createElement: type is invalid -- expected a string (for ' + 'built-in components) or a class/function (for composite ' + 'components) but got: %s.%s', typeString, info);
  }

  var element = createElement.apply(this, arguments); // The result can be nullish if a mock or a custom function is used.
  // TODO: Drop this when these are no longer allowed as the type argument.

  if (element == null) {
    return element;
  } // Skip key warning if the type isn't valid since our key validation logic
  // doesn't expect a non-string/function type and can throw confusing errors.
  // We don't want exception behavior to differ between dev and prod.
  // (Rendering will throw with a helpful message and as soon as the type is
  // fixed, the key warnings will appear.)


  if (validType) {
    for (var i = 2; i < arguments.length; i++) {
      validateChildKeys(arguments[i], type);
    }
  }

  if (type === REACT_FRAGMENT_TYPE) {
    validateFragmentProps(element);
  } else {
    validatePropTypes(element);
  }

  return element;
}
function createFactoryWithValidation(type) {
  var validatedFactory = createElementWithValidation.bind(null, type);
  validatedFactory.type = type; // Legacy hook: remove it

  {
    Object.defineProperty(validatedFactory, 'type', {
      enumerable: false,
      get: function () {
        lowPriorityWarningWithoutStack$1(false, 'Factory.type is deprecated. Access the class directly ' + 'before passing it to createFactory.');
        Object.defineProperty(this, 'type', {
          value: type
        });
        return type;
      }
    });
  }

  return validatedFactory;
}
function cloneElementWithValidation(element, props, children) {
  var newElement = cloneElement.apply(this, arguments);

  for (var i = 2; i < arguments.length; i++) {
    validateChildKeys(arguments[i], newElement.type);
  }

  validatePropTypes(newElement);
  return newElement;
}

var hasBadMapPolyfill;

{
  hasBadMapPolyfill = false;

  try {
    var frozenObject = Object.freeze({});
    var testMap = new Map([[frozenObject, null]]);
    var testSet = new Set([frozenObject]); // This is necessary for Rollup to not consider these unused.
    // https://github.com/rollup/rollup/issues/1771
    // TODO: we can remove these if Rollup fixes the bug.

    testMap.set(0, 0);
    testSet.add(0);
  } catch (e) {
    // TODO: Consider warning about bad polyfills
    hasBadMapPolyfill = true;
  }
}

function createFundamentalComponent(impl) {
  // We use responder as a Map key later on. When we have a bad
  // polyfill, then we can't use it as a key as the polyfill tries
  // to add a property to the object.
  if (true && !hasBadMapPolyfill) {
    Object.freeze(impl);
  }

  var fundamantalComponent = {
    $$typeof: REACT_FUNDAMENTAL_TYPE,
    impl: impl
  };

  {
    Object.freeze(fundamantalComponent);
  }

  return fundamantalComponent;
}

function createEventResponder(displayName, responderConfig) {
  var getInitialState = responderConfig.getInitialState,
      onEvent = responderConfig.onEvent,
      onMount = responderConfig.onMount,
      onUnmount = responderConfig.onUnmount,
      onRootEvent = responderConfig.onRootEvent,
      rootEventTypes = responderConfig.rootEventTypes,
      targetEventTypes = responderConfig.targetEventTypes,
      targetPortalPropagation = responderConfig.targetPortalPropagation;
  var eventResponder = {
    $$typeof: REACT_RESPONDER_TYPE,
    displayName: displayName,
    getInitialState: getInitialState || null,
    onEvent: onEvent || null,
    onMount: onMount || null,
    onRootEvent: onRootEvent || null,
    onUnmount: onUnmount || null,
    rootEventTypes: rootEventTypes || null,
    targetEventTypes: targetEventTypes || null,
    targetPortalPropagation: targetPortalPropagation || false
  }; // We use responder as a Map key later on. When we have a bad
  // polyfill, then we can't use it as a key as the polyfill tries
  // to add a property to the object.

  if (true && !hasBadMapPolyfill) {
    Object.freeze(eventResponder);
  }

  return eventResponder;
}

function createScope() {
  var scopeComponent = {
    $$typeof: REACT_SCOPE_TYPE
  };

  {
    Object.freeze(scopeComponent);
  }

  return scopeComponent;
}

// Helps identify side effects in begin-phase lifecycle hooks and setState reducers:

 // In some cases, StrictMode should also double-render lifecycles.
// This can be confusing for tests though,
// And it can be bad for performance in production.
// This feature flag can be used to control the behavior:

 // To preserve the "Pause on caught exceptions" behavior of the debugger, we
// replay the begin phase of a failed component inside invokeGuardedCallback.

 // Warn about deprecated, async-unsafe lifecycles; relates to RFC #6:

 // Gather advanced timing metrics for Profiler subtrees.

 // Trace which interactions trigger each commit.

 // SSR experiments


 // Only used in www builds.

 // Only used in www builds.

 // Disable javascript: URL strings in href for XSS protection.

 // React Fire: prevent the value and checked attributes from syncing
// with their related DOM properties

 // These APIs will no longer be "unstable" in the upcoming 16.7 release,
// Control this behavior with a flag to support 16.6 minor releases in the meanwhile.

var exposeConcurrentModeAPIs = false;
 // Experimental React Flare event system and event components support.

var enableFlareAPI = false; // Experimental Host Component support.

var enableFundamentalAPI = false; // Experimental Scope support.

var enableScopeAPI = false; // New API for JSX transforms to target - https://github.com/reactjs/rfcs/pull/107

var enableJSXTransformAPI = false; // We will enforce mocking scheduler with scheduler/unstable_mock at some point. (v17?)
// Till then, we warn about the missing mock, but still fallback to a sync mode compatible version

 // For tests, we flush suspense fallbacks in an act scope;
// *except* in some of our own tests, where we test incremental loading states.

 // Add a callback property to suspense to notify which promises are currently
// in the update queue. This allows reporting and tracing of what is causing
// the user to see a loading state.
// Also allows hydration callbacks to fire when a dehydrated boundary gets
// hydrated or deleted.

 // Part of the simplification of React.createElement so we can eventually move
// from React.createElement to React.jsx
// https://github.com/reactjs/rfcs/blob/createlement-rfc/text/0000-create-element-changes.md

var React = {
  Children: {
    map: mapChildren,
    forEach: forEachChildren,
    count: countChildren,
    toArray: toArray,
    only: onlyChild
  },
  createRef: createRef,
  Component: Component,
  PureComponent: PureComponent,
  createContext: createContext,
  forwardRef: forwardRef,
  lazy: lazy,
  memo: memo,
  useCallback: useCallback,
  useContext: useContext,
  useEffect: useEffect,
  useImperativeHandle: useImperativeHandle,
  useDebugValue: useDebugValue,
  useLayoutEffect: useLayoutEffect,
  useMemo: useMemo,
  useReducer: useReducer,
  useRef: useRef,
  useState: useState,
  Fragment: REACT_FRAGMENT_TYPE,
  Profiler: REACT_PROFILER_TYPE,
  StrictMode: REACT_STRICT_MODE_TYPE,
  Suspense: REACT_SUSPENSE_TYPE,
  createElement: createElementWithValidation,
  cloneElement: cloneElementWithValidation,
  createFactory: createFactoryWithValidation,
  isValidElement: isValidElement,
  version: ReactVersion,
  __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED: ReactSharedInternals
};

if (exposeConcurrentModeAPIs) {
  React.useTransition = useTransition;
  React.useDeferredValue = useDeferredValue;
  React.SuspenseList = REACT_SUSPENSE_LIST_TYPE;
  React.unstable_withSuspenseConfig = withSuspenseConfig;
}

if (enableFlareAPI) {
  React.unstable_useResponder = useResponder;
  React.unstable_createResponder = createEventResponder;
}

if (enableFundamentalAPI) {
  React.unstable_createFundamental = createFundamentalComponent;
}

if (enableScopeAPI) {
  React.unstable_createScope = createScope;
} // Note: some APIs are added with feature flags.
// Make sure that stable builds for open source
// don't modify the React object to avoid deopts.
// Also let's not expose their names in stable builds.


if (enableJSXTransformAPI) {
  {
    React.jsxDEV = jsxWithValidation;
    React.jsx = jsxWithValidationDynamic;
    React.jsxs = jsxWithValidationStatic;
  }
}



var React$2 = Object.freeze({
	default: React
});

var React$3 = ( React$2 && React ) || React$2;

// TODO: decide on the top-level export form.
// This is hacky but makes it work with both Rollup and Jest.


var react = React$3.default || React$3;

module.exports = react;
  })();
}

}).call(this,require('_process'))
},{"_process":11,"object-assign":10,"prop-types/checkPropTypes":12}],34:[function(require,module,exports){
/** @license React v16.11.0
 * react.production.min.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';var h=require("object-assign"),n="function"===typeof Symbol&&Symbol.for,p=n?Symbol.for("react.element"):60103,q=n?Symbol.for("react.portal"):60106,r=n?Symbol.for("react.fragment"):60107,t=n?Symbol.for("react.strict_mode"):60108,u=n?Symbol.for("react.profiler"):60114,v=n?Symbol.for("react.provider"):60109,w=n?Symbol.for("react.context"):60110,x=n?Symbol.for("react.forward_ref"):60112,y=n?Symbol.for("react.suspense"):60113;n&&Symbol.for("react.suspense_list");
var z=n?Symbol.for("react.memo"):60115,aa=n?Symbol.for("react.lazy"):60116;n&&Symbol.for("react.fundamental");n&&Symbol.for("react.responder");n&&Symbol.for("react.scope");var A="function"===typeof Symbol&&Symbol.iterator;
function B(a){for(var b="https://reactjs.org/docs/error-decoder.html?invariant="+a,c=1;c<arguments.length;c++)b+="&args[]="+encodeURIComponent(arguments[c]);return"Minified React error #"+a+"; visit "+b+" for the full message or use the non-minified dev environment for full errors and additional helpful warnings."}var C={isMounted:function(){return!1},enqueueForceUpdate:function(){},enqueueReplaceState:function(){},enqueueSetState:function(){}},D={};
function E(a,b,c){this.props=a;this.context=b;this.refs=D;this.updater=c||C}E.prototype.isReactComponent={};E.prototype.setState=function(a,b){if("object"!==typeof a&&"function"!==typeof a&&null!=a)throw Error(B(85));this.updater.enqueueSetState(this,a,b,"setState")};E.prototype.forceUpdate=function(a){this.updater.enqueueForceUpdate(this,a,"forceUpdate")};function F(){}F.prototype=E.prototype;function G(a,b,c){this.props=a;this.context=b;this.refs=D;this.updater=c||C}var H=G.prototype=new F;
H.constructor=G;h(H,E.prototype);H.isPureReactComponent=!0;var I={current:null},J={current:null},K=Object.prototype.hasOwnProperty,L={key:!0,ref:!0,__self:!0,__source:!0};
function M(a,b,c){var e,d={},g=null,l=null;if(null!=b)for(e in void 0!==b.ref&&(l=b.ref),void 0!==b.key&&(g=""+b.key),b)K.call(b,e)&&!L.hasOwnProperty(e)&&(d[e]=b[e]);var f=arguments.length-2;if(1===f)d.children=c;else if(1<f){for(var k=Array(f),m=0;m<f;m++)k[m]=arguments[m+2];d.children=k}if(a&&a.defaultProps)for(e in f=a.defaultProps,f)void 0===d[e]&&(d[e]=f[e]);return{$$typeof:p,type:a,key:g,ref:l,props:d,_owner:J.current}}
function ba(a,b){return{$$typeof:p,type:a.type,key:b,ref:a.ref,props:a.props,_owner:a._owner}}function N(a){return"object"===typeof a&&null!==a&&a.$$typeof===p}function escape(a){var b={"=":"=0",":":"=2"};return"$"+(""+a).replace(/[=:]/g,function(a){return b[a]})}var O=/\/+/g,P=[];function Q(a,b,c,e){if(P.length){var d=P.pop();d.result=a;d.keyPrefix=b;d.func=c;d.context=e;d.count=0;return d}return{result:a,keyPrefix:b,func:c,context:e,count:0}}
function R(a){a.result=null;a.keyPrefix=null;a.func=null;a.context=null;a.count=0;10>P.length&&P.push(a)}
function S(a,b,c,e){var d=typeof a;if("undefined"===d||"boolean"===d)a=null;var g=!1;if(null===a)g=!0;else switch(d){case "string":case "number":g=!0;break;case "object":switch(a.$$typeof){case p:case q:g=!0}}if(g)return c(e,a,""===b?"."+T(a,0):b),1;g=0;b=""===b?".":b+":";if(Array.isArray(a))for(var l=0;l<a.length;l++){d=a[l];var f=b+T(d,l);g+=S(d,f,c,e)}else if(null===a||"object"!==typeof a?f=null:(f=A&&a[A]||a["@@iterator"],f="function"===typeof f?f:null),"function"===typeof f)for(a=f.call(a),l=
0;!(d=a.next()).done;)d=d.value,f=b+T(d,l++),g+=S(d,f,c,e);else if("object"===d)throw c=""+a,Error(B(31,"[object Object]"===c?"object with keys {"+Object.keys(a).join(", ")+"}":c,""));return g}function U(a,b,c){return null==a?0:S(a,"",b,c)}function T(a,b){return"object"===typeof a&&null!==a&&null!=a.key?escape(a.key):b.toString(36)}function ca(a,b){a.func.call(a.context,b,a.count++)}
function da(a,b,c){var e=a.result,d=a.keyPrefix;a=a.func.call(a.context,b,a.count++);Array.isArray(a)?V(a,e,c,function(a){return a}):null!=a&&(N(a)&&(a=ba(a,d+(!a.key||b&&b.key===a.key?"":(""+a.key).replace(O,"$&/")+"/")+c)),e.push(a))}function V(a,b,c,e,d){var g="";null!=c&&(g=(""+c).replace(O,"$&/")+"/");b=Q(b,g,e,d);U(a,da,b);R(b)}function W(){var a=I.current;if(null===a)throw Error(B(321));return a}
var X={Children:{map:function(a,b,c){if(null==a)return a;var e=[];V(a,e,null,b,c);return e},forEach:function(a,b,c){if(null==a)return a;b=Q(null,null,b,c);U(a,ca,b);R(b)},count:function(a){return U(a,function(){return null},null)},toArray:function(a){var b=[];V(a,b,null,function(a){return a});return b},only:function(a){if(!N(a))throw Error(B(143));return a}},createRef:function(){return{current:null}},Component:E,PureComponent:G,createContext:function(a,b){void 0===b&&(b=null);a={$$typeof:w,_calculateChangedBits:b,
_currentValue:a,_currentValue2:a,_threadCount:0,Provider:null,Consumer:null};a.Provider={$$typeof:v,_context:a};return a.Consumer=a},forwardRef:function(a){return{$$typeof:x,render:a}},lazy:function(a){return{$$typeof:aa,_ctor:a,_status:-1,_result:null}},memo:function(a,b){return{$$typeof:z,type:a,compare:void 0===b?null:b}},useCallback:function(a,b){return W().useCallback(a,b)},useContext:function(a,b){return W().useContext(a,b)},useEffect:function(a,b){return W().useEffect(a,b)},useImperativeHandle:function(a,
b,c){return W().useImperativeHandle(a,b,c)},useDebugValue:function(){},useLayoutEffect:function(a,b){return W().useLayoutEffect(a,b)},useMemo:function(a,b){return W().useMemo(a,b)},useReducer:function(a,b,c){return W().useReducer(a,b,c)},useRef:function(a){return W().useRef(a)},useState:function(a){return W().useState(a)},Fragment:r,Profiler:u,StrictMode:t,Suspense:y,createElement:M,cloneElement:function(a,b,c){if(null===a||void 0===a)throw Error(B(267,a));var e=h({},a.props),d=a.key,g=a.ref,l=a._owner;
if(null!=b){void 0!==b.ref&&(g=b.ref,l=J.current);void 0!==b.key&&(d=""+b.key);if(a.type&&a.type.defaultProps)var f=a.type.defaultProps;for(k in b)K.call(b,k)&&!L.hasOwnProperty(k)&&(e[k]=void 0===b[k]&&void 0!==f?f[k]:b[k])}var k=arguments.length-2;if(1===k)e.children=c;else if(1<k){f=Array(k);for(var m=0;m<k;m++)f[m]=arguments[m+2];e.children=f}return{$$typeof:p,type:a.type,key:d,ref:g,props:e,_owner:l}},createFactory:function(a){var b=M.bind(null,a);b.type=a;return b},isValidElement:N,version:"16.11.0",
__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED:{ReactCurrentDispatcher:I,ReactCurrentBatchConfig:{suspense:null},ReactCurrentOwner:J,IsSomeRendererActing:{current:!1},assign:h}},Y={default:X},Z=Y&&X||Y;module.exports=Z.default||Z;

},{"object-assign":10}],35:[function(require,module,exports){
(function (process){
'use strict';

if (process.env.NODE_ENV === 'production') {
  module.exports = require('./cjs/react.production.min.js');
} else {
  module.exports = require('./cjs/react.development.js');
}

}).call(this,require('_process'))
},{"./cjs/react.development.js":33,"./cjs/react.production.min.js":34,"_process":11}],36:[function(require,module,exports){
(function (process){
/** @license React v0.17.0
 * scheduler-tracing.development.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';



if (process.env.NODE_ENV !== "production") {
  (function() {
'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

// Helps identify side effects in begin-phase lifecycle hooks and setState reducers:

 // In some cases, StrictMode should also double-render lifecycles.
// This can be confusing for tests though,
// And it can be bad for performance in production.
// This feature flag can be used to control the behavior:

 // To preserve the "Pause on caught exceptions" behavior of the debugger, we
// replay the begin phase of a failed component inside invokeGuardedCallback.

 // Warn about deprecated, async-unsafe lifecycles; relates to RFC #6:

 // Gather advanced timing metrics for Profiler subtrees.

 // Trace which interactions trigger each commit.

var enableSchedulerTracing = true; // SSR experiments


 // Only used in www builds.

 // Only used in www builds.

 // Disable javascript: URL strings in href for XSS protection.

 // React Fire: prevent the value and checked attributes from syncing
// with their related DOM properties

 // These APIs will no longer be "unstable" in the upcoming 16.7 release,
// Control this behavior with a flag to support 16.6 minor releases in the meanwhile.


 // Experimental React Flare event system and event components support.

 // Experimental Host Component support.

 // Experimental Scope support.

 // New API for JSX transforms to target - https://github.com/reactjs/rfcs/pull/107

 // We will enforce mocking scheduler with scheduler/unstable_mock at some point. (v17?)
// Till then, we warn about the missing mock, but still fallback to a sync mode compatible version

 // For tests, we flush suspense fallbacks in an act scope;
// *except* in some of our own tests, where we test incremental loading states.

 // Add a callback property to suspense to notify which promises are currently
// in the update queue. This allows reporting and tracing of what is causing
// the user to see a loading state.
// Also allows hydration callbacks to fire when a dehydrated boundary gets
// hydrated or deleted.

 // Part of the simplification of React.createElement so we can eventually move
// from React.createElement to React.jsx
// https://github.com/reactjs/rfcs/blob/createlement-rfc/text/0000-create-element-changes.md

var DEFAULT_THREAD_ID = 0; // Counters used to generate unique IDs.

var interactionIDCounter = 0;
var threadIDCounter = 0; // Set of currently traced interactions.
// Interactions "stack"–
// Meaning that newly traced interactions are appended to the previously active set.
// When an interaction goes out of scope, the previous set (if any) is restored.

exports.__interactionsRef = null; // Listener(s) to notify when interactions begin and end.

exports.__subscriberRef = null;

if (enableSchedulerTracing) {
  exports.__interactionsRef = {
    current: new Set()
  };
  exports.__subscriberRef = {
    current: null
  };
}

function unstable_clear(callback) {
  if (!enableSchedulerTracing) {
    return callback();
  }

  var prevInteractions = exports.__interactionsRef.current;
  exports.__interactionsRef.current = new Set();

  try {
    return callback();
  } finally {
    exports.__interactionsRef.current = prevInteractions;
  }
}
function unstable_getCurrent() {
  if (!enableSchedulerTracing) {
    return null;
  } else {
    return exports.__interactionsRef.current;
  }
}
function unstable_getThreadID() {
  return ++threadIDCounter;
}
function unstable_trace(name, timestamp, callback) {
  var threadID = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : DEFAULT_THREAD_ID;

  if (!enableSchedulerTracing) {
    return callback();
  }

  var interaction = {
    __count: 1,
    id: interactionIDCounter++,
    name: name,
    timestamp: timestamp
  };
  var prevInteractions = exports.__interactionsRef.current; // Traced interactions should stack/accumulate.
  // To do that, clone the current interactions.
  // The previous set will be restored upon completion.

  var interactions = new Set(prevInteractions);
  interactions.add(interaction);
  exports.__interactionsRef.current = interactions;
  var subscriber = exports.__subscriberRef.current;
  var returnValue;

  try {
    if (subscriber !== null) {
      subscriber.onInteractionTraced(interaction);
    }
  } finally {
    try {
      if (subscriber !== null) {
        subscriber.onWorkStarted(interactions, threadID);
      }
    } finally {
      try {
        returnValue = callback();
      } finally {
        exports.__interactionsRef.current = prevInteractions;

        try {
          if (subscriber !== null) {
            subscriber.onWorkStopped(interactions, threadID);
          }
        } finally {
          interaction.__count--; // If no async work was scheduled for this interaction,
          // Notify subscribers that it's completed.

          if (subscriber !== null && interaction.__count === 0) {
            subscriber.onInteractionScheduledWorkCompleted(interaction);
          }
        }
      }
    }
  }

  return returnValue;
}
function unstable_wrap(callback) {
  var threadID = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : DEFAULT_THREAD_ID;

  if (!enableSchedulerTracing) {
    return callback;
  }

  var wrappedInteractions = exports.__interactionsRef.current;
  var subscriber = exports.__subscriberRef.current;

  if (subscriber !== null) {
    subscriber.onWorkScheduled(wrappedInteractions, threadID);
  } // Update the pending async work count for the current interactions.
  // Update after calling subscribers in case of error.


  wrappedInteractions.forEach(function (interaction) {
    interaction.__count++;
  });
  var hasRun = false;

  function wrapped() {
    var prevInteractions = exports.__interactionsRef.current;
    exports.__interactionsRef.current = wrappedInteractions;
    subscriber = exports.__subscriberRef.current;

    try {
      var returnValue;

      try {
        if (subscriber !== null) {
          subscriber.onWorkStarted(wrappedInteractions, threadID);
        }
      } finally {
        try {
          returnValue = callback.apply(undefined, arguments);
        } finally {
          exports.__interactionsRef.current = prevInteractions;

          if (subscriber !== null) {
            subscriber.onWorkStopped(wrappedInteractions, threadID);
          }
        }
      }

      return returnValue;
    } finally {
      if (!hasRun) {
        // We only expect a wrapped function to be executed once,
        // But in the event that it's executed more than once–
        // Only decrement the outstanding interaction counts once.
        hasRun = true; // Update pending async counts for all wrapped interactions.
        // If this was the last scheduled async work for any of them,
        // Mark them as completed.

        wrappedInteractions.forEach(function (interaction) {
          interaction.__count--;

          if (subscriber !== null && interaction.__count === 0) {
            subscriber.onInteractionScheduledWorkCompleted(interaction);
          }
        });
      }
    }
  }

  wrapped.cancel = function cancel() {
    subscriber = exports.__subscriberRef.current;

    try {
      if (subscriber !== null) {
        subscriber.onWorkCanceled(wrappedInteractions, threadID);
      }
    } finally {
      // Update pending async counts for all wrapped interactions.
      // If this was the last scheduled async work for any of them,
      // Mark them as completed.
      wrappedInteractions.forEach(function (interaction) {
        interaction.__count--;

        if (subscriber && interaction.__count === 0) {
          subscriber.onInteractionScheduledWorkCompleted(interaction);
        }
      });
    }
  };

  return wrapped;
}

var subscribers = null;

if (enableSchedulerTracing) {
  subscribers = new Set();
}

function unstable_subscribe(subscriber) {
  if (enableSchedulerTracing) {
    subscribers.add(subscriber);

    if (subscribers.size === 1) {
      exports.__subscriberRef.current = {
        onInteractionScheduledWorkCompleted: onInteractionScheduledWorkCompleted,
        onInteractionTraced: onInteractionTraced,
        onWorkCanceled: onWorkCanceled,
        onWorkScheduled: onWorkScheduled,
        onWorkStarted: onWorkStarted,
        onWorkStopped: onWorkStopped
      };
    }
  }
}
function unstable_unsubscribe(subscriber) {
  if (enableSchedulerTracing) {
    subscribers.delete(subscriber);

    if (subscribers.size === 0) {
      exports.__subscriberRef.current = null;
    }
  }
}

function onInteractionTraced(interaction) {
  var didCatchError = false;
  var caughtError = null;
  subscribers.forEach(function (subscriber) {
    try {
      subscriber.onInteractionTraced(interaction);
    } catch (error) {
      if (!didCatchError) {
        didCatchError = true;
        caughtError = error;
      }
    }
  });

  if (didCatchError) {
    throw caughtError;
  }
}

function onInteractionScheduledWorkCompleted(interaction) {
  var didCatchError = false;
  var caughtError = null;
  subscribers.forEach(function (subscriber) {
    try {
      subscriber.onInteractionScheduledWorkCompleted(interaction);
    } catch (error) {
      if (!didCatchError) {
        didCatchError = true;
        caughtError = error;
      }
    }
  });

  if (didCatchError) {
    throw caughtError;
  }
}

function onWorkScheduled(interactions, threadID) {
  var didCatchError = false;
  var caughtError = null;
  subscribers.forEach(function (subscriber) {
    try {
      subscriber.onWorkScheduled(interactions, threadID);
    } catch (error) {
      if (!didCatchError) {
        didCatchError = true;
        caughtError = error;
      }
    }
  });

  if (didCatchError) {
    throw caughtError;
  }
}

function onWorkStarted(interactions, threadID) {
  var didCatchError = false;
  var caughtError = null;
  subscribers.forEach(function (subscriber) {
    try {
      subscriber.onWorkStarted(interactions, threadID);
    } catch (error) {
      if (!didCatchError) {
        didCatchError = true;
        caughtError = error;
      }
    }
  });

  if (didCatchError) {
    throw caughtError;
  }
}

function onWorkStopped(interactions, threadID) {
  var didCatchError = false;
  var caughtError = null;
  subscribers.forEach(function (subscriber) {
    try {
      subscriber.onWorkStopped(interactions, threadID);
    } catch (error) {
      if (!didCatchError) {
        didCatchError = true;
        caughtError = error;
      }
    }
  });

  if (didCatchError) {
    throw caughtError;
  }
}

function onWorkCanceled(interactions, threadID) {
  var didCatchError = false;
  var caughtError = null;
  subscribers.forEach(function (subscriber) {
    try {
      subscriber.onWorkCanceled(interactions, threadID);
    } catch (error) {
      if (!didCatchError) {
        didCatchError = true;
        caughtError = error;
      }
    }
  });

  if (didCatchError) {
    throw caughtError;
  }
}

exports.unstable_clear = unstable_clear;
exports.unstable_getCurrent = unstable_getCurrent;
exports.unstable_getThreadID = unstable_getThreadID;
exports.unstable_trace = unstable_trace;
exports.unstable_wrap = unstable_wrap;
exports.unstable_subscribe = unstable_subscribe;
exports.unstable_unsubscribe = unstable_unsubscribe;
  })();
}

}).call(this,require('_process'))
},{"_process":11}],37:[function(require,module,exports){
/** @license React v0.17.0
 * scheduler-tracing.production.min.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';Object.defineProperty(exports,"__esModule",{value:!0});var b=0;exports.__interactionsRef=null;exports.__subscriberRef=null;exports.unstable_clear=function(a){return a()};exports.unstable_getCurrent=function(){return null};exports.unstable_getThreadID=function(){return++b};exports.unstable_trace=function(a,d,c){return c()};exports.unstable_wrap=function(a){return a};exports.unstable_subscribe=function(){};exports.unstable_unsubscribe=function(){};

},{}],38:[function(require,module,exports){
(function (process){
/** @license React v0.17.0
 * scheduler.development.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';



if (process.env.NODE_ENV !== "production") {
  (function() {
'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var enableSchedulerDebugging = false;
var enableIsInputPending = false;
var enableMessageLoopImplementation = true;
var enableProfiling = true;

// works by scheduling a requestAnimationFrame, storing the time for the start
// of the frame, then scheduling a postMessage which gets scheduled after paint.
// Within the postMessage handler do as much work as possible until time + frame
// rate. By separating the idle call into a separate event tick we ensure that
// layout, paint and other browser work is counted against the available time.
// The frame rate is dynamically adjusted.

var requestHostCallback;

var requestHostTimeout;
var cancelHostTimeout;
var shouldYieldToHost;
var requestPaint;



if ( // If Scheduler runs in a non-DOM environment, it falls back to a naive
// implementation using setTimeout.
typeof window === 'undefined' || // Check if MessageChannel is supported, too.
typeof MessageChannel !== 'function') {
  // If this accidentally gets imported in a non-browser environment, e.g. JavaScriptCore,
  // fallback to a naive implementation.
  var _callback = null;
  var _timeoutID = null;

  var _flushCallback = function () {
    if (_callback !== null) {
      try {
        var currentTime = exports.unstable_now();
        var hasRemainingTime = true;

        _callback(hasRemainingTime, currentTime);

        _callback = null;
      } catch (e) {
        setTimeout(_flushCallback, 0);
        throw e;
      }
    }
  };

  var initialTime = Date.now();

  exports.unstable_now = function () {
    return Date.now() - initialTime;
  };

  requestHostCallback = function (cb) {
    if (_callback !== null) {
      // Protect against re-entrancy.
      setTimeout(requestHostCallback, 0, cb);
    } else {
      _callback = cb;
      setTimeout(_flushCallback, 0);
    }
  };

  requestHostTimeout = function (cb, ms) {
    _timeoutID = setTimeout(cb, ms);
  };

  cancelHostTimeout = function () {
    clearTimeout(_timeoutID);
  };

  shouldYieldToHost = function () {
    return false;
  };

  requestPaint = exports.unstable_forceFrameRate = function () {};
} else {
  // Capture local references to native APIs, in case a polyfill overrides them.
  var performance = window.performance;
  var _Date = window.Date;
  var _setTimeout = window.setTimeout;
  var _clearTimeout = window.clearTimeout;
  var requestAnimationFrame = window.requestAnimationFrame;
  var cancelAnimationFrame = window.cancelAnimationFrame;

  if (typeof console !== 'undefined') {
    // TODO: Remove fb.me link
    if (typeof requestAnimationFrame !== 'function') {
      console.error("This browser doesn't support requestAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills');
    }

    if (typeof cancelAnimationFrame !== 'function') {
      console.error("This browser doesn't support cancelAnimationFrame. " + 'Make sure that you load a ' + 'polyfill in older browsers. https://fb.me/react-polyfills');
    }
  }

  if (typeof performance === 'object' && typeof performance.now === 'function') {
    exports.unstable_now = function () {
      return performance.now();
    };
  } else {
    var _initialTime = _Date.now();

    exports.unstable_now = function () {
      return _Date.now() - _initialTime;
    };
  }

  var isRAFLoopRunning = false;
  var isMessageLoopRunning = false;
  var scheduledHostCallback = null;
  var rAFTimeoutID = -1;
  var taskTimeoutID = -1;
  var frameLength = enableMessageLoopImplementation ? // We won't attempt to align with the vsync. Instead we'll yield multiple
  // times per frame, often enough to keep it responsive even at really
  // high frame rates > 120.
  5 : // Use a heuristic to measure the frame rate and yield at the end of the
  // frame. We start out assuming that we run at 30fps but then the
  // heuristic tracking will adjust this value to a faster fps if we get
  // more frequent animation frames.
  33.33;
  var prevRAFTime = -1;
  var prevRAFInterval = -1;
  var frameDeadline = 0;
  var fpsLocked = false; // TODO: Make this configurable
  // TODO: Adjust this based on priority?

  var maxFrameLength = 300;
  var needsPaint = false;

  if (enableIsInputPending && navigator !== undefined && navigator.scheduling !== undefined && navigator.scheduling.isInputPending !== undefined) {
    var scheduling = navigator.scheduling;

    shouldYieldToHost = function () {
      var currentTime = exports.unstable_now();

      if (currentTime >= frameDeadline) {
        // There's no time left in the frame. We may want to yield control of
        // the main thread, so the browser can perform high priority tasks. The
        // main ones are painting and user input. If there's a pending paint or
        // a pending input, then we should yield. But if there's neither, then
        // we can yield less often while remaining responsive. We'll eventually
        // yield regardless, since there could be a pending paint that wasn't
        // accompanied by a call to `requestPaint`, or other main thread tasks
        // like network events.
        if (needsPaint || scheduling.isInputPending()) {
          // There is either a pending paint or a pending input.
          return true;
        } // There's no pending input. Only yield if we've reached the max
        // frame length.


        return currentTime >= frameDeadline + maxFrameLength;
      } else {
        // There's still time left in the frame.
        return false;
      }
    };

    requestPaint = function () {
      needsPaint = true;
    };
  } else {
    // `isInputPending` is not available. Since we have no way of knowing if
    // there's pending input, always yield at the end of the frame.
    shouldYieldToHost = function () {
      return exports.unstable_now() >= frameDeadline;
    }; // Since we yield every frame regardless, `requestPaint` has no effect.


    requestPaint = function () {};
  }

  exports.unstable_forceFrameRate = function (fps) {
    if (fps < 0 || fps > 125) {
      console.error('forceFrameRate takes a positive int between 0 and 125, ' + 'forcing framerates higher than 125 fps is not unsupported');
      return;
    }

    if (fps > 0) {
      frameLength = Math.floor(1000 / fps);
      fpsLocked = true;
    } else {
      // reset the framerate
      frameLength = 33.33;
      fpsLocked = false;
    }
  };

  var performWorkUntilDeadline = function () {
    if (enableMessageLoopImplementation) {
      if (scheduledHostCallback !== null) {
        var currentTime = exports.unstable_now(); // Yield after `frameLength` ms, regardless of where we are in the vsync
        // cycle. This means there's always time remaining at the beginning of
        // the message event.

        frameDeadline = currentTime + frameLength;
        var hasTimeRemaining = true;

        try {
          var hasMoreWork = scheduledHostCallback(hasTimeRemaining, currentTime);

          if (!hasMoreWork) {
            isMessageLoopRunning = false;
            scheduledHostCallback = null;
          } else {
            // If there's more work, schedule the next message event at the end
            // of the preceding one.
            port.postMessage(null);
          }
        } catch (error) {
          // If a scheduler task throws, exit the current browser task so the
          // error can be observed.
          port.postMessage(null);
          throw error;
        }
      } else {
        isMessageLoopRunning = false;
      } // Yielding to the browser will give it a chance to paint, so we can
      // reset this.


      needsPaint = false;
    } else {
      if (scheduledHostCallback !== null) {
        var _currentTime = exports.unstable_now();

        var _hasTimeRemaining = frameDeadline - _currentTime > 0;

        try {
          var _hasMoreWork = scheduledHostCallback(_hasTimeRemaining, _currentTime);

          if (!_hasMoreWork) {
            scheduledHostCallback = null;
          }
        } catch (error) {
          // If a scheduler task throws, exit the current browser task so the
          // error can be observed, and post a new task as soon as possible
          // so we can continue where we left off.
          port.postMessage(null);
          throw error;
        }
      } // Yielding to the browser will give it a chance to paint, so we can
      // reset this.


      needsPaint = false;
    }
  };

  var channel = new MessageChannel();
  var port = channel.port2;
  channel.port1.onmessage = performWorkUntilDeadline;

  var onAnimationFrame = function (rAFTime) {
    if (scheduledHostCallback === null) {
      // No scheduled work. Exit.
      prevRAFTime = -1;
      prevRAFInterval = -1;
      isRAFLoopRunning = false;
      return;
    } // Eagerly schedule the next animation callback at the beginning of the
    // frame. If the scheduler queue is not empty at the end of the frame, it
    // will continue flushing inside that callback. If the queue *is* empty,
    // then it will exit immediately. Posting the callback at the start of the
    // frame ensures it's fired within the earliest possible frame. If we
    // waited until the end of the frame to post the callback, we risk the
    // browser skipping a frame and not firing the callback until the frame
    // after that.


    isRAFLoopRunning = true;
    requestAnimationFrame(function (nextRAFTime) {
      _clearTimeout(rAFTimeoutID);

      onAnimationFrame(nextRAFTime);
    }); // requestAnimationFrame is throttled when the tab is backgrounded. We
    // don't want to stop working entirely. So we'll fallback to a timeout loop.
    // TODO: Need a better heuristic for backgrounded work.

    var onTimeout = function () {
      frameDeadline = exports.unstable_now() + frameLength / 2;
      performWorkUntilDeadline();
      rAFTimeoutID = _setTimeout(onTimeout, frameLength * 3);
    };

    rAFTimeoutID = _setTimeout(onTimeout, frameLength * 3);

    if (prevRAFTime !== -1 && // Make sure this rAF time is different from the previous one. This check
    // could fail if two rAFs fire in the same frame.
    rAFTime - prevRAFTime > 0.1) {
      var rAFInterval = rAFTime - prevRAFTime;

      if (!fpsLocked && prevRAFInterval !== -1) {
        // We've observed two consecutive frame intervals. We'll use this to
        // dynamically adjust the frame rate.
        //
        // If one frame goes long, then the next one can be short to catch up.
        // If two frames are short in a row, then that's an indication that we
        // actually have a higher frame rate than what we're currently
        // optimizing. For example, if we're running on 120hz display or 90hz VR
        // display. Take the max of the two in case one of them was an anomaly
        // due to missed frame deadlines.
        if (rAFInterval < frameLength && prevRAFInterval < frameLength) {
          frameLength = rAFInterval < prevRAFInterval ? prevRAFInterval : rAFInterval;

          if (frameLength < 8.33) {
            // Defensive coding. We don't support higher frame rates than 120hz.
            // If the calculated frame length gets lower than 8, it is probably
            // a bug.
            frameLength = 8.33;
          }
        }
      }

      prevRAFInterval = rAFInterval;
    }

    prevRAFTime = rAFTime;
    frameDeadline = rAFTime + frameLength; // We use the postMessage trick to defer idle work until after the repaint.

    port.postMessage(null);
  };

  requestHostCallback = function (callback) {
    scheduledHostCallback = callback;

    if (enableMessageLoopImplementation) {
      if (!isMessageLoopRunning) {
        isMessageLoopRunning = true;
        port.postMessage(null);
      }
    } else {
      if (!isRAFLoopRunning) {
        // Start a rAF loop.
        isRAFLoopRunning = true;
        requestAnimationFrame(function (rAFTime) {
          onAnimationFrame(rAFTime);
        });
      }
    }
  };

  requestHostTimeout = function (callback, ms) {
    taskTimeoutID = _setTimeout(function () {
      callback(exports.unstable_now());
    }, ms);
  };

  cancelHostTimeout = function () {
    _clearTimeout(taskTimeoutID);

    taskTimeoutID = -1;
  };
}

function push(heap, node) {
  var index = heap.length;
  heap.push(node);
  siftUp(heap, node, index);
}
function peek(heap) {
  var first = heap[0];
  return first === undefined ? null : first;
}
function pop(heap) {
  var first = heap[0];

  if (first !== undefined) {
    var last = heap.pop();

    if (last !== first) {
      heap[0] = last;
      siftDown(heap, last, 0);
    }

    return first;
  } else {
    return null;
  }
}

function siftUp(heap, node, i) {
  var index = i;

  while (true) {
    var parentIndex = Math.floor((index - 1) / 2);
    var parent = heap[parentIndex];

    if (parent !== undefined && compare(parent, node) > 0) {
      // The parent is larger. Swap positions.
      heap[parentIndex] = node;
      heap[index] = parent;
      index = parentIndex;
    } else {
      // The parent is smaller. Exit.
      return;
    }
  }
}

function siftDown(heap, node, i) {
  var index = i;
  var length = heap.length;

  while (index < length) {
    var leftIndex = (index + 1) * 2 - 1;
    var left = heap[leftIndex];
    var rightIndex = leftIndex + 1;
    var right = heap[rightIndex]; // If the left or right node is smaller, swap with the smaller of those.

    if (left !== undefined && compare(left, node) < 0) {
      if (right !== undefined && compare(right, left) < 0) {
        heap[index] = right;
        heap[rightIndex] = node;
        index = rightIndex;
      } else {
        heap[index] = left;
        heap[leftIndex] = node;
        index = leftIndex;
      }
    } else if (right !== undefined && compare(right, node) < 0) {
      heap[index] = right;
      heap[rightIndex] = node;
      index = rightIndex;
    } else {
      // Neither child is smaller. Exit.
      return;
    }
  }
}

function compare(a, b) {
  // Compare sort index first, then task id.
  var diff = a.sortIndex - b.sortIndex;
  return diff !== 0 ? diff : a.id - b.id;
}

// TODO: Use symbols?
var NoPriority = 0;
var ImmediatePriority = 1;
var UserBlockingPriority = 2;
var NormalPriority = 3;
var LowPriority = 4;
var IdlePriority = 5;

var runIdCounter = 0;
var mainThreadIdCounter = 0;
var profilingStateSize = 4;
var sharedProfilingBuffer = enableProfiling ? // $FlowFixMe Flow doesn't know about SharedArrayBuffer
typeof SharedArrayBuffer === 'function' ? new SharedArrayBuffer(profilingStateSize * Int32Array.BYTES_PER_ELEMENT) : // $FlowFixMe Flow doesn't know about ArrayBuffer
typeof ArrayBuffer === 'function' ? new ArrayBuffer(profilingStateSize * Int32Array.BYTES_PER_ELEMENT) : null // Don't crash the init path on IE9
: null;
var profilingState = enableProfiling && sharedProfilingBuffer !== null ? new Int32Array(sharedProfilingBuffer) : []; // We can't read this but it helps save bytes for null checks

var PRIORITY = 0;
var CURRENT_TASK_ID = 1;
var CURRENT_RUN_ID = 2;
var QUEUE_SIZE = 3;

if (enableProfiling) {
  profilingState[PRIORITY] = NoPriority; // This is maintained with a counter, because the size of the priority queue
  // array might include canceled tasks.

  profilingState[QUEUE_SIZE] = 0;
  profilingState[CURRENT_TASK_ID] = 0;
} // Bytes per element is 4


var INITIAL_EVENT_LOG_SIZE = 131072;
var MAX_EVENT_LOG_SIZE = 524288; // Equivalent to 2 megabytes

var eventLogSize = 0;
var eventLogBuffer = null;
var eventLog = null;
var eventLogIndex = 0;
var TaskStartEvent = 1;
var TaskCompleteEvent = 2;
var TaskErrorEvent = 3;
var TaskCancelEvent = 4;
var TaskRunEvent = 5;
var TaskYieldEvent = 6;
var SchedulerSuspendEvent = 7;
var SchedulerResumeEvent = 8;

function logEvent(entries) {
  if (eventLog !== null) {
    var offset = eventLogIndex;
    eventLogIndex += entries.length;

    if (eventLogIndex + 1 > eventLogSize) {
      eventLogSize *= 2;

      if (eventLogSize > MAX_EVENT_LOG_SIZE) {
        console.error("Scheduler Profiling: Event log exceeded maximum size. Don't " + 'forget to call `stopLoggingProfilingEvents()`.');
        stopLoggingProfilingEvents();
        return;
      }

      var newEventLog = new Int32Array(eventLogSize * 4);
      newEventLog.set(eventLog);
      eventLogBuffer = newEventLog.buffer;
      eventLog = newEventLog;
    }

    eventLog.set(entries, offset);
  }
}

function startLoggingProfilingEvents() {
  eventLogSize = INITIAL_EVENT_LOG_SIZE;
  eventLogBuffer = new ArrayBuffer(eventLogSize * 4);
  eventLog = new Int32Array(eventLogBuffer);
  eventLogIndex = 0;
}
function stopLoggingProfilingEvents() {
  var buffer = eventLogBuffer;
  eventLogSize = 0;
  eventLogBuffer = null;
  eventLog = null;
  eventLogIndex = 0;
  return buffer;
}
function markTaskStart(task, ms) {
  if (enableProfiling) {
    profilingState[QUEUE_SIZE]++;

    if (eventLog !== null) {
      // performance.now returns a float, representing milliseconds. When the
      // event is logged, it's coerced to an int. Convert to microseconds to
      // maintain extra degrees of precision.
      logEvent([TaskStartEvent, ms * 1000, task.id, task.priorityLevel]);
    }
  }
}
function markTaskCompleted(task, ms) {
  if (enableProfiling) {
    profilingState[PRIORITY] = NoPriority;
    profilingState[CURRENT_TASK_ID] = 0;
    profilingState[QUEUE_SIZE]--;

    if (eventLog !== null) {
      logEvent([TaskCompleteEvent, ms * 1000, task.id]);
    }
  }
}
function markTaskCanceled(task, ms) {
  if (enableProfiling) {
    profilingState[QUEUE_SIZE]--;

    if (eventLog !== null) {
      logEvent([TaskCancelEvent, ms * 1000, task.id]);
    }
  }
}
function markTaskErrored(task, ms) {
  if (enableProfiling) {
    profilingState[PRIORITY] = NoPriority;
    profilingState[CURRENT_TASK_ID] = 0;
    profilingState[QUEUE_SIZE]--;

    if (eventLog !== null) {
      logEvent([TaskErrorEvent, ms * 1000, task.id]);
    }
  }
}
function markTaskRun(task, ms) {
  if (enableProfiling) {
    runIdCounter++;
    profilingState[PRIORITY] = task.priorityLevel;
    profilingState[CURRENT_TASK_ID] = task.id;
    profilingState[CURRENT_RUN_ID] = runIdCounter;

    if (eventLog !== null) {
      logEvent([TaskRunEvent, ms * 1000, task.id, runIdCounter]);
    }
  }
}
function markTaskYield(task, ms) {
  if (enableProfiling) {
    profilingState[PRIORITY] = NoPriority;
    profilingState[CURRENT_TASK_ID] = 0;
    profilingState[CURRENT_RUN_ID] = 0;

    if (eventLog !== null) {
      logEvent([TaskYieldEvent, ms * 1000, task.id, runIdCounter]);
    }
  }
}
function markSchedulerSuspended(ms) {
  if (enableProfiling) {
    mainThreadIdCounter++;

    if (eventLog !== null) {
      logEvent([SchedulerSuspendEvent, ms * 1000, mainThreadIdCounter]);
    }
  }
}
function markSchedulerUnsuspended(ms) {
  if (enableProfiling) {
    if (eventLog !== null) {
      logEvent([SchedulerResumeEvent, ms * 1000, mainThreadIdCounter]);
    }
  }
}

/* eslint-disable no-var */
// Math.pow(2, 30) - 1
// 0b111111111111111111111111111111

var maxSigned31BitInt = 1073741823; // Times out immediately

var IMMEDIATE_PRIORITY_TIMEOUT = -1; // Eventually times out

var USER_BLOCKING_PRIORITY = 250;
var NORMAL_PRIORITY_TIMEOUT = 5000;
var LOW_PRIORITY_TIMEOUT = 10000; // Never times out

var IDLE_PRIORITY = maxSigned31BitInt; // Tasks are stored on a min heap

var taskQueue = [];
var timerQueue = []; // Incrementing id counter. Used to maintain insertion order.

var taskIdCounter = 1; // Pausing the scheduler is useful for debugging.

var isSchedulerPaused = false;
var currentTask = null;
var currentPriorityLevel = NormalPriority; // This is set while performing work, to prevent re-entrancy.

var isPerformingWork = false;
var isHostCallbackScheduled = false;
var isHostTimeoutScheduled = false;

function advanceTimers(currentTime) {
  // Check for tasks that are no longer delayed and add them to the queue.
  var timer = peek(timerQueue);

  while (timer !== null) {
    if (timer.callback === null) {
      // Timer was cancelled.
      pop(timerQueue);
    } else if (timer.startTime <= currentTime) {
      // Timer fired. Transfer to the task queue.
      pop(timerQueue);
      timer.sortIndex = timer.expirationTime;
      push(taskQueue, timer);

      if (enableProfiling) {
        markTaskStart(timer, currentTime);
        timer.isQueued = true;
      }
    } else {
      // Remaining timers are pending.
      return;
    }

    timer = peek(timerQueue);
  }
}

function handleTimeout(currentTime) {
  isHostTimeoutScheduled = false;
  advanceTimers(currentTime);

  if (!isHostCallbackScheduled) {
    if (peek(taskQueue) !== null) {
      isHostCallbackScheduled = true;
      requestHostCallback(flushWork);
    } else {
      var firstTimer = peek(timerQueue);

      if (firstTimer !== null) {
        requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime);
      }
    }
  }
}

function flushWork(hasTimeRemaining, initialTime) {
  if (enableProfiling) {
    markSchedulerUnsuspended(initialTime);
  } // We'll need a host callback the next time work is scheduled.


  isHostCallbackScheduled = false;

  if (isHostTimeoutScheduled) {
    // We scheduled a timeout but it's no longer needed. Cancel it.
    isHostTimeoutScheduled = false;
    cancelHostTimeout();
  }

  isPerformingWork = true;
  var previousPriorityLevel = currentPriorityLevel;

  try {
    if (enableProfiling) {
      try {
        return workLoop(hasTimeRemaining, initialTime);
      } catch (error) {
        if (currentTask !== null) {
          var currentTime = exports.unstable_now();
          markTaskErrored(currentTask, currentTime);
          currentTask.isQueued = false;
        }

        throw error;
      }
    } else {
      // No catch in prod codepath.
      return workLoop(hasTimeRemaining, initialTime);
    }
  } finally {
    currentTask = null;
    currentPriorityLevel = previousPriorityLevel;
    isPerformingWork = false;

    if (enableProfiling) {
      var _currentTime = exports.unstable_now();

      markSchedulerSuspended(_currentTime);
    }
  }
}

function workLoop(hasTimeRemaining, initialTime) {
  var currentTime = initialTime;
  advanceTimers(currentTime);
  currentTask = peek(taskQueue);

  while (currentTask !== null && !(enableSchedulerDebugging && isSchedulerPaused)) {
    if (currentTask.expirationTime > currentTime && (!hasTimeRemaining || shouldYieldToHost())) {
      // This currentTask hasn't expired, and we've reached the deadline.
      break;
    }

    var callback = currentTask.callback;

    if (callback !== null) {
      currentTask.callback = null;
      currentPriorityLevel = currentTask.priorityLevel;
      var didUserCallbackTimeout = currentTask.expirationTime <= currentTime;
      markTaskRun(currentTask, currentTime);
      var continuationCallback = callback(didUserCallbackTimeout);
      currentTime = exports.unstable_now();

      if (typeof continuationCallback === 'function') {
        currentTask.callback = continuationCallback;
        markTaskYield(currentTask, currentTime);
      } else {
        if (enableProfiling) {
          markTaskCompleted(currentTask, currentTime);
          currentTask.isQueued = false;
        }

        if (currentTask === peek(taskQueue)) {
          pop(taskQueue);
        }
      }

      advanceTimers(currentTime);
    } else {
      pop(taskQueue);
    }

    currentTask = peek(taskQueue);
  } // Return whether there's additional work


  if (currentTask !== null) {
    return true;
  } else {
    var firstTimer = peek(timerQueue);

    if (firstTimer !== null) {
      requestHostTimeout(handleTimeout, firstTimer.startTime - currentTime);
    }

    return false;
  }
}

function unstable_runWithPriority(priorityLevel, eventHandler) {
  switch (priorityLevel) {
    case ImmediatePriority:
    case UserBlockingPriority:
    case NormalPriority:
    case LowPriority:
    case IdlePriority:
      break;

    default:
      priorityLevel = NormalPriority;
  }

  var previousPriorityLevel = currentPriorityLevel;
  currentPriorityLevel = priorityLevel;

  try {
    return eventHandler();
  } finally {
    currentPriorityLevel = previousPriorityLevel;
  }
}

function unstable_next(eventHandler) {
  var priorityLevel;

  switch (currentPriorityLevel) {
    case ImmediatePriority:
    case UserBlockingPriority:
    case NormalPriority:
      // Shift down to normal priority
      priorityLevel = NormalPriority;
      break;

    default:
      // Anything lower than normal priority should remain at the current level.
      priorityLevel = currentPriorityLevel;
      break;
  }

  var previousPriorityLevel = currentPriorityLevel;
  currentPriorityLevel = priorityLevel;

  try {
    return eventHandler();
  } finally {
    currentPriorityLevel = previousPriorityLevel;
  }
}

function unstable_wrapCallback(callback) {
  var parentPriorityLevel = currentPriorityLevel;
  return function () {
    // This is a fork of runWithPriority, inlined for performance.
    var previousPriorityLevel = currentPriorityLevel;
    currentPriorityLevel = parentPriorityLevel;

    try {
      return callback.apply(this, arguments);
    } finally {
      currentPriorityLevel = previousPriorityLevel;
    }
  };
}

function timeoutForPriorityLevel(priorityLevel) {
  switch (priorityLevel) {
    case ImmediatePriority:
      return IMMEDIATE_PRIORITY_TIMEOUT;

    case UserBlockingPriority:
      return USER_BLOCKING_PRIORITY;

    case IdlePriority:
      return IDLE_PRIORITY;

    case LowPriority:
      return LOW_PRIORITY_TIMEOUT;

    case NormalPriority:
    default:
      return NORMAL_PRIORITY_TIMEOUT;
  }
}

function unstable_scheduleCallback(priorityLevel, callback, options) {
  var currentTime = exports.unstable_now();
  var startTime;
  var timeout;

  if (typeof options === 'object' && options !== null) {
    var delay = options.delay;

    if (typeof delay === 'number' && delay > 0) {
      startTime = currentTime + delay;
    } else {
      startTime = currentTime;
    }

    timeout = typeof options.timeout === 'number' ? options.timeout : timeoutForPriorityLevel(priorityLevel);
  } else {
    timeout = timeoutForPriorityLevel(priorityLevel);
    startTime = currentTime;
  }

  var expirationTime = startTime + timeout;
  var newTask = {
    id: taskIdCounter++,
    callback: callback,
    priorityLevel: priorityLevel,
    startTime: startTime,
    expirationTime: expirationTime,
    sortIndex: -1
  };

  if (enableProfiling) {
    newTask.isQueued = false;
  }

  if (startTime > currentTime) {
    // This is a delayed task.
    newTask.sortIndex = startTime;
    push(timerQueue, newTask);

    if (peek(taskQueue) === null && newTask === peek(timerQueue)) {
      // All tasks are delayed, and this is the task with the earliest delay.
      if (isHostTimeoutScheduled) {
        // Cancel an existing timeout.
        cancelHostTimeout();
      } else {
        isHostTimeoutScheduled = true;
      } // Schedule a timeout.


      requestHostTimeout(handleTimeout, startTime - currentTime);
    }
  } else {
    newTask.sortIndex = expirationTime;
    push(taskQueue, newTask);

    if (enableProfiling) {
      markTaskStart(newTask, currentTime);
      newTask.isQueued = true;
    } // Schedule a host callback, if needed. If we're already performing work,
    // wait until the next time we yield.


    if (!isHostCallbackScheduled && !isPerformingWork) {
      isHostCallbackScheduled = true;
      requestHostCallback(flushWork);
    }
  }

  return newTask;
}

function unstable_pauseExecution() {
  isSchedulerPaused = true;
}

function unstable_continueExecution() {
  isSchedulerPaused = false;

  if (!isHostCallbackScheduled && !isPerformingWork) {
    isHostCallbackScheduled = true;
    requestHostCallback(flushWork);
  }
}

function unstable_getFirstCallbackNode() {
  return peek(taskQueue);
}

function unstable_cancelCallback(task) {
  if (enableProfiling) {
    if (task.isQueued) {
      var currentTime = exports.unstable_now();
      markTaskCanceled(task, currentTime);
      task.isQueued = false;
    }
  } // Null out the callback to indicate the task has been canceled. (Can't
  // remove from the queue because you can't remove arbitrary nodes from an
  // array based heap, only the first one.)


  task.callback = null;
}

function unstable_getCurrentPriorityLevel() {
  return currentPriorityLevel;
}

function unstable_shouldYield() {
  var currentTime = exports.unstable_now();
  advanceTimers(currentTime);
  var firstTask = peek(taskQueue);
  return firstTask !== currentTask && currentTask !== null && firstTask !== null && firstTask.callback !== null && firstTask.startTime <= currentTime && firstTask.expirationTime < currentTask.expirationTime || shouldYieldToHost();
}

var unstable_requestPaint = requestPaint;
var unstable_Profiling = enableProfiling ? {
  startLoggingProfilingEvents: startLoggingProfilingEvents,
  stopLoggingProfilingEvents: stopLoggingProfilingEvents,
  sharedProfilingBuffer: sharedProfilingBuffer
} : null;

exports.unstable_ImmediatePriority = ImmediatePriority;
exports.unstable_UserBlockingPriority = UserBlockingPriority;
exports.unstable_NormalPriority = NormalPriority;
exports.unstable_IdlePriority = IdlePriority;
exports.unstable_LowPriority = LowPriority;
exports.unstable_runWithPriority = unstable_runWithPriority;
exports.unstable_next = unstable_next;
exports.unstable_scheduleCallback = unstable_scheduleCallback;
exports.unstable_cancelCallback = unstable_cancelCallback;
exports.unstable_wrapCallback = unstable_wrapCallback;
exports.unstable_getCurrentPriorityLevel = unstable_getCurrentPriorityLevel;
exports.unstable_shouldYield = unstable_shouldYield;
exports.unstable_requestPaint = unstable_requestPaint;
exports.unstable_continueExecution = unstable_continueExecution;
exports.unstable_pauseExecution = unstable_pauseExecution;
exports.unstable_getFirstCallbackNode = unstable_getFirstCallbackNode;
exports.unstable_Profiling = unstable_Profiling;
  })();
}

}).call(this,require('_process'))
},{"_process":11}],39:[function(require,module,exports){
/** @license React v0.17.0
 * scheduler.production.min.js
 *
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

'use strict';Object.defineProperty(exports,"__esModule",{value:!0});var f,g,h,k,l;
if("undefined"===typeof window||"function"!==typeof MessageChannel){var p=null,q=null,t=function(){if(null!==p)try{var a=exports.unstable_now();p(!0,a);p=null}catch(b){throw setTimeout(t,0),b;}},u=Date.now();exports.unstable_now=function(){return Date.now()-u};f=function(a){null!==p?setTimeout(f,0,a):(p=a,setTimeout(t,0))};g=function(a,b){q=setTimeout(a,b)};h=function(){clearTimeout(q)};k=function(){return!1};l=exports.unstable_forceFrameRate=function(){}}else{var w=window.performance,x=window.Date,
y=window.setTimeout,z=window.clearTimeout,A=window.requestAnimationFrame,B=window.cancelAnimationFrame;"undefined"!==typeof console&&("function"!==typeof A&&console.error("This browser doesn't support requestAnimationFrame. Make sure that you load a polyfill in older browsers. https://fb.me/react-polyfills"),"function"!==typeof B&&console.error("This browser doesn't support cancelAnimationFrame. Make sure that you load a polyfill in older browsers. https://fb.me/react-polyfills"));if("object"===typeof w&&
"function"===typeof w.now)exports.unstable_now=function(){return w.now()};else{var C=x.now();exports.unstable_now=function(){return x.now()-C}}var D=!1,E=null,F=-1,G=5,H=0;k=function(){return exports.unstable_now()>=H};l=function(){};exports.unstable_forceFrameRate=function(a){0>a||125<a?console.error("forceFrameRate takes a positive int between 0 and 125, forcing framerates higher than 125 fps is not unsupported"):G=0<a?Math.floor(1E3/a):33.33};var I=new MessageChannel,J=I.port2;I.port1.onmessage=
function(){if(null!==E){var a=exports.unstable_now();H=a+G;try{E(!0,a)?J.postMessage(null):(D=!1,E=null)}catch(b){throw J.postMessage(null),b;}}else D=!1};f=function(a){E=a;D||(D=!0,J.postMessage(null))};g=function(a,b){F=y(function(){a(exports.unstable_now())},b)};h=function(){z(F);F=-1}}function K(a,b){var c=a.length;a.push(b);a:for(;;){var d=Math.floor((c-1)/2),e=a[d];if(void 0!==e&&0<L(e,b))a[d]=b,a[c]=e,c=d;else break a}}function M(a){a=a[0];return void 0===a?null:a}
function N(a){var b=a[0];if(void 0!==b){var c=a.pop();if(c!==b){a[0]=c;a:for(var d=0,e=a.length;d<e;){var m=2*(d+1)-1,n=a[m],v=m+1,r=a[v];if(void 0!==n&&0>L(n,c))void 0!==r&&0>L(r,n)?(a[d]=r,a[v]=c,d=v):(a[d]=n,a[m]=c,d=m);else if(void 0!==r&&0>L(r,c))a[d]=r,a[v]=c,d=v;else break a}}return b}return null}function L(a,b){var c=a.sortIndex-b.sortIndex;return 0!==c?c:a.id-b.id}var O=[],P=[],Q=1,R=null,S=3,T=!1,U=!1,V=!1;
function W(a){for(var b=M(P);null!==b;){if(null===b.callback)N(P);else if(b.startTime<=a)N(P),b.sortIndex=b.expirationTime,K(O,b);else break;b=M(P)}}function X(a){V=!1;W(a);if(!U)if(null!==M(O))U=!0,f(Y);else{var b=M(P);null!==b&&g(X,b.startTime-a)}}
function Y(a,b){U=!1;V&&(V=!1,h());T=!0;var c=S;try{W(b);for(R=M(O);null!==R&&(!(R.expirationTime>b)||a&&!k());){var d=R.callback;if(null!==d){R.callback=null;S=R.priorityLevel;var e=d(R.expirationTime<=b);b=exports.unstable_now();"function"===typeof e?R.callback=e:R===M(O)&&N(O);W(b)}else N(O);R=M(O)}if(null!==R)var m=!0;else{var n=M(P);null!==n&&g(X,n.startTime-b);m=!1}return m}finally{R=null,S=c,T=!1}}
function Z(a){switch(a){case 1:return-1;case 2:return 250;case 5:return 1073741823;case 4:return 1E4;default:return 5E3}}var aa=l;exports.unstable_ImmediatePriority=1;exports.unstable_UserBlockingPriority=2;exports.unstable_NormalPriority=3;exports.unstable_IdlePriority=5;exports.unstable_LowPriority=4;exports.unstable_runWithPriority=function(a,b){switch(a){case 1:case 2:case 3:case 4:case 5:break;default:a=3}var c=S;S=a;try{return b()}finally{S=c}};
exports.unstable_next=function(a){switch(S){case 1:case 2:case 3:var b=3;break;default:b=S}var c=S;S=b;try{return a()}finally{S=c}};
exports.unstable_scheduleCallback=function(a,b,c){var d=exports.unstable_now();if("object"===typeof c&&null!==c){var e=c.delay;e="number"===typeof e&&0<e?d+e:d;c="number"===typeof c.timeout?c.timeout:Z(a)}else c=Z(a),e=d;c=e+c;a={id:Q++,callback:b,priorityLevel:a,startTime:e,expirationTime:c,sortIndex:-1};e>d?(a.sortIndex=e,K(P,a),null===M(O)&&a===M(P)&&(V?h():V=!0,g(X,e-d))):(a.sortIndex=c,K(O,a),U||T||(U=!0,f(Y)));return a};exports.unstable_cancelCallback=function(a){a.callback=null};
exports.unstable_wrapCallback=function(a){var b=S;return function(){var c=S;S=b;try{return a.apply(this,arguments)}finally{S=c}}};exports.unstable_getCurrentPriorityLevel=function(){return S};exports.unstable_shouldYield=function(){var a=exports.unstable_now();W(a);var b=M(O);return b!==R&&null!==R&&null!==b&&null!==b.callback&&b.startTime<=a&&b.expirationTime<R.expirationTime||k()};exports.unstable_requestPaint=aa;exports.unstable_continueExecution=function(){U||T||(U=!0,f(Y))};
exports.unstable_pauseExecution=function(){};exports.unstable_getFirstCallbackNode=function(){return M(O)};exports.unstable_Profiling=null;

},{}],40:[function(require,module,exports){
(function (process){
'use strict';

if (process.env.NODE_ENV === 'production') {
  module.exports = require('./cjs/scheduler.production.min.js');
} else {
  module.exports = require('./cjs/scheduler.development.js');
}

}).call(this,require('_process'))
},{"./cjs/scheduler.development.js":38,"./cjs/scheduler.production.min.js":39,"_process":11}],41:[function(require,module,exports){
(function (process){
'use strict';

if (process.env.NODE_ENV === 'production') {
  module.exports = require('./cjs/scheduler-tracing.production.min.js');
} else {
  module.exports = require('./cjs/scheduler-tracing.development.js');
}

}).call(this,require('_process'))
},{"./cjs/scheduler-tracing.development.js":36,"./cjs/scheduler-tracing.production.min.js":37,"_process":11}],42:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _jqueryfade = require("./jqueryfade.jsx");

var _jqueryfade2 = _interopRequireDefault(_jqueryfade);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

var _reactTransitionGroup = require("react-transition-group");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var AlertPane = (0, _createReactClass2.default)({
  displayName: "AlertPane",

  //fixme! - class AlertPane extends React.Component {
  propTypes: {
    alerts: PT.array.isRequired
  },

  renderAlertMessage: function renderAlertMessage(alert, index) {
    return alert ? React.createElement(
      _reactTransitionGroup.CSSTransition,
      { key: alert.type + "-" + index, classNames: "fade", timeout: { enter: 200, exit: 200 } },
      React.createElement(
        "div",
        { key: alert.type + "-" + index, className: "info" === alert.type ? "infoMessage" : "errorMessage" },
        alert.msg
      )
    ) : false;
  },

  render: function render() {
    return React.createElement(
      "div",
      { className: "container alertDiv" },
      React.createElement(
        "div",
        { className: "row alertRow" },
        React.createElement(
          _reactTransitionGroup.TransitionGroup,
          { component: "div" },
          this.props.alerts.map(this.renderAlertMessage)
        )
      )
    );
  }
});

module.exports = AlertPane;

},{"./jqueryfade.jsx":46,"classnames":2,"create-react-class":6,"prop-types":15,"react-transition-group":30}],43:[function(require,module,exports){

},{}],44:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var EmbeddedFooter = (0, _createReactClass2.default)({
  displayName: "EmbeddedFooter",

  //fixme! - class EmbeddedFooter extends React.Component { 
  propTypes: {
    URLROOT: PT.string.isRequired
  },

  render: function render() {
    return React.createElement(
      "div",
      { className: "container", style: { textAlign: 'center' } },
      React.createElement(
        "div",
        { className: "row" },
        React.createElement(
          "div",
          { style: { position: 'relative', float: 'right' } },
          React.createElement(
            "div",
            { className: "rightist", style: { position: 'absolute', right: 0, width: 170 } },
            React.createElement(
              "a",
              { href: this.props.URLROOT + "/", target: "_blank", tabIndex: "-1" },
              React.createElement("img", { width: "28px", height: "28px", src: "img/magglass1.png" }),
              React.createElement(
                "header",
                { className: "inline float-left" },
                " Content Search "
              )
            )
          )
        )
      )
    );
  }
});

module.exports = EmbeddedFooter;

},{"classnames":2,"create-react-class":6,"prop-types":15}],45:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var Footer = (0, _createReactClass2.default)({
  displayName: "Footer",

  //fixme! - class Footer extends React.Component {
  propTypes: {
    VERSION: PT.string.isRequired,
    toAbout: PT.func.isRequired
  },

  toAbout: function toAbout(e) {
    this.props.toAbout(true);
    e.preventDefault();
    e.stopPropagation();
  },

  render: function render() {
    return React.createElement(
      "div",
      { className: "container", style: { textAlign: 'center' } },
      React.createElement(
        "div",
        { className: "row" },
        React.createElement(
          "div",
          { style: { position: 'relative', float: 'left' } },
          React.createElement(
            "div",
            { className: "leftist", style: { position: 'absolute' } },
            React.createElement(
              "div",
              null,
              React.createElement(
                "a",
                { title: "about", href: "about", onClick: this.toAbout },
                "About"
              )
            ),
            React.createElement(
              "div",
              { style: { color: '#777' } },
              this.props.VERSION
            )
          )
        ),
        React.createElement(
          "a",
          { title: "CLARIN ERIC", href: "https://www.clarin.eu/" },
          React.createElement("img", { src: "img/clarindLogo.png", alt: "CLARIN ERIC logo", style: { height: 60 } })
        ),
        React.createElement(
          "div",
          { style: { position: 'relative', float: 'right' } },
          React.createElement(
            "div",
            { className: "rightist", style: { position: 'absolute', right: '0' } },
            React.createElement(
              "a",
              { title: "contact", href: "mailto:fcs@clarin.eu" },
              "Contact"
            )
          )
        )
      )
    );
  }
});

module.exports = Footer;

},{"classnames":2,"create-react-class":6,"prop-types":15}],46:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var JQueryFade = (0, _createReactClass2.default)({
  displayName: "JQueryFade",

  //fixme! - class JQueryFade extends React.Component {
  componentWillEnter: function componentWillEnter(callback) {
    var el = jQuery(ReactDOM.findDOMNode(this));
    el.css("display", "none");
    el.fadeIn(500, callback);
  },
  componentWillLeave: function componentWillLeave(callback) {
    jQuery(ReactDOM.findDOMNode(this)).fadeOut(500, callback);
  },
  render: function render() {
    return this.props.children;
  }
});

module.exports = JQueryFade;

},{"classnames":2,"create-react-class":6,"prop-types":15}],47:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var LanguageSelector = (0, _createReactClass2.default)({
  displayName: "LanguageSelector",

  propTypes: {
    anyLanguage: PT.array.isRequired,
    languageMap: PT.object.isRequired,
    selectedLanguage: PT.array.isRequired,
    languageFilter: PT.string.isRequired,
    languageChangeHandler: PT.func.isRequired
  },

  selectLang: function selectLang(language) {
    this.props.languageChangeHandler(language, this.props.languageFilter);
  },

  setFilter: function setFilter(filter) {
    this.props.languageChangeHandler(this.props.selectedLanguage, filter);
  },

  renderLanguageObject: function renderLanguageObject(lang) {
    var desc = lang[1] + " [" + lang[0] + "]";
    var style = {
      whiteSpace: "nowrap",
      fontWeight: lang[0] === this.props.selectedLanguage[0] ? "bold" : "normal"
    };
    return React.createElement(
      "div",
      { key: lang[0] },
      React.createElement(
        "a",
        { tabIndex: "-1", href: "#", style: style, onClick: this.selectLang.bind(this, lang) },
        desc
      )
    );
  },

  renderRadio: function renderRadio(option) {
    return this.props.languageFilter === option ? React.createElement("input", { type: "radio", name: "filterOpts", value: option, checked: true, onChange: this.setFilter.bind(this, option) }) : React.createElement("input", { type: "radio", name: "filterOpts", value: option, onChange: this.setFilter.bind(this, option) });
  },

  render: function render() {
    var languages = _.pairs(this.props.languageMap).sort(function (l1, l2) {
      return l1[1].localeCompare(l2[1]);
    });
    languages.unshift(this.props.anyLanguage);
    languages = languages.map(this.renderLanguageObject);
    var third = Math.round(languages.length / 3);
    var l1 = languages.slice(0, third);
    var l2 = languages.slice(third, 2 * third);
    var l3 = languages.slice(2 * third, languages.length);

    return React.createElement(
      "div",
      null,
      React.createElement(
        "div",
        { className: "row" },
        React.createElement(
          "div",
          { className: "col-sm-4" },
          l1
        ),
        React.createElement(
          "div",
          { className: "col-sm-4" },
          l2
        ),
        React.createElement(
          "div",
          { className: "col-sm-4" },
          l3
        ),
        React.createElement("div", { className: "col-sm-12", style: { marginTop: 10, marginBottom: 10, borderBottom: "1px solid #eee" } })
      ),
      React.createElement(
        "form",
        { className: "form", role: "form" },
        React.createElement(
          "div",
          { className: "input-group" },
          React.createElement(
            "div",
            null,
            React.createElement(
              "label",
              { style: { color: 'black' } },
              this.renderRadio('byMeta'),
              " ",
              "Use the resources",
              "'",
              " specified language to filter results"
            )
          ),
          React.createElement(
            "div",
            null,
            React.createElement(
              "label",
              { style: { color: 'black' } },
              this.renderRadio('byGuess'),
              " ",
              "Filter results by using a language detector"
            )
          ),
          React.createElement(
            "div",
            null,
            React.createElement(
              "label",
              { style: { color: 'black' } },
              this.renderRadio('byMetaAndGuess'),
              " ",
              "First use the resources",
              "'",
              " specified language then also use a language detector"
            )
          )
        )
      )
    );
  }
});

module.exports = LanguageSelector;

},{"classnames":2,"create-react-class":6,"prop-types":15}],48:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var Modal = (0, _createReactClass2.default)({
  displayName: "Modal",

  //fixme! - class Modal extends React.Component {
  propTypes: {
    title: PT.object.isRequired
  },
  componentDidMount: function componentDidMount() {
    $(ReactDOM.findDOMNode(this)).modal({ background: true, keyboard: true, show: false });
  },
  componentWillUnmount: function componentWillUnmount() {
    $(ReactDOM.findDOMNode(this)).off('hidden');
  },
  handleClick: function handleClick(e) {
    e.stopPropagation();
  },
  render: function render() {
    return React.createElement(
      "div",
      { onClick: this.handleClick, className: "modal fade", role: "dialog", "aria-hidden": "true" },
      React.createElement(
        "div",
        { className: "modal-dialog" },
        React.createElement(
          "div",
          { className: "modal-content" },
          React.createElement(
            "div",
            { className: "modal-header" },
            React.createElement(
              "button",
              { type: "button", className: "close", "data-dismiss": "modal" },
              React.createElement(
                "span",
                { "aria-hidden": "true" },
                "\xD7"
              ),
              React.createElement(
                "span",
                { className: "sr-only" },
                "Close"
              )
            ),
            React.createElement(
              "h2",
              { className: "modal-title" },
              this.props.title
            )
          ),
          React.createElement(
            "div",
            { className: "modal-body" },
            this.props.children
          ),
          React.createElement(
            "div",
            { className: "modal-footer" },
            React.createElement(
              "button",
              { type: "button", className: "btn btn-default", "data-dismiss": "modal" },
              "Close"
            )
          )
        )
      )
    );
  }
});

module.exports = Modal;

},{"classnames":2,"create-react-class":6,"prop-types":15}],49:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var Panel = (0, _createReactClass2.default)({
  displayName: "Panel",

  //fixme! - class Panel extends React.Component {
  propTypes: {
    title: PT.object.isRequired,
    info: PT.object.isRequired
  },

  getInitialState: function getInitialState() {
    return {
      open: true
    };
  },

  toggleState: function toggleState(e) {
    this.setState({ open: !this.state.open });
  },

  render: function render() {
    var chevron = "glyphicon glyphicon-chevron-" + (this.state.open ? "down" : "right");
    return React.createElement(
      "div",
      { className: "bs-callout bs-callout-info" },
      React.createElement(
        "div",
        { className: "panel" },
        React.createElement(
          "div",
          { className: "panel-heading unselectable row", onClick: this.toggleState },
          React.createElement(
            "div",
            { className: "panel-title unselectable col-sm-11" },
            React.createElement("span", { className: chevron, style: { fontSize: 12 } }),
            "\xA0",
            this.props.title
          ),
          React.createElement(
            "div",
            { className: "float-right" },
            this.props.info
          )
        ),
        this.state.open ? React.createElement(
          "div",
          { className: "panel-body" },
          this.props.children
        ) : false
      )
    );
  }
});

module.exports = Panel;

},{"classnames":2,"create-react-class":6,"prop-types":15}],50:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

var _reactAddonsPureRenderMixin = require("react-addons-pure-render-mixin");

var _reactAddonsPureRenderMixin2 = _interopRequireDefault(_reactAddonsPureRenderMixin);

var _reactTransitionGroup = require("react-transition-group");

var _reactCodemirror = require("react-codemirror2");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

require('./codemirror/mode/fcs-ql/fcs-ql');
require('codemirror/mode/javascript/javascript');

var PT = _propTypes2.default;

function nextId() {
  return nextId.id++;
}
nextId.id = 0;

var QueryInput = (0, _createReactClass2.default)({
  displayName: "QueryInput",

  //fixme! - class QueryInput extends React.Component {
  propTypes: {
    searchedLanguage: PT.array,
    queryTypeId: PT.string.isRequired,
    query: PT.string,
    embedded: PT.bool.isRequired,
    placeholder: PT.string,
    onQueryChange: PT.func.isRequired,
    onKeyDown: PT.func.isRequired
  },

  render: function render() {
    var _this = this;

    if (this.props.queryTypeId == "cql") {
      return React.createElement("input", { className: "form-control input-lg search",
        id: "query-cql", name: "query-cql", type: "text",
        value: this.props.query, placeholder: this.props.placeholder,
        tabIndex: "1", onChange: function onChange(evt) {
          return _this.props.onQueryChange(evt.target.value);
        }
        //onQuery={this.props.onQuery}
        , onKeyDown: this.props.onKeyDown,
        ref: "cqlOrEmbeddedQuery" })
      /*
      //		     <CodeMirror
      //		         value={this.props.placeholder || this.props.query}
      //		         options={{
      //		             mode: 'fcs-ql',
      //		             theme: 'default',
      //		             lineNumbers: false,
      //		             matchBrackets: true,
      //		             viewportMargin: 1
      //		         }}
      //		         className="form-control input-lg search"
      //		         onBeforeChange={(editor, data, value) => {
      //		             this.setState({value});
      //		         }}
      //		         onChange={(editor, data, value) => {
      //		             this.props.onChange(value);
      //		         }}
      //		         onQuery={this.props.onQuery}
      //		         onKeyDown={(editor, event) => {
      //		             this.props.onKeyDown(editor, event)
      //		         }}
      //		         ref="cqlOrEmbeddedQuery"
      //		         >
      //		      </CodeMirror>
      */
      ;
    } else if (this.props.embedded && this.props.queryTypeId == "fcs") {
      return React.createElement("textarea", { className: "form-control input-lg search",
        id: "query-fcs", name: "query-fcs",
        type: "text", rows: "1",
        value: this.props.query, placeholder: this.props.placeholder,
        tabIndex: "1", onChange: function onChange(evt) {
          return _this.props.onQueryChange(evt.target.value);
        }
        //onQuery={this.props.onQuery}
        , onKeyDown: this.props.onKeyDown,
        ref: "fcsOrEmbeddedQuery" });
    }
    return React.createElement(
      "div",
      { id: "adv_query_input_group" },
      React.createElement(ADVTokens, {
        query: this.props.query,
        ref: "fcsGQB",
        onQueryChange: this.props.onQueryChange
      })
    );
  }
});

var ADVTokens = (0, _createReactClass2.default)({
  displayName: "ADVTokens",


  propTypes: {
    query: PT.string, // initial state query. If you want to set a new one, change the 'key' prop on ADVTokens.
    onQueryChange: PT.func.isRequired
  },

  getDefaultProps: function getDefaultProps() {
    return {
      query: '[ word = "Elefant" ]'
    };
  },


  getInitialState: function getInitialState() {
    var _this2 = this;

    this.queryStrCache = {};

    console.log('ADVTokens:', this.props.query);

    var match = queryToTokens(this.props.query);
    console.log('ADVTokens 2:', match);
    if (match === null) {
      return { tokens: ['token-' + nextId()] };
    }

    var tokens = [];
    match.forEach(function (m) {
      var id = 'token-' + nextId();
      tokens.push(id);
      _this2.queryStrCache[id] = m;
    });

    return { tokens: tokens };
  },

  addADVToken: function addADVToken() {
    this.setState(function (oldSt) {
      oldSt.tokens.push('token-' + nextId());
      return { tokens: oldSt.tokens };
    });
  },

  removeADVToken: function removeADVToken(id) {
    var _this3 = this;

    this.setState(function (oldSt) {
      delete _this3.queryStrCache[id];
      oldSt.tokens.splice(oldSt.tokens.indexOf(id), 1);
      return { tokens: oldSt.tokens };
    }, this.fireQueryChange);
  },

  fireQueryChange: function fireQueryChange() {
    var _this4 = this;

    var tokenParts = this.state.tokens.map(function (id) {
      return _this4.queryStrCache[id];
    });
    var queryString = tokenParts.join(' ');
    this.props.onQueryChange(queryString);
  },
  onQueryChange: function onQueryChange(tokenId, queryStr) {
    this.queryStrCache[tokenId] = queryStr;
    this.fireQueryChange();
  },


  render: function render() {
    var _this5 = this;

    var i = 0;
    var tokens = this.state.tokens.map(function (tokenId, i) {
      return React.createElement(
        _reactTransitionGroup.CSSTransition,
        { key: tokenId, classNames: "token", timeout: { enter: 250, exit: 250 } },
        React.createElement(ADVToken, {
          query: _this5.queryStrCache[tokenId],
          onQueryChange: function onQueryChange(qs) {
            return _this5.onQueryChange(tokenId, qs);
          },
          handleRemoveADVToken: function handleRemoveADVToken() {
            return _this5.removeADVToken(tokenId);
          } })
      );
    });

    return React.createElement(
      "div",
      { id: "adv-tokens" },
      React.createElement(
        _reactTransitionGroup.TransitionGroup,
        null,
        tokens
      ),
      React.createElement(
        "button",
        { className: "btn btn-xs btn-default image_button insert_token", type: "button", onClick: this.addADVToken },
        React.createElement("i", { className: "glyphicon glyphicon-plus" })
      )
    );
  }
});

var ADVToken = (0, _createReactClass2.default)({
  displayName: "ADVToken",

  propTypes: {
    query: PT.string,
    onQueryChange: PT.func.isRequired,
    handleRemoveADVToken: PT.func.isRequired
  },

  render: function render() {
    return React.createElement(
      "div",
      { className: "token query_token inline btn-group", style: { display: "inline-block" } },
      React.createElement(
        "div",
        { className: "token_header" },
        React.createElement(
          "span",
          { className: "image_button close_btn", type: "button", onClick: this.props.handleRemoveADVToken, ref: "removeToken" },
          React.createElement("i", { className: "glyphicon glyphicon-remove-circle" })
        ),
        React.createElement("div", { style: { clear: "both" } })
      ),
      React.createElement(
        "div",
        { className: "args" },
        React.createElement(ANDQueryArgs, { onQueryChange: this.props.onQueryChange, query: this.props.query }),
        React.createElement("div", { className: "lower_footer" })
      )
    );
  }
});

var ADVTokenMenu = (0, _createReactClass2.default)({
  displayName: "ADVTokenMenu",

  mixins: [_reactAddonsPureRenderMixin2.default],

  propTypes: {
    onChange: PT.func.isRequired,
    repeat1: PT.string,
    repeat2: PT.string
  },

  getInitialState: function getInitialState() {
    var repeat1 = this.props.repeat1 || '';
    var repeat2 = this.props.repeat2 || '';
    return {
      repeat1: repeat1,
      repeat2: repeat2,
      hideMenu: repeat1 || repeat2 ? false : true,
      isStart: false,
      isEnd: false
    };
  },

  getMenuState: function getMenuState() {
    if (this.state.hideMenu) {
      return {};
    } else {
      return $.extend({}, this.state); // copy of state
    }
  },


  toggleRepeatMenu: function toggleRepeatMenu(e) {
    this.setState(function (st) {
      return { hideMenu: !st.hideMenu };
    });
  },
  toggleStart: function toggleStart(e) {
    this.setState(function (st) {
      return { isStart: !st.isStart };
    });
  },
  toggleEnd: function toggleEnd(e) {
    this.setState(function (st) {
      return { isEnd: !st.isEnd };
    });
  },
  componentDidMount: function componentDidMount() {
    // make this compoent controlled too so that this awkward ref.getMenuState() stuff can be removed
    this.props.onChange(this.getMenuState());
  },
  componentDidUpdate: function componentDidUpdate() {
    // safe because of pure-render-mixin: will only update on state change.
    this.props.onChange(this.getMenuState());
  },


  render: function render() {
    var _this6 = this;

    return React.createElement(
      "div",
      { id: "ADVtokenMenu" },
      React.createElement(
        "button",
        { className: "btn btn-xs btn-default image_button repeat_menu", onClick: this.toggleRepeatMenu, ref: "repeatMenu" },
        React.createElement("i", { className: "fa fa-cog" })
      ),
      React.createElement(
        "div",
        { id: "ADVtokenMenu-items", className: "hide-" + this.state.hideMenu },
        React.createElement(
          "div",
          { id: "repeatMenu", className: "repeat" },
          React.createElement(
            "span",
            null,
            "Repeat"
          ),
          React.createElement("input", { type: "text", id: "repeat1", value: this.state.repeat1, onChange: function onChange(evt) {
              return _this6.setState({ repeat1: evt.target.value });
            }, ref: "repeat1" }),
          React.createElement(
            "span",
            null,
            "to"
          ),
          React.createElement("input", { type: "text", id: "repeat2", value: this.state.repeat2, onChange: function onChange(evt) {
              return _this6.setState({ repeat2: evt.target.value });
            }, ref: "repeat2" }),
          React.createElement(
            "span",
            null,
            "times"
          )
        ),
        React.createElement(
          "div",
          { id: "start-end-menu" },
          React.createElement(
            "div",
            null,
            React.createElement(
              "label",
              null,
              React.createElement("input", { type: "checkbox", checked: this.state.isStart, onChange: this.toggleStart }),
              " Sentence start"
            )
          ),
          React.createElement(
            "div",
            null,
            React.createElement(
              "label",
              null,
              React.createElement("input", { type: "checkbox", checked: this.state.isEnd, onChange: this.toggleEnd }),
              " Sentence end"
            )
          )
        )
      )
    );
  }
});

var ANDQueryArgs = (0, _createReactClass2.default)({
  displayName: "ANDQueryArgs",

  propTypes: {
    query: PT.string,
    onQueryChange: PT.func.isRequired
  },

  getInitialState: function getInitialState() {
    var _this7 = this;

    this.queryStrCache = {};

    console.log('ANDQueryArgs:', this.props.query);

    var repeat1, repeat2;
    var qlean = this.props.query;
    if (qlean) {
      var repeatMatch = qlean.match(/{ *(\d)* *(?:, *(\d)*)? *} *$/);

      if (repeatMatch !== null) {
        repeat1 = repeatMatch[1];
        repeat2 = repeatMatch[2] || repeat1;
        qlean = qlean.substring(0, qlean.length - repeatMatch[0].length);
      }

      // replace token's [ and ]
      qlean = qlean.replace(/^\s*\[\s*/, '').replace(/\s*\]\s*$/, '');
    }

    var match = queryToANDArgs(qlean);
    console.log('ANDQueryArgs 2:', match);
    if (match === null) {
      return {
        ands: ["and-" + nextId()]
      };
    }

    var ands = [];
    match.forEach(function (m) {
      var id = 'and-' + nextId();
      ands.push(id);
      _this7.queryStrCache[id] = m;
    });

    return {
      ands: ands,
      repeat1: repeat1,
      repeat2: repeat2
    };
  },

  addADVAnd: function addADVAnd() {
    var _this8 = this;

    this.setState(function (oldSt) {
      oldSt.ands.push('and-' + nextId());
      return { ands: _this8.state.ands };
    });
  },

  removeADVAnd: function removeADVAnd(id) {
    var _this9 = this;

    this.setState(function (oldSt) {
      delete _this9.queryStrCache[id];
      oldSt.ands.splice(oldSt.ands.indexOf(id), 1);
      return { ands: oldSt.ands };
    }, this.fireQueryChange);
  },

  onMenuChange: function onMenuChange(menust) {
    var _this10 = this;

    this.setState({
      menuState_isStart: menust.isStart,
      menuState_isEnd: menust.isEnd,
      menuState_repeat1: menust.repeat1,
      menuState_repeat2: menust.repeat2
    }, function () {
      return _this10.fireQueryChange();
    });
  },
  fireQueryChange: function fireQueryChange() {
    var _this11 = this;

    var andParts = this.state.ands.map(function (id) {
      return _this11.queryStrCache[id];
    });

    if (this.state.menuState_isStart) {
      andParts.push('lbound(sentence)');
    }
    if (this.state.menuState_isEnd) {
      andParts.push('rbound(sentence)');
    }

    var queryString = andParts.length >= 2 ? andParts.join(' & ') : andParts[0];
    queryString = "[ " + queryString + " ]";

    if (this.state.menuState_repeat1 || this.state.menuState_repeat2) {
      queryString = queryString + '{' + (this.state.menuState_repeat1 || this.state.menuState_repeat2) + ',' + (this.state.menuState_repeat2 || this.state.menuState_repeat1) + '}';
    }

    this.props.onQueryChange(queryString);
  },
  onQueryChange: function onQueryChange(andId, queryStr) {
    this.queryStrCache[andId] = queryStr;
    this.fireQueryChange();
  },


  renderANDTokenFooter: function renderANDTokenFooter() {
    var _this12 = this;

    return React.createElement(
      "div",
      { className: "token_footer" },
      React.createElement(
        "button",
        { className: "btn btn-xs btn-default image_button insert_arg", onClick: this.addADVAnd, ref: "addAndButton" },
        React.createElement("i", { className: "glyphicon glyphicon-plus" })
      ),
      React.createElement(ADVTokenMenu, { ref: function ref(_ref) {
          return _this12.menuRef = _ref;
        }, onChange: this.onMenuChange, repeat1: this.state.repeat1, repeat2: this.state.repeat2 }),
      React.createElement("div", { style: { clear: "both" } })
    );
  },

  render: function render() {
    var _this13 = this;

    var andQueryArgs = this.state.ands.map(function (andId) {
      return React.createElement(
        _reactTransitionGroup.CSSTransition,
        { key: andId, classNames: "fade", timeout: { enter: 200, exit: 200 } },
        React.createElement(
          "div",
          { className: "and query_arg" },
          React.createElement(
            "span",
            { className: "hidden" },
            "and"
          ),
          React.createElement(ANDQueryORArgs, {
            query: _this13.queryStrCache[andId],
            onQueryChange: function onQueryChange(qs) {
              return _this13.onQueryChange(andId, qs);
            },
            handleRemoveADVAnd: function handleRemoveADVAnd() {
              return _this13.removeADVAnd(andId);
            }
          })
        )
      );
    });
    return React.createElement(
      "div",
      null,
      React.createElement(
        _reactTransitionGroup.TransitionGroup,
        null,
        andQueryArgs
      ),
      this.renderANDTokenFooter()
    );
  }
});

var ANDQueryORArgs = (0, _createReactClass2.default)({
  displayName: "ANDQueryORArgs",

  propTypes: {
    query: PT.string,
    onQueryChange: PT.func.isRequired,
    handleRemoveADVAnd: PT.func.isRequired
  },

  getInitialState: function getInitialState() {
    var _this14 = this;

    this.queryStrCache = {};

    console.log('ANDQueryORArgs:', this.props.query);
    var match = queryToORArgs(this.props.query);
    console.log('ANDQueryORArgs 2:', match);

    if (match === null) {
      return {
        ors: ["or-" + nextId()]
      };
    }

    var ors = [];
    match.forEach(function (m) {
      var id = 'or-' + nextId();
      ors.push(id);
      _this14.queryStrCache[id] = m;
    });

    return {
      ors: ors
    };
  },

  validateADV: function validateADV(value) {
    //fixme! - disable SearchButton if not atleast 1 token is in the query filter
    return;
  },

  fireQueryChange: function fireQueryChange() {
    var _this15 = this;

    var orParts = this.state.ors.map(function (id) {
      return _this15.queryStrCache[id];
    });
    var queryString = orParts.length >= 2 ? '( ' + orParts.join(' | ') + ' )' : orParts[0];
    this.props.onQueryChange(queryString);
  },


  addADVOr: function addADVOr(e) {
    var _this16 = this;

    this.setState(function (oldSt) {
      oldSt.ors.push('or-' + nextId());
      return { ors: _this16.state.ors };
    });
  },

  removeADVOr: function removeADVOr(id) {
    var _this17 = this;

    this.setState(function (oldSt) {
      delete _this17.queryStrCache[id];
      oldSt.ors.splice(oldSt.ors.indexOf(id), 1);
      return { ors: oldSt.ors };
    }, function () {
      if (_this17.state.ors.length === 0) {
        _this17.props.handleRemoveADVAnd();
      } else {
        _this17.fireQueryChange();
      }
    });
  },

  onQueryChange: function onQueryChange(orId, queryStr) {
    this.queryStrCache[orId] = queryStr;
    this.fireQueryChange();
  },
  render: function render() {
    var _this18 = this;

    var orArgs = this.state.ors.map(function (orId) {
      return React.createElement(
        _reactTransitionGroup.CSSTransition,
        { key: orId, classNames: "fade", timeout: { enter: 200, exit: 200 } },
        React.createElement(ORArg, {
          query: _this18.queryStrCache[orId],
          handleRemoveADVOr: function handleRemoveADVOr() {
            return _this18.removeADVOr(orId);
          },
          handleValidateADV: function handleValidateADV() {
            return true;
          },
          onQueryChange: function onQueryChange(qs) {
            return _this18.onQueryChange(orId, qs);
          }
        })
      );
    });
    return React.createElement(
      "div",
      null,
      React.createElement(
        "div",
        { className: "or_container" },
        React.createElement(
          _reactTransitionGroup.TransitionGroup,
          null,
          orArgs
        )
      ),
      React.createElement(
        "div",
        { className: "arg_footer" },
        React.createElement(
          "span",
          { className: "link", onClick: this.addADVOr },
          "or"
        ),
        React.createElement("div", { style: { clear: "both" } })
      )
    );
  }
});

var ORArg = (0, _createReactClass2.default)({
  displayName: "ORArg",

  mixins: [_reactAddonsPureRenderMixin2.default],

  propTypes: {
    query: PT.string,
    handleValidateADV: PT.func.isRequired,
    handleRemoveADVOr: PT.func.isRequired,
    onQueryChange: PT.func.isRequired
  },

  getInitialState: function getInitialState() {
    console.log('ORArg:', this.props.query);
    var qp = queryParse(this.props.query);
    console.log('ORArg 2:', qp);

    if (qp !== null) {
      var layer = qp.layer;
      var op = qp.op;
      var val = qp.val;
    }
    return {
      layer: layer || 'word',
      argOpt: op || 'is',
      argValue: val || '',

      editingText: false
    };
  },
  fireQueryChange: function fireQueryChange() {
    var queryString = layerToQueryString(this.state.layer, this.state.argOpt, this.state.argValue);
    this.props.onQueryChange(queryString);
  },
  onlayerChange: function onlayerChange(evt) {
    var layer = evt.target.value;
    this.setState(function (st) {
      var argOpt = getLayerArgOpts(layer)[0].value;
      var lvo = getLayerValueOptions(layer, argOpt, st.argValue);
      var argValue = '';
      if (lvo === undefined) argValue = '';else argValue = lvo[0].value;

      return {
        layer: layer,
        argOpt: argOpt,
        argValue: argValue
      };
    });
  },
  onArgOptChange: function onArgOptChange(evt) {
    var argOpt = evt.target.value;
    this.setState({ argOpt: argOpt });
  },
  onArgValueChange: function onArgValueChange(evt) {
    var value = evt.target.value;
    //console.log("picked arg value", value);

    this.setState({ argValue: value });
  },
  componentDidMount: function componentDidMount() {
    this.fireQueryChange();
  },
  componentDidUpdate: function componentDidUpdate(prevProps, prevState) {
    // after state update.
    if (prevState.layer !== this.state.layer || prevState.argOpt !== this.state.argOpt || prevState.argValue !== this.state.argValue
    /*|| (!this.state.editingText && prevState.argValue !== this.state.argValue) // only update text-value input on field blur 
    || (prevState.editingText !== this.state.editingText && prevState.editingText) // stopped editing text field.
    */
    ) {
        this.fireQueryChange();
      }
  },
  renderInput: function renderInput() {
    var _this19 = this;

    var valueOptions = getLayerValueOptions(this.state.layer, this.state.argOpt, this.state.argValue);

    if (valueOptions === undefined) {
      return React.createElement("input", { type: "text", className: "form-control",
        value: this.state.argValue,
        onChange: this.onArgValueChange,
        onFocus: function onFocus() {
          return _this19.setState({ editingText: true });
        },
        onBlur: function onBlur() {
          return _this19.setState({ editingText: false });
        }
      });
    } else {
      return React.createElement(
        "select",
        { className: "form-control", value: this.state.argValue, onChange: this.onArgValueChange, onFocus: function onFocus() {
            return _this19.setState({ editingText: true });
          }, onBlur: function onBlur() {
            return _this19.setState({ editingText: false });
          } },
        valueOptions.map(function (valOpt) {
          return React.createElement(
            "option",
            { value: valOpt.value },
            valOpt.label
          );
        })
      );
    }
  },


  render: function render() {
    return React.createElement(
      "div",
      { className: "or or_arg" },
      React.createElement(
        "div",
        { className: "left_col" },
        React.createElement(
          "button",
          { className: "btn btn-xs btn-default image_button remove_arg", onClick: this.props.handleRemoveADVOr },
          React.createElement("i", { className: "glyphicon glyphicon-minus" })
        )
      ),
      React.createElement(
        "div",
        { className: "right_col inline_block", style: { display: "inline-block" } },
        " ",
        React.createElement(
          "div",
          { className: "arg_selects form-inline" },
          React.createElement(
            "select",
            { className: "arg_type form-control", value: this.state.layer, onChange: this.onlayerChange },
            layerCategories.map(function (cat) {
              return React.createElement(
                "optgroup",
                { label: cat.label },
                cat.layers.map(function (layer) {
                  return React.createElement(
                    "option",
                    { value: layer },
                    getLayerLabel(layer)
                  );
                })
              );
            })
          ),
          React.createElement(
            "select",
            { className: "arg_opts form-control", value: this.state.argOpt, onChange: this.onArgOptChange },
            getLayerArgOpts(this.state.layer).map(function (argOpt) {
              return React.createElement(
                "option",
                { value: argOpt.value },
                argOpt.label
              );
            })
          )
        ),
        React.createElement(
          "div",
          { className: "arg_val_container" },
          this.renderInput()
        )
      )
    );
  }
});

function getLayers() {
  var layers_arr = [];
  for (var l in layers) {
    layers_arr.push(l);
  }
  return layers_arr;
}

function getLayerArgOpts(layer) {
  return layers[layer].argOpts;
}

function isValidLayerOperator(layer, operator) {
  return !!layers[layer].argOpts.find(function (e) {
    return e.value === operator;
  });
}
function isValidLayerValue(layer, operator, value) {
  var valopts = getLayerValueOptions(layer);
  if (!valopts) {
    return true;
  }
  return valopts.indexOf(value) !== -1;
}

function layerToQueryString(layer, operator, value) {
  var toStr = layers[layer].toQueryString;
  if (!toStr) {
    toStr = getLayerArgOpts(layer).defaultToStr;
  }
  if (!toStr) {
    toStr = wordOptions.defaultToStr;
    console.warn("layerToQueryString: couldnt find a toQueryString method!");
  }
  var qstr = toStr(layer, operator, value);
  if (qstr === undefined) {
    console.warn("layerToQueryString: qstr undefined!");
    return 'undefined';
  }
  return qstr;
}

function getLayerLabel(layer) {
  return layers[layer].label;
}

function getOperatorLabel(layer, operator) {
  return layers[layer].argOpts[operator].label;
}

function getLayerValueOptions(layer, operator, value) {
  var valopts = layers[layer].valueOptions;
  if (!valopts) {
    return;
  }
  if (typeof valopts === 'function') {
    return valopts(layer, operator, value);
  } else if (valopts.length) {
    return valopts; // array
  }
}

// a RE string matching a "double-quote"d string
var quotedStringRE = /(?:"(?:\\"|[^"])*")/.source;

// in: 'word = "zebra" '
// out: ['word', '=', 'zebra']
function queryParse(q) {
  if (!q) return null;
  var match = q.match(/^\s*(\w+) *(=|!=) *"((?:\\"|.)*?)"/);
  if (match === null) {
    return null;
  }

  var layer = match[1];
  var op = match[2];
  var value = match[3];

  var fromStr = getLayerArgOpts(layer).fromQueryString;
  if (!fromStr) {
    fromStr = getLayerArgOpts(layer).defaultFromString;
  }
  if (!fromStr) {
    fromStr = wordOptions.defaultFromStr;
    log.error("queryParse: couldnt find a fromQueryString method!");
  }

  return fromStr(layer, op, value);
}

// in: '(word = "zebra" | word = "zoo" ...)'
// out: ['word = "zebra" ', ' (word = "zoo" ...)']
function queryToORArgs(q) {
  if (!q) return null;
  var match = q.trim().match(queryToORArgs.re);
  return match;
}
queryToORArgs.re = RegExp('(?:' + quotedStringRE + '|[^()|])+', 'g');

// in: '[word = "zebra" & (word = "zoo" ...)]'
// out: ['word = "zebra" ', ' (word = "zoo" ...)']
function queryToANDArgs(q) {
  if (!q) return null;

  var match = q.trim().match(queryToANDArgs.re);
  return match;
}
queryToANDArgs.re = RegExp('(?:' + quotedStringRE + '|[^&])+', 'g');

// in: '[word = "zebra"] [word = "zoo"]'
// out: ['[word = "zebra"]', '[word = "zoo"]']
function queryToTokens(q) {
  if (!q) return null;
  var match = q.match(queryToTokens.re);
  return match;
}
queryToTokens.re = RegExp('\\[(?:' + quotedStringRE + '|.)*?\\] *(?:\\{.*?\\})?', 'g');

/*To simplify matching regex filter out words within "quotemarks". This help to not stumble on any special characters that can occur there. */
function filterWords(s, f) {
  var filteredString = s.replace(/("(?:\\"|[^"])*")/g, function (m) {
    filteredWords.push(m);
    return '""';
  });
  var ret = f(filteredString);
  // restore words

  // return return value
  return ret;
}

var wordOptions = [{ value: 'is', label: 'is' }, { value: 'is_not', label: 'is not' }, { value: 'contains', label: 'contains' }, { value: 'starts_with', label: 'starts with' }, { value: 'ends_with', label: 'ends with' }, { value: 'regex', label: 'regex' }, { value: 'not_regex', label: 'not regex' }];
var liteOptions = [{ value: "is", label: "is" }, { value: "is_not", label: "is not" }];
var setOptions = [{ value: "is", label: "is" }, { value: "is_not", label: "is not" }];
var probabilitySetOptions = [{ value: "is", label: "highest_rank" }, { value: "is_not", label: "not_highest_rank" }, { value: "contains", label: "rank_contains" }, { value: "contains_not", label: "not_rank_contains" }];

setOptions.defaultToStr = function (layer, op, val) {
  switch (op) {
    case 'is':
      return layer + " = \"" + val + "\"";
    case 'is_not':
      return layer + " != \"" + val + "\"";
  }
};
setOptions.defaultFromString = function (layer, op, val) {
  return { layer: layer, op: op === '!=' ? 'is_not' : 'is', val: val };
};

wordOptions.defaultToStr = function (layer, op, val) {
  var unescVal = val;
  var val = escapeRegExp(val);
  switch (op) {
    case 'is':
      return layer + " = \"" + val + "\"";
    case 'is_not':
      return layer + " != \"" + val + "\"";
    case 'contains':
      return layer + " = \".*" + val + ".*\"";
    case 'starts_with':
      return layer + " = \"" + val + ".*\"";
    case 'ends_with':
      return layer + " = \".*" + val + "\"";
    case 'regex':
      return layer + " = \"" + unescVal + "\"";
    case 'not_regex':
      return layer + " != \"" + unescVal + "\"";
  }
};
wordOptions.defaultFromString = function (layer, op, val) {
  // layer should be good. Now figure out op, and if val is escaped or not
  if (op === '=') {
    var strippedOfSemiRE = val.replace(/^\.\*/, '').replace(/\.\*$/, '');
    if (strippedOfSemiRE.length !== val.length) {
      // could be one of: startswith, contains, endswith.
      if (!guessIfRegexp(strippedOfSemiRE)) {
        // Ok, it is one of: startswith, contains, endswith.
        if (val.startsWith('.*') && val.endsWith('.*')) {
          var op2 = 'contains';
        } else if (val.startsWith('.*')) {
          op2 = 'starts_with';
        } else if (val.endsWith('.*')) {
          op2 = 'ends_with';
        } else {
          console.error("parsing query failed due to coding error");
          return null;
        }
        return {
          layer: layer,
          op: op2,
          val: unescapeRegExp(strippedOfSemiRE)
        };
      }
      // its regexp.
    }
  }

  if (guessIfRegexp(val)) {
    // its regexp
    return { layer: layer, op: op === '=' ? 'regex' : 'not_regex', val: val };
  }

  // its not regexp
  return { layer: layer, op: op === '=' ? 'is' : 'is_not', val: unescapeRegExp(val) };
};
function guessIfRegexp(s) {
  return !!s.match(/[^\\][-[\]{}()*+\\?.,^$|#]/); // find if it contains any unescaped regex characters
}
function unescapeRegExp(text) {
  return text.replace(/\\([-[\]{}()*+?.,\\^$|#])/g, '$1');
}
function escapeRegExp(text) {
  return text.replace(/[-[\]{}()*+?.,\\^$|#]/g, '\\$&');
}

var layers = {
  'word': {
    label: 'word',
    argOpts: wordOptions
  },
  'pos': {
    label: 'part-of-speech UD v2.0 tagset',
    argOpts: setOptions,
    valueOptions: [{ value: "ADJ", label: "Adjective" }, { value: "ADV", label: "Adverb" }, { value: "INTJ", label: "Interjection" }, { value: "NOUN", label: "Noun" }, { value: "PROPN", label: "Proper noun" }, { value: "VERB", label: "Verb" }, { value: "ADP", label: "Adposition" }, { value: "AUX", label: "Auxiliary" }, { value: "CCONJ", label: "Coordinating conjunction" }, { value: "DET", label: "Determiner" }, { value: "NUM", label: "Numeral" }, { value: "PART", label: "Particle" }, { value: "PRON", label: "Pronoun" }, { value: "SCONJ", label: "Subordinating conjunction" }, { value: "PUNCT", label: "Punctuation" }, { value: "SYM", label: "Symbol" }, { value: "X", label: "Other" }]
  },
  'lemma': {
    label: 'lemmatization of tokens',
    argOpts: wordOptions
  },
  'orth': {
    label: 'orthographic transcription',
    argOpts: wordOptions
  },
  'norm': {
    label: 'orthographic normalization',
    argOpts: wordOptions
  },
  'phonetic': {
    label: 'phonetic transcription SAMPA',
    argOpts: wordOptions // TODO special toString/parse? (probably due to regex character handling)
  },
  'text': {
    label: 'Layer only for Basic Search',
    argOpts: wordOptions
  },
  '_.text_language': {
    label: 'language',
    argOpts: wordOptions
  }
};

var layerCategories = [{ cat: 'word', label: 'Word', layers: ['word'] }, { cat: 'wordAttribute', label: 'Word attribute', layers: ['pos', 'lemma', 'orth', 'norm', 'phonetic', 'text'] }, { cat: 'textAttribute', label: 'Text attribute', layers: ['_.text_language'] }];

module.exports = QueryInput;

},{"./codemirror/mode/fcs-ql/fcs-ql":43,"classnames":2,"codemirror/mode/javascript/javascript":4,"create-react-class":6,"prop-types":15,"react-addons-pure-render-mixin":17,"react-codemirror2":18,"react-transition-group":30}],51:[function(require,module,exports){
"use strict";

var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _searchresourcebox = require("./searchresourcebox.jsx");

var _searchresourcebox2 = _interopRequireDefault(_searchresourcebox);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var ResourceView = (0, _createReactClass2.default)({
  displayName: "ResourceView",

  //fixme! - class ResourceView extends React.Component {
  propTypes: {
    resources: PT.object.isRequired,
    languageMap: PT.object.isRequired
  },

  getInitialState: function getInitialState() {
    var resources = this.props.resources;
    var resourcesGroupedByInstitute = this.updateResourcesGroupedByInstitute(resources);
    var resourcesGroupedByLanguage = this.updateResourcesGroupedByLanguage(resources);

    return {
      viewSelected: false, // only show the selected resources
      //showDisabled: false,  // don't hide items with {visible = false} // implemented, but out commented feature...
      viewGroupedByInstitution: false, // group by institution, then as usual
      viewGroupedByLanguage: false, // group by (single) language, then as usual
      resourcesGroupedByInstitute: resourcesGroupedByInstitute, // group info (is-expanded, resources list)
      resourcesGroupedByLanguage: resourcesGroupedByLanguage, // group info (with language as key) (is-expanded, resources list)
      resources: resources // cached but unused, just to check for updates
    };
  },
  componentWillReceiveProps: function componentWillReceiveProps(nextProps) {
    // console.debug("componentWillReceiveProps", nextProps);
    var resources = nextProps.resources;
    if (this.props.resources == resources) {
      return;
    }
    var resourcesGroupedByInstitute = this.updateResourcesGroupedByInstitute(resources);
    var resourcesGroupedByLanguage = this.updateResourcesGroupedByLanguage(resources);
    this.setState({
      resources: this.props.resources,
      resourcesGroupedByInstitute: resourcesGroupedByInstitute,
      resourcesGroupedByLanguage: resourcesGroupedByLanguage
    });
  },


  updateResourcesGroupedByInstitute: function updateResourcesGroupedByInstitute(resources) {
    var resourcesGroupedByInstitute = {};
    resources.resources.forEach(function (resource) {
      var institute = resource.institution;
      if (!resourcesGroupedByInstitute.hasOwnProperty(institute)) {
        resourcesGroupedByInstitute[institute] = { expanded: true, resources: [] };
      }
      resourcesGroupedByInstitute[institute].resources.push(resource);
    });
    //console.debug(resourcesGroupedByInstitute);
    return resourcesGroupedByInstitute;
  },

  updateResourcesGroupedByLanguage: function updateResourcesGroupedByLanguage(resources) {
    var resourcesGroupedByLanguage = {};
    resources.resources.forEach(function (resource) {
      resource.languages.forEach(function (language) {
        if (!resourcesGroupedByLanguage.hasOwnProperty(language)) {
          resourcesGroupedByLanguage[language] = { expanded: true, resources: [] };
        }
        resourcesGroupedByLanguage[language].resources.push(resource);
      });
    });
    //console.debug(resourcesGroupedByLanguage);
    return resourcesGroupedByLanguage;
  },

  toggleSelection: function toggleSelection(resource, e) {
    var s = !resource.selected;
    this.props.resources.recurseResource(resource, function (r) {
      r.selected = s;
    });
    this.props.resources.update();
    this.stop(e);
  },

  toggleViewSelected: function toggleViewSelected(evt) {
    this.setState(function (st) {
      return { viewSelected: !st.viewSelected };
    });
  },
  toggleShowDisabled: function toggleShowDisabled(evt) {
    this.setState(function (st) {
      return { showDisabled: !st.showDisabled };
    });
  },
  toggleViewGroupByInstitution: function toggleViewGroupByInstitution(evt) {
    this.setState(function (st) {
      return {
        viewGroupedByInstitution: !st.viewGroupedByInstitution,
        viewGroupedByLanguage: false
      };
    });
  },
  toggleViewGroupByLanguage: function toggleViewGroupByLanguage(evt) {
    this.setState(function (st) {
      return {
        viewGroupedByInstitution: false,
        viewGroupedByLanguage: !st.viewGroupedByLanguage
      };
    });
  },


  toggleDescExpansion: function toggleDescExpansion(resource) {
    resource.descExpanded = !resource.descExpanded;
    this.props.resources.update();
  },

  toggleExpansion: function toggleExpansion(resource) {
    resource.expanded = !resource.expanded;
    this.props.resources.update();
  },

  toggleExpansionGrouped: function toggleExpansionGrouped(groupedResources) {
    groupedResources.expanded = !groupedResources.expanded;
    this.setState({
      resourcesGroupedByInstitute: this.state.resourcesGroupedByInstitute,
      resourcesGroupedByLanguage: this.state.resourcesGroupedByLanguage
    });
  },

  selectAll: function selectAll(value) {
    // select all _visible_
    this.props.resources.recurse(function (c) {
      c.visible ? c.selected = value : false;
    });
    this.props.resources.update();
  },

  selectAllFromList: function selectAllFromList(resources, value) {
    // like selectAll(), just for list of resources
    this.props.resources.recurseResources(resources, function (r) {
      r.visible ? r.selected = value : false;
    });
    this.props.resources.update();
  },

  selectAllShown: function selectAllShown(value) {
    // select only visible/shown resources, i.e. resources that are shown in dialog, possibly filtered due to query
    this.props.resources.recurse(function (r) {
      r.visible && r.priority > 0 ? r.selected = value : false;
    });
    this.props.resources.update();
  },

  searchResource: function searchResource(query) {
    // sort fn: descending priority, stable sort
    var sortFn = function sortFn(a, b) {
      if (b.priority === a.priority) {
        return b.index - a.index; // stable sort
      }
      return b.priority - a.priority;
    };

    query = query.toLowerCase();
    if (!query) {
      this.props.resources.recurse(function (resource) {
        resource.priority = 1;
      });
      this.props.resources.update();
      return;
    }

    // clean up all priorities
    this.props.resources.recurse(function (resource) {
      resource.priority = 0;
    });

    // find priority for each resource
    var querytokens = query.split(" ").filter(function (x) {
      return x.length > 0;
    });
    this.props.resources.recurse(function (resource) {
      var title = resource.title;
      querytokens.forEach(function (qtoken) {
        if (title && title.toLowerCase().indexOf(qtoken) >= 0) {
          resource.priority++;
        }
        if (resource.description && resource.description.toLowerCase().indexOf(qtoken) >= 0) {
          resource.priority++;
        }
        if (resource.institution && resource.institution.toLowerCase().indexOf(qtoken) >= 0) {
          resource.priority++;
        }
        if (resource.languages) {
          resource.languages.forEach(function (lang) {
            if (lang.toLowerCase().indexOf(qtoken) >= 0) {
              resource.priority++;
            }
          });
          resource.languages.forEach(function (lang) {
            if (this.props.languageMap[lang].toLowerCase().indexOf(qtoken) >= 0) {
              resource.priority++;
            }
          }.bind(this));
        }
      }.bind(this));
    }.bind(this));

    // ensure parents of visible resources are also visible; maximum depth = 3
    var isVisibleFn = function isVisibleFn(resource) {
      return resource.priority > 0;
    };
    var parentBooster = function parentBooster(resource) {
      if (resource.priority <= 0 && resource.subResources) {
        if (resource.subResources.some(isVisibleFn)) {
          resource.priority = 0.5;
        }
      }
    };
    for (var i = 3; i > 0; i--) {
      this.props.resources.recurse(parentBooster);
    }

    this.props.resources.recurse(function (resource) {
      resource.subResources.sort(sortFn);
    });
    this.props.resources.resources.sort(sortFn);

    // display
    this.props.resources.update();
  },

  stop: function stop(e) {
    e.stopPropagation();
  },

  getMinMaxPriority: function getMinMaxPriority() {
    var min = 1,
        max = 0;
    this.props.resources.recurse(function (c) {
      if (c.priority < min) min = c.priority;
      if (max < c.priority) max = c.priority;
    });
    return [min, max];
  },

  renderCheckbox: function renderCheckbox(resource) {
    return React.createElement(
      "button",
      { className: "btn btn-default" },
      resource.selected ? React.createElement("span", { className: "glyphicon glyphicon-check", "aria-hidden": "true" }) : React.createElement("span", { className: "glyphicon glyphicon-unchecked", "aria-hidden": "true" })
    );
  },

  renderExpansion: function renderExpansion(resource) {
    if (!resource.subResources || resource.subResources.length === 0) {
      return false;
    }
    return React.createElement(
      "div",
      { className: "expansion-handle", onClick: this.toggleExpansion.bind(this, resource) },
      React.createElement(
        "a",
        null,
        resource.expanded ? React.createElement("span", { className: "glyphicon glyphicon-minus", "aria-hidden": "true" }) : React.createElement("span", { className: "glyphicon glyphicon-plus", "aria-hidden": "true" }),
        resource.expanded ? " Collapse " : " Expand ",
        " (",
        resource.subResources.length,
        " subresources)"
      )
    );
  },

  renderExpansionGrouped: function renderExpansionGrouped(groupedResources) {
    if (!groupedResources.resources || groupedResources.resources.length === 0) {
      return false;
    }

    var selectedCount = 0;
    this.props.resources.recurseResources(groupedResources.resources, function (c) {
      if (c.selected && c.visible) selectedCount++;
    });

    return React.createElement(
      "div",
      { className: "expansion-handle", onClick: this.toggleExpansionGrouped.bind(this, groupedResources) },
      React.createElement(
        "a",
        null,
        groupedResources.expanded ? React.createElement("span", { className: "glyphicon glyphicon-minus", "aria-hidden": "true" }) : React.createElement("span", { className: "glyphicon glyphicon-plus", "aria-hidden": "true" }),
        groupedResources.expanded ? " Collapse " : " Expand ",
        " (",
        groupedResources.resources.length,
        " root resource",
        groupedResources.resources.length != 1 ? "s" : "",
        ", ",
        selectedCount,
        " (sub)resource",
        selectedCount != 1 ? "s" : "",
        " selected)"
      )
    );
  },

  renderSelectionButtonsGrouped: function renderSelectionButtonsGrouped(resources) {
    return React.createElement(
      "div",
      { className: "float-right inline", style: { paddingTop: "1.5em" } },
      React.createElement(
        "button",
        { className: "btn btn-default", style: { marginRight: 10 }, onClick: this.selectAllFromList.bind(this, resources, true) },
        " Select all"
      ),
      React.createElement(
        "button",
        { className: "btn btn-default", style: { marginRight: 20 }, onClick: this.selectAllFromList.bind(this, resources, false) },
        " Deselect all"
      )
    );
  },

  renderLanguages: function renderLanguages(languages) {
    return languages.map(function (l) {
      return this.props.languageMap[l];
    }.bind(this)).sort().join(", ");
  },

  shouldShowItem: function shouldShowItem(level, resource) {
    if (this.state.viewSelected && !resource.selected) {
      return false;
    }
    if (!this.state.showDisabled && !resource.visible) {
      return false;
    }
    // normal search filter.
    if (level === 0 && resource.priority <= 0) {
      return false;
    }

    return true;
  },
  renderFilteredMessage: function renderFilteredMessage() {
    var _this = this;

    var total = 0;
    var visible = 0;
    this.props.resources.recurse(function (resource) {
      if (resource.visible || _this.state.showDisabled) {
        total++;
        if (_this.shouldShowItem(0, resource)) {
          visible++;
        }
      }
    });
    if (visible === total) {
      return false;
    }
    if (visible === 0) {
      return false; // we do have an "empty" message anyway
    }
    return React.createElement(
      "div",
      null,
      " Showing ",
      visible,
      " out of ",
      total,
      " (sub)resource",
      total != 1 ? "s" : "",
      ". "
    );
  },


  renderResource: function renderResource(level, minmaxp, resource) {
    if (!this.shouldShowItem(level, resource)) {
      return;
    }

    var indent = { marginLeft: level * 50 };
    var resourceContainerClass = "resource-container " + (resource.priority > 0 ? "" : "dimmed");

    var hue = 120 * resource.priority / minmaxp[1];
    var color = minmaxp[0] === minmaxp[1] ? 'transparent' : 'hsl(' + hue + ', 50%, 50%)';
    var priorityStyle = { paddingBottom: 4, paddingLeft: 2, borderBottom: '3px solid ' + color };
    var expansive = resource.descExpanded ? { overflow: 'hidden' } : { whiteSpace: 'nowrap', overflow: 'hidden', textOverflow: 'ellipsis' };
    return React.createElement(
      "div",
      { className: resourceContainerClass, key: resource.id },
      React.createElement(
        "div",
        { className: "row resource", onClick: this.toggleDescExpansion.bind(this, resource) },
        React.createElement(
          "div",
          { className: "col-sm-1 vcenter" },
          React.createElement(
            "div",
            { className: "inline", style: priorityStyle, onClick: this.toggleSelection.bind(this, resource) },
            this.renderCheckbox(resource)
          )
        ),
        React.createElement(
          "div",
          { className: "col-sm-8 vcenter" },
          React.createElement(
            "div",
            { style: indent },
            React.createElement(
              "h3",
              { style: expansive },
              resource.title,
              resource.landingPage ? React.createElement(
                "a",
                { href: resource.landingPage, onClick: this.stop },
                React.createElement(
                  "span",
                  { style: { fontSize: 12 } },
                  " \u2013 Homepage "
                ),
                React.createElement("i", { className: "glyphicon glyphicon-home" })
              ) : false
            ),
            React.createElement(
              "p",
              { style: expansive },
              resource.description
            ),
            this.renderExpansion(resource)
          )
        ),
        React.createElement(
          "div",
          { className: "col-sm-3 vcenter" },
          React.createElement(
            "p",
            { style: expansive },
            React.createElement("i", { className: "fa fa-institution" }),
            " ",
            resource.institution
          ),
          React.createElement(
            "p",
            { style: expansive },
            React.createElement("i", { className: "fa fa-language" }),
            " ",
            this.renderLanguages(resource.languages)
          )
        )
      ),
      resource.expanded ? resource.subResources.map(this.renderResource.bind(this, level + 1, minmaxp)) : false
    );
  },

  renderCorpList: function renderCorpList() {
    var _this2 = this;

    var minmaxp = this.getMinMaxPriority();

    var corpListRender = [];

    // this is so we get a non-undefined items .length in corpListRender.
    this.props.resources.resources.forEach(function (c) {
      var rend = _this2.renderResource(0, minmaxp, c);
      if (rend) corpListRender.push(rend);
    });

    return React.createElement(
      "div",
      { className: "resourceview-resources" },
      corpListRender.length > 0 ? corpListRender : React.createElement(
        "h3",
        { className: "aligncenter" },
        this.state.viewSelected ? "No resources selected yet!" : "No resources found."
      )
    );
  },
  renderCorpListGroupedByInstitution: function renderCorpListGroupedByInstitution() {
    var _this3 = this;

    var minmaxp = this.getMinMaxPriority();

    var groupedListRender = [];
    Object.entries(this.state.resourcesGroupedByInstitute).forEach(function (_ref) {
      var _ref2 = _slicedToArray(_ref, 2),
          institution = _ref2[0],
          groupedResources = _ref2[1];

      var corpListRender = [];
      // this is so we get a non-undefined items .length in corpListRender.
      groupedResources.resources.forEach(function (c) {
        var rend = _this3.renderResource(0, minmaxp, c);
        if (rend) corpListRender.push(rend);
      });
      if (corpListRender.length > 0) {
        groupedListRender.push(React.createElement(
          "div",
          { className: "resourceview-resources" },
          _this3.renderSelectionButtonsGrouped(groupedResources.resources),
          React.createElement(
            "h3",
            { style: { paddingTop: "0.5em" } },
            React.createElement("i", { "class": "fa fa-institution" }),
            " ",
            institution
          ),
          _this3.renderExpansionGrouped(groupedResources),
          groupedResources.expanded ? corpListRender : false
        ));
      }
    });

    return React.createElement(
      "div",
      { className: "resourceview-institutions" },
      groupedListRender.length > 0 ? groupedListRender : React.createElement(
        "h3",
        { className: "aligncenter" },
        this.state.viewSelected ? "No resources selected yet!" : "No resources found."
      )
    );
  },
  renderCorpListGroupedByLanguage: function renderCorpListGroupedByLanguage() {
    var _this4 = this;

    var minmaxp = this.getMinMaxPriority();

    var groupedListRender = [];
    Object.entries(this.state.resourcesGroupedByLanguage).forEach(function (_ref3) {
      var _ref4 = _slicedToArray(_ref3, 2),
          language = _ref4[0],
          groupedResources = _ref4[1];

      var corpListRender = [];
      // this is so we get a non-undefined items .length in corpListRender.
      groupedResources.resources.forEach(function (c) {
        var rend = _this4.renderResource(0, minmaxp, c);
        if (rend) corpListRender.push(rend);
      });
      if (corpListRender.length > 0) {
        groupedListRender.push(React.createElement(
          "div",
          { className: "resourceview-resources" },
          _this4.renderSelectionButtonsGrouped(groupedResources.resources),
          React.createElement(
            "h3",
            { style: { paddingTop: "0.5em" } },
            React.createElement("i", { "class": "fa fa-language" }),
            " ",
            _this4.props.languageMap[language],
            " [",
            language,
            "]"
          ),
          _this4.renderExpansionGrouped(groupedResources),
          groupedResources.expanded ? corpListRender : false
        ));
      }
    });

    return React.createElement(
      "div",
      { className: "resourceview-languages" },
      groupedListRender.length > 0 ? groupedListRender : React.createElement(
        "h3",
        { className: "aligncenter" },
        this.state.viewSelected ? "No resources selected yet!" : "No resources found."
      )
    );
  },
  render: function render() {
    var selectedCount = 0;
    //var disabledCount = 0;
    this.props.resources.recurse(function (c) {
      if (c.selected && c.visible) selectedCount++;
      //if (c.selected) selectedCount++;
      //if (!c.visible) disabledCount++;
    });

    var renderResourcesFn = null;
    if (this.state.viewGroupedByInstitution) {
      renderResourcesFn = this.renderCorpListGroupedByInstitution;
    } else if (this.state.viewGroupedByLanguage) {
      renderResourcesFn = this.renderCorpListGroupedByLanguage;
    } else {
      renderResourcesFn = this.renderCorpList;
    }

    return React.createElement(
      "div",
      { style: { margin: "0 30px" } },
      React.createElement(
        "div",
        { className: "row" },
        React.createElement(
          "div",
          { className: "float-left inline resourceview-filter-buttons" },
          React.createElement(
            "div",
            { className: "btn-group btn-group-toggle" },
            React.createElement(
              "label",
              { className: "btn btn-light btn " + (this.state.viewSelected ? 'active' : 'inactive'), onClick: this.toggleViewSelected, title: "View selected resources" },
              React.createElement("span", { className: this.state.viewSelected ? "glyphicon glyphicon-check" : "glyphicon glyphicon-unchecked" }),
              " View selected (",
              selectedCount,
              ")"
            ),
            React.createElement(
              "label",
              { className: "btn btn-light btn", style: { paddingRight: "0ex", pointerEvents: "none" } },
              "Group by "
            ),
            React.createElement(
              "label",
              { className: "btn btn-light btn " + (this.state.viewGroupedByInstitution ? 'active' : 'inactive'), style: { paddingRight: "0.5ex", paddingLeft: "0.5ex" }, onClick: this.toggleViewGroupByInstitution, title: "Group resources by institution" },
              React.createElement("span", { className: this.state.viewGroupedByInstitution ? "glyphicon glyphicon-check" : "glyphicon glyphicon-unchecked" }),
              " Institution"
            ),
            React.createElement(
              "label",
              { className: "btn btn-light btn " + (this.state.viewGroupedByLanguage ? 'active' : 'inactive'), style: { paddingLeft: "0.5ex" }, onClick: this.toggleViewGroupByLanguage, title: "Group resources by language" },
              React.createElement("span", { className: this.state.viewGroupedByLanguage ? "glyphicon glyphicon-check" : "glyphicon glyphicon-unchecked" }),
              " Language"
            )
          )
        ),
        React.createElement(
          "div",
          { className: "float-right inline" },
          React.createElement(
            "button",
            { className: "btn btn-default", style: { marginRight: 10 }, onClick: this.selectAll.bind(this, true) },
            " Select all"
          ),
          React.createElement(
            "button",
            { className: "btn btn-default", style: { marginRight: 10 }, onClick: this.selectAllShown.bind(this, true) },
            " Select visible"
          ),
          React.createElement(
            "button",
            { className: "btn btn-default", style: { marginRight: 20 }, onClick: this.selectAll.bind(this, false) },
            " Deselect all"
          )
        ),
        React.createElement(
          "div",
          { className: "float-right inline" },
          React.createElement(
            "div",
            { className: "inline", style: { marginRight: 20 } },
            React.createElement(_searchresourcebox2.default, { search: this.searchResource })
          )
        )
      ),
      React.createElement(
        "div",
        { className: "row", style: { marginBottom: 15 } },
        this.renderFilteredMessage()
      ),
      renderResourcesFn()
    );
  }
});

module.exports = ResourceView;

},{"./searchresourcebox.jsx":54,"classnames":2,"create-react-class":6,"prop-types":15}],52:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

var PT = _propTypes2.default;

window.MyAggregator = window.MyAggragtor || {};
var NO_MORE_RECORDS_DIAGNOSTIC_URI = window.MyAggregator.NO_MORE_RECORDS_DIAGNOSTIC_URI = "info:srw/diagnostic/1/61";

var ResultMixin = {
  // getDefaultProps: function(){
  // 	return {hasPopover: true};
  // },

  getInitialState: function getInitialState() {
    return {
      displayKwic: false,
      displayADV: false
    };
  },

  toggleKwic: function toggleKwic() {
    this.setState({ displayKwic: !this.state.displayKwic });
  },

  toggleADV: function toggleADV() {
    this.setState({ displayADV: !this.state.displayADV });
  },

  renderPanelTitle: function renderPanelTitle(resource) {
    return React.createElement(
      "div",
      { className: "inline" },
      React.createElement(
        "span",
        { className: "resourceName" },
        " ",
        resource.title
      ),
      React.createElement(
        "span",
        { className: "institutionName" },
        " \u2014 ",
        resource.institution
      )
    );
  },

  renderRowLanguage: function renderRowLanguage(hit) {
    return false; //<span style={{fontFace:"Courier",color:"black"}}>{hit.language} </span> ;
  },

  renderRefLink: function renderRefLink(hit) {
    if (!hit.reference) {
      return false;
    }
    return React.createElement(
      "a",
      { href: hit.reference, target: "_blank", title: "Go to resource hit" },
      React.createElement("span", { "class": "glyphicon glyphicon-link", style: { marginRight: ".5em" }, "aria-hidden": "true" })
    );
  },

  renderRowsAsHits: function renderRowsAsHits(hit, i) {
    function renderTextFragments(tf, idx) {
      return React.createElement(
        "span",
        { key: idx, className: tf.hit ? "keyword" : "" },
        tf.text
      );
    }
    return React.createElement(
      "p",
      { key: i, className: "hitrow" },
      this.renderRowLanguage(hit),
      this.renderRefLink(hit),
      hit.fragments.map(renderTextFragments)
    );
  },

  renderRowsAsKwic: function renderRowsAsKwic(hit, i) {
    var sleft = { textAlign: "left", verticalAlign: "top", width: "50%" };
    var scenter = { textAlign: "center", verticalAlign: "top", maxWidth: "50%" };
    var sright = { textAlign: "right", verticalAlign: "top", maxWidth: "50%" };
    return React.createElement(
      "tr",
      { key: i, className: "hitrow" },
      React.createElement(
        "td",
        null,
        this.renderRowLanguage(hit)
      ),
      React.createElement(
        "td",
        { style: sright },
        hit.left
      ),
      React.createElement(
        "td",
        { style: scenter, className: "keyword" },
        hit.keyword
      ),
      React.createElement(
        "td",
        { style: sleft },
        hit.right
      )
    );
  },

  renderRowsAsADV: function renderRowsAsADV(hit, i) {
    var sleft = { textAlign: "left", verticalAlign: "top", width: "50%" };
    var scenter = { textAlign: "center", verticalAlign: "top", maxWidth: "50%" };
    var sright = { textAlign: "right", verticalAlign: "top", maxWidth: "50%" };

    function renderSpans(span, idx) {
      return React.createElement(
        "td",
        { key: idx, className: span.hit ? "keyword" : "" },
        span.text
      );
    }
    return React.createElement(
      "tr",
      { key: i, className: "hitrow" },
      this.renderRowLanguage(hit),
      React.createElement(
        "td",
        { style: sleft },
        hit.pid
      ),
      React.createElement(
        "td",
        { style: sleft },
        hit.reference
      ),
      hit.spans.map(renderSpans)
    );
  },

  renderRowsAsADVGrouped: function renderRowsAsADVGrouped(resourceHit) {
    function renderWithSeperators(layers, i) {
      var pre = i != 0 ? [React.createElement(
        "tr",
        { "class": "hitrow-sep" },
        React.createElement("td", { colspan: "100%" })
      )] : [];
      return pre.concat(layers.map(this.renderRowsAsADV));
    }
    function renderPlainList(layers, i) {
      return layers.map(this.renderRowsAsADV);
    }
    var needsSeparators = Math.min.apply(Math, _toConsumableArray(resourceHit.advancedLayers.map(function (x) {
      return x.length;
    }))) > 1;
    return resourceHit.advancedLayers.map((needsSeparators ? renderWithSeperators : renderPlainList).bind(this));
  },

  renderDiagnostic: function renderDiagnostic(d, key) {
    if (d.uri === window.MyAggregator.NO_MORE_RECORDS_DIAGNOSTIC_URI) {
      return false;
    }
    return React.createElement(
      "div",
      { className: "alert alert-warning", key: key },
      React.createElement(
        "div",
        null,
        d.message
      )
    );
  },

  renderDiagnostics: function renderDiagnostics(resourceHit) {
    if (!resourceHit.diagnostics || resourceHit.diagnostics.length === 0) {
      return false;
    }
    return resourceHit.diagnostics.map(this.renderDiagnostic);
  },

  renderErrors: function renderErrors(resourceHit) {
    var xc = resourceHit.exception;
    if (!xc) {
      return false;
    }
    return React.createElement(
      "div",
      { className: "alert alert-danger", role: "alert" },
      React.createElement(
        "div",
        null,
        "Exception: ",
        xc.message
      ),
      xc.cause ? React.createElement(
        "div",
        null,
        "Caused by: ",
        xc.cause
      ) : false
    );
  },

  renderPanelBody: function renderPanelBody(resourceHit) {
    var fulllength = { width: "100%" };

    if (this.state.displayADV) {
      return React.createElement(
        "div",
        { className: "resourceResultsADV" },
        this.renderErrors(resourceHit),
        this.renderDiagnostics(resourceHit),
        React.createElement(
          "table",
          { className: "table table-condensed table-hover advanced-layers", style: fulllength },
          React.createElement(
            "tbody",
            null,
            this.renderRowsAsADVGrouped(resourceHit)
          )
        )
      );
    } else if (this.state.displayKwic) {
      return React.createElement(
        "div",
        null,
        this.renderErrors(resourceHit),
        this.renderDiagnostics(resourceHit),
        React.createElement(
          "table",
          { className: "table table-condensed table-hover kwic", style: fulllength },
          React.createElement(
            "tbody",
            null,
            resourceHit.kwics.map(this.renderRowsAsKwic)
          )
        )
      );
    } else {
      return React.createElement(
        "div",
        null,
        this.renderErrors(resourceHit),
        this.renderDiagnostics(resourceHit),
        resourceHit.kwics.map(this.renderRowsAsHits)
      );
    }
  },

  renderDisplayKWIC: function renderDisplayKWIC() {
    return React.createElement(
      "div",
      { className: "inline btn-group", style: { display: "inline-block" } },
      React.createElement(
        "label",
        { htmlFor: "inputKwic", className: "btn btn-flat" },
        this.state.displayKwic ? React.createElement("input", { id: "inputKwic", type: "checkbox", value: "kwic", checked: true, onChange: this.toggleKwic }) : React.createElement("input", { id: "inputKwic", type: "checkbox", value: "kwic", onChange: this.toggleKwic }),
        "\xA0 Display as Key Word In Context"
      )
    );
  },

  renderDisplayADV: function renderDisplayADV() {
    return React.createElement(
      "div",
      { className: "inline btn-group", style: { display: "inline-block" } },
      React.createElement(
        "label",
        { htmlFor: "inputADV", className: "btn btn-flat" },
        this.state.displayADV ? React.createElement("input", { id: "inputADV", type: "checkbox", value: "adv", checked: true, onChange: this.toggleADV }) : React.createElement("input", { id: "inputADV", type: "checkbox", value: "adv", onChange: this.toggleADV }),
        "\xA0 Display as AdvancedDataView (ADV)"
      )
    );
  },

  renderDownloadLinks: function renderDownloadLinks(resourceId) {
    return React.createElement(
      "div",
      { className: "dropdown" },
      React.createElement(
        "button",
        { className: "btn btn-flat", "aria-expanded": "false", "data-toggle": "dropdown" },
        React.createElement("span", { className: "glyphicon glyphicon-download-alt", "aria-hidden": "true" }),
        " ",
        " Download ",
        " ",
        React.createElement("span", { className: "caret" })
      ),
      React.createElement(
        "ul",
        { className: "dropdown-menu" },
        React.createElement(
          "li",
          null,
          " ",
          React.createElement(
            "a",
            { href: this.props.getDownloadLink(resourceId, "csv") },
            " ",
            " As CSV file"
          )
        ),
        React.createElement(
          "li",
          null,
          " ",
          React.createElement(
            "a",
            { href: this.props.getDownloadLink(resourceId, "ods") },
            " ",
            " As ODS file"
          )
        ),
        React.createElement(
          "li",
          null,
          " ",
          React.createElement(
            "a",
            { href: this.props.getDownloadLink(resourceId, "excel") },
            " ",
            " As Excel file"
          )
        ),
        React.createElement(
          "li",
          null,
          " ",
          React.createElement(
            "a",
            { href: this.props.getDownloadLink(resourceId, "tcf") },
            " ",
            " As TCF file"
          )
        ),
        React.createElement(
          "li",
          null,
          " ",
          React.createElement(
            "a",
            { href: this.props.getDownloadLink(resourceId, "text") },
            " ",
            " As Plain Text file"
          )
        )
      )
    );
  },

  renderToWeblichtLinks: function renderToWeblichtLinks(resourceId, forceLanguage, error) {
    return React.createElement(
      "div",
      { className: "dropdown" },
      React.createElement(
        "button",
        { className: "btn btn-flat", "aria-expanded": "false", "data-toggle": "dropdown" },
        React.createElement("span", { className: "glyphicon glyphicon-export", "aria-hidden": "true" }),
        " ",
        " Use Weblicht ",
        " ",
        React.createElement("span", { className: "caret" })
      ),
      React.createElement(
        "ul",
        { className: "dropdown-menu" },
        React.createElement(
          "li",
          null,
          error ? React.createElement(
            "div",
            { className: "alert alert-danger", style: { margin: 10, width: 200 } },
            error
          ) : React.createElement(
            "a",
            { href: this.props.getToWeblichtLink(resourceId, forceLanguage), target: "_blank" },
            " ",
            "Send to Weblicht"
          )
        )
      )
    );
  }

};

module.exports = ResultMixin;

},{"classnames":2,"prop-types":15}],53:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _resultmixin = require("./resultmixin.jsx");

var _resultmixin2 = _interopRequireDefault(_resultmixin);

var _panel = require("./panel.jsx");

var _panel2 = _interopRequireDefault(_panel);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

var _reactTransitionGroup = require("react-transition-group");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var Results = (0, _createReactClass2.default)({
  displayName: "Results",

  propTypes: {
    collhits: PT.object.isRequired,
    searchedLanguage: PT.array.isRequired,
    toggleResultModal: PT.func.isRequired,
    getDownloadLink: PT.func.isRequired,
    getToWeblichtLink: PT.func.isRequired,
    queryTypeId: PT.string.isRequired
  },
  mixins: [_resultmixin2.default],

  getInitialState: function getInitialState() {
    return {
      displayDiagnosticsForEmptyResults: false
    };
  },

  toggleDiagnosticsForEmptyResults: function toggleDiagnosticsForEmptyResults() {
    this.setState({ displayDiagnosticsForEmptyResults: !this.state.displayDiagnosticsForEmptyResults });
  },

  renderDisplayDiagnosticsForEmptyResults: function renderDisplayDiagnosticsForEmptyResults() {
    var collhits = this.props.collhits;
    if (!collhits.results) {
      return false;
    }
    var numExceptions = collhits.results.filter(function (x) {
      return !!x.exception;
    }).length;
    var numDiagnostics = collhits.results.filter(function (x) {
      return x.diagnostics.length > 0;
    }).length;
    if (numExceptions <= 0 && numDiagnostics <= 0) {
      return false;
    }

    return React.createElement(
      "div",
      { className: "inline btn-group", style: { display: "inline-block" } },
      React.createElement(
        "label",
        { htmlFor: "inputDiagnosticsForEmptyResults", className: "btn btn-flat" },
        this.state.displayDiagnosticsForEmptyResults ? React.createElement("input", { id: "inputDiagnosticsForEmptyResults", type: "checkbox", value: "kwic", checked: true, onChange: this.toggleDiagnosticsForEmptyResults }) : React.createElement("input", { id: "inputDiagnosticsForEmptyResults", type: "checkbox", value: "kwic", onChange: this.toggleDiagnosticsForEmptyResults }),
        "\xA0 Show ",
        numDiagnostics ? "warnings" : false,
        numExceptions > 0 && numDiagnostics > 0 ? " and " : false,
        numExceptions ? "errors" : false
      )
    );
  },

  renderPanelInfo: function renderPanelInfo(resourceHit) {
    var inline = { display: "inline-block" };
    return React.createElement(
      "div",
      null,
      " ",
      React.createElement(
        "div",
        { style: inline },
        React.createElement(
          "button",
          { className: "btn btn-default zoomResultButton",
            onClick: function (e) {
              this.props.toggleResultModal(e, resourceHit);
            }.bind(this) },
          React.createElement("span", { className: "glyphicon glyphicon-eye-open" }),
          " View"
        )
      )
    );
  },

  renderResultPanel: function renderResultPanel(resourceHit) {
    if (resourceHit.kwics.length === 0 && !resourceHit.exception && resourceHit.diagnostics.length === 0) {
      return false;
    }
    if (!this.state.displayDiagnosticsForEmptyResults && resourceHit.kwics.length === 0) {
      return false;
    }
    return React.createElement(
      _reactTransitionGroup.CSSTransition,
      { key: resourceHit.resource.id, classNames: "fade", timeout: { enter: 200, exit: 200 } },
      React.createElement(
        _panel2.default,
        { key: resourceHit.resource.id,
          title: this.renderPanelTitle(resourceHit.resource),
          info: this.renderPanelInfo(resourceHit) },
        this.renderPanelBody(resourceHit)
      )
    );
  },

  renderProgressMessage: function renderProgressMessage() {
    var collhits = this.props.collhits;
    var done = collhits.results.length - collhits.inProgress;
    var msg = collhits.hits + " matching resource" + (collhits.hits != 1 ? "s" : "") + " found in " + done + " searched resource" + (done != 1 ? "s" : "");
    var percents = Math.round(100 * collhits.hits / collhits.results.length);
    var styleperc = { width: percents + "%" };
    return React.createElement(
      "div",
      { style: { marginTop: 10 } },
      React.createElement(
        "div",
        null,
        msg
      ),
      collhits.inProgress > 0 ? React.createElement(
        "div",
        { className: "progress", style: { marginBottom: 10 } },
        React.createElement("div", { className: "progress-bar progress-bar-striped active", role: "progressbar",
          "aria-valuenow": percents, "aria-valuemin": "0", "aria-valuemax": "100", style: styleperc }),
        percents > 2 ? false : React.createElement("div", { className: "progress-bar progress-bar-striped active", role: "progressbar",
          "aria-valuenow": "100", "aria-valuemin": "0", "aria-valuemax": "100",
          style: { width: '100%', backgroundColor: '#888' } })
      ) : false
    );
  },

  render: function render() {
    var collhits = this.props.collhits;
    if (!collhits.results) {
      return false;
    }
    var showprogress = collhits.inProgress > 0;

    var numExceptions = collhits.results.filter(function (x) {
      return !!x.exception;
    }).length;
    var numDiagnostics = collhits.results.filter(function (x) {
      return x.diagnostics.length > 0;
    }).length;

    return React.createElement(
      "div",
      null,
      showprogress ? this.renderProgressMessage() : React.createElement("div", { style: { height: 20 } }),
      React.createElement(
        "div",
        { style: { marginBottom: 5 } },
        showprogress ? false : React.createElement(
          "div",
          { className: "float-left", style: { marginRight: "1ex" } },
          collhits.hits + " matching resource" + (collhits.hits != 1 ? "s" : "") + " found",
          React.createElement("br", null),
          collhits.results.length + " resource" + (collhits.results.length != 1 ? "s" : "") + " searched",
          numExceptions ? ", " + numExceptions + " exceptions" : false,
          numDiagnostics ? ", " + numDiagnostics + " warnings" : false
        ),
        this.renderDisplayDiagnosticsForEmptyResults(),
        collhits.hits === 0 ? false : React.createElement(
          "div",
          { className: "float-right" },
          React.createElement(
            "div",
            null,
            this.renderDisplayKWIC(),
            this.props.queryTypeId !== "fcs" ? "" : this.renderDisplayADV(),
            collhits.inProgress === 0 ? React.createElement(
              "div",
              { className: "inline" },
              " ",
              this.renderDownloadLinks(),
              " "
            ) : false
          )
        ),
        React.createElement("div", { style: { clear: 'both' } })
      ),
      React.createElement(
        _reactTransitionGroup.TransitionGroup,
        null,
        collhits.results.map(this.renderResultPanel)
      )
    );
  }
});

var _ = window._ = window._ || {
  keys: function keys() {
    var ret = [];
    for (var x in o) {
      if (o.hasOwnProperty(x)) {
        ret.push(x);
      }
    }
    return ret;
  },

  pairs: function pairs(o) {
    var ret = [];
    for (var x in o) {
      if (o.hasOwnProperty(x)) {
        ret.push([x, o[x]]);
      }
    }
    return ret;
  },

  values: function values(o) {
    var ret = [];
    for (var x in o) {
      if (o.hasOwnProperty(x)) {
        ret.push(o[x]);
      }
    }
    return ret;
  },

  uniq: function uniq(a) {
    var r = [];
    for (var i = 0; i < a.length; i++) {
      if (r.indexOf(a[i]) < 0) {
        r.push(a[i]);
      }
    }
    return r;
  }
};

module.exports = Results;

},{"./panel.jsx":49,"./resultmixin.jsx":52,"classnames":2,"create-react-class":6,"prop-types":15,"react-transition-group":30}],54:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var SearchResourceBox = (0, _createReactClass2.default)({
  displayName: "SearchResourceBox",

  //fixme! - class SearchResourceBox extends React.Component {
  propTypes: {
    search: PT.func.isRequired
  },

  getInitialState: function getInitialState() {
    return {
      query: ""
    };
  },

  handleChange: function handleChange(event) {
    var query = event.target.value;
    this.setState({ query: query });

    if (query.length === 0 || 2 <= query.length) {
      this.props.search(query);
    }
    event.stopPropagation();
  },

  handleKey: function handleKey(event) {
    if (event.keyCode == 13) {
      this.props.search(event.target.value);
    }
  },

  render: function render() {
    return React.createElement(
      "div",
      { className: "form-group" },
      React.createElement("input", { className: "form-control search search-resource", type: "text",
        value: this.state.query, placeholder: "Search for resource",
        onChange: this.handleChange })
    );
  }
});

module.exports = SearchResourceBox;

},{"classnames":2,"create-react-class":6,"prop-types":15}],55:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _resultmixin = require("./resultmixin.jsx");

var _resultmixin2 = _interopRequireDefault(_resultmixin);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

var _reactTransitionGroup = require("react-transition-group");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var ZoomedResult = (0, _createReactClass2.default)({
  displayName: "ZoomedResult",

  propTypes: {
    resourceHit: PT.object,
    nextResults: PT.func.isRequired,
    languageMap: PT.object.isRequired,
    weblichtLanguages: PT.array.isRequired,
    searchedLanguage: PT.array.isRequired,
    getDownloadLink: PT.func.isRequired,
    getToWeblichtLink: PT.func.isRequired,
    queryTypeId: PT.string.isRequired
  },
  mixins: [_resultmixin2.default],

  getInitialState: function getInitialState() {
    return {
      forceUpdate: 1 // hack to force an update, used when searching for next results
    };
  },

  nextResults: function nextResults(e) {
    this.props.resourceHit.inProgress = true;
    this.setState({ forceUpdate: this.state.forceUpdate + 1 });
    this.props.nextResults(this.props.resourceHit.resource.id);
  },

  renderLanguages: function renderLanguages(languages) {
    return languages.map(function (l) {
      return this.props.languageMap[l];
    }.bind(this)).sort().join(", ");
  },

  renderMoreResults: function renderMoreResults() {
    if (this.props.resourceHit.inProgress) return React.createElement(
      "span",
      { style: { fontStyle: 'italic' } },
      "Retrieving results, please wait..."
    );

    var moreResults = true;
    for (var i = 0; i < this.props.resourceHit.diagnostics.length; i++) {
      var d = this.props.resourceHit.diagnostics[i];
      if (d.uri === window.MyAggregator.NO_MORE_RECORDS_DIAGNOSTIC_URI) {
        moreResults = false;
        break;
      }
    }
    if (!moreResults) return React.createElement(
      "span",
      { style: { fontStyle: 'italic' } },
      "No other results available for this query"
    );
    return React.createElement(
      "button",
      { className: "btn btn-default", onClick: this.nextResults },
      React.createElement("span", { className: "glyphicon glyphicon-option-horizontal", "aria-hidden": "true" }),
      " More Results"
    );
  },

  render: function render() {
    var resourceHit = this.props.resourceHit;
    if (!resourceHit) {
      return false;
    }

    var forceLanguage = null,
        wlerror = null;
    if (this.props.weblichtLanguages.indexOf(this.props.searchedLanguage[0]) < 0) {
      // the search language is either AnyLanguage or unsupported
      if (this.props.searchedLanguage[0] === window.MyAggregator.multipleLanguageCode) {
        if (resourceHit.resource.languages && resourceHit.resource.languages.length === 1) {
          forceLanguage = resourceHit.resource.languages[0];
        } else {
          var langs = resourceHit.kwics.map(function (kwic) {
            return kwic.language;
          });
          langs = _.uniq(langs.filter(function (l) {
            return l !== null;
          }));
          if (langs.length === 1) {
            forceLanguage = langs[0];
          }
        }
      }
      if (!forceLanguage) {
        wlerror = "Cannot use WebLicht: unsupported language (" + this.props.searchedLanguage[1] + ")";
      }
    }
    var resource = resourceHit.resource;
    return React.createElement(
      "div",
      null,
      React.createElement(
        "div",
        { className: "resourceDescription" },
        React.createElement(
          "p",
          null,
          React.createElement("i", { className: "fa fa-institution" }),
          " ",
          resource.institution
        ),
        resource.description ? React.createElement(
          "p",
          null,
          React.createElement("i", { className: "glyphicon glyphicon-info-sign" }),
          " ",
          resource.description
        ) : false,
        React.createElement(
          "p",
          null,
          React.createElement("i", { className: "fa fa-language" }),
          " ",
          this.renderLanguages(resource.languages)
        )
      ),
      React.createElement(
        "div",
        { style: { marginBottom: 2 } },
        React.createElement(
          "div",
          { className: "float-right" },
          React.createElement(
            "div",
            null,
            this.renderDisplayKWIC(),
            this.props.queryTypeId !== "fcs" ? "" : this.renderDisplayADV(),
            React.createElement(
              "div",
              { className: "inline" },
              " ",
              this.renderDownloadLinks(resourceHit.resource.id),
              " "
            ),
            React.createElement(
              "div",
              { className: "inline" },
              " ",
              this.renderToWeblichtLinks(resource.id, forceLanguage, wlerror),
              " "
            )
          )
        ),
        React.createElement("div", { style: { clear: 'both' } })
      ),
      React.createElement(
        _reactTransitionGroup.TransitionGroup,
        null,
        React.createElement(
          _reactTransitionGroup.CSSTransition,
          { classNames: "fade", timeout: { enter: 200, exit: 200 } },
          React.createElement(
            "div",
            { className: "panel" },
            React.createElement(
              "div",
              { className: "panel-body resourceResults" },
              this.renderPanelBody(resourceHit)
            )
          )
        )
      ),
      React.createElement(
        "div",
        { style: { textAlign: 'center', marginTop: 10 } },
        this.renderMoreResults()
      )
    );
  }
});

module.exports = ZoomedResult;

},{"./resultmixin.jsx":52,"classnames":2,"create-react-class":6,"prop-types":15,"react-transition-group":30}],56:[function(require,module,exports){
"use strict";

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var _aboutpage = require("./pages/aboutpage.jsx");

var _aboutpage2 = _interopRequireDefault(_aboutpage);

var _aggregatorpage = require("./pages/aggregatorpage.jsx");

var _aggregatorpage2 = _interopRequireDefault(_aggregatorpage);

var _helppage = require("./pages/helppage.jsx");

var _helppage2 = _interopRequireDefault(_helppage);

var _statisticspage = require("./pages/statisticspage.jsx");

var _statisticspage2 = _interopRequireDefault(_statisticspage);

var _alertpane = require("./components/alertpane.jsx");

var _alertpane2 = _interopRequireDefault(_alertpane);

var _footer = require("./components/footer.jsx");

var _footer2 = _interopRequireDefault(_footer);

var _embeddedfooter = require("./components/embeddedfooter.jsx");

var _embeddedfooter2 = _interopRequireDefault(_embeddedfooter);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

(function () {
  "use strict";

  window.MyAggregator = window.MyAggregator || {};
  window._paq = window._paq || [];

  var VERSION = window.MyAggregator.VERSION = "v.3.13.0";

  // TODO: set this via environment variables at build time (envify)
  var URLROOT = window.MyAggregator.URLROOT = "";
  var APIROOT = window.MyAggregator.APIROOT = "rest/";
  var CURURL = (document.location || window.location).href;

  var PT = _propTypes2.default;

  /**
  The FCS Aggregator UI is based on reactjs.
  - index.html: describes the general page structure, with a push-down footer;
    on that structure the Main and Footer components are plugged.
  - main.jsx: composes the simple top components (Main, AggregatorPage, HelpPage, 
    AboutPage, StatisticsPage) in pages/
  - pages/aggregatorpage.jsx: defines
      - the Corpora store of resources
      - the AggregatorPage component which deals with search and displays the search results
  - components/resourceview.jsx: defines the ResourceView, rendered when the user views the available resources
  - plus in components/: various general usage React components
  
  The top-most component, Main, tracks of the window's location URL and, depending on the value,
    renders various components inside its frame:
      - AggregatorPage is the view corresponding to the normal search UI (search bar and all)
        This is the most complex component.
      - HelpPage renders the help page
      - AboutPage renders the about page
      - StatisticsPage renders the stats page
      - another URL, /Aggregator/embed, determines Main and AggregatorPage to render just the search bar.
        The embedded view is supposed to work like a YouTube embedded clip.
  */

  var Main = (0, _createReactClass2.default)({
    displayName: "Main",

    // fixme! - class Main extends React.Component {
    componentWillMount: function componentWillMount() {
      routeFromLocation.bind(this)();
    },

    getInitialState: function getInitialState() {
      return {
        navbarCollapse: false,
        navbarPageFn: this.renderAggregator,
        alerts: [], // messages (info/error)
        initialSearchId: null // search id extracted from URL
      };
    },

    error: function error(errObj) {
      var err = "";
      if (typeof errObj === 'string' || errObj instanceof String) {
        err = errObj;
      } else if ((typeof errObj === "undefined" ? "undefined" : _typeof(errObj)) === 'object' && errObj.statusText) {
        console.log("ERROR: jqXHR = ", errObj);
        err = errObj.statusText;
      } else {
        return;
      }
      this.alert(err, "error");
    },

    info: function info(msgObj) {
      var msg = "";
      if (typeof msgObj === 'string' || msgObj instanceof String) {
        msg = msgObj;
      } else if ((typeof msgObj === "undefined" ? "undefined" : _typeof(msgObj)) === 'object') {
        console.log("INFO: obj = ", msgObj);
        msg = JSON.stringify(msgObj);
      } else {
        return;
      }
      this.alert(msg, "info");
    },

    alert: function alert(message, type) {
      var that = this;
      var alerts = this.state.alerts.slice();
      alerts.push({ msg: message, type: type });
      this.setState({ alerts: alerts });

      setTimeout(function () {
        var alerts = that.state.alerts.slice();
        alerts.shift();
        that.setState({ alerts: alerts });
      }, 10000);
    },

    ajax: function ajax(ajaxObject) {
      var that = this;
      if (!ajaxObject.error) {
        ajaxObject.error = function (jqXHR, textStatus, error) {
          if (jqXHR.readyState === 0) {
            that.error("Network error, please check your internet connection");
          } else if (jqXHR.responseText) {
            that.error(jqXHR.responseText + " (" + error + ")");
          } else {
            that.error(error + " (" + textStatus + ")");
          }
          console.log("ajax error, jqXHR: ", jqXHR);
        };
      }
      // console.log("ajax", ajaxObject);
      jQuery.ajax(ajaxObject);
    },

    toggleCollapse: function toggleCollapse() {
      this.setState({ navbarCollapse: !this.state.navbarCollapse });
    },

    renderAggregator: function renderAggregator() {
      return React.createElement(_aggregatorpage2.default, { APIROOT: APIROOT, ajax: this.ajax, error: this.error, info: this.info, embedded: false, searchId: this.state.initialSearchId });
    },

    renderHelp: function renderHelp() {
      return React.createElement(_helppage2.default, null);
    },

    renderAbout: function renderAbout() {
      return React.createElement(_aboutpage2.default, { toStatistics: this.toStatistics });
    },

    renderStatistics: function renderStatistics() {
      return React.createElement(_statisticspage2.default, { APIROOT: APIROOT, ajax: this.ajax });
    },

    renderEmbedded: function renderEmbedded() {
      return React.createElement(_aggregatorpage2.default, { APIROOT: APIROOT, ajax: this.ajax, error: this.error, embedded: true });
    },

    getPageFns: function getPageFns() {
      return {
        '': this.renderAggregator,
        'help': this.renderHelp,
        'about': this.renderAbout,
        'stats': this.renderStatistics,
        'embed': this.renderEmbedded
      };
    },

    gotoPage: function gotoPage(doPushHistory, pageFnName) {
      var pageFn = this.getPageFns()[pageFnName];
      if (this.state.navbarPageFn !== pageFn) {
        if (doPushHistory) {
          window.history.pushState({ page: pageFnName }, '', URLROOT + "/" + pageFnName);
        }
        this.setState({ navbarPageFn: pageFn });
        console.log("new page: " + document.location + ", name: " + pageFnName);

        _paq.push(['setReferrerUrl', CURURL]);
        CURURL = (document.location || window.location).pathname;
        _paq.push(['setCustomUrl', CURURL]);
        _paq.push(['trackPageView']);
      }
    },

    toAggregator: function toAggregator(doPushHistory) {
      this.gotoPage(doPushHistory, '');
    },
    toHelp: function toHelp(doPushHistory) {
      this.gotoPage(doPushHistory, 'help');
    },
    toAbout: function toAbout(doPushHistory) {
      this.gotoPage(doPushHistory, 'about');
    },
    toStatistics: function toStatistics(doPushHistory) {
      this.gotoPage(doPushHistory, 'stats');
    },
    toEmbedded: function toEmbedded(doPushHistory) {
      this.gotoPage(doPushHistory, 'embed');
    },

    renderLogin: function renderLogin() {
      return false;
      // return  <li className="unauthenticated">
      // 			<a href="login" tabIndex="-1"><span className="glyphicon glyphicon-log-in"></span> LOGIN</a>
      // 		</li>;
    },

    renderCollapsible: function renderCollapsible() {
      var classname = "navbar-collapse collapse " + (this.state.navbarCollapse ? "in" : "");
      return React.createElement(
        "div",
        { className: classname },
        React.createElement(
          "ul",
          { className: "nav navbar-nav" },
          React.createElement(
            "li",
            { className: this.state.navbarPageFn === this.renderAggregator ? "active" : "" },
            React.createElement(
              "a",
              { className: "link", tabIndex: "-1", onClick: this.toAggregator.bind(this, true) },
              "Aggregator"
            )
          ),
          React.createElement(
            "li",
            { className: this.state.navbarPageFn === this.renderHelp ? "active" : "" },
            React.createElement(
              "a",
              { className: "link", tabIndex: "-1", onClick: this.toHelp.bind(this, true) },
              "Help"
            )
          )
        ),
        React.createElement(
          "ul",
          { className: "nav navbar-nav navbar-right" },
          React.createElement(
            "li",
            null,
            " ",
            React.createElement("div", { id: "clarinservices", style: { padding: 4, paddingTop: 8 } }),
            " "
          ),
          this.renderLogin()
        )
      );
    },

    renderTop: function renderTop() {
      if (this.state.navbarPageFn === this.renderEmbedded) {
        return false;
      }
      return React.createElement(
        "div",
        null,
        React.createElement(
          "div",
          { className: "navbar navbar-default navbar-static-top", role: "navigation" },
          React.createElement(
            "div",
            { className: "container" },
            React.createElement(
              "div",
              { className: "navbar-header" },
              React.createElement(
                "button",
                { type: "button", className: "navbar-toggle", onClick: this.toggleCollapse },
                React.createElement(
                  "span",
                  { className: "sr-only" },
                  "Toggle navigation"
                ),
                React.createElement("span", { className: "icon-bar" }),
                React.createElement("span", { className: "icon-bar" }),
                React.createElement("span", { className: "icon-bar" })
              ),
              React.createElement(
                "a",
                { className: "navbar-brand", href: URLROOT + "/", tabIndex: "-1" },
                React.createElement("img", { width: "28px", height: "28px", src: "img/magglass1.png" }),
                React.createElement(
                  "header",
                  { className: "inline" },
                  " Content Search "
                )
              )
            ),
            this.renderCollapsible()
          )
        ),
        React.createElement(_alertpane2.default, { alerts: this.state.alerts })
      );
    },

    render: function render() {
      return React.createElement(
        "div",
        null,
        React.createElement(
          "div",
          null,
          " ",
          this.renderTop(),
          " "
        ),
        React.createElement(
          "div",
          { id: "push" },
          React.createElement(
            "div",
            { className: "container" },
            this.state.navbarPageFn()
          ),
          React.createElement("div", { className: "top-gap" })
        )
      );
    }
  });

  // StatisticsPage

  // HelpPage

  // AboutPage

  // Footer

  // EmbeddedFooter

  function isEmbeddedView() {
    var path = window.location.pathname.split('/');
    return path.length >= 3 && path[path.length - 1] === 'embed';
  }

  function endsWith(str, suffix) {
    return str.indexOf(suffix, str.length - suffix.length) !== -1;
  }

  var routeFromLocation = function routeFromLocation() {
    var url = document.location || window.location;
    console.log("routeFromLocation: " + url);
    if (!this) throw "routeFromLocation must be bound to main";
    var path = url.pathname.slice(URLROOT.length).split('/').slice(1);
    console.log("path: " + path);
    var pageFnName = url.pathname.slice(URLROOT.length).replace(/^\/+/, "");
    console.log("pageFnName: " + pageFnName);
    if (pageFnName === 'help') {
      this.toHelp(false);
    } else if (pageFnName === 'about') {
      this.toAbout(false);
    } else if (pageFnName === 'stats') {
      this.toStatistics(false);
    } else if (pageFnName === 'embed') {
      this.toEmbedded(false);
    } else if (pageFnName.startsWith("search-")) {
      var searchId = pageFnName.substring(7);
      this.setState({ initialSearchId: searchId });
      this.toAggregator(false);
    } else {
      this.toAggregator(false);
    }
  };

  var main = ReactDOM.render(React.createElement(Main, null), document.getElementById('body'));
  if (!isEmbeddedView()) {
    ReactDOM.render(React.createElement(_footer2.default, { VERSION: VERSION, toAbout: main.toAbout }), document.getElementById('footer'));
  } else {
    ReactDOM.render(React.createElement(_embeddedfooter2.default, { URLROOT: URLROOT }), document.getElementById('footer'));
    if (jQuery) {
      jQuery('body, #footer').addClass('embedded');
    }
  }

  window.onpopstate = routeFromLocation.bind(main);
})();

},{"./components/alertpane.jsx":42,"./components/embeddedfooter.jsx":44,"./components/footer.jsx":45,"./pages/aboutpage.jsx":57,"./pages/aggregatorpage.jsx":58,"./pages/helppage.jsx":59,"./pages/statisticspage.jsx":60,"create-react-class":6,"prop-types":15}],57:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var AboutPage = (0, _createReactClass2.default)({
  displayName: "AboutPage",

  //fixme! - class AboutPage extends React.Component { 
  propTypes: {
    toStatistics: PT.func.isRequired
  },

  toStatistics: function toStatistics(e) {
    this.props.toStatistics(true);
    e.preventDefault();
    e.stopPropagation();
  },

  render: function render() {
    return React.createElement(
      "div",
      null,
      React.createElement(
        "div",
        { className: "top-gap" },
        React.createElement(
          "h1",
          { style: { padding: 15 } },
          "About"
        ),
        React.createElement(
          "div",
          { className: "col-md-6" },
          React.createElement(
            "h3",
            null,
            "People"
          ),
          React.createElement(
            "ul",
            null,
            React.createElement(
              "li",
              null,
              "Emanuel Dima"
            ),
            React.createElement(
              "li",
              null,
              "Erik K\xF6rner"
            ),
            React.createElement(
              "li",
              null,
              "Leif-J\xF6ran Olsson"
            ),
            React.createElement(
              "li",
              null,
              "Yana Panchenko"
            ),
            React.createElement(
              "li",
              null,
              "Oliver Schonefeld"
            ),
            React.createElement(
              "li",
              null,
              "Dieter Van Uytvanck"
            )
          ),
          React.createElement(
            "h3",
            null,
            "Statistics"
          ),
          React.createElement(
            "button",
            { type: "button", className: "btn btn-default btn-lg", onClick: this.toStatistics },
            React.createElement(
              "span",
              { className: "glyphicon glyphicon-cog", "aria-hidden": "true" },
              " "
            ),
            " ",
            "View server log"
          )
        ),
        React.createElement(
          "div",
          { className: "col-md-6" },
          React.createElement(
            "h3",
            null,
            "Technology"
          ),
          React.createElement(
            "p",
            null,
            "The Aggregator uses the following software components:"
          ),
          React.createElement(
            "ul",
            null,
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "http://dropwizard.io/" },
                "Dropwizard"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "http://www.apache.org/licenses/LICENSE-2.0" },
                "Apache License 2.0"
              ),
              ")"
            ),
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "http://eclipse.org/jetty/" },
                "Jetty"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "http://www.apache.org/licenses/LICENSE-2.0" },
                "Apache License 2.0"
              ),
              ")"
            ),
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "http://jackson.codehaus.org/" },
                "Jackson"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "http://www.apache.org/licenses/LICENSE-2.0" },
                "Apache License 2.0"
              ),
              ")"
            ),
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "https://jersey.java.net/" },
                "Jersey"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "https://jersey.java.net/license.html#/cddl" },
                "CCDL 1.1"
              ),
              ")"
            ),
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "https://github.com/optimaize/language-detector" },
                "Optimaize Language Detector"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "http://www.apache.org/licenses/LICENSE-2.0" },
                "Apache License 2.0"
              ),
              ")"
            ),
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "http://poi.apache.org/" },
                "Apache POI"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "http://www.apache.org/licenses/LICENSE-2.0" },
                "Apache License 2.0"
              ),
              ")"
            ),
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "http://jopendocument.org/" },
                "jOpenDocument"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "http://www.gnu.org/licenses/gpl-3.0.txt" },
                "GPL 3.0"
              ),
              ")"
            )
          ),
          React.createElement(
            "ul",
            null,
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "http://facebook.github.io/react/" },
                "React"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "https://github.com/facebook/react/blob/master/LICENSE" },
                "MIT license"
              ),
              ")"
            ),
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "http://getbootstrap.com/" },
                "Bootstrap"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "http://opensource.org/licenses/mit-license.html" },
                "MIT license"
              ),
              ")"
            ),
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "http://jquery.com/" },
                "jQuery"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "http://opensource.org/licenses/mit-license.html" },
                "MIT license"
              ),
              ")"
            ),
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "http://glyphicons.com/" },
                "GLYPHICONS free"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "https://creativecommons.org/licenses/by/3.0/" },
                "CC-BY 3.0"
              ),
              ")"
            ),
            React.createElement(
              "li",
              null,
              React.createElement(
                "a",
                { href: "http://fortawesome.github.io/Font-Awesome/" },
                "FontAwesome"
              ),
              " ",
              "(",
              React.createElement(
                "a",
                { href: "http://opensource.org/licenses/mit-license.html" },
                "MIT"
              ),
              ", ",
              React.createElement(
                "a",
                { href: "http://scripts.sil.org/OFL" },
                "SIL Open Font License"
              ),
              ")"
            )
          ),
          React.createElement(
            "p",
            null,
            "The federated content search icon is made by",
            React.createElement(
              "a",
              { href: "http://www.freepik.com", title: "Freepik" },
              " Freepik "
            ),
            "from",
            React.createElement(
              "a",
              { href: "http://www.flaticon.com", title: "Flaticon" },
              " www.flaticon.com "
            ),
            "and licensed under",
            React.createElement(
              "a",
              { href: "http://creativecommons.org/licenses/by/3.0/", title: "Creative Commons BY 3.0" },
              " CC BY 3.0 "
            )
          )
        )
      )
    );
  }
});

module.exports = AboutPage;

},{"classnames":2,"create-react-class":6,"prop-types":15}],58:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _resourceview = require("../components/resourceview.jsx");

var _resourceview2 = _interopRequireDefault(_resourceview);

var _languageselector = require("../components/languageselector.jsx");

var _languageselector2 = _interopRequireDefault(_languageselector);

var _modal = require("../components/modal.jsx");

var _modal2 = _interopRequireDefault(_modal);

var _results = require("../components/results.jsx");

var _results2 = _interopRequireDefault(_results);

var _queryinput = require("../components/queryinput.jsx");

var _queryinput2 = _interopRequireDefault(_queryinput);

var _zoomedresult = require("../components/zoomedresult.jsx");

var _zoomedresult2 = _interopRequireDefault(_zoomedresult);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

window.MyAggregator = window.MyAggregator || {};
var multipleLanguageCode = window.MyAggregator.multipleLanguageCode = "mul"; // see ISO-693-3

var AggregatorPage = (0, _createReactClass2.default)({
  displayName: "AggregatorPage",

  // fixme! - class AggregatorPage extends React.Component {
  propTypes: {
    APIROOT: PT.string.isRequired,
    ajax: PT.func.isRequired,
    error: PT.func.isRequired,
    info: PT.func.isRequired,
    embedded: PT.bool.isRequired,
    searchId: PT.string
  },

  nohits: {
    results: null
  },
  anyLanguage: [multipleLanguageCode, "Any Language"],

  getInitialState: function getInitialState() {
    var aggrContext = getQueryVariable('x-aggregation-context');
    aggrContext = aggrContext && JSON.parse(aggrContext);

    return {
      resources: new Resources([], this.updateResources),
      languageMap: {},
      weblichtLanguages: [],
      queryTypeId: getQueryVariable('queryType') || 'cql',
      cqlQuery: (getQueryVariable('queryType') || 'cql') === 'cql' && getQueryVariable('query') || '',
      fcsQuery: (getQueryVariable('queryType') || 'cql') === 'fcs' && getQueryVariable('query') || '',
      aggregationContext: aggrContext || null,
      language: this.anyLanguage,
      languageFilter: 'byMeta',
      numberOfResults: 10,

      searchId: this.props.searchId,
      timeout: 0,
      hits: this.nohits,

      zoomedResourceHit: null
    };
  },

  componentDidMount: function componentDidMount() {
    this._isMounted = true;

    this.props.ajax({
      url: this.props.APIROOT + 'init',
      success: function (json, textStatus, jqXHR) {
        if (this._isMounted) {
          var resources = new Resources(json.resources, this.updateResources);

          // // for testing aggregation context
          // json['x-aggregation-context'] = {
          // 	'EKUT': ["http://hdl.handle.net/11858/00-1778-0000-0001-DDAF-D"]
          // };

          var aggregationContext = json['x-aggregation-context'] || this.state.aggregationContext;

          window.MyAggregator.mode = getQueryVariable('mode') || json.mode;
          window.MyAggregator.resources = json.resources;
          window.MyAggregator.xAggregationContext = aggregationContext;

          // Setting visibility, e.g. only resources 
          // from v2.0 endpoints for fcs v2.0
          resources.setVisibility(this.state.queryTypeId, this.state.language[0]);

          if (aggregationContext) {
            var contextResourcesInfo = resources.setAggregationContext(aggregationContext);
            var unavailableResourcesHandles = contextResourcesInfo.unavailable; // list of unavailable aggregationContext
            if (unavailableResourcesHandles.length > 0) {
              this.props.error("Could not find requested resource handles:\n" + unavailableResourcesHandles.join('\n'));
            }

            var actuallySelectedResources = resources.getSelectedIds();

            if (contextResourcesInfo.selected.length !== actuallySelectedResources.length) {
              if (actuallySelectedResources.length === 0) {
                this.props.error("This search does not support the required resource(s), will search all resources instead"); // TODO give detailed reason its not supported.
                resources.recurse(function (resource) {
                  resource.selected = true;
                });
              } else {
                var err = "Some required context resources are not supported for this search:\n";
                err = err + contextResourcesInfo.selected.filter(function (r) {
                  if (actuallySelectedResources.indexOf(r.id) === -1) {
                    console.warn("Requested resource but not available for selection", r);
                    return true;
                  }
                  return false;
                }).map(function (r) {
                  return r.title;
                }).join('\n');
                this.props.error(err);
              }
            } else if (contextResourcesInfo.selected.length > 0) {
              this.props.info("Pre-selected " + contextResourcesInfo.selected.length + " resource" + (contextResourcesInfo.selected.length != 1 ? "s" : "") + ":\n" + contextResourcesInfo.selected.map(function (x) {
                return x.title + " (" + x.handle + ")";
              }).join('\n'));
            }
          } else {
            // no context set all visibl to selected as default.
            console.log("no context set, selecting all available");
            resources.recurse(function (r) {
              r.visible ? r.selected = true : null;
            });
          }

          this.setState({
            resources: resources,
            languageMap: json.languages,
            weblichtLanguages: json.weblichtLanguages,
            aggregationContext: aggregationContext
          }, this.postInit);
        } else {
          console.warn("Got Aggregator init response, but not mounted!");
        }

        // load old search state if provided and possible
        if (this.state.searchId != null) {
          console.log("Try loading exiting search, from searchId provided from URL:", this.state.searchId);
          this.refreshSearchResults();
          this.setResourceSelectionBySearch();
        }
      }.bind(this)
    });
  },

  postInit: function postInit() {
    if (window.MyAggregator.mode === 'search') {
      this.search();
    }
  },


  updateResources: function updateResources(resources) {
    this.setState({ resources: resources });
  },

  getCurrentQuery: function getCurrentQuery() {
    return this.getCurrentQueryByQueryTypeId(this.state.queryTypeId);
  },


  getCurrentQueryByQueryTypeId: function getCurrentQueryByQueryTypeId(queryTypeId) {
    if (queryTypeId === 'fcs') {
      return this.state.fcsQuery;
    } else {
      return this.state.cqlQuery;
    }
  },

  search: function search() {
    var query = this.getCurrentQuery();
    var queryTypeId = this.state.queryTypeId;
    if (!query || this.props.embedded && window.MyAggregator.mode !== 'search') {
      this.setState({ hits: this.nohits, searchId: null });
      return;
    }
    var selectedIds = this.state.resources.getSelectedIds();
    if (!selectedIds.length) {
      this.props.error("Please select a resource to search into");
      return;
    }

    // console.log("searching in the following resources:", selectedIds);
    // console.log("searching with queryType:", queryTypeId);
    this.props.ajax({
      url: this.props.APIROOT + 'search',
      type: "POST",
      data: {
        query: query,
        queryType: queryTypeId,
        language: this.state.language[0],
        numberOfResults: this.state.numberOfResults,
        resourceIds: selectedIds
      },
      success: function (searchId, textStatus, jqXHR) {
        // console.log("search ["+query+"] ok: ", searchId, jqXHR);
        //Piwik.getAsyncTracker().trackSiteSearch(query, queryTypeId);
        _paq.push(['trackSiteSearch', query, queryTypeId, false]);

        var timeout = 250;
        setTimeout(this.refreshSearchResults, timeout);
        this.setState({ searchId: searchId, timeout: timeout });
        // TODO: replace url with getSearchPermaLink() ?
      }.bind(this)
    });
  },


  nextResults: function nextResults(resourceId) {
    // console.log("searching next results in resource:", resourceId);
    this.props.ajax({
      url: this.props.APIROOT + 'search/' + this.state.searchId,
      type: "POST",
      data: {
        resourceId: resourceId,
        numberOfResults: this.state.numberOfResults
      },
      success: function (searchId, textStatus, jqXHR) {
        // console.log("search ["+query+"] ok: ", searchId, jqXHR);
        var timeout = 250;
        setTimeout(this.refreshSearchResults, timeout);
        this.setState({ searchId: searchId, timeout: timeout });
      }.bind(this)
    });
  },

  refreshSearchResults: function refreshSearchResults() {
    if (!this.state.searchId || !this._isMounted) {
      return;
    }
    this.props.ajax({
      url: this.props.APIROOT + 'search/' + this.state.searchId,
      success: function (json, textStatus, jqXHR) {
        var timeout = this.state.timeout;
        if (json.inProgress) {
          if (timeout < 10000) {
            timeout = 1.5 * timeout;
          }
          setTimeout(this.refreshSearchResults, timeout);
          // console.log("new search in: " + this.timeout + "ms");
        } else {
          console.log("search ended; hits:", json);
        }
        var resourceHit = this.state.zoomedResourceHit;
        if (resourceHit) {
          for (var resi = 0; resi < json.results.length; resi++) {
            var res = json.results[resi];
            if (res.resource.id === resourceHit.resource.id) {
              resourceHit = res;
              break;
            }
          }
        }
        this.setState({ hits: json, timeout: timeout, zoomedResourceHit: resourceHit });
      }.bind(this)
    });
  },

  setResourceSelectionBySearch: function setResourceSelectionBySearch() {
    if (!this.state.searchId || !this._isMounted) {
      return;
    }
    this.props.ajax({
      url: this.props.APIROOT + 'search/' + this.state.searchId,
      success: function (json, textStatus, jqXHR) {
        var resourceIds = [];
        for (var resi = 0; resi < json.results.length; resi++) {
          var res = json.results[resi];
          resourceIds.push(res.resource.id);
        }
        this.state.resources.recurse(function (c) {
          c.selected = resourceIds.includes(c.id);
        });
        this.setState({ resources: this.state.resources });
      }.bind(this)
    });
  },

  getExportParams: function getExportParams(resourceId, format, filterLanguage) {
    var params = resourceId ? { resourceId: resourceId } : {};
    if (format) params.format = format;
    if (filterLanguage) {
      params.filterLanguage = filterLanguage;
    } else if (this.state.languageFilter === 'byGuess' || this.state.languageFilter === 'byMetaAndGuess') {
      params.filterLanguage = this.state.language[0];
    }
    return encodeQueryData(params);
  },

  getDownloadLink: function getDownloadLink(resourceId, format) {
    return this.props.APIROOT + 'search/' + this.state.searchId + '/download?' + this.getExportParams(resourceId, format);
  },

  getToWeblichtLink: function getToWeblichtLink(resourceId, forceLanguage) {
    return this.props.APIROOT + 'search/' + this.state.searchId + '/toWeblicht?' + this.getExportParams(resourceId, null, forceLanguage);
  },

  setLanguageAndFilter: function setLanguageAndFilter(languageObj, languageFilter) {
    this.state.resources.setVisibility(this.state.queryTypeId, languageFilter === 'byGuess' ? multipleLanguageCode : languageObj[0]);
    this.setState({
      language: languageObj,
      languageFilter: languageFilter,
      resources: this.state.resources // === this.state.resources.update();
    });
  },

  setQueryType: function setQueryType(queryTypeId) {
    this.state.resources.setVisibility(queryTypeId, this.state.language[0]);
    setQueryVariable('queryType', queryTypeId);
    setQueryVariable('query', this.getCurrentQueryByQueryTypeId(queryTypeId));
    this.setState({
      queryTypeId: queryTypeId,
      hits: this.nohits,
      searchId: null
    });
  },

  setNumberOfResults: function setNumberOfResults(e) {
    var n = e.target.value;
    if (n < 10) n = 10;
    if (n > 250) n = 250;
    this.setState({ numberOfResults: n });
    e.preventDefault();
    e.stopPropagation();
  },

  stop: function stop(e) {
    e.stopPropagation();
  },

  filterResults: function filterResults() {
    var noLangFiltering = this.state.languageFilter === 'byMeta';
    var langCode = this.state.language[0];
    var results = null,
        inProgress = 0,
        hits = 0;
    if (this.state.hits.results) {
      results = this.state.hits.results.map(function (resourceHit) {
        return {
          resource: resourceHit.resource,
          inProgress: resourceHit.inProgress,
          exception: resourceHit.exception,
          diagnostics: resourceHit.diagnostics,
          kwics: noLangFiltering ? resourceHit.kwics : resourceHit.kwics.filter(function (kwic) {
            return kwic.language === langCode || langCode === multipleLanguageCode || langCode === null;
          }),
          advancedLayers: noLangFiltering ? resourceHit.advancedLayers : resourceHit.advancedLayers.filter(function (layers) {
            return layers.every(function (layer) {
              return layer.language === langCode || langCode === multipleLanguageCode || langCode === null;
            });
          })
        };
      });
      for (var i = 0; i < results.length; i++) {
        var result = results[i];
        if (result.inProgress) {
          inProgress++;
        }
        if (result.kwics.length > 0) {
          hits++;
        }
      }
    }
    return {
      results: results,
      hits: hits,
      inProgress: inProgress
    };
  },

  toggleLanguageSelection: function toggleLanguageSelection(e) {
    $(ReactDOM.findDOMNode(this.refs.languageModal)).modal();
    e.preventDefault();
    e.stopPropagation();
  },

  toggleResourceSelection: function toggleResourceSelection(e) {
    $(ReactDOM.findDOMNode(this.refs.resourcesModal)).modal();
    e.preventDefault();
    e.stopPropagation();
  },

  toggleResultModal: function toggleResultModal(e, resourceHit) {
    $(ReactDOM.findDOMNode(this.refs.resultModal)).modal();
    this.setState({ zoomedResourceHit: resourceHit });
    e.preventDefault();
    e.stopPropagation();
  },

  onQueryChange: function onQueryChange(queryStr) {
    if (this.state.queryTypeId === 'cql') {
      this.setState({
        cqlQuery: queryStr || ''
      });
    } else {
      this.setState({
        fcsQuery: queryStr || ''
      });
    }
    setQueryVariable('query', queryStr);
  },

  handleKey: function handleKey(event) {
    if (event.keyCode == 13) {
      this.search();
    }
  },

  copyToClipboard: function copyToClipboard(text) {
    if (!navigator.clipboard) {
      console.warn("Failed to copy to clipboard!");
      return;
    }
    navigator.clipboard.writeText(text).then(function () {
      console.log("Async: Copying to clipboard was successful!");
      _paq.push(['trackEvent', 'Search', 'CopyToClipboardClick', text]);
    }, function (err) {
      console.error("Async: Could not copy text: ", err);
    });
  },

  copyToClipboardInputHandler: function copyToClipboardInputHandler(event) {
    var text = event.target.value;
    _paq.push(['trackEvent', 'Search', 'CopyToClipboardMouse', text]);
  },

  renderZoomedResultTitle: function renderZoomedResultTitle(resourceHit) {
    if (!resourceHit) return React.createElement("span", null);
    var resource = resourceHit.resource;
    return React.createElement(
      "h3",
      { style: { fontSize: '1em' } },
      resource.title,
      resource.landingPage ? React.createElement(
        "a",
        { href: resource.landingPage, onClick: this.stop, style: { fontSize: 12 } },
        React.createElement(
          "span",
          null,
          " \u2013 Homepage "
        ),
        React.createElement("i", { className: "glyphicon glyphicon-home" })
      ) : false
    );
  },

  getSearchPermaLink: function getSearchPermaLink() {
    //var query = getQueryVariable('query');
    //var query = this.getCurrentQueryByQueryTypeId(queryTypeId)
    var query = this.getCurrentQuery();
    var queryTypeId = this.state.queryTypeId;

    //var tempUrl = window.location.origin + window.location.pathname + "/search-" + this.state.searchId;
    //window.history.replaceState(window.history.state, null, tempUrl);
    //setQueryVariable('queryType', queryTypeId);
    //setQueryVariable('query', query);        
    //var url = window.location.toString();
    var url = window.location.origin + '/' + (!!window.MyAggregator.URLROOT.length ? window.MyAggregator.URLROOT + '/' : '') + "search-" + this.state.searchId + '?' + encodeQueryData({ queryType: queryTypeId, query: query });
    return url;
  },

  renderSearchPermaLink: function renderSearchPermaLink() {
    // DEBUG (only?): if not enable, do not show link
    if (!window.MyAggregator.showSearchResultLink) {
      return false;
    }
    // if no searchId then also do not show
    if (this.state.searchId === null) {
      return false;
    }
    var url = this.getSearchPermaLink();
    return React.createElement(
      "div",
      { className: "input-group input-group-sm col-md-4", title: "NOTE: URL to search results is not permanent. This should not be used in publications or similar. It acts more like a short-term share link with limited life-span.", style: { float: "right" } },
      React.createElement(
        "span",
        { className: "input-group-addon" },
        "Search Result Link"
      ),
      React.createElement("input", { type: "text", readOnly: true, value: url, onCopy: this.copyToClipboardInputHandler, id: "search-perma-link", className: "form-control input-sm search" }),
      React.createElement(
        "div",
        { className: "input-group-btn" },
        React.createElement(
          "button",
          { className: "btn btn-default input-sm image_button", type: "button", onClick: this.copyToClipboard.bind(this, url) },
          React.createElement("i", { className: "glyphicon glyphicon-copy" })
        )
      )
    );
  },

  renderSearchButtonOrLink: function renderSearchButtonOrLink() {
    if (this.props.embedded) {
      var query = this.getCurrentQuery();
      var queryTypeId = this.state.queryTypeId;
      var btnClass = (0, _classnames2.default)({
        'btn': true,
        'btn-default': queryTypeId === 'cql',
        'btn-primary': true,
        'input-lg': true
      });
      var newurl = !query ? "#" : window.MyAggregator.URLROOT + (this.props.embedded ? "/embed" : "/") + "?" + encodeQueryData({ queryType: queryTypeId, query: query, mode: 'search' });
      return React.createElement(
        "a",
        { className: btnClass, style: { paddingTop: 13 },
          type: "button", target: "_blank", href: newurl },
        React.createElement("i", { className: "glyphicon glyphicon-search" })
      );
    }
    return React.createElement(
      "button",
      { className: "btn btn-default input-lg image_button", type: "button", onClick: this.search },
      React.createElement("i", { className: "glyphicon glyphicon-search" })
    );
  },

  renderQueryInput: function renderQueryInput() {
    var queryType = queryTypeMap[this.state.queryTypeId];
    return React.createElement(_queryinput2.default, {
      searchedLanguages: this.state.searchedLanguages || [multipleLanguageCode],
      resources: this.props.resources,
      queryTypeId: this.state.queryTypeId,
      query: this.getCurrentQuery() === undefined ? queryType.searchPlaceholder : this.getCurrentQuery(),
      embedded: this.props.embedded,
      placeholder: queryType.searchPlaceholder,
      onQueryChange: this.onQueryChange,
      onKeyDown: this.handleKey });
  },
  renderEmbed: function renderEmbed() {
    var queryType = queryTypeMap[this.state.queryTypeId];

    return React.createElement(
      "div",
      { className: "aligncenter", style: { marginLeft: 16, marginRight: 16 } },
      React.createElement(
        "div",
        { className: "input-group" },
        React.createElement(
          "span",
          { className: "input-group-addon", style: { backgroundColor: queryType.searchLabelBkColor } },
          queryType.searchLabel
        ),
        this.renderQueryInput(),
        React.createElement(
          "div",
          { className: "input-group-btn" },
          this.renderSearchButtonOrLink()
        )
      )
    );
  },
  renderGQB: function renderGQB() {
    var queryType = queryTypeMap[this.state.queryTypeId];

    return React.createElement(
      "div",
      { style: { marginLeft: 16, marginRight: 16 } },
      React.createElement(
        "div",
        { className: "panel panel-default" },
        React.createElement(
          "div",
          { className: "panel-heading", style: { backgroundColor: queryType.searchLabelBkColor, fontSize: "120%" } },
          queryType.searchLabel
        ),
        React.createElement(
          "div",
          { className: "panel-body" },
          this.renderQueryInput()
        ),
        React.createElement(
          "div",
          { className: "panel-footer" },
          React.createElement(
            "div",
            { className: "input-group" },
            React.createElement(
              "pre",
              { className: "adv-query-preview aligncenter input-control input-lg" },
              this.getCurrentQuery()
            ),
            React.createElement(
              "div",
              { className: "input-group-btn" },
              this.renderSearchButtonOrLink()
            )
          )
        )
      )
    );
  },
  renderUnavailableResourcesMessage: function renderUnavailableResourcesMessage() {
    if (!this.state.resources) {
      return;
    }
    var unavailable = [];
    this.state.resources.recurse(function (r) {
      if (r.selected && !r.visible) {
        unavailable.push(r);
      }
      if (r.selected) {
        // apparently a selected resource 
      }
    });

    if (unavailable.length) {
      return React.createElement(
        "div",
        { id: "unavailable-resources-message", className: "text-muted" },
        React.createElement(
          "div",
          { id: "unavailable-resources-message-message" },
          React.createElement(
            "a",
            { role: "button", "data-toggle": "dropdown" },
            unavailable.length,
            " selected resource",
            unavailable.length > 1 ? 's are' : ' is',
            " disabled in this search mode."
          )
        ),
        React.createElement(
          "ul",
          { id: "unavailable-resources-message-list", className: "dropdown-menu" },
          unavailable.map(function (r) {
            return React.createElement(
              "li",
              { className: "unavailable-resources-message-item" },
              r.name
            );
          })
        )
      );
    }
  },


  render: function render() {
    var queryType = queryTypeMap[this.state.queryTypeId];
    return React.createElement(
      "div",
      { className: "top-gap" },
      React.createElement(
        "div",
        { className: "row" },
        !this.props.embedded && this.state.queryTypeId == "fcs" ? this.renderGQB() : this.renderEmbed()
      ),
      React.createElement(
        "div",
        { className: "well", style: { marginTop: 20 } },
        React.createElement(
          "div",
          { className: "aligncenter" },
          React.createElement(
            "form",
            { className: "form-inline", role: "form" },
            React.createElement(
              "div",
              { className: "input-group" },
              React.createElement(
                "span",
                { className: "input-group-addon nobkg" },
                "Search for"
              ),
              React.createElement(
                "div",
                { className: "input-group-btn" },
                React.createElement(
                  "button",
                  { className: "form-control btn btn-default",
                    onClick: this.toggleLanguageSelection },
                  this.state.language[1],
                  " ",
                  React.createElement("span", { className: "caret" })
                ),
                React.createElement("span", null)
              ),
              React.createElement(
                "div",
                { className: "input-group-btn hidden-xxs" },
                React.createElement(
                  "ul",
                  { ref: "queryTypeDropdownMenu", className: "dropdown-menu" },
                  queryTypes.map(function (l) {
                    var cls = l.disabled ? 'disabled' : '';
                    var handler = function () {
                      if (!l.disabled) this.setQueryType(l.id);
                    }.bind(this);
                    return React.createElement(
                      "li",
                      { key: l.id, className: cls },
                      " ",
                      React.createElement(
                        "a",
                        { tabIndex: "-1", href: "#",
                          onClick: handler },
                        " ",
                        l.name,
                        " "
                      )
                    );
                  }.bind(this))
                ),
                React.createElement(
                  "button",
                  { className: "form-control btn btn-default",
                    "aria-expanded": "false", "data-toggle": "dropdown" },
                  queryType.name,
                  " ",
                  React.createElement("span", { className: "caret" })
                )
              )
            ),
            React.createElement(
              "div",
              { className: "input-group hidden-xs" },
              React.createElement(
                "span",
                { className: "input-group-addon nobkg" },
                "in"
              ),
              React.createElement(
                "button",
                { type: "button", className: "btn btn-default", onClick: this.toggleResourceSelection },
                this.state.resources.getSelectedMessage(),
                " ",
                React.createElement("span", { className: "caret" })
              )
            ),
            React.createElement(
              "div",
              { className: "input-group hidden-xs hidden-sm" },
              React.createElement(
                "span",
                { className: "input-group-addon nobkg" },
                "and show up to"
              ),
              React.createElement(
                "div",
                { className: "input-group-btn" },
                React.createElement("input", { type: "number", className: "form-control input", min: "10", max: "250",
                  style: { width: 60 },
                  onChange: this.setNumberOfResults, value: this.state.numberOfResults,
                  onKeyPress: this.stop })
              ),
              React.createElement(
                "span",
                { className: "input-group-addon nobkg" },
                "hits per endpoint"
              )
            )
          )
        )
      ),
      this.renderSearchPermaLink(),
      React.createElement(
        _modal2.default,
        { ref: "resourcesModal", title: React.createElement(
            "span",
            null,
            "Resources ",
            React.createElement(
              "small",
              { className: "text-muted" },
              this.props.resources && this.props.resources.getSelectedMessage()
            )
          ) },
        React.createElement(_resourceview2.default, { resources: this.state.resources, languageMap: this.state.languageMap })
      ),
      React.createElement(
        _modal2.default,
        { ref: "languageModal", title: React.createElement(
            "span",
            null,
            "Select Language"
          ) },
        React.createElement(_languageselector2.default, { anyLanguage: this.anyLanguage,
          languageMap: this.state.languageMap,
          selectedLanguage: this.state.language,
          languageFilter: this.state.languageFilter,
          languageChangeHandler: this.setLanguageAndFilter })
      ),
      React.createElement(
        _modal2.default,
        { ref: "resultModal", title: this.renderZoomedResultTitle(this.state.zoomedResourceHit) },
        React.createElement(_zoomedresult2.default, { resourceHit: this.state.zoomedResourceHit,
          nextResults: this.nextResults,
          getDownloadLink: this.getDownloadLink,
          getToWeblichtLink: this.getToWeblichtLink,
          searchedLanguage: this.state.language,
          weblichtLanguages: this.state.weblichtLanguages,
          languageMap: this.state.languageMap,
          queryTypeId: this.state.queryTypeId })
      ),
      React.createElement(
        "div",
        { className: "top-gap" },
        React.createElement(_results2.default, { collhits: this.filterResults(),
          toggleResultModal: this.toggleResultModal,
          getDownloadLink: this.getDownloadLink,
          getToWeblichtLink: this.getToWeblichtLink,
          searchedLanguage: this.state.language,
          queryTypeId: this.state.queryTypeId })
      )
    );
  }
});

function Resources(resources, updateFn) {
  var that = this;
  this.resources = resources;
  this.update = function () {
    updateFn(that);
  };

  var sortFn = function sortFn(x, y) {
    var r = x.institution.localeCompare(y.institution);
    if (r !== 0) {
      return r;
    }
    return x.title.toLowerCase().localeCompare(y.title.toLowerCase());
  };

  this.recurse(function (resource) {
    resource.subResources.sort(sortFn);
  });
  this.resources.sort(sortFn);

  this.recurse(function (resource, index) {
    resource.visible = true; // visible in the resource view
    resource.selected = false; // not selected in the resource view, assign later
    resource.expanded = false; // not expanded in the resource view
    resource.priority = 1; // used for ordering search results in resource view
    resource.index = index; // original order, used for stable sort
  });
}

Resources.prototype.recurseResource = function (resource, fn) {
  if (false === fn(resource)) {
    // no recursion
  } else {
    this.recurseResources(resource.subResources, fn);
  }
};

Resources.prototype.recurseResources = function (resources, fn) {
  var recfn = function recfn(resource, index) {
    if (false === fn(resource, index)) {
      // no recursion
    } else {
      resource.subResources.forEach(recfn);
    }
  };
  resources.forEach(recfn);
};

Resources.prototype.recurse = function (fn) {
  this.recurseResources(this.resources, fn);
};

Resources.prototype.getLanguageCodes = function () {
  var languages = {};
  this.recurse(function (resource) {
    resource.languages.forEach(function (lang) {
      languages[lang] = true;
    });
    return true;
  });
  return languages;
};

Resources.prototype.isResourceVisible = function (resource, queryTypeId, languageCode) {
  // check search capabilities (ignore version, just check caps)
  if (queryTypeId === "fcs" && resource.endpoint.searchCapabilities.indexOf("ADVANCED_SEARCH") === -1) {
    return false;
  }
  // yes for any language
  if (languageCode === multipleLanguageCode) {
    return true;
  }
  // yes if the resource is in only that language
  if (resource.languages && resource.languages.length === 1 && resource.languages[0] === languageCode) {
    return true;
  }

  // ? yes if the resource also contains that language
  if (resource.languages && resource.languages.indexOf(languageCode) >= 0) {
    return true;
  }

  // ? yes if the resource has no language
  // if (!resource.languages || resource.languages.length === 0) {
  // 	return true;
  // }
  return false;
};

Resources.prototype.setVisibility = function (queryTypeId, languageCode) {
  // top level
  this.resources.forEach(function (resource) {
    resource.visible = this.isResourceVisible(resource, queryTypeId, languageCode);
    this.recurseResources(resource.subResources, function (c) {
      c.visible = resource.visible;
    });
  }.bind(this));
};

Resources.prototype.setAggregationContext = function (endpoints2handles) {
  var _this = this;

  var selectSubTree = function selectSubTree(select, resource) {
    resource.selected = select;
    this.recurseResources(resource.subResources, function (c) {
      c.selected = resource.selected;
    });
  };

  this.resources.forEach(selectSubTree.bind(this, false));

  var handlesNotFound = [];
  var resourcesToSelect = [];
  _.pairs(endpoints2handles).forEach(function (endp) {
    var endpoint = endp[0];
    var handles = endp[1];
    console.log("setAggregationContext: endpoint", endpoint);
    console.log("setAggregationContext: handles", handles);
    handles.forEach(function (handle) {
      var found = false;
      _this.recurse(function (resource) {
        if (resource.handle === handle) {
          found = true;
          resourcesToSelect.push(resource);
        }
      });
      if (!found) {
        console.warn("Handle not found in resources", handle);
        handlesNotFound.push(handle);
      }
    });
  });

  resourcesToSelect.forEach(selectSubTree.bind(this, true));
  return { 'selected': resourcesToSelect, 'unavailable': handlesNotFound };
};

Resources.prototype.getSelectedIds = function () {
  var ids = [];
  this.recurse(function (resource) {
    if (resource.visible && resource.selected) {
      ids.push(resource.id);
      //return false; // top-most resource in tree, don't delve deeper
      // But subresources are also selectable on their own?...
    }
    return true;
  });

  // console.log("ids: ", ids.length, {ids:ids});
  return ids;
};

Resources.prototype.getSelectedMessage = function () {
  var selected = this.getSelectedIds().length;
  if (this.resources.length === selected) {
    return "All available resources (" + selected + ")";
  } else if (selected === 1) {
    return "1 selected resource";
  }
  return selected + " selected resources";
};

function getQueryVariable(variable) {
  var query = window.location.search.substring(1);
  var vars = query.split('&');
  for (var i = 0; i < vars.length; i++) {
    var pair = vars[i].split('=');
    if (decodeURIComponent(pair[0]) == variable) {
      console.log("variable found: (", variable, ") = ", decodeURIComponent(pair[1]));
      return decodeURIComponent(pair[1]);
    }
  }
  return null;
}

/* setter opposite of getQueryVariable*/
function setQueryVariable(qvar, value) {
  var query = window.location.search.substring(1);
  var vars = query.split('&');
  var d = {};
  d[qvar] = value;
  var found = false;
  for (var i = 0; i < vars.length; i++) {
    var pair = vars[i].split('=');
    if (decodeURIComponent(pair[0]) === qvar) {

      vars[i] = encodeQueryData(d);
      found = true;
      break;
    }
  }

  if (!found) {
    // add to end of url
    vars.push(encodeQueryData(d));
  }

  var searchPart = vars.join('&');
  var newUrl = window.location.origin + window.location.pathname + '?' + searchPart;
  console.log("set url", newUrl);
  window.history.replaceState(window.history.state, null, newUrl);
}

function encodeQueryData(data) {
  var ret = [];
  for (var d in data) {
    ret.push(encodeURIComponent(d) + "=" + encodeURIComponent(data[d]));
  }
  return ret.join("&");
}

var queryTypes = [{
  id: "cql",
  name: "Text layer Contextual Query Language (CQL)",
  searchPlaceholder: "Elephant",
  searchLabel: "Text layer CQL query",
  searchLabelBkColor: "#fed",
  className: ''
}, {
  id: "fcs",
  name: "Multi-layer Federated Content Search Query Language (FCS-QL)",
  searchPlaceholder: "[word = 'annotation'][word = 'focused']",
  searchLabel: "Multi-layer FCS query",
  searchLabelBkColor: "#efd",
  disabled: false
}];

var queryTypeMap = {
  cql: queryTypes[0],
  fcs: queryTypes[1]
};

module.exports = AggregatorPage;

},{"../components/languageselector.jsx":47,"../components/modal.jsx":48,"../components/queryinput.jsx":50,"../components/resourceview.jsx":51,"../components/results.jsx":53,"../components/zoomedresult.jsx":55,"classnames":2,"create-react-class":6,"prop-types":15}],59:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var HelpPage = (0, _createReactClass2.default)({
  displayName: "HelpPage",

  //fixme! - class HelpPage extends React.Component {
  openHelpDesk: function openHelpDesk() {
    window.open('http://support.clarin-d.de/mail/form.php?queue=Aggregator&lang=en', '_blank', 'height=560,width=370');
  },

  render: function render() {
    return React.createElement(
      "div",
      null,
      React.createElement(
        "div",
        { className: "top-gap" },
        React.createElement(
          "h1",
          null,
          "Help"
        ),
        React.createElement(
          "h3",
          null,
          "Performing federated search in resources"
        ),
        React.createElement(
          "p",
          null,
          "To perform a simple keyword search in all CLARIN Federated Content Search centres and their resources, go to the search field at the top of the page or switch to Text Layer Contextual Query Language (CQL) in the dropdown list, enter your query, and click the 'search' button or press the 'Enter' key."
        ),
        React.createElement(
          "p",
          null,
          "To perform an advanced search on multiple annotation layers in CLARIN Federated Content Search centres that support this, switch to Multi-layer Federated Content Search (FCS-QL) in the dropdown list, create the query in the Graphical Query Builder, and click the 'search' button or press the 'Enter' key. Alternatively in embedded mode enter a FCS-QL query in the search field at the top of the page."
        ),
        React.createElement(
          "p",
          null,
          "When the search starts, the page will start filling in with the resource responses. After the entire search process has ended you have the option to download the results in various formats."
        ),
        React.createElement(
          "p",
          null,
          "If you are particularly interested in the results returned by a resource, you have the option to focus only on the results of that resource, by clicking on the 'Watch' button. In this view mode you can also download the results of use the WebLicht processing services to further analyse the results."
        ),
        React.createElement(
          "h3",
          null,
          "Adjusting search criteria"
        ),
        React.createElement(
          "p",
          null,
          "The FCS Aggregator makes possible to select specific resources based on their name or language and to specify the number of search results (hits) per resource per page. The user interface controls that allows to change these options are located right below the search fiels on the main page. The current options are to filter resources based on their language, to select specific resources, and to set the maximum number of hits. In the multi-layer FCS search the supported layers filter on the supported features like, e. g. part of speech or lemma in addition to the other filter options."
        ),
        React.createElement(
          "h3",
          null,
          "More help"
        ),
        React.createElement(
          "p",
          null,
          "More detailed information on using FCS Aggregator is available at the \xA0",
          React.createElement(
            "a",
            { href: "https://www.clarin.eu/content/content-search-tutorial" },
            "Aggregator wiki page"
          ),
          ". If you still cannot find an answer to your question, or if want to send a feedback, you can write to the ",
          React.createElement(
            "a",
            { title: "contact", href: "mailto:sb-sysadmin@svenska.gu.se" },
            "Swe-Clarin helpdesk"
          ),
          "."
        )
      )
    );
  }
});

module.exports = HelpPage;

},{"classnames":2,"create-react-class":6,"prop-types":15}],60:[function(require,module,exports){
"use strict";

var _classnames = require("classnames");

var _classnames2 = _interopRequireDefault(_classnames);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _createReactClass = require("create-react-class");

var _createReactClass2 = _interopRequireDefault(_createReactClass);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var PT = _propTypes2.default;

var StatisticsPage = (0, _createReactClass2.default)({
  displayName: "StatisticsPage",

  // fixme! - class StatisticsPage extends React.Component {
  propTypes: {
    APIROOT: PT.string.isRequired,
    ajax: PT.func.isRequired
  },

  getInitialState: function getInitialState() {
    return {
      stats: {},
      activeTab: 0
      // searchStats: {},
      // lastScanStats: {},
    };
  },

  componentDidMount: function componentDidMount() {
    this.refreshStats();
  },

  refreshStats: function refreshStats() {
    this.props.ajax({
      url: this.props.APIROOT + 'statistics',
      success: function (json, textStatus, jqXHR) {
        this.setState({ stats: json });
        // console.log("stats:", json);
      }.bind(this)
    });
  },

  renderWaitTimeSecs: function renderWaitTimeSecs(t) {
    var hue = t * 4;
    if (hue > 120) {
      hue = 120;
    }
    var a = hue / 120;
    hue = 120 - hue;
    var shue = "hsla(" + hue + ",100%,80%," + a + ")";
    return React.createElement(
      "span",
      { className: "badge", style: { backgroundColor: shue, color: "black" } },
      t.toFixed(3),
      "s"
    );
  },

  renderResources: function renderResources(colls) {
    return React.createElement(
      "div",
      { style: { marginLeft: 40 } },
      colls.length === 0 ? React.createElement(
        "div",
        { style: { color: "#a94442" } },
        "No resources found"
      ) : React.createElement(
        "div",
        null,
        colls.length,
        " root resource",
        colls.length != 1 ? "s" : "",
        ":",
        React.createElement(
          "ul",
          { className: "list-unstyled", style: { marginLeft: 40 } },
          colls.map(function (name, i) {
            return React.createElement(
              "div",
              { key: i },
              name
            );
          })
        )
      )
    );
  },

  renderDiagnostic: function renderDiagnostic(d) {
    var classes = "inline alert alert-warning " + (d.diagnostic.uri === 'LEGACY' ? "legacy" : "");
    return React.createElement(
      "div",
      { key: d.diagnostic.uri },
      React.createElement(
        "div",
        { className: classes },
        React.createElement(
          "div",
          null,
          d.counter <= 1 ? false : React.createElement(
            "div",
            { className: "inline", style: { margin: "5px 5px 5px 5px" } },
            React.createElement(
              "span",
              { className: "badge", style: { backgroundColor: '#ae7241' } },
              "x ",
              d.counter
            )
          ),
          "Diagnostic: ",
          d.diagnostic.message,
          ": ",
          d.diagnostic.diagnostic
        ),
        React.createElement(
          "div",
          null,
          "Context: ",
          React.createElement(
            "a",
            { href: d.context },
            d.context
          )
        )
      )
    );
  },

  renderError: function renderError(e) {
    var xc = e.exception;
    return React.createElement(
      "div",
      { key: xc.message },
      React.createElement(
        "div",
        { className: "inline alert alert-danger", role: "alert" },
        React.createElement(
          "div",
          null,
          e.counter <= 1 ? false : React.createElement(
            "div",
            { className: "inline", style: { margin: "5px 5px 5px 5px" } },
            React.createElement(
              "span",
              { className: "badge", style: { backgroundColor: '#c94442' } },
              "x ",
              e.counter,
              " "
            )
          ),
          "Exception: ",
          xc.message
        ),
        React.createElement(
          "div",
          null,
          "Context: ",
          React.createElement(
            "a",
            { href: e.context },
            e.context
          )
        ),
        xc.cause ? React.createElement(
          "div",
          null,
          "Caused by: ",
          xc.cause
        ) : false
      )
    );
  },

  renderEndpoint: function renderEndpoint(isScan, endpoint) {
    var stat = endpoint[1];
    var errors = _.values(stat.errors);
    var diagnostics = _.values(stat.diagnostics);
    var validatorUrlForEndpoint = window.MyAggregator.validatorUrl + "?url=" + encodeURIComponent(endpoint[0]);
    return React.createElement(
      "div",
      { style: { marginTop: 10 }, key: endpoint[0] },
      React.createElement(
        "ul",
        { className: "list-inline list-unstyled", style: { marginBottom: 0 } },
        React.createElement(
          "li",
          null,
          stat.version == "LEGACY" ? React.createElement(
            "span",
            { style: { color: '#a94442' } },
            "legacy ",
            React.createElement("i", { className: "glyphicon glyphicon-thumbs-down" }),
            " "
          ) : stat.version == "VERSION_1" ? React.createElement(
            "span",
            { style: { color: '#a94442' } },
            "version 1 ",
            React.createElement("i", { className: "glyphicon glyphicon-thumbs-down" })
          ) : React.createElement(
            "span",
            { style: { color: '#3c763d' } },
            "version 2 ",
            React.createElement("i", { className: "glyphicon glyphicon-thumbs-up" }),
            " "
          ),
          " " + endpoint[0] + " ",
          window.MyAggregator.validatorUrl ? React.createElement(
            "a",
            { href: validatorUrlForEndpoint, target: "_blank", title: "Inspect FCS Endpoint in Validator" },
            React.createElement("i", { className: "glyphicon glyphicon-eye-open" })
          ) : false
        )
      ),
      React.createElement(
        "div",
        { style: { marginLeft: 40 } },
        "Search capabilities: ",
        stat.searchCapabilities
        // strip "_SEARCH" suffix
        .map(function (x) {
          return x.substring(0, x.lastIndexOf('_'));
        })
        // add heart icon for ADVANCED search
        .map(function (x) {
          return x === "ADVANCED" ? React.createElement(
            "span",
            null,
            x,
            " ",
            React.createElement("i", { className: "glyphicon glyphicon-heart-empty" })
          ) : x;
        })
        // join
        .map(function (x, i) {
          return React.createElement(
            "span",
            null,
            i > 0 && ", ",
            x
          );
        })
      ),
      React.createElement(
        "div",
        { style: { marginLeft: 40 } },
        isScan ? React.createElement(
          "div",
          null,
          "Max concurrent scan requests:",
          " ",
          " ",
          stat.maxConcurrentRequests,
          " "
        ) : React.createElement(
          "div",
          null,
          "Max concurrent search requests:",
          " ",
          " ",
          stat.maxConcurrentRequests,
          " "
        )
      ),
      React.createElement(
        "div",
        { style: { marginLeft: 40 } },
        React.createElement(
          "span",
          null,
          stat.numberOfRequests
        ),
        " request(s), average:",
        this.renderWaitTimeSecs(stat.avgExecutionTime),
        ", max: ",
        this.renderWaitTimeSecs(stat.maxExecutionTime)
      ),
      isScan ? this.renderResources(stat.rootResources) : false,
      errors && errors.length ? React.createElement(
        "div",
        { className: "inline", style: { marginLeft: 40 } },
        errors.map(this.renderError)
      ) : false,
      diagnostics && diagnostics.length ? React.createElement(
        "div",
        { className: "inline", style: { marginLeft: 40 } },
        diagnostics.map(this.renderDiagnostic)
      ) : false
    );
  },

  renderInstitution: function renderInstitution(isScan, inst) {
    return React.createElement(
      "div",
      { style: { marginTop: 30 }, key: inst[0] },
      React.createElement(
        "h4",
        null,
        inst[0]
      ),
      React.createElement(
        "div",
        { style: { marginLeft: 20 } },
        " ",
        _.pairs(inst[1]).map(this.renderEndpoint.bind(this, isScan))
      )
    );
  },

  renderStatistics: function renderStatistics(stats) {
    return React.createElement(
      "div",
      { className: "container statistics", style: { marginTop: 20 } },
      React.createElement(
        "div",
        null,
        React.createElement(
          "div",
          null,
          "Start date: ",
          new Date(stats.date).toLocaleString()
        ),
        React.createElement(
          "div",
          null,
          "Timeout: ",
          " ",
          React.createElement(
            "kbd",
            null,
            stats.timeout,
            " seconds"
          )
        )
      ),
      React.createElement(
        "div",
        null,
        " ",
        _.pairs(stats.institutions).map(this.renderInstitution.bind(this, stats.isScan)),
        " "
      )
    );
  },

  setTab: function setTab(idx, e) {
    this.setState({ activeTab: idx });
    e.preventDefault();
    e.stopPropagation();
  },

  render: function render() {
    return React.createElement(
      "div",
      null,
      React.createElement(
        "div",
        { className: "top-gap" },
        React.createElement(
          "h1",
          null,
          "Statistics"
        ),
        React.createElement("p", null),
        React.createElement(
          "div",
          { role: "tabpanel" },
          React.createElement(
            "ul",
            { className: "nav nav-tabs", role: "tablist" },
            _.pairs(this.state.stats).map(function (st, idx) {
              var classname = idx === this.state.activeTab ? "active" : "";
              return React.createElement(
                "li",
                { role: "presentation", className: classname, key: st[0] },
                React.createElement(
                  "a",
                  { href: "#", title: st[0], role: "tab", onClick: this.setTab.bind(this, idx) },
                  st[0]
                )
              );
            }.bind(this))
          ),
          React.createElement(
            "div",
            { className: "tab-content" },
            _.pairs(this.state.stats).map(function (st, idx) {
              var classname = idx === this.state.activeTab ? "tab-pane active" : "tab-pane";
              return React.createElement(
                "div",
                { role: "tabpanel", className: classname, key: st[0] },
                this.renderStatistics(st[1])
              );
            }.bind(this))
          )
        )
      )
    );
  }
});

module.exports = StatisticsPage;

},{"classnames":2,"create-react-class":6,"prop-types":15}]},{},[56]);
