---
layout: 3x-api
title: Express 3.x - API 参考
menu: api
lang: zh-cn
description: Access the API reference for Express.js version 3.x, noting that this
  version is end-of-life and no longer maintained - includes details on modules and
  methods.
---
<div id="api-doc" markdown="1">

  <div class="doc-box doc-warn" markdown="1">
  **Express 3.x 不再受到维护**

  自上次更新（2015 年 8 月 1 日）以来 3.x 中已知和未知的安全问题和性能问题都尚未处理。因此强烈建议您使用最新版本的 Express。
  </div>

  <h1>3.x API</h1>

  <a id='express' class='h2'></a>
  {% include api/en/3x/express.md %}

  <a id='application' class='h2'></a>
  {% include api/en/3x/app.md %}

  <a id='request' class='h2'></a>
  {% include api/en/3x/req.md %}

  <a id='response' class='h2'></a>
  {% include api/en/3x/res.md %}

  <a id='middleware' class='h2'></a>
  {% include api/en/3x/middleware.md %}

</div>
