Chart.js - StackedArea Chart

Introduction

A stacked area chart is a line chart extension that is optimized for stacked data.

<div class=“canvas-holder”> <canvas width=“250” height=“125”></canvas> </div>

Example usage

var myStackedAreaChart = new Chart(ctx).StackedArea(data, options);

Data structure

var data = {
    labels: ["January", "February", "March", "April", "May", "June", "July"],
    datasets: [
        {
            label: "My First dataset",
            fillColor: "rgba(220,220,220,0.5)",
            strokeColor: "rgba(220,220,220,0.8)",
            highlightFill: "rgba(220,220,220,0.75)",
            highlightStroke: "rgba(220,220,220,1)",
            data: [65, 59, 80, 81, 56, 55, 40]
        },
        {
            label: "My Second dataset",
            fillColor: "rgba(151,187,205,0.5)",
            strokeColor: "rgba(151,187,205,0.8)",
            highlightFill: "rgba(151,187,205,0.75)",
            highlightStroke: "rgba(151,187,205,1)",
            data: [28, 48, 40, 19, 86, 27, 90]
        }
    ]
};

Chart Options

These are the customisation options specific to StackedArea charts. These options are merged with the global chart configuration options, and form the options of the standard line chart.

{
    //Boolean - Whether points should be rendered on a percentage base
    relativePoints : false,
}

You can override these for your Chart instance by passing a second argument into the StackedArea method as an object with the keys you want to override.

For example, we could have a stacked point chart without a stroke on each point by doing the following:

new Chart(ctx).StackedArea(data, {
    relativePoints: true
});
// This will create a chart with all of the default options, merged from the global config,
//  and the StackedArea chart defaults but this particular instance will have `relativePoints` set to true.