Area Chart in EJ2 JavaScript control

14 Dec 202424 minutes to read

Area

To render an area series in your chart, you need to follow a few steps to configure it correctly. Here’s a concise guide on how to do this:

Set the series type: Define the series type as Area in your chart configuration. This indicates that the data should be represented as an area chart, which is ideal for showing trends over time or across categories, with filled areas beneath the lines representing data points.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: 3.8 },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        // Series type as area series
        type: 'Area'
    }],
    title: 'Average Sales Comparison'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Binding data with series

You can bind data to the chart using the dataSource property within the series configuration. This allows you to connect a JSON dataset or remote data to your chart. To display the data correctly, map the fields from the data to the chart series xName and yName properties.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: 3.8 },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        // Series type as area series
        type: 'Area'
    }],
    title: 'Average Sales Comparison'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Series customization

The following properties can be used to customize the area series.

Fill

The fill property determines the color applied to the series.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: 3.8 },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        type: 'Area',
        fill: '#69D2E7'
    }],
    title: 'Average Sales Comparison'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

The fill property can be used to apply a gradient color to the area series. By configuring this property with gradient values, you can create a visually appealing effect in which the color transitions smoothly from one shade to another.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: 3.8 },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        type: 'Area',
        fill: 'url(#gradient)'
    }],
    title: 'Average Sales Comparison'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <svg style="width:1px; height:1px">
        <defs>
            <linearGradient id="gradient">
                <stop offset="0%" style="stop-color:blue;stop-opacity:5" />
                <stop offset="50%" style="stop-color:violet;stop-opacity:5" />
            </linearGradient>
        </defs>
    </svg>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Opacity

The opacity property specifies the transparency level of the fill. Adjusting this property allows you to control how opaque or transparent the fill color of the series appears.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: 3.8 },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        type: 'Area',
        opacity: 0.5
    }],
    title: 'Average Sales Comparison'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Area border

Use the border property to customize the width, color and dasharray of the series border.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: 3.8 },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        type: 'Area',
        fill: '#69D2E7',
        border: { width: 2, color: '#962D18', dashArray: '5,5' }
    }],
    title: 'Average Sales Comparison'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Multicolored area

To render a multicolored area series in your chart, you need to follow a few steps to configure it correctly. Here’s a concise guide on how to do this:

Set the series type: Define the series type as MultiColoredArea in your chart configuration. This specifies that the series should be rendered as a multicolored area chart, with different segments of the area having distinct colors.
Customize the Segments: Define the segments of the series using the segments property. Each segment can be customized with properties such as value, color, and dashArray.
- value - Specifies the endpoint of the segment.
- color - Defines the color of the segment.
- dashArray - Defines the dashes or gaps in the segment.

index.js
index.html
var chartData = [
    { x: 2005, y: 28 }, 
    { x: 2006, y: 25}, 
    { x: 2007, y: 26 }, 
    { x: 2008, y: 27 },
    { x: 2009, y: 32}, 
    { x: 2010, y: 35 }, 
    { x: 2011, y: 25 }
];

var chart = new ej.charts.Chart({
   series:[{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        type: 'MultiColoredArea',
        segmentAxis: 'X',
        segments: [
            {
                value: 2007,
                color: 'blue'
            },
            {
                value: 2009,
                color: 'lightgreen'
            },
            {
                color: 'orange'
            }
        ]
    }]
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Empty points

Data points with null or undefined values are considered empty. Empty data points are ignored and not plotted on the chart.

Mode

Use the mode property to define how empty or missing data points are handled in the series. The default mode for empty points is Gap.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: null },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        type: 'Area',
        emptyPointSettings: {
            mode: 'Gap'
        }
    }],
    title: 'Average Sales Comparison'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Fill

Use the fill property to customize the fill color of empty points in the series.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: null },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        type: 'Area',
        marker: { visible: true, width: 7, height: 7, isFilled: true },
        emptyPointSettings: {
            mode: 'Average',
            fill: 'red'
        }
    }],
    title: 'Average Sales Comparison'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Border

Use the border property to customize the width and color of the border for empty points.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: null },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        type: 'Area',
        marker: { visible: true, width: 7, height: 7, isFilled: true },
        emptyPointSettings: {
            mode: 'Average',
            fill: 'red',
            border: { width: 2, color: 'green' }
        }
    }],
    title: 'Average Sales Comparison'
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Events

Series render

The seriesRender event allows you to customize series properties, such as data, fill, and name, before they are rendered on the chart.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: 3.8 },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        // Series type as area series
        type: 'Area'
    }],
    title: 'Average Sales Comparison',
    seriesRender: function (args) {
        args.fill = '#ff6347';
    }
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>

Point render

The pointRender event allows you to customize each data point before it is rendered on the chart.

index.js
index.html
var chartData = [
    { x: 1900, y: 4 }, { x: 1920, y: 3.0 }, { x: 1940, y: 3.8 },
    { x: 1960, y: 3.4 }, { x: 1980, y: 3.2 }, { x: 2000, y: 3.9 }
];
var chart = new ej.charts.Chart({
    primaryXAxis: {
        title: 'Year',
        minimum: 1900,
        maximum: 2000,
        interval: 10,
        edgeLabelPlacement: 'Shift'
    },
    primaryYAxis: {
        minimum: 2,
        maximum: 5,
        interval: 0.5,
        title: 'Sales Amount in Millions'
    },
    series: [{
        dataSource: chartData,
        xName: 'x', yName: 'y',
        marker: { visible: true },
        // Series type as area series
        type: 'Area'
    }],
    title: 'Average Sales Comparison',
    pointRender: function (args) {
        if (args.point.index % 2 !== 0) {
            args.fill = '#ff6347';
        }
        else {
            args.fill = '#009cb8';
        }
    }
}, '#element');
<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Animation</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <script src="https://cdn.syncfusion.com/ej2/29.1.33/dist/ej2.min.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>

<body>
    <div id="container">
        <div id="element"></div>
    </div>
    <script>
        var ele = document.getElementById('container');
        if (ele) {
            ele.style.visibility = "visible";
        }   
    </script>
    <script src="index.js" type="text/javascript"></script>
</body>

</html>