Range Area in JavaScript Chart control

08 May 2023 / 2 minutes to read

Range area

To render a range area series, use series type as RangeArea and inject RangeAreaSeries module using Chart.Inject(RangeAreaSeries) method.

Since the RangeArea series requires two y values for a point, you have to add the high and low value. High and Low value specifies the maximum and minimum range of the points.

Source

Preview

index.ts

index.html

import { Chart, RangeAreaSeries, DateTime } from '@syncfusion/ej2-charts';
Chart.Inject(RangeAreaSeries, DateTime);

let series: Object[] = [];
let value: number = 70;
let point: Object;

for (let i: number = 1; i < 70; i++) {
    if (Math.random() > .5) {
        value += Math.random();
    } else {
        value -= Math.random();
    }
    point = { x: new Date(1930 + i, 5, i), high: value, low: value - 25 };
    series.push(point);
}

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'DateTime',
    },
    series: [
        {
            type: 'RangeArea',
            dataSource: series,
            xName: 'x', high: 'high', low: 'low',
        }],
}, '#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://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
</head>

<body>
    <div id='loader'>Loading....</div>
    <div id='container'>
        <div id='element'></div>
    </div>
</body>

</html>

Series customization

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

fill – Specifies the color of the area series.
opacity – Specifies the opacity of fill.
dashArray – Specifies the dashes of series.
border – Specifies the color and width of series border.