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Zooming in JavaScript Chart control

17 Mar 2023 / 5 minutes to read

Enable Zooming

Chart can be zoomed in three ways.

Selection - By setting enableSelectionZooming property to true in zoomSettings, you can zoom the chart by using the rubber band selection.
Mousewheel - By setting enableMouseWheelZooming property to true in zoomSettings, you can zoomin and zoomout the chart by scrolling the mouse wheel.
Pinch - By setting enablePinchZooming property to true in zoomSettings, you can zoom the chart through pinch gesture in touch enabled devices.

Pinch zooming is supported only in browsers that support multi-touch gestures. Currently IE11, Chrome and Opera browsers support multi-touch in desktop devices.

Source

Preview

index.ts

index.html

import { Chart, AreaSeries, Legend, Zoom, DateTime } from '@syncfusion/ej2-charts';
import { series1 } from './datasource.ts';
Chart.Inject(AreaSeries, DateTime, Legend, Zoom);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'DateTime',
    },
    series: [
        {
            type: 'Area',
            dataSource: series1,
            name: 'Product X',
            xName: 'x',
            yName: 'y',
            border: { width: 0.5, color: '#00bdae' },
            animation: { enable: false }
        },
    ],
    //Zooming for chart
    zoomSettings:
    {
        enableMouseWheelZooming: true,
        enablePinchZooming: true,
        enableSelectionZooming: true
    },
    title: 'Sales History of Product X',
    legendSettings: { visible: false },
}, '#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>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

After zooming the chart, a zooming toolbar will appear with zoom,zoomin, zoomout, pan and reset buttons. Selecting the Pan option will allow to pan the chart and selecting the Reset option will reset the zoomed chart.

Modes

The mode property in zoomSettings specifies whether the chart is allowed to scale along the horizontal axis or vertical axis. The default value of the mode is XY (both axis).

There are three types of mode.

X- Allows us to zoom the chart horizontally.
Y - Allows us to zoom the chart vertically.
XY – Allows us to zoom the chart both vertically and horizontally.

Source

Preview

index.ts

index.html

import { Chart, AreaSeries, Legend, Zoom, DateTime } from '@syncfusion/ej2-charts';
import { series1 } from './datasource.ts';
Chart.Inject(AreaSeries, DateTime, Legend, Zoom);

let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'DateTime',
    },
    series: [
        {
            type: 'Area',
            dataSource: series1,
            name: 'Product X',
            xName: 'x',
            yName: 'y',
            border: { width: 0.5, color: '#00bdae' },
            animation: { enable: false }
        },
    ],
    zoomSettings:
    {
        enableSelectionZooming: true,
        //zoom mode as x
        mode: 'X'
    },
    title: 'Sales History of Product X',
    legendSettings: { visible: false },
}, '#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>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

By default, zoomin, zoomout, pan and reset buttons will be displayed for zoomed chart. You can customize to show the desired options in the toolbar using the toolbarItems property. Also using the showToolbar property, you can show toolkit for zooming and panning the chart during initial rendering itself.

Source

Preview

index.ts

index.html

import { Chart, AreaSeries, Legend, Zoom, DateTime } from '@syncfusion/ej2-charts';
import { series1 } from './datasource.ts';
Chart.Inject(AreaSeries, DateTime, Legend, Zoom);
let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'DateTime',
    },
    series: [
        {
            type: 'Area',
            dataSource: series1,
            name: 'Product X',
            xName: 'x',
            yName: 'y',
            border: { width: 0.5, color: '#00bdae' },
            animation: { enable: false }
        },
    ],
    zoomSettings:
    {
        enableSelectionZooming: true, showToolbar: true,
        //Toolbar items for zooming toolkit
        toolbarItems: ['Zoom', 'Pan', 'Reset']
    },
    title: 'Sales History of Product X',
    legendSettings: { visible: false },
}, '#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>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Enable pan

Using enablePan property you can able to pan the zoomed chart without help of toolbar items.

Source

Preview

index.ts

index.html

import { Chart, AreaSeries, Legend, Zoom, DateTime } from '@syncfusion/ej2-charts';
import { series1 } from './datasource.ts';
Chart.Inject(AreaSeries, DateTime, Legend, Zoom);
let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'DateTime',
        zoomFactor: 0.2, zoomPosition: 0.6
    },
    series: [
        {
            type: 'Area',
            dataSource: series1,
            name: 'Product X',
            xName: 'x',
            yName: 'y',
            border: { width: 0.5, color: '#00bdae' },
            animation: { enable: false }
        },
    ],
    zoomSettings:
    {
        enableSelectionZooming: true,
        enablePan: true
    },
    title: 'Sales History of Product X',
    legendSettings: { visible: false },
}, '#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>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Enable Scrollbar

Using enableScrollbar property, you can able to add scrollbar for zoomed chart. Using this scrollbar, you can pan or zoom the chart.

Source

Preview

index.ts

index.html

import { Chart, AreaSeries, Legend, Zoom, DateTime, ScrollBar } from '@syncfusion/ej2-charts';
import { series1 } from './datasource.ts';
Chart.Inject(AreaSeries, DateTime, Legend, Zoom, ScrollBar);
let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'DateTime',
    },
    series: [
        {
            type: 'Area',
            dataSource: series1,
            name: 'Product X',
            xName: 'x',
            yName: 'y',
            border: { width: 0.5, color: '#00bdae' },
            animation: { enable: false }
        },
    ],
    zoomSettings:
    {
        enableSelectionZooming: true,
        enableScrollbar: true,
        mode:'X'
    },
    title: 'Sales History of Product X',
    legendSettings: { visible: false },
}, '#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>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Auto interval on zooming

By using enableAutoIntervalOnZooming property, the axis interval will get calculated automatically with respect to the zoomed range.

Source

Preview

index.ts

index.html

import { Chart, AreaSeries, Legend, Zoom, DateTime } from '@syncfusion/ej2-charts';
import { series1 } from './datasource.ts';
Chart.Inject(AreaSeries, DateTime, Legend, Zoom);
let chart: Chart = new Chart({
    primaryXAxis: {
        valueType: 'DateTime',
    },
    series: [
        {
            type: 'Area',
            dataSource: series1,
            name: 'Product X',
            xName: 'x',
            yName: 'y',
            border: { width: 0.5, color: '#00bdae' },
            animation: { enable: false }
        },
    ],
    zoomSettings:
    {
        enableSelectionZooming: true,
    },
    enableAutoIntervalOnZooming: true,
    title: 'Sales History of Product X',
    legendSettings: { visible: false },
}, '#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>
     <script id="Unemployment" type="text/x-template">
      <div id='templateWrap'>
     <table style="width:100%;  border: 1px solid black;">
     <tr><th colspan="2" bgcolor="#00FFFF">Unemployment</th></tr>
     <tr><td bgcolor="#00FFFF">${x}:</td><td bgcolor="#00FFFF">${y}</td></tr>
    </table>
    </div>
  </script>
</body>

</html>

Note: To use zooming feature, we need to inject Zoom module Chart.Inject(Zoom) method.

Contents

Enable Zooming
Modes
Toolbar
Enable pan
Enable Scrollbar
Auto interval on zooming

Contents

Enable Zooming
Modes
Toolbar
Enable pan
Enable Scrollbar
Auto interval on zooming