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Center Label in JavaScript Accumulation Chart control

06 Jun 2023 / 3 minutes to read

Using centerLabel it is now possible to place a label at the center of a pie or doughnut chart. To configure the default text rendered on the center label for the pie and doughnut charts, use the text property in the centerLabel.

Source
Preview
index.ts
index.html
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import { AccumulationChart } from '@syncfusion/ej2-charts';
import { data } from './datasource.ts';
let piechart: AccumulationChart = new AccumulationChart({
    series: [
        {
            dataSource: [   { x: 'Chrome', y: 61.3, text: 'Chrome: 61.3%' },
            { x: 'Safari', y: 24.6, text: 'Safari: 24.6%' },
            { x: 'Edge', y: 5.0, text: 'Edge: 5.0%' },
            { x: 'Samsung Internet', y: 2.7, text:  'Samsung Internet: 2.7%' },
            { x: 'Firefox', y: 2.6, text: 'Firefox: 2.6%' },
            { x: 'Others', y: 3.6, text:  'Others: 3.6%' }],
            innerRadius: '65%',
            xName: 'x',
            yName: 'y'
        }
    ],
    centerLabel:{
        text : 'Mobile<br>Browsers<br>Statistics'
    }
}, '#element');
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<!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>

Hover text

The default text in the center label can be changed when the mouse pointer hovers over the pie and doughnut charts slice using the hoverTextFormat property.

Source
Preview
index.ts
index.html
Copied to clipboard
import { AccumulationChart } from '@syncfusion/ej2-charts';
import { data } from './datasource.ts';
let piechart: AccumulationChart = new AccumulationChart({
    series: [
        {
            dataSource: [   { x: 'Chrome', y: 61.3, text: 'Chrome: 61.3%' },
            { x: 'Safari', y: 24.6, text: 'Safari: 24.6%' },
            { x: 'Edge', y: 5.0, text: 'Edge: 5.0%' },
            { x: 'Samsung Internet', y: 2.7, text:  'Samsung Internet: 2.7%' },
            { x: 'Firefox', y: 2.6, text: 'Firefox: 2.6%' },
            { x: 'Others', y: 3.6, text:  'Others: 3.6%' }],
            innerRadius: '65%',
            xName: 'x',
            yName: 'y'
        }
    ],
    centerLabel:{
        text : 'Mobile<br>Browsers<br>Statistics',
        hoverTextFormat: '${point.x} <br> Browser Share <br> ${point.y}%'
    }
}, '#element');
Copied to clipboard
<!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>

Customization

Customize the center label text using the textStyle property.

Source
Preview
index.ts
index.html
Copied to clipboard
import { AccumulationChart } from '@syncfusion/ej2-charts';
import { data } from './datasource.ts';
let piechart: AccumulationChart = new AccumulationChart({
    series: [
        {
            dataSource: [   { x: 'Chrome', y: 61.3, text: 'Chrome: 61.3%' },
            { x: 'Safari', y: 24.6, text: 'Safari: 24.6%' },
            { x: 'Edge', y: 5.0, text: 'Edge: 5.0%' },
            { x: 'Samsung Internet', y: 2.7, text:  'Samsung Internet: 2.7%' },
            { x: 'Firefox', y: 2.6, text: 'Firefox: 2.6%' },
            { x: 'Others', y: 3.6, text:  'Others: 3.6%' }],
            innerRadius: '65%',
            xName: 'x',
            yName: 'y'
        }
    ],
    centerLabel:{
        text : 'Mobile<br>Browsers<br>Statistics',
        textStyle:{
            fontWeight: '900',
            size: '15px',
            color: 'grey',
            fontFamily: 'Roboto',
            fontStyle: 'Italic'
        }
    }
}, '#element');
Copied to clipboard
<!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>
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