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Dynamic badge content in React Badge component

08 Dec 2022 / 2 minutes to read

Badges in real-time needs to be updated dynamically based on the requirements. In this sample, using React states the badges content will be updated dynamically. Click the increment button to change the badge value.

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index.jsx
index.html
index.tsx
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import * as React from "react";
import * as ReactDOM from "react-dom";
import { ListViewComponent } from '@syncfusion/ej2-react-lists';
function BadgePortable(props) {
    return (<span className={props.BadgeType} style={{ float: 'right', marginTop: '16px', fontSize: '12px' }}>{props.BadgeContent} New
        </span>);
}
function App(props) {
    // Datasource for listview, badge field is the class data for Badges
    let dataSource = [
        { id: 'p_01', text: 'Primary', badge: 'e-badge e-badge-primary', icons: 'primary', type: 'Primary' },
        { id: 'p_02', text: 'Social', badge: 'e-badge e-badge-secondary', icons: 'social', type: 'Primary' },
        { id: 'p_03', text: 'Promotions', badge: 'e-badge e-badge-success', icons: 'promotion', type: 'Primary' },
        { id: 'p_04', text: 'Updates', badge: 'e-badge e-badge-info', icons: 'updates', type: 'Primary' },
        { id: 'p_05', text: 'Starred', badge: '', icons: 'starred', type: 'All Labels' },
        { id: 'p_06', text: 'Important', badge: 'e-badge e-badge-danger', icons: 'important', type: 'All Labels' },
        { id: 'p_07', text: 'Sent', badge: '', icons: 'sent', type: 'All Labels' },
        { id: 'p_08', text: 'Outbox', badge: '', icons: 'outbox', type: 'All Labels' },
        { id: 'p_09', text: 'Drafts', badge: 'e-badge e-badge-warning', icons: 'draft', type: 'All Labels' },
    ];
    // Map fields
    let fields = { groupBy: 'type' };
    let Values = {
        Primary: 3,
        Social: 27,
        Promotions: 7,
        Updates: 13,
        Drafts: 7,
        Important: 2
    };
    function listTemplate(data) {
        return (<div className='listWrapper' style={{ width: 'inherit', height: 'inherit' }}>
                <span className={`${data.icons} list_svg`}>&nbsp;</span>
                <span className='list_text'>{data.text}</span>
                {data.badge !== '' ?
            <BadgePortable BadgeContent={Values[data.text]} BadgeType={data.badge}/> : ''}
            </div>);
    }
    function onClick() {
        let badgeElements = Array.prototype.slice.call(document.getElementById('lists').getElementsByClassName('e-badge'));
        badgeElements.forEach((element) => {
            element.textContent = (Number(element.textContent.split(' ')[0])) + 1 + ' New';
        });
    }
    return (<div className="sample_container badge-list">
            
            <ListViewComponent id="lists" dataSource={dataSource} fields={fields} headerTitle='Inbox' showHeader={true} template={listTemplate.bind(this)}></ListViewComponent>
            <p className='crossline'></p>
            <span className='incr_button'>
                <button className='e-btn e-primary' onClick={onClick.bind(this)}>Increment Badge Count</button>
            </span>
        </div>);
}
export default App;
ReactDOM.render(<App />, document.getElementById("element"));
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>Essential JS 2 React Badge Sample</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Essential JS 2 for React Components" />
    <meta name="author" content="Syncfusion" />
    <link href="//cdn.syncfusion.com/ej2/20.3.56/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.3.56/ej2-notifications/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.3.56/ej2-react-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.3.56/ej2-react-buttons/styles/material.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="systemjs.config.js"></script>
    <link rel="stylesheet" href="index.css" />
    <style>
        #loader {
            color: #008cff;
            height: 40px;
            left: 45%;
            position: absolute;
            top: 45%;
            width: 30%;
        }
    </style>
</head>

<body>
    <div id='element'>
        <div id='loader'>Loading....</div></div>
</body>
</html>
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import * as React from "react";
import * as ReactDOM from "react-dom";
import { ListViewComponent } from '@syncfusion/ej2-react-lists';

interface IBadgeValuesProps {
    BadgeType: string;
    BadgeContent: string;
}
function BadgePortable(props:IBadgeValuesProps) {
    return (
        <span className={props.BadgeType}
            style={{ float: 'right', marginTop: '16px', fontSize: '12px' }}>{props.BadgeContent} New
        </span>
    );
}
interface IBadgeValues {
    Primary: number;
    Social: number;
    Promotions: number;
    Updates: number;
    Important: number;
    Drafts: number;
}
function App(props:IBadgeValues) {
    // Datasource for listview, badge field is the class data for Badges
    let dataSource: { [key: string]: Object }[] = [
        { id: 'p_01', text: 'Primary', badge: 'e-badge e-badge-primary', icons: 'primary', type: 'Primary' },
        { id: 'p_02', text: 'Social', badge: 'e-badge e-badge-secondary', icons: 'social', type: 'Primary' },
        { id: 'p_03', text: 'Promotions', badge: 'e-badge e-badge-success', icons: 'promotion', type: 'Primary' },
        { id: 'p_04', text: 'Updates', badge: 'e-badge e-badge-info', icons: 'updates', type: 'Primary' },
        { id: 'p_05', text: 'Starred', badge: '', icons: 'starred', type: 'All Labels' },
        { id: 'p_06', text: 'Important', badge: 'e-badge e-badge-danger', icons: 'important', type: 'All Labels' },
        { id: 'p_07', text: 'Sent', badge: '', icons: 'sent', type: 'All Labels' },
        { id: 'p_08', text: 'Outbox', badge: '', icons: 'outbox', type: 'All Labels' },
        { id: 'p_09', text: 'Drafts', badge: 'e-badge e-badge-warning', icons: 'draft', type: 'All Labels' },
    ];
    // Map fields
    let fields: object = { groupBy: 'type' };
    let Values = {
    Primary: 3,
    Social: 27,
    Promotions: 7,
    Updates: 13,
    Drafts: 7,
    Important: 2
    };
    function listTemplate(data: any): JSX.Element {
        return (
            <div className='listWrapper' style={{ width: 'inherit', height: 'inherit' }}>
                <span className={`${data.icons} list_svg`}>&nbsp;</span>
                <span className='list_text'>{data.text}</span>
                {
                    data.badge !== '' ?
                        <BadgePortable BadgeContent={Values[data.text]} BadgeType={data.badge} /> : ''
                }
            </div>
        );
    }

    function onClick(): void {
          let badgeElements = Array.prototype.slice.call(document.getElementById('lists').getElementsByClassName('e-badge'));
          badgeElements.forEach((element) => {
          element.textContent = (Number(element.textContent.split(' ')[0])) + 1 + ' New';
        })
    }
    return (
        <div className="sample_container badge-list">
            {/* Listview element */}
            <ListViewComponent id="lists" dataSource={dataSource} fields={fields} headerTitle='Inbox' showHeader={true} template={listTemplate.bind(this) as any}></ListViewComponent>
            <p className='crossline'></p>
            <span className='incr_button'>
                <button className='e-btn e-primary' onClick={onClick.bind(this)}>Increment Badge Count</button>
            </span>
        </div>
    );
}
export default App;
ReactDOM.render(<App />, document.getElementById("element"));