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Getting started with JavaScript Switch control

08 Apr 2021 / 3 minutes to read

This section explains how to create a simple Switch, and configure its available functionalities in TypeScript, using Essential JS 2 quickstart seed repository.

Dependencies

The following list of dependencies are required to use the Switch component in your application.

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|-- @syncfusion/ej2-buttons
    |-- @syncfusion/ej2-base

Setup your development environment

To get started with the Switch component, clone the Essential JS 2 quickstart project and install the npm packages by using the following commands.

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git clone https://github.com/syncfusion/ej2-quickstart.git quickstart
cd quickstart
npm install

The project is preconfigured with common settings (src/styles/styles.css, system.config.js) to start all the Essential JS 2 components.

[src/system.config.js]

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System.config({
paths: {
    'npm:': './node_modules/',
    'syncfusion:': 'npm:@syncfusion/'
},
map: {
    app: 'app',

    //Syncfusion packages mapping
    "@syncfusion/ej2-base": "syncfusion:ej2-base/dist/ej2-base.umd.min.js",
    "@syncfusion/ej2-data": "syncfusion:ej2-data/dist/ej2-data.umd.min.js",
    "@syncfusion/ej2-inputs": "syncfusion:ej2-inputs/dist/ej2-inputs.umd.min.js",
    "@syncfusion/ej2-buttons": "syncfusion:ej2-buttons/dist/ej2-buttons.umd.min.js",
    "@syncfusion/ej2-splitbuttons": "syncfusion:ej2-splitbuttons/dist/ej2-splitbuttons.umd.min.js",
    "@syncfusion/ej2-lists": "syncfusion:ej2-lists/dist/ej2-lists.umd.min.js",
    "@syncfusion/ej2-popups": "syncfusion:ej2-popups/dist/ej2-popups.umd.min.js",
    "@syncfusion/ej2-dropdowns": "syncfusion:ej2-dropdowns/dist/ej2-dropdowns.umd.min.js",
},
packages: {
    'app': { main: 'app', defaultExtension: 'js' }
}
});

System.import('app.ts').catch(console.error.bind(console)).then(function () {
document.getElementById('loader').style.display = "none";
document.getElementById('container').style.visibility = "visible";
});

Add Switch to the project

Add the HTML input tag with id attribute as the element to your index.html file.

[src/index.html]

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<!DOCTYPE html>
<html lang="en">

<head>
<title>Essential JS 2</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no" />
<meta name="description" content="Essential JS 2" />
<meta name="author" content="Syncfusion" />
<link rel="shortcut icon" href="resources/favicon.ico" />
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />

<!--style reference from app-->
<link href="/styles/styles.css" rel="stylesheet" />

<!--system js reference and configuration-->
<script src="node_modules/systemjs/dist/system.src.js" type="text/javascript"></script>
<script src="system.config.js" type="text/javascript"></script>
</head>

<body>
<div>
    <!--element which is going to render-->
    <input id="element" type="checkbox"/>
</div>

</body>

</html>

Import the Switch component in your app.ts file, and initialize it to #element as shown.

[src/app/app.ts]

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import { Switch } from '@syncfusion/ej2-buttons';

// Initialize Switch component with checked state.
let switchObj: Switch = new Switch({ checked: true });

// Render initialized Switch.
switchObj.appendTo('#element');

Adding Style sheet to the Application

To render DropDownButton component, need to import Button and its dependent components styles as given below in style.css.

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@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-buttons/styles/material.css";

Run the application

Run the application in the browser using the following command:

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npm start

The following example shows a basic Switch component.

Source
Preview
app.ts
index.html
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import { Switch } from '@syncfusion/ej2-buttons';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

// Initialize Switch component with checked state.
let switchObj: Switch = new Switch({ checked: true });

// Render initialized Switch.
switchObj.appendTo('#element');
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Switch</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="//cdn.syncfusion.com/ej2/ej2-base/styles/fabric.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="styles.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'>
        <input type='checkbox' id='element'/>
    </div>
</body>

</html>

Set text on Switch

This section explains how to set onLabel and offLabel texts on Switch. In the following example, onLabel is set as ON and offLabel is set as OFF.

Source
Preview
app.ts
index.html
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import { Switch } from '@syncfusion/ej2-buttons';

//Set text in switch toggle states.
let switchObj: Switch = new Switch({ onLabel: 'ON', offLabel: 'OFF', checked: true });
switchObj.appendTo('#switch1');
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<!DOCTYPE html>
<html lang="en">

<head>
    <title>EJ2 Switch</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="//cdn.syncfusion.com/ej2/ej2-base/styles/fabric.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/bootstrap.css" rel="stylesheet" />
    <link href="styles.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'>
        <input type="checkbox" id="switch1" />
    </div>
</body>

</html>

Switch does not have text support for material themes, and does not support long custom text.

See Also