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Getting started with JavaScript Accordion control

08 May 2023 / 4 minutes to read

This section briefly explains about how to create a simple Accordion using TypeScript and configure the Accordion items using Essential JS 2 quickstart  seed repository.

Dependencies

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

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|-- @syncfusion/ej2-navigations
    |-- @syncfusion/ej2-base

Installation and configuration

  • Clone the Essential JS 2 quickstart application project from GitHub, and install necessary npm packages using the following command.
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git clone https://github.com/syncfusion/ej2-quickstart.git quickstart
cd quickstart
npm install

By default, the project is configured with all the Essential JS 2 dependencies. For better understanding, remove all the dependencies from src/system.config.js to get started with the Accordion component.

[src/system.config.js]

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

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

System.import('app');
  • The Accordion CSS files are available in the ej2-navigations package folder. This can be referenced in your application using the following code.

[src/styles/styles.css]

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@import '../../node_modules/@syncfusion/ej2-base/styles/material.css';
@import '../../node_modules/@syncfusion/ej2-navigations/styles/material.css';

Initialize the Accordion using Items

The Accordion can be rendered by defining an array of items.

  • Add the HTML div tag with its id attribute as element in your index.html file to initialize the Accordion.

[src/index.html]

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

<head>
<title>Essential JS 2 Accordion</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 style="margin: 50px;">
    <!--element which is going to render-->
    <div id="element"></div>
</div>

</body>

</html>
  • Import the Accordion component to your app.ts file and initialize it to the #element as shown below.

[src/app/app.ts]

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import { Accordion } from '@syncfusion/ej2-navigations';

// Initialize Accordion component
let accordion: Accordion = new Accordion({
items: [
  { header: 'ASP.NET', content: 'Microsoft ASP.NET is a set of technologies in the Microsoft .NET Framework for building Web applications and XML Web services.' },
  { header: 'ASP.NET MVC', content: 'The Model-View-Controller (MVC) architectural pattern separates an application into three main components: the model, the view, and the controller.' },
  { header: 'JavaScript', content: 'JavaScript (JS) is an interpreted computer programming language. It was originally implemented as part of web browsers so that client-side scripts could interact with the user, control the browser, communicate asynchronously, and alter the document content that was displayed.' },
]
});

// Render initialized Accordion
accordion.appendTo('#element');
  • Run the application in the browser using the following command.
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npm start

Output will be as follows:

Source
Preview
index.ts
index.html
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import {Accordion} from '@syncfusion/ej2-navigations';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);
let accordion: Accordion = new Accordion({
items: [
  { header: 'ASP.NET', expanded: 'true', content: 'Microsoft ASP.NET is a set of technologies in the Microsoft .NET Framework for building Web applications and XML Web services.' },
  { header: 'ASP.NET MVC', content: 'The Model-View-Controller (MVC) architectural pattern separates an application into three main components: the model, the view, and the controller.' },
  { header: 'JavaScript', content: 'JavaScript (JS) is an interpreted computer programming language. It was originally implemented as part of web browsers so that client-side scripts could interact with the user, control the browser, communicate asynchronously, and alter the document content that was displayed.' },
]
});
accordion.appendTo('#element');
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<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>Essential JS 2 Accordion</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Toolbar Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/21.2.3/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>
</head>

<body>
    <div id='loader'>LOADING....</div>
    <div id='container'>
        <div id='element'></div>
        <br/><br/>
        <div id='result'></div>
    </div>
</body>

</html>

In the above sample code, #element is the id of the HTML element in a page to which the Accordion is initialized.

Initialize the Accordion using HTML elements

The Accordion component can be rendered based on the given HTML element using id as target property. You need to follow the below structure of HTML elements to render the Accordion.

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  <div id='accordion_html_markup'>   --> Root Accordion Element
   <div>      --> Accordion Item Container
        <div>   --> Accordion Header Container
            <div> </div> --> Accordion Header
        </div>
        <div>  --> Accordion Panel Container
            <div> </div> --> Accordion Content
         </div>
    </div>
  </div>
Source
Preview
index.ts
index.html
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import {Accordion} from '@syncfusion/ej2-navigations';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);
let accordion: Accordion = new Accordion({});
accordion.appendTo('#accordion_html_markup');
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<!DOCTYPE html>
<html lang="en">

<head>
            
    <title>Essential JS 2 Accordion</title>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta name="description" content="Typescript Toolbar Controls" />
    <meta name="author" content="Syncfusion" />
    <link href="index.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/21.2.3/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>
</head>

<body>
    <div id='loader'>LOADING....</div>
    <div id='container'>
        <div id='accordion_html_markup'>
            <div>
                <div>
                    <div> ASP.NET </div>
                </div>
                <div>
                    <div> Microsoft ASP.NET is a set of technologies in the Microsoft .NET Framework for building Web applications
                        and XML Web services </div>
                </div>
            </div>
            <div>
                <div>
                    <div> ASP.NET MVC </div>
                </div>
                <div>
                    <div> The Model-View-Controller (MVC) architectural pattern separates an application into three main components:
                        the model, the view, and the controller </div>
                </div>
            </div>
            <div>
                <div>
                    <div> JavaScript </div>
                </div>
                <div>
                    <div> JavaScript (JS) is an interpreted computer programming language.It was originally implemented as part
                        of web browsers so that client-side scripts could interact with the user, control the browser </div>
                </div>
            </div>
        </div>
        <br/><br/>
        <div id='result'></div>
    </div>
</body>

</html>

You can add the custom class into Accordion component using cssClass property which is used to customize the Accordion component.

See Also

N> You can refer to our JavaScript Accordion feature tour page for its groundbreaking feature representations. You can also explore our JavaScript Accordion example that shows you how to render the Accordion in JavaScript.

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