JavaScript (ES5)
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Accessibility in JavaScript (ES5) Accordion control

The Accordion component has been designed keeping in mind the WAI-ARIA specifications, by applying the prompt WAI-ARIA roles, states, and properties along with the keyboard support. Thus, making it usable for people who use assistive WAI-ARIA Accessibility supports that is achieved through the attributes like aria-multiselectable, aria-disabled, aria-expanded, aria-selected, and aria-hidden. It helps to provides information about the elements in a document for assistive technology. The component implements the keyboard navigation support by following the WAI-ARIA practices and tested in major screen readers.

ARIA attributes

Property Functionality
role presentation:
      It indicates that the element is used to control presentation. This attribute is added to the Accordion element describing the actual role of the element.
heading:
      It identifies the element as a heading that serves as an Accordion header. This attribute is added to all the Accordion header elements describing the actual role of the element.
aria-multiselectable It indicates the expand mode in the Accordion. Default value of this attribute is true. If expand mode value is changed as ‘single’, the attribute value changes to false.
aria-disabled It indicates the disabled state of the Accordion and its items.
aria-expanded It indicates the expand state of the Accordion Item. Default value of this attribute is false. If an item is expanded, the attribute value changes to ‘true’.
aria-selected It indicates the Selection state of the Accordion Item. Default value of this attribute is false. If an item is expanded, the attribute value changes to ‘true’.
aria-hidden It indicates the content visible state of the Accordion Item. Default value of this attribute is true. If an item content is visible, the attribute value changes to ‘false`.
aria-labelledby Attribute is set to content (panel) and it points to the corresponding Accordion header.
aria-controls Attribute is set to the header and it points to the corresponding Accordion content.
aria-level It defines the hierarchical level of an Accordion element with its inner level.

Keyboard interaction

Keyboard navigation is enabled by default. Possible keys are:

Key Description
Space or Enter When focus is on the Accordion header, click on the focused element makes the element to expand and collapse.
Down Arrow Focus the next Accordion header.
Up Arrow Focus the previous Accordion header.
Home Focus the first Accordion header.
End Focus the last Accordion header.
Source
Preview
index.js
index.html
ej.base.enableRipple(true);

//Initialize Accordion component

var accordion = new ej.navigations.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.' },
    ]
});

//Render initialized Accordion component
accordion.appendTo('#element');
<!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/material.css" rel="stylesheet">
    
    
<script src="https://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="element"></div>
        <br><br>
        <div id="result"></div>
    </div>


<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>
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