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Accessibility in JavaScript ContextMenu control

23 Mar 2023 / 2 minutes to read

ARIA attributes

The web accessibility makes web content and web applications more accessible for people with disabilities. It especially helps in dynamic content change and development of advanced user interface controls with AJAX, HTML, JavaScript, and related technologies. ContextMenu provides built-in compliance with WAI-ARIA specifications. WAI-ARIA support is achieved through the attributes like aria-expanded and aria-haspopup applied for menu item in ContextMenu. It helps the people with disabilities by providing information about the widget for assistive technology in the screen readers. ContextMenu component contains the menu role and menuItem role.

Properties Functionality
menu This role will be specified for an item which have sub menu.
menuItem This role will be specified for an item that do not have sub menus.
aria-haspopup Indicates the availability and type of interactive popup element.
aria-expanded Indicates whether the subtree can be expanded or collapsed, as well as indicates whether its current state is expanded or collapsed.

Keyboard interaction

Keyboard shortcuts Actions
Esc Closes the opened ContextMenu.
Enter Selects the focused item.
Up Navigates up or to the previous menu item.
Down Navigates down or to the next menu item.
Left Close the current sub menu and navigates to the parent menu.
Right Navigates and open the next sub menu.
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import { ContextMenu, MenuItemModel, ContextMenuModel } from '@syncfusion/ej2-navigations';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

// Initialize menu items.
let menuItems: MenuItemModel[] = [
    {
        text: 'Cut',
        iconCss: 'e-db-icons e-cut'
    },
    {
        text: 'Copy',
        iconCss: 'e-icons e-copy'
    },
    {
        text: 'Paste',
        iconCss: 'e-db-icons e-paste',
        items: [
            {
                text: 'Paste Text',
                iconCss: 'e-cm-icons e-pastetext'
            },
            {
                text: 'Paste Special',
                iconCss: 'e-cm-icons e-pastespecial'
            } ]
    }];

// Initialize ContextMenu options.
let menuOptions: ContextMenuModel = {
        items: menuItems,
        target: '#target'
    };

// Initialize ContextMenu component.
let menuObj: ContextMenu = new ContextMenu(menuOptions, '#contextmenu');

// To open ContextMenu at specified position.
menuObj.open(40, 20);
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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 href="//cdn.syncfusion.com/ej2/20.4.48/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-lists/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-inputs/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/20.4.48/ej2-navigations/styles/material.css" rel="stylesheet" />
    <!--style reference from app-->
    <link href="styles.css" rel="stylesheet" />

    <!--system js reference and configuration-->
    <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'>
        <!--element which is going to render-->
        <div id="target">Right click / Touch hold to open the ContextMenu</div>
        <ul id="contextmenu"></ul>
    </div>
</body>

</html>
Copied to clipboard
/* csslint ignore:start */
@font-face {
  font-family: 'e-context-menu';
  src:
  url(data:application/x-font-ttf;charset=utf-8;base64,AAEAAAAKAIAAAwAgT1MvMjjNRVMAAAEoAAAAVmNtYXDicOK6AAABjAAAADhnbHlmGcEPFQAAAcwAAAMwaGVhZA69CA8AAADQAAAANmhoZWEH9AQEAAAArAAAACRobXR4DAAAAAAAAYAAAAAMbG9jYQDYAZgAAAHEAAAACG1heHABEgDAAAABCAAAACBuYW1lxY1d1QAABPwAAAKFcG9zdPJwcMoAAAeEAAAASAABAAAEAAAAAFwEAAAAAAADlwABAAAAAAAAAAAAAAAAAAAAAwABAAAAAQAAgmhm8l8PPPUACwQAAAAAANYD4Y8AAAAA1gPhjwAAAAADlwP0AAAACAACAAAAAAAAAAEAAAADALQABQAAAAAAAgAAAAoACgAAAP8AAAAAAAAAAQQAAZAABQAAAokCzAAAAI8CiQLMAAAB6wAyAQgAAAIABQMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAUGZFZABA4mDiYQQAAAAAXAQAAAAAAAABAAAAAAAABAAAAAQAAAAEAAAAAAAAAgAAAAMAAAAUAAMAAQAAABQABAAkAAAABAAEAAEAAOJh//8AAOJg//8AAAABAAQAAAABAAIAAAAAANgBmAAFAAAAAAOXA/QABAAlAC0ATgCzAAABIScHJzcVHwc/By8HDwYBFSE1MxEhESUHFQ8GLwc/Bx8GJysBDw4RHw4zITM/DhEvDisBLw4rAQ8NAUQBd1xAfr0BAwQGBwgICgkJCAcGBAMBAQMEBgcICQkKCAgHBgQD/qYB1l79jQFoAQMEBgcHCQkJCQgGBgQDAQEDBAYGCAkJCQkHBwYEA6y9CgkICQgHBwcGBQQEAwMBAQEBAwMDBQUGBwcHCAkICQoCeAoJCAkIBwcHBgUEBAMDAQEBAQMDAwUFBgcHBwgJCAkKvQQEBgUHBwcICQkJCgoKCwsLCwoKCgkJCQgHBwcFBgQBBYVRuh0FBQkIBwUFAgEBAgUFBwgJCgkJCAcGBAMBAQMEBgcICQEifX39LwLRMwQFCAgHBQUCAQECBQUHCAgJCQkIBwUEAwEBAwQFBwgJIgICAwQFBQYGBwgICAkJCf0pCQkJCAgIBwYGBQUEAwICAgIDBAUFBgYHCAgICQkJAtcJCQkICAgHBgYFBQQDAgIKCQkICAgHBgYFBAQDAgICAgMEBAUGBgcICAgJCQAFAAAAAAOXA/QABwAPABcAOACdAAABHwIjPwIDMzczFzMDIycVITUzESERJQcVDwYvBz8HHwYnKwEPDhEfDjMhMz8OES8OKwEvDisBDw0B/wQKK3MmBQ6dMyeHKDWCO90B1l79jQFoAQMEBgcHCQkJCQgGBgQDAQEDBAYGCAkJCQkHBwYEA6y9CgkICQgHBwcGBQQEAwMBAQEBAwMDBQUGBwcHCAkICQoCeAoJCAkIBwcHBgUEBAMDAQEBAQMDAwUFBgcHBwgJCAkKvQQEBgUHBwcICQkJCgoKCwsLCwoKCgkJCQgHBwcFBgQCFREigG4SM/6wd3cBe/t9ff0vAtEzBAUICAcFBQIBAQIFBQcICAkJCQgHBQQDAQEDBAUHCAkiAgIDBAUFBgYHCAgICQkJ/SkJCQkICAgHBgYFBQQDAgICAgMEBQUGBgcICAgJCQkC1wkJCQgICAcGBgUFBAMCAgoJCQgICAcGBgUEBAMCAgICAwQEBQYGBwgICAkJAAAAABIA3gABAAAAAAAAAAEAAAABAAAAAAABAA8AAQABAAAAAAACAAcAEAABAAAAAAADAA8AFwABAAAAAAAEAA8AJgABAAAAAAAFAAsANQABAAAAAAAGAA8AQAABAAAAAAAKACwATwABAAAAAAALABIAewADAAEECQAAAAIAjQADAAEECQABAB4AjwADAAEECQACAA4ArQADAAEECQADAB4AuwADAAEECQAEAB4A2QADAAEECQAFABYA9wADAAEECQAGAB4BDQADAAEECQAKAFgBKwADAAEECQALACQBgyBDb250ZXh0TWVudSAoMilSZWd1bGFyQ29udGV4dE1lbnUgKDIpQ29udGV4dE1lbnUgKDIpVmVyc2lvbiAxLjBDb250ZXh0TWVudSAoMilGb250IGdlbmVyYXRlZCB1c2luZyBTeW5jZnVzaW9uIE1ldHJvIFN0dWRpb3d3dy5zeW5jZnVzaW9uLmNvbQAgAEMAbwBuAHQAZQB4AHQATQBlAG4AdQAgACgAMgApAFIAZQBnAHUAbABhAHIAQwBvAG4AdABlAHgAdABNAGUAbgB1ACAAKAAyACkAQwBvAG4AdABlAHgAdABNAGUAbgB1ACAAKAAyACkAVgBlAHIAcwBpAG8AbgAgADEALgAwAEMAbwBuAHQAZQB4AHQATQBlAG4AdQAgACgAMgApAEYAbwBuAHQAIABnAGUAbgBlAHIAYQB0AGUAZAAgAHUAcwBpAG4AZwAgAFMAeQBuAGMAZgB1AHMAaQBvAG4AIABNAGUAdAByAG8AIABTAHQAdQBkAGkAbwB3AHcAdwAuAHMAeQBuAGMAZgB1AHMAaQBvAG4ALgBjAG8AbQAAAAACAAAAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMBAgEDAQQAD01UX1Bhc3RlU3BlY2lhbAxNVF9QYXN0ZVRleHQAAA==) format('truetype');
  font-weight: normal;
  font-style: normal;
}
/* csslint ignore:stop */

.e-cm-icons {
  font-family: 'e-context-menu';
  font-style: normal;
  font-variant: normal;
  font-weight: normal;
  line-height: 1;
  text-transform: none;
}

@font-face {
font-family: 'ddb-icons';
src:
url(data:application/x-font-ttf;charset=utf-8;base64,AAEAAAAKAIAAAwAgT1MvMj0gSRkAAAEoAAAAVmNtYXDnE+dkAAABlAAAADxnbHlmlh33NQAAAdwAAAJMaGVhZBKOK9sAAADQAAAANmhoZWEHeANwAAAArAAAACRobXR4E6AAAAAAAYAAAAAUbG9jYQGOAegAAAHQAAAADG1heHABEwBlAAABCAAAACBuYW1l1LBM9QAABCgAAAI9cG9zdMJntbUAAAZoAAAAUAABAAADUv9qAFoEAAAAAAADygABAAAAAAAAAAAAAAAAAAAABQABAAAAAQAAojXaQl8PPPUACwPoAAAAANfSc4gAAAAA19JziAAA//oDygPsAAAACAACAAAAAAAAAAEAAAAFAFkABAAAAAAAAgAAAAoACgAAAP8AAAAAAAAAAQPtAZAABQAAAnoCvAAAAIwCegK8AAAB4AAxAQIAAAIABQMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAUGZFZABA5wDnAwNS/2oAWgPsAJYAAAABAAAAAAAABAAAAAPoAAAD6AAAA+gAAAPoAAAAAAACAAAAAwAAABQAAwABAAAAFAAEACgAAAAEAAQAAQAA5wP//wAA5wD//wAAAAEABAAAAAEAAgADAAQAAAAAAI4AwgEAASYAAwAA//oDNQPsAA4AHQBYAAAlHgEOAScmJy4BNz4BMzIFFgYHBgcGLgE2NzYzMhYBHgEXDgEHDgEHDgIWFxYXFjY3NjQ3PgE3HgEXFhQXHgE3PgE3PgEuAScuAScuASc+ATc+AQcLASYWAVEfFxo6IBkNCQIHCy8bCQG9BwIJDRkgOhoXHwoKGi/+TR1RDyEOIxo+ExckFAQMFikwVhcMBwYlFRYkBwcMF1YwFCALDAQUIxcUPhojDiAOUR4cAQvEwwsB6gtDTycJCBsSKxYhJ0gWKxIaCQknUEILAycCf2TPI0w2HBUmDg0sOzsaKQ4ONzcniyYXNBgYNBcmiyc3OA8GHRQaOzssDQ4mFRw2TiLOZGdBA/5vAZEDQQAEAAAAAAOqA+kABQANABcAHwAAARUzFSERAyERIzUjNSEBIREhESMVITUjMyMVITUjNSMC733+iT8B9D4+/oj+igE4AXc//c4++j8BOT+7AbZ8+gF2/ksBdz4//ksB9AF2fHw+Pj8AAAIAAAAAA7cD6QACACQAAAEhEwMOAQcVITUmJyY1ND8BIRcWFxYVFAcGKwEVITUmJyYnASMCKP8AguQrOy0BGkIRHREkASstEgEEDhQxEQGaJxUcLP7PDAFNAVL+PHBHCBsbBgsUKR8wX3owBg4NFgsQGxsDFx1zAyMAAAACAAAAAAPKA+oAAgATAAABFxEBDgEHHgEXETMRMxEzETM1IQL+zP1abpADA5t0f2F+XP41AfbMAZgBJwmYcHSbA/48A2r8lgNqfgAAAAASAN4AAQAAAAAAAAABAAAAAQAAAAAAAQAJAAEAAQAAAAAAAgAHAAoAAQAAAAAAAwAJABEAAQAAAAAABAAJABoAAQAAAAAABQALACMAAQAAAAAABgAJAC4AAQAAAAAACgAsADcAAQAAAAAACwASAGMAAwABBAkAAAACAHUAAwABBAkAAQASAHcAAwABBAkAAgAOAIkAAwABBAkAAwASAJcAAwABBAkABAASAKkAAwABBAkABQAWALsAAwABBAkABgASANEAAwABBAkACgBYAOMAAwABBAkACwAkATsgZGRiLWljb25zUmVndWxhcmRkYi1pY29uc2RkYi1pY29uc1ZlcnNpb24gMS4wZGRiLWljb25zRm9udCBnZW5lcmF0ZWQgdXNpbmcgU3luY2Z1c2lvbiBNZXRybyBTdHVkaW93d3cuc3luY2Z1c2lvbi5jb20AIABkAGQAYgAtAGkAYwBvAG4AcwBSAGUAZwB1AGwAYQByAGQAZABiAC0AaQBjAG8AbgBzAGQAZABiAC0AaQBjAG8AbgBzAFYAZQByAHMAaQBvAG4AIAAxAC4AMABkAGQAYgAtAGkAYwBvAG4AcwBGAG8AbgB0ACAAZwBlAG4AZQByAGEAdABlAGQAIAB1AHMAaQBuAGcAIABTAHkAbgBjAGYAdQBzAGkAbwBuACAATQBlAHQAcgBvACAAUwB0AHUAZABpAG8AdwB3AHcALgBzAHkAbgBjAGYAdQBzAGkAbwBuAC4AYwBvAG0AAAAAAgAAAAAAAAAKAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFAQIBAwEEAQUBBgADY3V0CHBhc3RlXzAxBGZvbnQOcGFyYS1tYXJrLS0tMDMAAA==) format('truetype');
font-weight: normal;
font-style: normal;
}

.e-db-icons {
 font-family: 'ddb-icons' !important;
speak: none;
font-size: 55px;
font-style: normal;
font-weight: normal;
font-variant: normal;
text-transform: none;
line-height: 1;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}

.e-cut::before {
  content: '\e700';
}

.e-copy::before {
  content: '\e70a';
}

.e-paste::before {
  content: '\e701';
}

.e-pastespecial::before {
  content: '\e260';
}

.e-pastetext::before {
  content: '\e261';
}

#loader {
  color: #008cff;
  height: 40px;
  left: 45%;
  position: absolute;
  top: 45%;
  width: 30%;
}

#container {
  visibility: hidden;
}

#target {
  border: 1px dashed;
  height: 150px;
  padding: 10px;
  position: relative;
  text-align: justify;
  color: gray;
  user-select: none;
}
ContextMenu / Template and Multilevel nesting
ContextMenu / Styles and Appearances