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Accessibility in React DropDownButton component

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. DropDownButton provides built-in compliance with WAI-ARIA specifications.WAI-ARIA support is achieved through the attributes like aria-expanded, aria-owns and aria-haspopup applied for action item in DropDownButton. It helps the people with disabilities by providing information about the widget for assistive technology in the screen readers. DropDownButton component contains the menu role and menuItem role.

Properties Functionality
menu This role will be specified for an DropDownButton element.
menuItem This role will be specified for an action items.
aria-haspopup Indicates the availability and type of interactive dropdown popup element.
aria-expanded Indicates whether the dropdown popup can be expanded or collapsed, as well as indicates whether its current state is expanded or collapsed.
aria-owns Identifies an elements in order to define a visual, functional, or contextual parent/child relationship between DOM elements where the DOM hierarchy cannot be used to represent the relationship.

Keyboard interaction

Keyboard shortcuts Actions
Esc Closes the opened popup.
Enter Opens the popup, or activates the highlighted item and closes the popup.
Space Opens the popup.
Up Navigates up or to the previous action item.
Down Navigates down or to the next action item.
Alt + Up Arrow Closes the popup.
Alt + Down Arrow Opens the popup
Source
Preview
app.tsx
index.html
styles.css
app.jsx
import { enableRipple } from '@syncfusion/ej2-base';
import { DropDownButtonComponent, ItemModel } from '@syncfusion/ej2-react-splitbuttons';
import * as React from 'react';
import * as ReactDom from 'react-dom';

enableRipple(true);

// To render DropDownButton.
class App extends React.Component<{}, {}> {

  public items: ItemModel[] = [
    {
        text: 'Cut',
        iconCss: 'e-db-icons e-cut'
    },
    {
        text: 'Copy',
        iconCss: 'e-icons e-copy'
    },
    {
        text: 'Paste',
        iconCss: 'e-db-icons e-paste'
    },
    {
        separator: true
    },
    {
        text: 'Font',
        iconCss: 'e-db-icons e-font'
    },
    {
        text: 'Paragraph',
        iconCss: 'e-db-icons e-paragraph'
    }];

  public render() {
    return (
      <div>
         <DropDownButtonComponent items = {this.items} iconCss= 'e-icons e-edit'> Edit </DropDownButtonComponent>
      </div>
    );
  }
}
ReactDom.render(<App />,document.getElementById('button'));
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Syncfusion React DropDownButton</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/ej2-base/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet" />
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/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='button'>
            <div id='loader'>Loading....</div>
        </div>
</body>

</html>
/* csslint ignore:start */
@font-face {
  font-family: 'e-dropdown-btn';
  src:
  url(data:application/x-font-ttf;charset=utf-8;base64,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) format('truetype');
  font-weight: normal;
  font-style: normal;
}
/* csslint ignore:stop */

.e-ddb-icons {
  font-family: 'e-dropdown-btn';
  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,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) 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;
}

#container {
    visibility: hidden;
}

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

.e-edit::before {
  content: '\ea9a';
}

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

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

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

.e-font::before {
  content: '\e702';
}

.e-paragraph::before {
  content: '\e703';
}

button {
  margin: 25px 5px 20px 20px;
}
import { enableRipple } from '@syncfusion/ej2-base';
import { DropDownButtonComponent } from '@syncfusion/ej2-react-splitbuttons';
import * as React from 'react';
import * as ReactDom from 'react-dom';
enableRipple(true);
// To render DropDownButton.
class App extends React.Component {
    constructor() {
        super(...arguments);
        this.items = [
            {
                text: 'Cut',
                iconCss: 'e-db-icons e-cut'
            },
            {
                text: 'Copy',
                iconCss: 'e-icons e-copy'
            },
            {
                text: 'Paste',
                iconCss: 'e-db-icons e-paste'
            },
            {
                separator: true
            },
            {
                text: 'Font',
                iconCss: 'e-db-icons e-font'
            },
            {
                text: 'Paragraph',
                iconCss: 'e-db-icons e-paragraph'
            }
        ];
    }
    render() {
        return (<div>
         <DropDownButtonComponent items={this.items} iconCss='e-icons e-edit'> Edit </DropDownButtonComponent>
      </div>);
    }
}
ReactDom.render(<App />, document.getElementById('button'));
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