Accessibility Features Overview
Accessibility Requirement | Support Level |
---|---|
Right-to-Left Support | |
Keyboard Navigation Support | |
Screen Reader Support | |
Contrast Color Theme | |
Mobile Device Support | |
Lighthouse Accessibility Validation | |
Axe Accessibility Validation | |
WAVE Accessibility Validation | |
Section 508 Support | |
WCAG 2.x Support |
- - All component features meet the requirement
- - Some component features may not meet the requirement
- - Accessibility requirement is not supported
Accessibility Standards Compliance
The DropDownButton component meets a variety of Section 508 and WCAG 2.x compliance standards. Known exceptions:
Section 508 criteria | WCAG 2.x criteria | Exception description |
---|---|---|
501 (Web)(Software) 504.2 (Authoring Tool) 602.3 (Support Docs) |
1.4.3 Contrast (Minimum) (Level AA) 1.4.11 Non-text Contrast (Level AA 2.1 and 2.2) |
DropDownButton does not support Windows High Contrast themes. |
Keyboard Navigation
A user can use the following keys to interact with the DropDownButton component:
Key | Action |
---|---|
← | Moves focus to the action button when splitButton is enabled. |
→ | Moves focus to the toggle button when splitButton is enabled. |
Enter / Space | Identical to a click. |
Selects a menu item when focused. | |
↑ / ↓ | Moves focus to the previous/following menu item. |
↓ | Opens the drop-down menu. |
Esc | Closes the drop-down menu. |
Page Up / Page Down | Moves focus to the first/last menu item on the page. |
Home / End | Moves focus to the first/last menu item. |
Use the registerKeyHandler(key, handler) method to implement a custom handler for a key.
jQuery
function registerKeyHandlers () { const dropDownButton = $("#dropDownButtonContainer").dxDropDownButton("instance"); dropDownButton.registerKeyHandler("backspace", function(e) { // The argument "e" contains information on the event }); dropDownButton.registerKeyHandler("space", function(e) { // ... }); }
Angular
import { ..., ViewChild, AfterViewInit } from '@angular/core'; import { DxDropDownButtonModule, DxDropDownButtonComponent } from 'devextreme-angular'; // ... export class AppComponent implements AfterViewInit { @ViewChild(DxDropDownButtonComponent, { static: false }) dropDownButton: DxDropDownButtonComponent; // Prior to Angular 8 // @ViewChild(DxDropDownButtonComponent) dropDownButton: DxDropDownButtonComponent; ngAfterViewInit () { this.dropDownButton.instance.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.dropDownButton.instance.registerKeyHandler('space', function(e) { // ... }); } } @NgModule({ imports: [ // ... DxDropDownButtonModule ], // ... })
Vue
<template> <DxDropDownButton :ref="myDropDownButtonRef" /> </template> <script> import 'devextreme/dist/css/dx.light.css'; import DxDropDownButton from 'devextreme-vue/drop-down-button'; const myDropDownButtonRef = 'my-drop-down-button'; export default { components: { DxDropDownButton }, data() { return { myDropDownButtonRef } }, computed: { dropDownButton: function() { return this.$refs[myDropDownButtonRef].instance; } }, mounted: function() { this.dropDownButton.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.dropDownButton.registerKeyHandler('space', function(e) { // ... }); } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.light.css'; import { DropDownButton } from 'devextreme-react/drop-down-button'; class App extends React.Component { constructor(props) { super(props); this.dropDownButtonRef = React.createRef(); } render() { return ( <DropDownButton ref={this.dropDownButtonRef} /> ); } get dropDownButton() { return this.dropDownButtonRef.current.instance(); } componentDidMount() { this.dropDownButton.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.dropDownButton.registerKeyHandler('space', function(e) { // ... }); } } export default App;
Screen Reader Support
The DropDownButton component supports screen readers and complies to WAI-ARIA standards.
If you have technical questions, please create a support ticket in the DevExpress Support Center.