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 SelectBox component complies to all Section 508 and WCAG 2.x standards criteria.
Keyboard Navigation
A user can use the following keys to interact with the SelectBox component:
Key | Action |
---|---|
Alt + ↓ | Opens the drop-down list. |
Alt + ↑ | Closes the drop-down list. |
Esc | Closes the drop-down list and removes focus from the UI component. |
↑ / ↓ | If the drop-down list is opened, moves focus to the previous/next item; otherwise, selects the previous/next item. |
Page Up / Page Down | Moves focus to the first/last item. |
Enter or Space | Selects the item. |
Use the registerKeyHandler(key, handler) method to implement a custom handler for a key.
jQuery
function registerKeyHandlers () { const selectBox = $("#selectBoxContainer").dxSelectBox("instance"); selectBox.registerKeyHandler("backspace", function(e) { // The argument "e" contains information on the event }); selectBox.registerKeyHandler("space", function(e) { // ... }); }
Angular
import { ..., ViewChild, AfterViewInit } from '@angular/core'; import { DxSelectBoxModule, DxSelectBoxComponent } from 'devextreme-angular'; // ... export class AppComponent implements AfterViewInit { @ViewChild(DxSelectBoxComponent, { static: false }) selectBox: DxSelectBoxComponent; // Prior to Angular 8 // @ViewChild(DxSelectBoxComponent) selectBox: DxSelectBoxComponent; ngAfterViewInit () { this.selectBox.instance.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.selectBox.instance.registerKeyHandler('space', function(e) { // ... }); } } @NgModule({ imports: [ // ... DxSelectBoxModule ], // ... })
Vue
<template> <DxSelectBox :ref="mySelectBoxRef" /> </template> <script> import 'devextreme/dist/css/dx.light.css'; import DxSelectBox from 'devextreme-vue/select-box'; const mySelectBoxRef = 'my-select-box'; export default { components: { DxSelectBox }, data() { return { mySelectBoxRef } }, computed: { selectBox: function() { return this.$refs[mySelectBoxRef].instance; } }, mounted: function() { this.selectBox.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.selectBox.registerKeyHandler('space', function(e) { // ... }); } } </script>
React
import React from 'react'; import 'devextreme/dist/css/dx.light.css'; import { SelectBox } from 'devextreme-react/select-box'; class App extends React.Component { constructor(props) { super(props); this.selectBoxRef = React.createRef(); } render() { return ( <SelectBox ref={this.selectBoxRef} /> ); } get selectBox() { return this.selectBoxRef.current.instance; } componentDidMount() { this.selectBox.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.selectBox.registerKeyHandler('space', function(e) { // ... }); } } export default App;
Screen Reader Support
The SelectBox component supports screen readers and complies to WAI-ARIA standards.
To improve accessibility, use the inputAttr property to specify aria-label for the component. You do not need to specify aria-label
if you use label.
If you have technical questions, please create a support ticket in the DevExpress Support Center.