Accessibility Features Overview
NOTE
The overall accessibility level of your application depends on the RangeSlider features that you use.
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 RangeSlider 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) |
RangeSlider does not support Windows High Contrast themes. |
Keyboard Navigation
A user can use the following keys to interact with the RangeSlider component:
Key | Action |
---|---|
← / → | Decreases/increases the value of the focused handle by a step. |
Page Up / Page Down | Decreases/increases the value of the focused handle by a keyStep. |
Home / End | Sets the focused handle to the minimum/maximum value or to the value of the other handle. |
Tab / Shift + Tab | Switches between the handles. |
Use the registerKeyHandler(key, handler) method to implement a custom handler for a key.
jQuery
JavaScript
function registerKeyHandlers () { const rangeSlider = $("#rangeSliderContainer").dxRangeSlider("instance"); rangeSlider.registerKeyHandler("backspace", function(e) { // The argument "e" contains information on the event }); rangeSlider.registerKeyHandler("space", function(e) { // ... }); }
Angular
TypeScript
import { ..., ViewChild, AfterViewInit } from '@angular/core'; import { DxRangeSliderModule, DxRangeSliderComponent } from 'devextreme-angular'; // ... export class AppComponent implements AfterViewInit { @ViewChild(DxRangeSliderComponent, { static: false }) rangeSlider: DxRangeSliderComponent; // Prior to Angular 8 // @ViewChild(DxRangeSliderComponent) rangeSlider: DxRangeSliderComponent; ngAfterViewInit () { this.rangeSlider.instance.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.rangeSlider.instance.registerKeyHandler('space', function(e) { // ... }); } } @NgModule({ imports: [ // ... DxRangeSliderModule ], // ... })
Vue
<template> <DxRangeSlider :ref="myRangeSliderRef" /> </template> <script> import 'devextreme/dist/css/dx.light.css'; import DxRangeSlider from 'devextreme-vue/range-slider'; const myRangeSliderRef = 'my-range-slider'; export default { components: { DxRangeSlider }, data() { return { myRangeSliderRef } }, computed: { rangeSlider: function() { return this.$refs[myRangeSliderRef].instance; } }, mounted: function() { this.rangeSlider.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.rangeSlider.registerKeyHandler('space', function(e) { // ... }); } } </script>
React
App.js
import React from 'react'; import 'devextreme/dist/css/dx.light.css'; import { RangeSlider } from 'devextreme-react/range-slider'; class App extends React.Component { constructor(props) { super(props); this.rangeSliderRef = React.createRef(); } render() { return ( <RangeSlider ref={this.rangeSliderRef} /> ); } get rangeSlider() { return this.rangeSliderRef.current.instance(); } componentDidMount() { this.rangeSlider.registerKeyHandler('backspace', function(e) { // The argument "e" contains information on the event }); this.rangeSlider.registerKeyHandler('space', function(e) { // ... }); } } export default App;
Screen Reader Support
The RangeSlider component supports screen readers and complies to WAI-ARIA standards.
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