JavaScript/jQuery RangeSlider - Accessibility

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 complies to all Section 508 and WCAG 2.x standards criteria.

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.