JavaScript/jQuery DateRangeBox - Accessibility

Accessibility Features Overview

NOTE

The overall accessibility level of your application depends on the DateRangeBox 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 DateRangeBox component complies to all Section 508 and WCAG 2.x standards criteria except the following:

Section 508 criteria	WCAG 2.x criteria	Exception description
-	1.3.1 Info and Relationships (Level A)	DateRangeBox does not pronounce selected range in multiselect mode.

Keyboard Navigation

A user can use the following keys to interact with the DateRangeBox component:

Value Picker Type	Key	Action
Input Field	Alt + ↓	Opens the date/time picker.
Input Field	Alt + ↑ / Esc	Closes the date/time picker.
Calendar	← → ↑ ↓	Moves focus to the day nearby.
	Page Up or Ctrl + ←	Displays the previous month.
	Page Down or Ctrl + →	Displays the next month.
	Enter	Selects the focused day.
	Ctrl + ↑	Increases zoomLevel.
	Ctrl + ↓	Decreases zoomLevel.
	Home	Moves focus to the first date in the view.
	End	Moves focus to the last date in the view.

Use the registerKeyHandler(key, handler) method to implement a custom handler for a key.

jQuery

JavaScript

function registerKeyHandlers () {
    const dateRangeBox = $("#dateRangeBoxContainer").dxDateRangeBox("instance");
    dateRangeBox.registerKeyHandler("backspace", function(e) {
        // The argument "e" contains information on the event
    });
    dateRangeBox.registerKeyHandler("space", function(e) {
        // ...
    });
}

Angular

TypeScript

import { ..., ViewChild, AfterViewInit } from '@angular/core';
import { DxDateRangeBoxModule, DxDateRangeBoxComponent } from 'devextreme-angular';
// ...
export class AppComponent implements AfterViewInit {
    @ViewChild(DxDateRangeBoxComponent, { static: false }) dateRangeBox: DxDateRangeBoxComponent;
    // Prior to Angular 8
    // @ViewChild(DxDateRangeBoxComponent) dateRangeBox: DxDateRangeBoxComponent;

    ngAfterViewInit () {
        this.dateRangeBox.instance.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information on the event
        });
        this.dateRangeBox.instance.registerKeyHandler('space', function(e) {
            // ...
        });
    }
}
@NgModule({
    imports: [
        // ...
        DxDateRangeBoxModule
    ],
    // ...
})

Vue

<template>
    <DxDateRangeBox :ref="myDateRangeBoxRef" />
</template>
<script>
import 'devextreme/dist/css/dx.light.css';

import DxDateRangeBox from 'devextreme-vue/date-range-box';

const myDateRangeBoxRef = 'my-date-range-box';

export default {
    components: {
        DxDateRangeBox
    },
    data() {
        return {
            myDateRangeBoxRef
        }
    },
    computed: {
        dateRangeBox: function() {
            return this.$refs[myDateRangeBoxRef].instance;
        }
    },
    mounted: function() {
        this.dateRangeBox.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information on the event
        });
        this.dateRangeBox.registerKeyHandler('space', function(e) {
            // ...
        });
    }
}
</script>

React

App.js

import React from 'react';
import 'devextreme/dist/css/dx.light.css';

import { DateRangeBox } from 'devextreme-react/date-range-box';

class App extends React.Component {
    constructor(props) {
        super(props);

        this.dateRangeBoxRef = React.createRef();
    }

    render() {
        return (
            <DateRangeBox ref={this.dateRangeBoxRef} />
        );
    }

    get dateRangeBox() {
        return this.dateRangeBoxRef.current.instance;
    }

    componentDidMount() {
        this.dateRangeBox.registerKeyHandler('backspace', function(e) {
            // The argument "e" contains information on the event
        });
        this.dateRangeBox.registerKeyHandler('space', function(e) {
            // ...
        });
    }
}

export default App;

Screen Reader Support

The DateRangeBox component supports screen readers and complies to WAI-ARIA standards.

To improve accessibility, use the startDateInputAttr and endDateInputAttr properties to specify aria-label for the component. You do not need to specify aria-label if you use startDateLabel or endDateLabel correspondingly.