Angular Tabs - Accessibility

Accessibility Features Overview

NOTE

The overall accessibility level of your application depends on the Tabs 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 Tabs 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) 1.4.13 Content on Hover or Focus (Level AA 2.1 only)	The component does not supply information about a focused tab item.

Keyboard Navigation

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

Key	Action
← ↑ or PageUp	Moves focus to the previous tab.
→ ↓ or PageDown	Moves focus to the next tab.
Home	Moves focus to the first tab.
End	Moves focus to the last tab.
Enter or Space	Selects the tab. Available only if selectionMode is set to 'multiple'.
Shift + Mouse Wheel	Scrolls the tabs left/right if the scrollingEnabled property is true.

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

jQuery

JavaScript

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

Angular

TypeScript

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

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

Vue

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

import DxTabs from 'devextreme-vue/tabs';

const myTabsRef = 'my-tabs';

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

React

App.js

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

import { Tabs } from 'devextreme-react/tabs';

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

        this.tabsRef = React.createRef();
    }

    render() {
        return (
            <Tabs ref={this.tabsRef} />
        );
    }

    get tabs() {
        return this.tabsRef.current.instance;
    }

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

export default App;

Screen Reader Support

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