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 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)	Tabs do not support Windows High Contrast themes.

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 Space	Selects the focused tab.
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.