Angular DropDownBox - Accessibility

Accessibility Features Overview

NOTE
The overall accessibility level of your application depends on the DropDownBox 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 DropDownBox 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)
DropDownBox does not support Windows High Contrast themes.

Keyboard Navigation

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

Key Action
Alt + ↓ Opens the drop-down field.

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

TypeScript
  • import { ..., ViewChild, AfterViewInit } from '@angular/core';
  • import { DxDropDownBoxModule, DxDropDownBoxComponent } from 'devextreme-angular';
  • // ...
  • export class AppComponent implements AfterViewInit {
  • @ViewChild(DxDropDownBoxComponent, { static: false }) dropDownBox: DxDropDownBoxComponent;
  • ngAfterViewInit () {
  • this.dropDownBox.instance.registerKeyHandler('backspace', function(e) {
  • // The argument "e" contains information on the event
  • });
  • this.dropDownBox.instance.registerKeyHandler('escape', function(e) {
  • this.dropDownBox.instance.option('opened', false);
  • });
  • }
  • }
  • @NgModule({
  • imports: [
  • // ...
  • DxDropDownBoxModule
  • ],
  • // ...
  • })

Screen Reader Support

The DropDownBox component supports screen readers and complies to WAI-ARIA standards. Known exceptions are listed in the Accessibility Standards Compliance topic.

To improve accessibility, use the inputAttr property to specify aria-label for the component. You do not need to specify aria-label if you use label.