Angular Popup - Accessibility

Accessibility Features Overview

NOTE
The overall accessibility level of your application depends on the Popup 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 Popup 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)
Popup does not support Windows High Contrast themes.
501 (Web)(Software)
504.2 (Authoring Tool)
602.3 (Support Docs)
4.1.2 Name, Role, Value (Level A) Pressing drag arrows does not work when NVDA is enabled.

Keyboard Navigation

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

Key Action
↑ → ↓ ← Drags the popup when it is focused and dragEnabled is true.
Esc Closes the popup.

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

TypeScript
  • import { ..., ViewChild, AfterViewInit } from '@angular/core';
  • import { DxPopupModule, DxPopupComponent } from 'devextreme-angular';
  • // ...
  • export class AppComponent implements AfterViewInit {
  • @ViewChild(DxPopupComponent, { static: false }) popup: DxPopupComponent;
  • // Prior to Angular 8
  • // @ViewChild(DxPopupComponent) popup: DxPopupComponent;
  •  
  • ngAfterViewInit () {
  • this.popup.instance.registerKeyHandler('backspace', function(e) {
  • // The argument "e" contains information on the event
  • });
  • this.popup.instance.registerKeyHandler('space', function(e) {
  • // ...
  • });
  • }
  • }
  • @NgModule({
  • imports: [
  • // ...
  • DxPopupModule
  • ],
  • // ...
  • })

Screen Reader Support

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

The default Popup ARIA role is the non-modal dialog. If you use Popup as a modal, enable the aria-modal attribute as follows:

app.component.html
app.component.ts
  • <dx-popup ...
  • (onShowing)="onShowingHandler($event)"
  • >
  • </dx-popup>
  • import { Component } from "@angular/core";
  •  
  • @Component({
  • selector: 'app-root',
  • templateUrl: './app.component.html',
  • styleUrls: ['./app.component.css']
  • })
  • export class AppComponent {
  • onShowingHandler(e) {
  • const overlayContent = e.component.content().parentElement;
  • overlayContent.setAttribute("aria-modal", "true");
  • }
  • }

You can also use this method to specify aria-label for the component:

app.component.html
app.component.ts
  • <dx-popup ...
  • (onShowing)="onShowingHandler($event)"
  • >
  • </dx-popup>
  • import { Component } from "@angular/core";
  •  
  • @Component({
  • selector: 'app-root',
  • templateUrl: './app.component.html',
  • styleUrls: ['./app.component.css']
  • })
  • export class AppComponent {
  • onShowingHandler(e) {
  • const overlayContent = e.component.content().parentElement;
  • overlayContent.setAttribute("aria-label", "Dialog window");
  • }
  • }