Accessibility Features Overview
NOTE
The overall accessibility level of your application depends on the DropDownDropDownButton features 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 DropDownButton 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) |
DropDownButton does not support Windows High Contrast themes. |
Keyboard Navigation
A user can use the following keys to interact with the DropDownButton component:
Key | Action |
---|---|
← | Moves focus to the action button when splitButton is enabled. |
→ | Moves focus to the toggle button when splitButton is enabled. |
Enter / Space | Identical to a click. |
Selects a menu item when focused. | |
↑ / ↓ | Moves focus to the previous/following menu item. |
↓ | Opens the drop-down menu. |
Esc | Closes the drop-down menu. |
Page Up / Page Down | Moves focus to the first/last menu item on the page. |
Home / End | Moves focus to the first/last menu item. |
Use the registerKeyHandler(key, handler) method to implement a custom handler for a key.
TypeScript
- import { ..., ViewChild, AfterViewInit } from '@angular/core';
- import { DxDropDownButtonModule, DxDropDownButtonComponent } from 'devextreme-angular';
- // ...
- export class AppComponent implements AfterViewInit {
- @ViewChild(DxDropDownButtonComponent, { static: false }) dropDownButton: DxDropDownButtonComponent;
- // Prior to Angular 8
- // @ViewChild(DxDropDownButtonComponent) dropDownButton: DxDropDownButtonComponent;
- ngAfterViewInit () {
- this.dropDownButton.instance.registerKeyHandler('backspace', function(e) {
- // The argument "e" contains information on the event
- });
- this.dropDownButton.instance.registerKeyHandler('space', function(e) {
- // ...
- });
- }
- }
- @NgModule({
- imports: [
- // ...
- DxDropDownButtonModule
- ],
- // ...
- })
Screen Reader Support
The DropDownButton component supports screen readers and complies to WAI-ARIA standards.
Feel free to share topic-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
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