Angular DropDownButton - Keyboard Support
An end user can use the following keys to interact with the UI 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 | Opens the drop-down menu when the toggle button is focused. |
Simulates a click action when the action button is focused. | |
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. |
You can implement a custom handler for a key using the registerKeyHandler(key, handler) method.
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
- ],
- // ...
- })
See Also
- Call Methods: Angular | Vue | React | jQuery | AngularJS | Knockout
- DropDownButton Demos
- DropDownButton API Reference
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