Angular SelectBox - Keyboard Support

An end user can use the following keys to interact with the UI component.

Key Action
Alt + ↓ Opens the drop-down list.
Alt + ↑ Closes the drop-down list.
Esc Closes the drop-down list and removes focus from the UI component.
↑ / ↓ If the drop-down list is opened, moves focus to the previous/next item; otherwise, selects the previous/next item.
Page Up / Page Down Moves focus to the first/last item.
Enter or Space Selects the item.

You can implement a custom handler for a key using the registerKeyHandler(key, handler) method.

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