DevExtreme Angular - Keyboard Support

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

Key Action
↑ or mouse wheel up Increases the widget value by a step.
↓ or mouse wheel down Decreases the widget value by a step.

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

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