DevExtreme jQuery/JS - Keyboard Support

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

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 widget.
↑ / ↓ 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.

jQuery
JavaScript
function registerKeyHandlers () {
    let selectBox =  $("#selectBoxContainer").dxSelectBox("instance");
    selectBox.registerKeyHandler("backspace", function (e) {
        // The argument "e" contains information on the event
    });
    selectBox.registerKeyHandler("space", function (e) {
        // ...
    });
}
Angular
TypeScript
import { ..., ViewChild, AfterViewInit } from "@angular/core";
import { DxSelectBoxModule, DxSelectBoxComponent } from "devextreme-angular";
// ...
export class AppComponent implements AfterViewInit {
    @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