Last active
August 27, 2025 23:19
-
-
Save LcsGa/9336fc5240840c33eb9093eb8a554535 to your computer and use it in GitHub Desktop.
Debounce emitters, not signals
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| @Component({ | |
| ... | |
| template: `<input [(ngxDebounceInput)]="search" />` | |
| }) | |
| export class Example { | |
| readonly search = signal(''); | |
| } |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import { | |
| Directive, | |
| inject, | |
| ElementRef, | |
| input, | |
| numberAttribute, | |
| InjectionToken, | |
| type Provider, | |
| effect, | |
| } from '@angular/core'; | |
| import { outputFromObservable, toObservable } from '@angular/core/rxjs-interop'; | |
| import { isNil } from 'lodash-es'; | |
| import { switchMap, fromEvent, debounceTime, map } from 'rxjs'; | |
| type Config = { | |
| duration: number; | |
| }; | |
| const DEFAULT_CONFIG: Config = { | |
| duration: 300, | |
| }; | |
| const DEBOUNCE_INPUT_DEFAULT_CONFIG = new InjectionToken<Config>('DebounceInput default config', { | |
| providedIn: 'root', | |
| factory: () => DEFAULT_CONFIG, | |
| }); | |
| export function provideDefaultDebounceInputConfig(config: Partial<Config>): Provider { | |
| return { provide: DEBOUNCE_INPUT_DEFAULT_CONFIG, useValue: { ...DEFAULT_CONFIG, ...config } }; | |
| } | |
| @Directive({ | |
| selector: 'input[ngxDebounceInput], select[ngxDebounceInput], textarea[ngxDebounceInput]', | |
| }) | |
| export class DebounceInput { | |
| private readonly config = inject(DEBOUNCE_INPUT_DEFAULT_CONFIG); | |
| private readonly el = inject(ElementRef).nativeElement as HTMLInputElement; | |
| readonly value = input.required<string | number | boolean | undefined | null>({ alias: 'ngxDebounceInput' }); | |
| readonly duration = input(this.config.duration, { alias: 'ngxDebounceInputDuration', transform: numberAttribute }); | |
| readonly valueChange = outputFromObservable( | |
| toObservable(this.duration).pipe( | |
| switchMap((duration) => | |
| fromEvent(this.el, 'input').pipe( | |
| debounceTime(duration), | |
| map(() => this.el.value), | |
| ), | |
| ), | |
| ), | |
| { alias: 'ngxDebounceInputChange' }, | |
| ); | |
| private readonly updateInputValue = effect(() => { | |
| const value = this.value(); | |
| this.el.value = isNil(value) ? '' : String(value); | |
| }); | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment