debounceTime

signature: debounceTime(dueTime: number, scheduler: Scheduler): Observable

Discard emitted values that take less than the specified time between output

:bulb: This operator is popular in scenarios such as type-ahead where the rate of user input must be controlled!

Examples

Example 1: Debouncing based on time between input

( StackBlitz )

// RxJS v6+
import { fromEvent } from 'rxjs';
import { debounceTime, map } from 'rxjs/operators';

// elem ref
const searchBox = document.getElementById('search');

// streams
const keyup$ = fromEvent(searchBox, 'keyup');

// wait .5s between keyups to emit current value
keyup$
  .pipe(
    map((i: any) => i.currentTarget.value),
    debounceTime(500)
  )
  .subscribe(console.log);

Related Recipes

• [Save Indicator]('../../recipes/save-indicator.md)

• Type Ahead

Additional Resources

• debounceTime :newspaper: -

  Official docs

• Transformation operator: debounce and debounceTime

  :video_camera: :dollar: - André Staltz

• Time based operators comparison

• Build your own debounceTime operator

  :video_camera: - Kwinten Pisman

:file_folder: Source Code: https://github.com/ReactiveX/rxjs/blob/master/src/internal/operators/debounceTime.ts