throttle

Emits a value from the source Observable, then ignores subsequent source values for a duration determined by another Observable, then repeats this process.

It's like throttleTime, but the silencing duration is determined by a second Observable.

throttle emits the source Observable values on the output Observable when its internal timer is disabled, and ignores source values when the timer is enabled. Initially, the timer is disabled. As soon as the first source value arrives, it is forwarded to the output Observable, and then the timer is enabled by calling the durationSelector function with the source value, which returns the "duration" Observable. When the duration Observable emits a value, the timer is disabled, and this process repeats for the next source value.

Example

Emit clicks at a rate of at most one click per second

import { fromEvent, throttle, interval } from 'rxjs';

const clicks = fromEvent(document, 'click');
const result = clicks.pipe(throttle(() => interval(1000)));

result.subscribe(x => console.log(x));