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- import { SubscribableOrPromise } from '../Observable';
- import { MonoTypeOperatorFunction } from '../interfaces';
- /**
- * Emits a value from the source Observable only after a particular time span
- * determined by another Observable has passed without another source emission.
- *
- * <span class="informal">It's like {@link debounceTime}, but the time span of
- * emission silence is determined by a second Observable.</span>
- *
- * <img src="./img/debounce.png" width="100%">
- *
- * `debounce` delays values emitted by the source Observable, but drops previous
- * pending delayed emissions if a new value arrives on the source Observable.
- * This operator keeps track of the most recent value from the source
- * Observable, and spawns a duration Observable by calling the
- * `durationSelector` function. The value is emitted only when the duration
- * Observable emits a value or completes, and if no other value was emitted on
- * the source Observable since the duration Observable was spawned. If a new
- * value appears before the duration Observable emits, the previous value will
- * be dropped and will not be emitted on the output Observable.
- *
- * Like {@link debounceTime}, this is a rate-limiting operator, and also a
- * delay-like operator since output emissions do not necessarily occur at the
- * same time as they did on the source Observable.
- *
- * @example <caption>Emit the most recent click after a burst of clicks</caption>
- * var clicks = Rx.Observable.fromEvent(document, 'click');
- * var result = clicks.debounce(() => Rx.Observable.interval(1000));
- * result.subscribe(x => console.log(x));
- *
- * @see {@link audit}
- * @see {@link debounceTime}
- * @see {@link delayWhen}
- * @see {@link throttle}
- *
- * @param {function(value: T): SubscribableOrPromise} durationSelector A function
- * that receives a value from the source Observable, for computing the timeout
- * duration for each source value, returned as an Observable or a Promise.
- * @return {Observable} An Observable that delays the emissions of the source
- * Observable by the specified duration Observable returned by
- * `durationSelector`, and may drop some values if they occur too frequently.
- * @method debounce
- * @owner Observable
- */
- export declare function debounce<T>(durationSelector: (value: T) => SubscribableOrPromise<number>): MonoTypeOperatorFunction<T>;
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