work.suroh.tk/node_modules/rxjs/operator/throttleTime.d.ts

44 lines
2.0 KiB
TypeScript

import { Observable } from '../Observable';
import { IScheduler } from '../Scheduler';
import { ThrottleConfig } from '../operators/throttle';
/**
* Emits a value from the source Observable, then ignores subsequent source
* values for `duration` milliseconds, then repeats this process.
*
* <span class="informal">Lets a value pass, then ignores source values for the
* next `duration` milliseconds.</span>
*
* <img src="./img/throttleTime.png" width="100%">
*
* `throttleTime` 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. After `duration` milliseconds (or the time unit determined
* internally by the optional `scheduler`) has passed, the timer is disabled,
* and this process repeats for the next source value. Optionally takes a
* {@link IScheduler} for managing timers.
*
* @example <caption>Emit clicks at a rate of at most one click per second</caption>
* var clicks = Rx.Observable.fromEvent(document, 'click');
* var result = clicks.throttleTime(1000);
* result.subscribe(x => console.log(x));
*
* @see {@link auditTime}
* @see {@link debounceTime}
* @see {@link delay}
* @see {@link sampleTime}
* @see {@link throttle}
*
* @param {number} duration Time to wait before emitting another value after
* emitting the last value, measured in milliseconds or the time unit determined
* internally by the optional `scheduler`.
* @param {Scheduler} [scheduler=async] The {@link IScheduler} to use for
* managing the timers that handle the throttling.
* @return {Observable<T>} An Observable that performs the throttle operation to
* limit the rate of emissions from the source.
* @method throttleTime
* @owner Observable
*/
export declare function throttleTime<T>(this: Observable<T>, duration: number, scheduler?: IScheduler, config?: ThrottleConfig): Observable<T>;