| import { MonoTypeOperatorFunction, SchedulerLike } from '../types'; |
| /** |
| * Emits the most recently emitted value from the source Observable within |
| * periodic time intervals. |
| * |
| * <span class="informal">Samples the source Observable at periodic time |
| * intervals, emitting what it samples.</span> |
| * |
| *  |
| * |
| * `sampleTime` periodically looks at the source Observable and emits whichever |
| * value it has most recently emitted since the previous sampling, unless the |
| * source has not emitted anything since the previous sampling. The sampling |
| * happens periodically in time every `period` milliseconds (or the time unit |
| * defined by the optional `scheduler` argument). The sampling starts as soon as |
| * the output Observable is subscribed. |
| * |
| * ## Example |
| * Every second, emit the most recent click at most once |
| * ```ts |
| * import { fromEvent } from 'rxjs'; |
| * import { sampleTime } from 'rxjs/operators'; |
| * |
| * const clicks = fromEvent(document, 'click'); |
| * const result = clicks.pipe(sampleTime(1000)); |
| * result.subscribe(x => console.log(x)); |
| * ``` |
| * |
| * @see {@link auditTime} |
| * @see {@link debounceTime} |
| * @see {@link delay} |
| * @see {@link sample} |
| * @see {@link throttleTime} |
| * |
| * @param {number} period The sampling period expressed in milliseconds or the |
| * time unit determined internally by the optional `scheduler`. |
| * @param {SchedulerLike} [scheduler=async] The {@link SchedulerLike} to use for |
| * managing the timers that handle the sampling. |
| * @return {Observable<T>} An Observable that emits the results of sampling the |
| * values emitted by the source Observable at the specified time interval. |
| * @method sampleTime |
| * @owner Observable |
| */ |
| export declare function sampleTime<T>(period: number, scheduler?: SchedulerLike): MonoTypeOperatorFunction<T>; |
