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55 lines
1.8 KiB
55 lines
1.8 KiB
import { SchedulerLike, OperatorFunction } from '../types';
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/**
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*
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* Emits an object containing the current value, and the time that has
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* passed between emitting the current value and the previous value, which is
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* calculated by using the provided `scheduler`'s `now()` method to retrieve
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* the current time at each emission, then calculating the difference. The `scheduler`
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* defaults to {@link asyncScheduler}, so by default, the `interval` will be in
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* milliseconds.
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*
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* <span class="informal">Convert an Observable that emits items into one that
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* emits indications of the amount of time elapsed between those emissions.</span>
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*
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* 
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*
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* ## Examples
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* Emit inteval between current value with the last value
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*
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* ```ts
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* const seconds = interval(1000);
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*
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* seconds.pipe(timeInterval())
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* .subscribe(
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* value => console.log(value),
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* err => console.log(err),
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* );
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*
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* seconds.pipe(timeout(900))
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* .subscribe(
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* value => console.log(value),
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* err => console.log(err),
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* );
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*
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* // NOTE: The values will never be this precise,
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* // intervals created with `interval` or `setInterval`
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* // are non-deterministic.
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*
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* // {value: 0, interval: 1000}
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* // {value: 1, interval: 1000}
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* // {value: 2, interval: 1000}
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* ```
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*
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* @param {SchedulerLike} [scheduler] Scheduler used to get the current time.
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* @return {Observable<{ interval: number, value: T }>} Observable that emit infomation about value and interval
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* @method timeInterval
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*/
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export declare function timeInterval<T>(scheduler?: SchedulerLike): OperatorFunction<T, TimeInterval<T>>;
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/**
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* @deprecated exposed API, use as interface only.
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*/
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export declare class TimeInterval<T> {
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value: T;
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interval: number;
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constructor(value: T, interval: number);
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}
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