51 lines
2 KiB
TypeScript
51 lines
2 KiB
TypeScript
import { Observable } from '../Observable';
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import { OperatorFunction } from '../types';
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/**
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* Branch out the source Observable values as a nested Observable starting from
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* an emission from `openings` and ending when the output of `closingSelector`
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* emits.
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*
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* <span class="informal">It's like {@link bufferToggle}, but emits a nested
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* Observable instead of an array.</span>
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*
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* 
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*
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* Returns an Observable that emits windows of items it collects from the source
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* Observable. The output Observable emits windows that contain those items
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* emitted by the source Observable between the time when the `openings`
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* Observable emits an item and when the Observable returned by
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* `closingSelector` emits an item.
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*
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* ## Example
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* Every other second, emit the click events from the next 500ms
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* ```ts
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* import { fromEvent, interval, EMPTY } from 'rxjs';
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* import { windowToggle, mergeAll } from 'rxjs/operators';
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*
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* const clicks = fromEvent(document, 'click');
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* const openings = interval(1000);
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* const result = clicks.pipe(
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* windowToggle(openings, i => i % 2 ? interval(500) : EMPTY),
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* mergeAll()
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* );
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* result.subscribe(x => console.log(x));
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* ```
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*
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* @see {@link window}
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* @see {@link windowCount}
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* @see {@link windowTime}
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* @see {@link windowWhen}
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* @see {@link bufferToggle}
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*
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* @param {Observable<O>} openings An observable of notifications to start new
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* windows.
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* @param {function(value: O): Observable} closingSelector A function that takes
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* the value emitted by the `openings` observable and returns an Observable,
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* which, when it emits (either `next` or `complete`), signals that the
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* associated window should complete.
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* @return {Observable<Observable<T>>} An observable of windows, which in turn
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* are Observables.
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* @method windowToggle
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* @owner Observable
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*/
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export declare function windowToggle<T, O>(openings: Observable<O>, closingSelector: (openValue: O) => Observable<any>): OperatorFunction<T, Observable<T>>;
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