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43 lines
1.6 KiB
43 lines
1.6 KiB
import { Observable } from '../Observable'; |
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import { MonoTypeOperatorFunction } from '../types'; |
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/** |
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* Emits the values emitted by the source Observable until a `notifier` |
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* Observable emits a value. |
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* |
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* <span class="informal">Lets values pass until a second Observable, |
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* `notifier`, emits a value. Then, it completes.</span> |
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* |
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*  |
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* |
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* `takeUntil` subscribes and begins mirroring the source Observable. It also |
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* monitors a second Observable, `notifier` that you provide. If the `notifier` |
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* emits a value, the output Observable stops mirroring the source Observable |
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* and completes. If the `notifier` doesn't emit any value and completes |
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* then `takeUntil` will pass all values. |
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* |
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* ## Example |
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* Tick every second until the first click happens |
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* ```ts |
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* import { fromEvent, interval } from 'rxjs'; |
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* import { takeUntil } from 'rxjs/operators'; |
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* |
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* const source = interval(1000); |
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* const clicks = fromEvent(document, 'click'); |
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* const result = source.pipe(takeUntil(clicks)); |
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* result.subscribe(x => console.log(x)); |
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* ``` |
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* |
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* @see {@link take} |
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* @see {@link takeLast} |
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* @see {@link takeWhile} |
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* @see {@link skip} |
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* |
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* @param {Observable} notifier The Observable whose first emitted value will |
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* cause the output Observable of `takeUntil` to stop emitting values from the |
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* source Observable. |
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* @return {Observable<T>} An Observable that emits the values from the source |
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* Observable until such time as `notifier` emits its first value. |
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* @method takeUntil |
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* @owner Observable |
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*/ |
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export declare function takeUntil<T>(notifier: Observable<any>): MonoTypeOperatorFunction<T>;
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