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import { Observable } from '../Observable';
import { OperatorFunction } from '../types';
/**
* Buffers the source Observable values until `closingNotifier` emits.
*
* <span class="informal">Collects values from the past as an array, and emits
* that array only when another Observable emits.</span>
* ![](buffer.png)
* Buffers the incoming Observable values until the given `closingNotifier`
* Observable emits a value, at which point it emits the buffer on the output
* Observable and starts a new buffer internally, awaiting the next time
* `closingNotifier` emits.
* ## Example
* On every click, emit array of most recent interval events
* ```ts
* import { fromEvent, interval } from 'rxjs';
* import { buffer } from 'rxjs/operators';
* const clicks = fromEvent(document, 'click');
* const intervalEvents = interval(1000);
* const buffered = intervalEvents.pipe(buffer(clicks));
* buffered.subscribe(x => console.log(x));
* ```
* @see {@link bufferCount}
* @see {@link bufferTime}
* @see {@link bufferToggle}
* @see {@link bufferWhen}
* @see {@link window}
* @param {Observable<any>} closingNotifier An Observable that signals the
* buffer to be emitted on the output Observable.
* @return A function that returns an Observable of buffers, which are arrays
* of values.
*/
export declare function buffer<T>(closingNotifier: Observable<any>): OperatorFunction<T, T[]>;
//# sourceMappingURL=buffer.d.ts.map