44 lines
1.6 KiB
TypeScript
44 lines
1.6 KiB
TypeScript
import { Observable } from '../Observable';
|
|
import { OperatorFunction } from '../types';
|
|
/**
|
|
* Branch out the source Observable values as a nested Observable whenever
|
|
* `windowBoundaries` emits.
|
|
*
|
|
* <span class="informal">It's like {@link buffer}, but emits a nested Observable
|
|
* instead of an array.</span>
|
|
*
|
|
* 
|
|
*
|
|
* Returns an Observable that emits windows of items it collects from the source
|
|
* Observable. The output Observable emits connected, non-overlapping
|
|
* windows. It emits the current window and opens a new one whenever the
|
|
* Observable `windowBoundaries` emits an item. Because each window is an
|
|
* Observable, the output is a higher-order Observable.
|
|
*
|
|
* ## Example
|
|
* In every window of 1 second each, emit at most 2 click events
|
|
* ```javascript
|
|
* const clicks = fromEvent(document, 'click');
|
|
* const interval = interval(1000);
|
|
* const result = clicks.pipe(
|
|
* window(interval),
|
|
* map(win => win.take(2)), // each window has at most 2 emissions
|
|
* mergeAll(), // flatten the Observable-of-Observables
|
|
* );
|
|
* result.subscribe(x => console.log(x));
|
|
* ```
|
|
* @see {@link windowCount}
|
|
* @see {@link windowTime}
|
|
* @see {@link windowToggle}
|
|
* @see {@link windowWhen}
|
|
* @see {@link buffer}
|
|
*
|
|
* @param {Observable<any>} windowBoundaries An Observable that completes the
|
|
* previous window and starts a new window.
|
|
* @return {Observable<Observable<T>>} An Observable of windows, which are
|
|
* Observables emitting values of the source Observable.
|
|
* @method window
|
|
* @owner Observable
|
|
*/
|
|
export declare function window<T>(windowBoundaries: Observable<any>): OperatorFunction<T, Observable<T>>;
|