update

node_modules/rxjs/operators/buffer.d.ts

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+import { Observable } from '../Observable';
+import { OperatorFunction } from '../interfaces';
+/**
+ * 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>
+ *
+ * <img src="./img/buffer.png" width="100%">
+ *
+ * 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 <caption>On every click, emit array of most recent interval events</caption>
+ * var clicks = Rx.Observable.fromEvent(document, 'click');
+ * var interval = Rx.Observable.interval(1000);
+ * var buffered = interval.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 {Observable<T[]>} An Observable of buffers, which are arrays of
+ * values.
+ * @method buffer
+ * @owner Observable
+ */
+export declare function buffer<T>(closingNotifier: Observable<any>): OperatorFunction<T, T[]>;