39 lines
1.1 KiB
TypeScript
39 lines
1.1 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {Observable} from 'rxjs';
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// Replaces use of RxJS delay. See v0.5.4.
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/** adds specified delay (in ms) to both next and error channels of the response observable */
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export function delayResponse<T>(response$: Observable<T>, delayMs: number): Observable<T> {
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return new Observable<T>(observer => {
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let completePending = false;
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let nextPending = false;
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const subscription = response$.subscribe(
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value => {
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nextPending = true;
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setTimeout(() => {
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observer.next(value);
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if (completePending) {
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observer.complete();
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}
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}, delayMs);
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},
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error => setTimeout(() => observer.error(error), delayMs),
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() => {
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completePending = true;
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if (!nextPending) {
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observer.complete();
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}
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});
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return () => {
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return subscription.unsubscribe();
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};
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});
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}
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