timeoutwith.md

timeoutWith

signature: timeoutWith(due: number | Date, withObservable: ObservableInput, scheduler: SchedulerLike = async): OperatorFunction

Subscribe to second Observable if no emission occurs in given time span.

Examples

Example 1: Timeout after 1 second

( StackBlitz )

// RxJS v6+
import { of } from 'rxjs';
import { timeoutWith, delay, concatMap } from 'rxjs/operators';

const fakeRequest = delayTime => of('!response!').pipe(delay(delayTime));
const requestTimeoutLogger = of('logging request timeout');
const timeoutThreshold = 1000;

of(timeoutThreshold + 1, timeoutThreshold - 1, timeoutThreshold + 3)
  .pipe(
    concatMap(e =>
      fakeRequest(e).pipe(timeoutWith(timeoutThreshold, requestTimeoutLogger))
    )
  )
  .subscribe(console.log);

/*
  OUTPUT:
    logging request timeout
    !response!
    logging request timeout
*/

Additional Resources

• timeoutWith 📰 - Official Docs

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📁 Source Code: https://github.com/ReactiveX/rxjs/blob/master/src/internal/operators/timeoutWith.ts