timeout

signature: timeout(due: number, scheduler: Scheduler): Observable

Error if no value is emitted before specified duration

Ultimate RxJS

Examples

Example 1: Timeout after 2.5 seconds

( StackBlitz | jsBin | jsFiddle )

// RxJS v6+
import { of } from 'rxjs';
import { concatMap, timeout, catchError, delay } from 'rxjs/operators';
// simulate request
function makeRequest(timeToDelay) {
return of('Request Complete!').pipe(delay(timeToDelay));
}
of(4000, 3000, 2000)
.pipe(
concatMap(duration =>
makeRequest(duration).pipe(
timeout(2500),
catchError(error => of(`Request timed out after: ${duration}`))
)
)
)
/*
* "Request timed out after: 4000"
* "Request timed out after: 3000"
* "Request Complete!"
*/
.subscribe(val => console.log(val));

Additional Resources

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