how to use the timeoutwith function from the rxjs library in javascript

The timeoutWith operator is used to set a specific time period for an observable stream to run for. If the stream is not completed within the specified time, then a fallback observable is delivered instead.

Here is an example of how to use the timeoutWith operator in javascript:

index.tsx
import { of } from 'rxjs';
import { timeoutWith } from 'rxjs/operators';

const myObservable = of('Some value').pipe(timeoutWith(5000, of('Fallback value')));

myObservable.subscribe(
  value => console.log(`Received value: ${value}`),
  error => console.error(error),
  () => console.log('Observable completed')
);
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In this example, we first import the of function from the rxjs library to create an observable that emits a single value. We also import the timeoutWith operator from the rxjs/operators library.

We then create our observable by calling the pipe method on the of observable and passing in the timeoutWith operator with the desired timeout value and fallback observable.

Finally, we subscribe to our observable and log out any received values, errors, or completion messages.

If the observable emits a value within 5 seconds, then that value will be logged out normally. However, if the observable takes longer than 5 seconds to emit a value, then the fallback value of 'Fallback value' will be logged out instead.