How to get last emitted value from observable

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To get the last emitted value from an Observable, you can use the last operator. The last operator filters the values emitted by the source Observable and only emits the last value before the Observable completes.

Here’s an example of how you can use last operator in RxJS to get the last emitted value:

import { Observable } from 'rxjs';

const observable = new Observable((observer) => {
  observer.next(1);
  observer.next(2);
  observer.next(3);
  observer.complete();
});

observable.pipe(
  last()
).subscribe((value) => {
  console.log(value); // Output: 3
});

In this example, we create an Observable using the Observable constructor and emit three values using the next method. After emitting the values, we call the complete method to indicate that the Observable has completed.

We then use the last operator with the pipe method to filter the emitted values and only emit the last value. Finally, we subscribe to the resulting Observable and log the last emitted value to the console.

The output of the above code will be 3, which is the last emitted value from the Observable.

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