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

The takeUntil operator is used to unsubscribe automatically from an Observable when another Observable emits a value or completes. Its usage in the RxJS library is as follows:

index.tsx
import { fromEvent, interval } from 'rxjs';
import { takeUntil } from 'rxjs/operators';

const source = interval(1000);
const clicks = fromEvent(document, 'click');
const result = source.pipe(takeUntil(clicks));
result.subscribe(x => console.log(x));
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In the above example, interval() produces an Observable that emits every 1 second. FromEvent() produces an Observable that captures all click events on the document object. The takeUntil() operator takes the source Observable (interval(1000)) and completes it when an event is emitted from the clicks Observable.

This example shows how takeUntil() can be used to unsubscribe from an Observable automatically after a certain condition is met.