Web / RxJs Interview questions
What is "tap" operator in RxJS?
The "tap" operator is used to perform side-effects for notifications from the source observable. Used when you want to affect outside the state with a notification without altering the notification.
import { of } from 'rxjs'; import { tap } from 'rxjs/operators'; const source = of(1, 2, 3, 4, 5) source.pipe( tap(n => { if (n > 3) { throw new TypeError(`Value ${n} is greater than 3`) } }) ) .subscribe(console.log);
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