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[RxJS] Use takeUntil instead of manually unsubscribing from Observables
Manually unsubscribing from subscriptions is safe, but tedious and error-prone. This lesson will teach us about the takeUntil operator and its utility to make unsubscribing automatic.
const click$ = Rx.Observable.fromEvent(document, ‘click‘);const sub = click$.subscribe(function(ev) { console.log(ev.clientX);});setTimeout(() => { sub.unsubscribe();}, 2000);
In the code we manully unsubscribe.
We can use tha helper methods such as takeUntil, take() help to automatically handle subscritpiton.
const click$ = Rx.Observable .fromEvent(document, ‘click‘);const four$ = Rx.Observable.interval(4000).take(1);/*click$ --c------c---c-c-----c---c---c-four$ -----------------0|clickUntilFour$ --c------c---c-c-|*/const clickUntilFour$ = click$.takeUntil(four$);clickUntilFour$.subscribe(function (ev) { console.log(ev.clientX);});
[RxJS] Use takeUntil instead of manually unsubscribing from Observables
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