RxJs: Create observable from field value changing

Question

I'd like to create an Observable using as source a variables: this.pending.

I want to create an Observable which generates a feed every time this.pending value changes.

I mean, when I do:

this.pending = false;

in some place of my code, I want to receive a false feed on my subscription, and so on...

Any ideas?

http://stackoverflow.com/a/35219772/4826457 – Suraj Rao Apr 25 '17 at 12:15 — Suraj Rao, Apr 25 '17 at 12:15

score 2 · Answer 1 · answered Apr 26 '17 at 14:48

Just use BehaviorSubject.

this.pending = new BehaviorSubject<boolean>(false)

and somewhere

subscription = this.pending.subscribe(console.log)

Then every time you execute

this.pending.next(true) or this.pending.next(false)

subscription gets new value from this.pending.

1 Answers1