Saving subscription to unsubscribe?

I have a question about subscription. Do i have to save subscription and unsubscribe later? For example when i subscribing in page constructor to subject from my provider?

I use the async pipe for that. Makes debugging easier, because Angular unsubscribes automatically. It takes some practice, but it’s worth it imo.

One thing I’m doing for Observables that don’t wind up directly in the template is introduce a subject:
private lifetime = new Subject<void>();

And use takeWhile on those Observables:

.subscribe(value => this.tubularVariable => value * 9001);

Then in ionViewWillLeave do:

  ionViewWillLeave() {;

Although, having just read the documentation both of those lines may be unnecessary, and you might be able to just use this.lifetime.complete.

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