How to unsubscribe/stop Observable?

Question

I use the following code for timer:

export class TimerService {
  private ticks: number = 0;
  private seconds: number = 0;
  private timer;

  constructor(s         


        

Answer 1

The subscribe method returns a Subscription object, which you can later use to stop listening the stream contained by the observable to which you subscribed.

import { ISubscription } from 'rxjs/Subscription':
import { TimerObservable } from 'rxjs/observable/TimerObservable';

export class TimerService {
  private ticks = 0;
  private timer$: TimerObservable;
  private $timer : ISubscription;

  constructor(private seconds = 0) {
    this.timer$ = TimerObservable.create(2000, 1000);//or you can use the constructor method
    this.$timer = this.timer.subscribe(t => {
      this.ticks = t;
      this.disactivate();
    });
  }

  private disactivate() {
    if (this.ticks >= this.seconds) {
      this.$timer.unsubscribe();
    }
  }
}

Its important to notice that unsubscribe exist in rxjs (version 5 and up), before that, in rx (version lower than 5, a different package) the method was called dispose

Answer 2

So after some PUNISHING research I've added my own npm library for this problem.

Improves previous answer by NOT having to add any extra convolution variables and ease of use.

• StackBlitz
• Repo
• NPM

Answer 3

The best way is to unsubscribe when instance is destroyed.

ngOnDestroy() {
 this.sub.unsubscribe();
}