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 best way is to unsubscribe when instance is destroyed.

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