End Observable interval when route changes in Angular

Question

I start a interval in an Angular component, but it keeps making requests even after I change the route. How can I stop the interval?

//returns an observable
         


        

Answer 1

You should save subscription to observable:

this.subscription = getAllPolls().subscribe(...);

And implement OnDestroy interface:

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