Is it necessary to unsubscribe from observables created by Http methods?

Question

Do you need to unsubscribe from Angular 2 http calls to prevent memory leak?

 fetchFilm(index) {
        var sub = this._http.get(`http://example.com`)
              


        

Answer 1

You shouldn't unsubscribe from observables that completes automatically (e.g Http, calls). But it's necessary to unsubscribe from infinite observables like Observable.timer().