Angular · Middle · Question 72 of 75

Why avoid `subscribe` inside a component just to copy values into fields?

ngOnInit() {
  this.service.users$.subscribe((u) => (this.users = u));
}

✓Correct answer: It needs manual unsubscribing and may not update OnPush views; async pipe or toSignal handle both
2subscribe is deprecated
3It sends the request twice

Explanation

Declarative bindings tie the subscription to the view's lifetime and notify change detection automatically.

Further reading

Test yourself

Take the Angular · Middle quiz: questions and options are shuffled, and you get a review of your mistakes at the end.