Angular · Middle · Question 61 of 75

How do you register cleanup code from a service or a function without `ngOnDestroy`?

const destroyRef = inject(DestroyRef);
destroyRef.onDestroy(() => socket.close());

✓Correct answer: Inject DestroyRef and call onDestroy
2Use window.onunload
3Services are never destroyed

Explanation

DestroyRef belongs to the current injector: a component, a route's environment, or the app. takeUntilDestroyed is built on it.

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