What are the best practices for using Angular lifecycle hooks?

What are the best practices for using Angular lifecycle hooks?

When using Angular lifecycle hooks, it's important to keep your code clean and efficient. Some best practices include: 1. Use ngOnInit for initialization logic, 2. Avoid heavy computations in hooks, 3. Unsubscribe from observables in ngOnDestroy, and 4. Use ngOnChanges wisely to respond to input changes.

Can you explain why it's important to unsubscribe from observables?

Unsubscribing from observables is crucial to prevent memory leaks in your application. If you don't unsubscribe, the component may still hold references to the observable, leading to unnecessary resource consumption and potential performance issues.

What happens if I forget to unsubscribe?

If you forget to unsubscribe, the component may continue to receive updates from the observable even after it has been destroyed. This can lead to memory leaks, where the application consumes more memory over time, and can also cause unexpected behavior or errors.

Are there any tools to help manage subscriptions?

Yes, there are tools like the AsyncPipe in Angular that automatically handle subscriptions for you. Additionally, libraries like ngrx provide state management solutions that help manage observables and subscriptions more effectively.