Question

What is the main purpose of the ngOnDestroy method in Angular?

a) To create new objects
b) To initialize the component
c) To unsubscribe observables and detach event handlers
d) To render the component

Answer 1

The ngOnDestroy method in Angular is used for cleaning up a component, such as unsubscribing from observables and detaching event handlers, to prevent memory leaks and maintain application performance.

Step-by-step explanation:

The main purpose of the ngOnDestroy method in Angular is to provide a cleanup logic for the component. This cleanup often involves tasks such as unsubscribing observables to prevent memory leaks, detaching event handlers, and performing other teardown operations that are necessary when the component is destroyed or no longer needed in the application. This lifecycle hook is crucial for maintaining optimal performance and avoiding issues related to resource management.