Explain angular life cycle in details

Answer

In Angular, components go through a series of lifecycle events as they are created, updated, and destroyed. These lifecycle events provide hooks that allow you to perform specific actions at different stages of a component's life. Here is an overview of the Angular component lifecycle:

1. ngOnChanges: This hook is called when the component receives input properties from its parent component or when the value of an input property changes. It is called before ngOnInit and every time an input property changes.

2. ngOnInit: This hook is called once, after the component's inputs are initialized and before the component is rendered. It is commonly used to perform initialization tasks, such as retrieving data from a service or setting up subscriptions.

3. ngDoCheck: This hook is called during every change detection cycle. It is used to detect and respond to changes that Angular cannot detect automatically. It is often used for custom change detection logic or fine-grained performance optimizations.

4. ngAfterContentInit: This hook is called after Angular projects external content (content projected through ng-content) into the component's view. It is used to perform initialization tasks that rely on projected content.

5. ngAfterContentChecked: This hook is called after Angular checks the content projected into the component's view. It is used for additional processing after the content has been checked.

6. ngAfterViewInit: This hook is called after Angular initializes the component's view and child views. It is commonly used to perform initialization tasks that rely on the component's view, such as accessing DOM elements or initializing third-party libraries.

7. ngAfterViewChecked: This hook is called after Angular checks the component's view and child views. It is used for additional processing after the view has been checked.

8. ngOnDestroy: This hook is called just before the component is destroyed and removed from the DOM. It is used to perform cleanup tasks, such as unsubscribing from subscriptions or releasing resources.

These lifecycle hooks provide developers with the ability to execute code at specific points in a component's life, allowing for fine-grained control and customization. By utilizing these hooks effectively, you can manage component initialization, data updates, and resource management in an Angular application