Angular TutorialLesson 27Free preview

Angular Lifecycle Hooks

This lesson is part of Angular · All levels

Summary

Each component has a life cycle from being made, rendered, to being destroyed. Hooks like ngOnInit are used to initialize data after the constructor, while ngOnDestroy is used to clean subscriptions. Understanding the life cycle helps you avoid memory leaks and misplaced logic.

Key points

The constructor is called when the instance class is created
NgInit is executed once the initial input is set
NgOnDestroy is called when the component is removed
NgOnChanges monitors changes in the @Input type of input

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