Angular component lifecycle hooks | Lifecycle hooks 🔥🔥 | Angular tutorial beginner to advanced 🔥
Angular Tutorial - Component lifecycle hooks - Interview Academy
In this video we will discuss Angular component lifecycle hooks.
A component has a lifecycle managed by Angular. Angular
1. Creates the component
2. Renders the component
3. Creates and renders the component children
4. Checks when the component data-bound properties change, and
5. Destroys the component before removing it from the DOM
To tap into and react when these life cycle events occur, angular offers several lifecycle hooks
The 3 most commonly used hooks are
ngOnChanges - Executes, every time the value of an input property changes. The hook method receives a SimpleChanges object containing current and previous property values. This is called before ngOnInit.
ngOnInit - Executes after the constructor and after ngOnChange hook for the first time. It is most commonly used for component initialisation and retrieving data from a database.
ngOnDestroy - Executes just before angular destroys the component and generally used for performing cleanup.
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