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Angular 17 Component Lifecycle Hooks | Angular Lifecycle Hooks: A Complete Guide

What is the life cycle of an Angular 17 component?

A component's lifecycle is the sequence of steps that happen between the component's creation and its destruction. Each step represents a different part of Angular's process for rendering components and checking them for updates over time.

4 Phases are:

Phase 1 -

Creation:

Constructor: - Standard JavaScript class constructor. Runs when Angular instantiates the component.

 

Phase 2 -

Change Detection: ngOnInit: - Runs once after Angular has initialized all the component's inputs.


Phase 3 -

Rendering: -

ngOnChanges:- Runs every time the component's inputs have changed.

ngDoCheck:- Runs every time this component is checked for changes.

ngAfterViewInit:- Runs once after the component's view has been initialized.

ngAfterContentInit:- Runs once after the component's content has been initialized.

ngAfterViewChecked:- Runs every time the component's view has been checked for changes.

ngAfterContentChecked:- Runs every time this component content has been checked for changes.

afterNextRender:- Runs once the next time that **all* components have been rendered to the DOM.

afterRender:- Runs every time all components have been rendered to the DOM.

 

Phase 4 -

Destruction:

ngOnDestroy:- Runs once before the component is destroyed.

This is the YouTube video link for this: - https://youtu.be/AFWsRWnbC-Q



By Anil Singh | Rating of this article (*****)

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