Angular
Understanding Angular Lifecycle Hooks: A Beginner's Guide
Introduction
Beginner students will find value in learning about Angular Lifecycle Hooks through this introduction.
The component lifecycle changes through numerous phases starting with creation and ending with destruction according to Angular terminology. Switching into these hooks provides access to essential moments which helps you administer data while starting properties and disposing resources. These are the eight lifecycle hooks summarized in the following list.
ngOnChanges()
The component gets triggered each time an input property changes its value. The SimpleChanges object shows the past and current data values during the update.
ngOnInit()
The component runs it once when initialization concludes. This hook suits well for retrieving data and setting initial default values.
ngDoCheck()
The triggering happens at every point of change detection cycle. The hook works well for adding custom change detection but you should minimize its use to protect performance.
ngAfterContentInit()
The Angular platform executes a single execution of Fires whenever it places external content into the component. This directive proves practical when you need to start content that depends on ng-content.
ngAfterContentChecked()
The method triggers execution during every projected content inspection phase. The detection of changes made to ng-content becomes possible with this method.
ngAfterViewInit()
This hook executes a single time after the component's view along with child views finish initialization from Angular. Ideal for interacting with child components or DOM elements.
ngAfterViewChecked()
In every check of the component's view and child views this hook will automatically trigger. The hook serves to respond to changes within view hierarchy hierarchies.
ngOnDestroy()
Before the component reaches destruction point this hook gets triggered. Leak-free code can be achieved by clearing up resources through ngOnDestroy to end subscriptions and timers.
Why Should You Care?
The knowledge of hooks enables developers to enhance control over component behavior thus generating code bases that remain simple to handle. Developers who want to excel in Angular development must keep the skills associated with hooks as their core abilities.
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Angular