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Component Lifecycle

A component has a lifecycle managed by Angular itself. Angular manages creation, rendering, data-bound properties etc. It also offers hooks that allow us to respond to key lifecycle events.
Here is the complete lifecycle hook interface inventory:
  • ngOnChanges - called when an input binding value changes
  • ngOnInit - after the first ngOnChanges
  • ngDoCheck - after every run of change detection
  • ngAfterContentInit - after component content initialized
  • ngAfterContentChecked - after every check of component content
  • ngAfterViewInit - after component's view(s) are initialized
  • ngAfterViewChecked - after every check of a component's view(s)
  • ngOnDestroy - just before the component is destroyed