[Solved] Angular2: Difference between Decorators

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what is difference between @Input, @output and @ViewChild. we can
access child data using @output so makes @viewchild different from
@Output

http://learnangular2.com/inputs/
http://learnangular2.com/outputs/
http://learnangular2.com/viewChild/

what is @viewContent? any example
I haven’t heard of @viewContent

Is their any way to access parent content from child like we use
@ViewChild to access child content

You could use a service or pass the data down using the @Input More here:
https://angular.io/docs/ts/latest/cookbook/component-communication.html

ngOnChanges, ngOnInit, ngDoCheck & ngOnDestroy

Please read the Angular tutorial:
https://angular.io/docs/ts/latest/guide/lifecycle-hooks.html

I am confused with the term Initializes the component/directive.

I’m not sure what you mean with that, but here is a post for clarification:

@Directive v/s @Component in angular2

ngAfterContentInit, ngAfterContentChecked, ngAfterViewInit &
ngAfterViewChecked?

Please read the Angular tutorial:
https://angular.io/docs/ts/latest/guide/lifecycle-hooks.html

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solved Angular2: Difference between Decorators