Types of Angular Decorators | @Component | @NgModule | @Input | @output | injectable | Part-6
Decorators are the features of Typescript and are implemented as functions
There are many built-in decorators are available in angular. Some of them are as follows:
@NgModule to define a module.
@Component to define components.
@Injectable to define services.
@Input and @Output to define properties, etc.
Class Decorators: @Component and @NgModule
Property Decorators: @Input and @Output (These two decorators are used inside a class)
Method Decorators: @HostListener (This decorator is used for methods inside a class like a click, mouse hover, etc.)
Parameter Decorators: @Inject (This decorator is used inside class constructor).
Components are the most basic UI building block of an Angular app. An Angular app contains a tree of Angular components. Angular components are a subset of directives, always associated with a template. Unlike other directives, only one component can be instantiated for a given element in a template.