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Bookmark or Share- Understanding dependency injection • AngularConsider a class called HeroService that needs to act as a dependency in a component. The first step is to add the @Injectable decorator to show that the class can be injected. The next step is to make it available in the DI by providing it. A dependency can be provided in multiple places: Preferred: At the application root level using providedIn.
- Creating an injectable service • AngularA component can delegate certain tasks to services, such as fetching data from the server, validating user input, or logging directly to the console. By defining such processing tasks in an injectable service class, you make those tasks available to any component.
- angular - What does @Injectable mean? - Stack OverflowInjectable() in the service specifies that this service can be injected/used in other components. In short if service has injectable decorator, other components can use that service by creating reference of service class in the constructor.
- Angular - Understanding dependency injectionImagine there is a class called HeroService that needs to act as a dependency in a component. The first step is to add the @Injectable decorator to show that the class can be injected. The next step is to make it available in the DI by providing it. A dependency can be provided in multiple places:
- Injectable - AngularMarking a class with @Injectable ensures that the compiler will generate the necessary metadata to create the class's dependencies when the class is injected. The following example shows how a service class is properly marked so that a supporting service can be injected upon creation.
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