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- Why do we use @Injectable () decorator , when we can actually inject . . .
Yes, you are right about that we can create a service without Injectable () decorator Then why we need this? Injectable decorator or any other angular custom decorator generates metadata A special kind of metadata (design:paramtypes) is required to inject a service Without dependencies and without Injectable:
- angular - What does @Injectable mean? - Stack Overflow
Injectable () 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
- When do we need to use @Injectable on our services in Angular2?
The first paragraph sounds like the previous @Injectable documentation, while the second paragraph got it right Just keep in mind that it is just recommended that we always add the @Injectable decorator on all our services as we may later decide that we need to add dependency parameters, but forget the add the @Injectable when we do so
- What is the difference between @Inject and @Injectable in Angular 2 . . .
What is the difference between @Inject and @Injectable in Angular 2 typescript Asked 9 years, 2 months ago Modified 6 years, 11 months ago Viewed 28k times
- angular - Component as Injectable? - Stack Overflow
A component is injectable by default @Component() (or @Directive()) includes @Injectable() Don't expect to get a specific instance of a component injected This works for example with constructor(@Host() private parentComponent) where DI lookup is limited to parent injectors up to the injector of the host element Normally for your use case DynamicComponentLoader is used which only accepts
- Injectable on service is mandatory in angular 12 - Stack Overflow
The difference between Inject and Injectable: Inject The Inject decorator allows you to define what provider do you want to be used for the injection In the example bellow (taken from Angular Dependency Injection page), the BROWSER_STORAGE is used as the provider for the Storage service
- The semantics of @Injectable (providedIn: root)? - Stack Overflow
When you write @Injectable(providedIn: 'root') this means that the service in singleton for whole application and you can inject in anywhere in the application When you want to make service singleton only for an exact module, you need to assign your module as the parameter to the providedIn - @Injectable(providedIn: MyModule) The only other action required in order to use the @Injectable
- typescript - What is the purpose of providedIn with the Injectable . . .
Injectable is provided - an instance of the Injectable will be given to classes below this specific injector level, whenever they request it Injectable is injected - a class constructor has requested to be given some instance of the service, so Angular will try to give it the nearest instance that can be found in the injector hierarchy "
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