A marker metadata that marks a class as available to Injector for creation.
@Injectable() class Car {}
For more details, see the Dependency Injection Guide.
@Injectable()
class UsefulService {
}
@Injectable()
class NeedsService {
constructor(public service: UsefulService) {}
}
const injector = ReflectiveInjector.resolveAndCreate([NeedsService, UsefulService]);
expect(injector.get(NeedsService).service instanceof UsefulService).toBe(true);
Injector will throw NoAnnotationError when trying to instantiate a class that does not have @Injectable marker, as shown in the example below.
class UsefulService {}
class NeedsService {
constructor(public service: UsefulService) {}
}
expect(() => ReflectiveInjector.resolveAndCreate([NeedsService, UsefulService])).toThrow();
exported from @angular/core/index defined in @angular/core/src/di/metadata.ts
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Licensed under the Creative Commons Attribution License 4.0.
https://v2.angular.io/docs/ts/latest/api/core/index/Injectable-decorator.html