Angular2 access global service without including it in every constructor

Question

I have three classes:

@Injectable()
export class ApiService {
  constructor(public http: Http) {}

  get(url: string) {
    return http.get(url);
  }

}

@In         


        

Answer 1

I think that it's not something supported. It's the way dependency injection works in Angular2, i.e. based on decorators. The latters uses the constructor of the associated class to determine what must be injected. You must be aware that the concept of class and extends are natively supported by TypeScript but such code is transpiled into JavaScript.

See this answer for more details about the transpiled code:

• How to inject service to class and then extend component with it?

Hope it helps you, Thierry