Angular2 Beta dependency injection

Question

I have a NavBar Component which loads the QApi Service, the QApi Service loads the UserService, but I get the following error:

EXCEPTION: No provider for Use         


        

Answer 1

List the services in your bootstrap call (wherever you are handling that). Something like the following should work:

bootstrap(App, [UserService, QApi, COMMON_DIRECTIVES, ROUTER_DIRECTIVES, ROUTER_PROVIDERS, HTTP_PROVIDERS]); 
providers// directives added here are available to all children

Then you will have a single instance of each of those services available to the rest of your application.