app-injector.service angular code example

Example 1: how to inject service in component angular 6

you can inject service in components constructor:
constructor(public anyService: Service){}

Example 2: injection of generic services in angular

@NgModule({
  imports: [CommonModule],
  declarations: [Component3Component],
  exports: [Component3Component],
  providers: [ApiService, { provide: MY_API_ENDPOINT, useValue: "api.end.point.3" }]
})
export class App2Module { }