Angular Error : StaticInjectorError (Platform: core)[e -> t]:

Question

As I am build the APK with --prod I am getting the error below

    ERROR Error: StaticInjectorError[e -> t]: 
  StaticInjectorError(Platform:         


        

Answer 1

This happens because you did not add the services used to build the module

example:

1. component

@Component({
  selector: 'app-sample',
  templateUrl: './sample.component.html',
  styleUrls: ['./sample.component.scss']
})
export class SampleComponent implements OnInit {

constructor(private localServiceName: YourService) {
}

  ngOnInit() {
  }

}

2. module

@NgModule({
    declarations: [SampleComponent]
})

change to

@NgModule({
    declarations: [SampleComponent]
    providers: [ YourService ]
})