Angular 7 and 8: Optimized providers (providedIn: root)

How can I go about creating or injecting a tree-shakable service? I've scoured the documentation but can't seem to find any information on it. Do you think I'm doing it correctly?

@Injectable({
       providedIn: 'root',
})
export class ExampleService {
}


import { ExampleService } from './example.service';    
@Component({
  selector: 'app-test',
  template: ``,
  providers: { provide: AuthService, useClass: AuthService}
})
export class MyComponent {

}

When it comes to performance, using providedIn is more efficient.

@Injectable({
       providedIn: 'root',
})

Or without providedIn

@Injectable

Thanks, Andrea

Answer №1

Indeed, utilizing this method will result in the service being loaded solely for the specific module where it is initialized. In your scenario, ExampleService will only be loaded for the module containing MyComponent. For further information, you can visit this useful link.

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