@Component({  selector: "component",  providers: [Service]})

@Injectable({ providedIn: HelloComponent })export class Service {}

@Component({  selector: "component",  providers: [{ provide: Service, useClass: Service }]})

<ng-template [ngIf]=true><div>True</div></ng-template>

const routes: Routes = [];{path: ''redirectTo: 'home', pathMatch: 'full'},{path: 'find', redirectTo: 'search'},{path: 'home', component: HomeComponent},{path: movie/:movieId',component: MovieComponent,children: [{path: '', redirectTo: 'tracks'}, (1){path: 'tracks', component: MovieListComponent}, (2){path: 'albums', component: MovieAlbumListComponent}, (3)]},{ path: '**' , component: HomeComponent}

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