DI simple application with lazy loading

di_simple_application_with_lazy_loading.ts

@Component({
  selector: 'child',
  template: `
    Child
    <router-outlet></router-outlet>
  `
})
export class ChildComponent {}
...
@NgModule({
  imports: [
    BrowserModule,
    RouterModule.forRoot([
      {
        path: 'child', component: ChildComponent,
        children: [
          { 
             path: 'grand-child', 
             loadChildren: './grand-child/grand-child.module#GrandChildModule'}
        ]
      },
      { path: '', redirectTo: '/child', pathMatch: 'full' }
    ])
  ],
  declarations: [
    AppComponent,
    ChildComponent
  ],
  bootstrap: [AppComponent]
})
export class AppModule {}