app.module.ts

// The original AngularJs application
const ngModule = angular.module('admin', [
  // We are leaving all the old module untouched
  'ng1.modules',
  // We can downgrade Components, Directives, Services, etc.
  // And use them in the AngularJs app
  'ng2.modules'
]);

@NgModule({
  imports: [ BrowserModule, UpgradeModule ]
})
class AppModule {

  constructor(
    private upgrade: UpgradeModule,
    private injector: Injector
  ) { }

  ngDoBootstrap() {
    // Bootstrap main app
    this.upgrade.bootstrap(document.body, ['admin']);
  }
}

platformBrowserDynamic().bootstrapModule(AppModule);