app.module.ts

// MUST BE IN THIS ORDER!
import 'core-js/es7/reflect';
import 'zone.js/dist/zone';

import { enableProdMode, NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { UpgradeModule } from '@angular/upgrade/static';
import * as angular from 'angular';

// AngularJs app
angular.module('admin', [
  'ng2.modules'
]);

if (!ON_DEVELOPMENT) {
  enableProdMode();
}

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

  constructor(
    private upgrade: UpgradeModule
  ) { }

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

if (ON_DEVELOPMENT) {
  platformBrowserDynamic().bootstrapModule(AppModule);
}