gun/examples/angular/src/main.ts

import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

import { AppModule } from './app/app.module';
import { environment } from './environments/environment';

import 'rxjs/add/operator/startWith';
import 'rxjs/add/operator/map';

import 'rxjs/add/observable/fromEventPattern';

if (environment.production) {
  enableProdMode();
}

platformBrowserDynamic().bootstrapModule(AppModule);