bootstrap.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 {hmrModule, bootloader} from '@angularclass/hmr';

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

bootloader(() => {
  const promise = platformBrowserDynamic().bootstrapModule(AppModule);

  if (environment.hmr) {
    (<any>module).hot.accept();

    promise.then((mod) => {
      return hmrModule(mod, <any>module);
    });
  }
});