fuse-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 { hmrBootstrap } from 'hmr';

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

const bootstrap = () => platformBrowserDynamic().bootstrapModule(AppModule);

if ( environment.hmr )
{
    if ( module['hot'] )
    {
        hmrBootstrap(module, bootstrap);
    }
    else
    {
        console.error('HMR is not enabled for webpack-dev-server!');
        console.log('Are you using the --hmr flag for ng serve?');
    }
}
else
{
    bootstrap().catch(err => console.log(err));
}