import { enableProdMode } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { AppModule } from './app/app.module'; import { environment } from './environments/environment'; document.getElementById('bootstrapCssUrl').setAttribute('href', `${environment.cdnBaseUrl}Bootstrap/bootstrap.css`); if (environment.production) { enableProdMode(); } platformBrowserDynamic().bootstrapModule(AppModule) .catch(err => console.error(err));