import { enableProdMode } from '@angular/core' ; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic' ; import { AppModule } from './app/app.module' ; import { environment } from './environments/environment' ; export function getBaseUrl ( ) { return document . getElementsByTagName ( 'base' ) [ 0 ] . href ; } const providers = [ { provide : 'BASE_URL' , useFactory : getBaseUrl , deps : [ ] } ] ; if ( environment . production ) { enableProdMode ( ) ; } platformBrowserDynamic ( providers ) . bootstrapModule ( AppModule ) . catch ( err => console . log ( err ) ) ;