import { enableProdMode } from '@angular/core' ; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic' ; import { AppModule } from './app/app.module' ; import { environment } from './environments/environment' ; import 'hammerjs' ; if ( environment . production ) { enableProdMode ( ) ; } platformBrowserDynamic ( ) . bootstrapModule ( AppModule ) . then ( ( ) => { if ( 'serviceWorker' in navigator && environment . production ) { navigator . serviceWorker . register ( '/ngsw-worker.js' ) ; } } ) . catch ( err => console . log ( err ) ) ;