import { enableProdMode } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { AppModule } from './app/app.module'; import { environment } from './environments/environment'; import { registerLocaleData } from '@angular/common'; import zh from '@angular/common/locales/zh'; registerLocaleData(zh); if (environment.production) { enableProdMode(); } platformBrowserDynamic().bootstrapModule(AppModule) .catch(err => console.log(err));