angular cli

src/main.ts

@@ -0,0 +1,20 @@
+import 'core-js/es/reflect';
+import 'zone.js/dist/zone';
+import 'reflect-metadata';
+
+import { enableProdMode } from '@angular/core';
+import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
+
+import { AppModule } from './app/app.module';
+import { environment } from './environments/environment';
+
+if (environment.production) {
+  enableProdMode();
+}
+
+document.addEventListener('DOMContentLoaded', () => {
+  document.addEventListener('DOMContentLoaded', () => {
+    platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch((err) => console.error(err));
+  });
+});