angular__angular/integration/cli-elements-universal/src/main.ts

import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';

import {AppModule} from './app/app.module';

document.addEventListener('DOMContentLoaded', () => {
  platformBrowserDynamic()
    .bootstrapModule(AppModule)
    .catch((err) => console.error(err));
});