app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule, Injector } from '@angular/core';
import { createCustomElement } from '@angular/elements';
 
import { HelloComponent } from './hello.component';
 
@NgModule({
  declarations: [AppComponent],
  imports: [BrowserModule],
  providers: [],
  entryComponents: [HelloComponent]
})
export class AppModule {
  constructor(injector: Injector) {
    const el = createCustomElement(HelloComponent, { injector });
    customElements.define('nrwl-hello', el);
  }
 
  ngDoBootstrap() {}
}