app.component.ts

import { Component, ɵrenderComponent as renderComponent, Injector } from '@angular/core';

@Component({
  selector: 'app-root',
  template: `
    <app-button></app-button>
  `
})
export class AppComponent {
  constructor(injector: Injector) {
    import('./button.component').then(({ ButtonComponent }) => {
      renderComponent(ButtonComponent, { injector });
    });
  }
}