ionic-framework/angular/src/providers/popover-controller.ts

import { ComponentFactoryResolver, Injector, Injectable, Optional } from '@angular/core';
import { PopoverOptions, popoverController } from '@ionic/core';

import { EnvironmentInjector } from '../di/r3_injector';
import { OverlayBaseController } from '../util/overlay';

import { AngularDelegate } from './angular-delegate';

@Injectable()
export class PopoverController extends OverlayBaseController<PopoverOptions, HTMLIonPopoverElement> {
  constructor(
    private angularDelegate: AngularDelegate,
    private resolver: ComponentFactoryResolver,
    private injector: Injector,
    // TODO: FW-1641: Migrate to Angular's version once Angular 13 is dropped
    @Optional() private environmentInjector: EnvironmentInjector
  ) {
    super(popoverController);
  }

  create(opts: PopoverOptions): Promise<HTMLIonPopoverElement> {
    return super.create({
      ...opts,
      delegate: this.angularDelegate.create(this.resolver ?? this.environmentInjector, this.injector),
    });
  }
}