ng-gregorian-hijri-datepicker/src/lib/hijri-gregorian-datepicker/provide-parent-form.directive.ts

* Lightweight **Angular** datepicker based on [ng-bootstrap](https://ng-bootstrap.github.io/#/components/datepicker/overview) that supports **Gregorian** and **Hijri** calendars. * Provides ability to swap between **Gregorian** and **Hijri** calendars *

import { Directive, Optional, SkipSelf } from '@angular/core';
import { ControlContainer, NgForm } from '@angular/forms';

export function test(form: NgForm) {
  return form;
}

@Directive({
  selector: '[provideParentForm]',
  providers: [
    {
      provide: ControlContainer,
      useFactory:  test ,
      deps: [[new Optional(), new SkipSelf(), NgForm]]
    }
]
})
export class ProvideParentFormDirective {

  constructor() { }

}