Angular: Unterschied zwischen den Versionen

import { AbstractControl, FormBuilder, FormGroup, ValidatorFn, Validators } from '@angular/forms';
class
{
  angForm: FormGroup;

  constructor(private formBuilder: FormBuilder)
  {
    this.angForm = formBuilder.group({
      email: ['', Validators.required],
      special: ['', this.customValidation("DE")]
    })
  }

  customValidation(loc: string) : ValidatorFn
  {
    return (control: AbstractControl) =>
    {
      if (loc == "DE" && control.value == "Deutsch")
        return null;
      else
        return { wrongCountry: true };
    }
  }
}

<input type="text" formControlName="email" [(ngModel)]="useremail"/>
<div *ngIf="angForm.controls['email'].invalid && (angForm.controls['email'].dirty || angForm.controls['email'].touched)">
  <div *ngIf="angForm.controls['email'].errors.required">
    Pflichtfeld!
  </div>
</div>

<input type="text" formControlName="special" [(ngModel)]="custom"/>
<div *ngIf="angForm.controls['special'].invalid && (angForm.controls['special'].dirty || angForm.controls['special'].touched)">
  <div *ngIf="angForm.controls['special'].errors.wrongCountry">
    Falsches Land!
  </div>
</div>