Ausgeben strukturierter ValidationErrors in benutzerdefinierten Formular-Validatoren

import { AbstractControl, ValidationErrors, ValidatorFn } from '@angular/forms';
 
export function passwordComplexityValidator(minSpecialChars: number): ValidatorFn {
  return (control: AbstractControl<string>): ValidationErrors | null => {
    const value = control.value || '';
    const specialCount = (value.match(/[^A-Za-z0-9]/g) || []).length;
 
    if (specialCount < minSpecialChars) {
      return {
        insufficientSpecialChars: {
          required: minSpecialChars,
          actual: specialCount
        }
      };
    }
    return null;
  };
}