Function maxLengthValidator

packages/forms/src/validators.ts:555–563

(maxLength: number)

 * For example, the object {id: 1, length: 0, width: 0} should be validated.
 */
export function maxLengthValidator(maxLength: number): ValidatorFn {
  return (control: AbstractControl): ValidationErrors | null => {
    const length = control.value?.length ?? lengthOrSize(control.value);
    if (length !== null && length > maxLength) {
      return {'maxlength': {'requiredLength': maxLength, 'actualLength': length}};
    }
    return null;
  };
}

/**
 * Validator that requires the control's value to match a regex pattern.