validate method

  1. @override
String? validate(
  1. F form,
  2. E key,
  3. String value
)
override

Implementation

@override
String? validate(F form, E key, String value) {
  final digits = value.replaceAll(RegExp(r'\D'), '');

  if (digits.length > max) {
    return loc.maxLengthError(max);
  }

  return null;
}