tryValidate method

@override String? tryValidate()

Validates the form field value

Implementation

@override
String? tryValidate() {
  final parsedExtra = num.tryParse(extra);
  if (parsedExtra == null) return "Max value not a valid number";
  if (value.length < parsedExtra) {
    if (customMessage == null) {
      return buildMessage(ValidatorStrings.min, attribute);
    }
    return customMessage;
  }
  return null;
}