alertInputNumberValidation static method
Implementation
static String? alertInputNumberValidation({@required String? number}) {
final RegExp regExp = RegExp(validNumberPattern.toString());
if (number!.isEmpty) {
return ValidatorStringConstants.empty_value_message;
}
if (!regExp.hasMatch(number)) {
return ValidatorStringConstants.invalid_value_msg;
}
return null;
}