alphanumeric static method

FormFieldValidator<String> alphanumeric({
  1. String? requiredMessage,
  2. String? invalidMessage,
  3. bool isRequired = true,
})

Implementation

static FormFieldValidator<String> alphanumeric({
  String? requiredMessage,
  String? invalidMessage,
  bool isRequired = true,
}) => (String? value) {
  if (isRequired && (value == null || value.isEmpty)) {
    return requiredMessage ?? U.s.required;
  }
  if (value != null && value.isNotEmpty && !value.isAlphanumeric) {
    return invalidMessage ?? U.s.thisFieldIsInvalid;
  }
  return null;
};