creditCard method

FormFieldValidator creditCard ({String errorText: "This field requires a valid credit card number." })

FormFieldValidator that requires the field's value to be a valid credit card number.

Implementation

static FormFieldValidator creditCard({
  String errorText = "This field requires a valid credit card number.",
}) {
  return (val) {
    if (val != null && val.isNotEmpty) {
      if (!isCreditCard(val)) return errorText;
    }
  };
}