date method

FormFieldValidator date ({String errorText: "This field requires a valid date string." })

FormFieldValidator that requires the field's value to be a valid date string.

Implementation

static FormFieldValidator date({
  String errorText = "This field requires a valid date string.",
}) {
  return (val) {
    if (val != null && val.isNotEmpty) {
      if (!isDate(val)) return errorText;
    }
  };
}