dobValidation static method

String? dobValidation(
  1. String date
)

Implementation

static String? dobValidation(String date) {
  if (date.isEmpty ||
      date.length != 10 ||
      !isValidDate("MM-dd-yyyy", date) ||
      !isPastDate(date, 'MM-dd-yyyy')) {
    return "Enter valid date";
  }
  return null;
}