exactLength static method

FormFieldValidator<String> exactLength({
  1. required int length,
  2. required String message,
})

Fails unless exactly length characters. UValidators.exactLength(length: 10, message: "Must be 10 digits")

Implementation

static FormFieldValidator<String> exactLength({required int length, required String message}) => (String? value) {
  if (value == null || value.length != length) return message;
  return null;
};