validate method

  1. @override
String? validate(
  1. String mobileNumber
)
override

A function that returns an error message string to display if the input s not pass a validation test and returns null otherwise.

Implementation

@override
String? validate(String mobileNumber) {
  bool r = HoverValidationRegExp.phoneRegExp.hasMatch(mobileNumber);
  return r ? null : "Please enter a valid mobile number.";
}