validateEmail method
Implementation
String? validateEmail(String input) {
const pattern = r'(^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$)';
final regExp = RegExp(pattern);
if (input.isEmpty) {
return 'Entry Required';
} else if (!regExp.hasMatch(input)) {
return 'Invalid Email';
} else {
return null;
}
}