validateEmail method

String? validateEmail(
  1. String input
)

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;
  }
}