email static method

String? email(
  1. String? value
)

Implementation

static String? email(String? value) {
  if (value == null || value.trim().isEmpty) return 'Email is required';
  final regex = RegExp(r'^[\w-.]+@([\w-]+\.)+[\w-]{2,4}$');
  if (!regex.hasMatch(value.trim())) return 'Invalid email';
  return null;
}