email static method

FormFieldValidator<String> email(
  1. String errorMessage
)

Validator that requires the field's value pass an email validation test.

This validator uses Regex of HTML5 email validator.

RegExp(r"^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,253}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,253}[a-zA-Z0-9])?)*$");

Validate that the field matches a valid email pattern

          TextFormField(
           decoration: InputDecoration(
             labelText: 'Email',
           ),
           validator: Validators.email('Invalid email address'),
         ),

Implementation

static FormFieldValidator<String> email(String errorMessage) {
  return (value) {
    if (value == null) {
      value = '';
    }
    if (value.isEmpty)
      return null;
    else {
      final emailRegex = RegExp(
          r"^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,253}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,253}[a-zA-Z0-9])?)*$");
      if (emailRegex.hasMatch(value))
        return null;
      else
        return errorMessage;
    }
  };
}