Validate email address in Dart? [duplicate]

Answer 1

Using the RegExp from the answers by Eric and Justin,
I made a extension method for String:

extension EmailValidator on String {
  bool isValidEmail() {
    return RegExp(
            r'^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$')
        .hasMatch(this);
  }
}

TextFormField(
  autovalidate: true,
  validator: (input) => input.isValidEmail() ? null : "Check your email",
)

Answer 2

The best regular expression i've came across till now is the following:

r'([a-z0-9][-a-z0-9_+.][a-z0-9])@([a-z0-9][-a-z0-9.][a-z0-9].(com|net)|([0-9]{1,3}.{3}[0-9]{1,3}))'

this approach relies on adding every domain name you want your user to be able to log in with.

i just added com and net since they are the most popular ones but you can simply add more

Answer 3

For that simple regex works pretty good.

var email = "tony@starkindustries.com"
bool emailValid = RegExp(r"^[a-zA-Z0-9.a-zA-Z0-9.!#$%&'*+-/=?^_`{|}~]+@[a-zA-Z0-9]+\.[a-zA-Z]+").hasMatch(email);

Answer 4

I used a simple and not so rigorous validator which also allows anything@string.com and anything@string.co.in domains:

var email = "tony123_90874.coder@yahoo.co.in";
  bool emailValid = RegExp(r'^.+@[a-zA-Z]+\.{1}[a-zA-Z]+(\.{0,1}[a-zA-Z]+)$').hasMatch(email);
  print (emailValid);

Answer 5

I have seen this page a few times when I was searching, and I came up with a simpler Regex for dart which might help those who will come to this page later.

here is the regex:

^[^@]+@[^@]+\.[^@]+

so in dart you can use it like

RegExp(r'^[^@]+@[^@]+\.[^@]+')

It only supports normal emails and not without TLD. for instance, me@email.com but not me@localhost. Hope it helps.