Whats wrong with my email regex?

Question

I have following regex:

var emailRegex = "^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$"

And when I am trying to type:

asd@asd

It matches. Why?

According to the specs, a TLD by itself is allowed in an address. In practice nobody has such a public address, but it's still valid. — JJJ, Apr 21 '16 at 10:34
The problem is that the backslashes need to escaped as you're using the string to create regex. Either use regex literal or escape the backslashes. — Tushar, Apr 21 '16 at 10:51

score 2 · Answer 1 · answered Apr 21 '16 at 10:34

Email services don't have to be connected to any domain. Following emails are all correct:

cezary@localhost
cezary@192.168.1.100
cezary@domain
cezary@com

See more under "Valid email addresses": https://en.wikipedia.org/wiki/Email_address

So if you want to allow only public emails, try other regexp :-)

score -3 · Answer 2 · edited May 23 '17 at 12:07

-3

Validate email address in JavaScript? answer your question
Try this:

function validateEmail(email) {
    var re = /^(([^<>()\[\]\\.,;:\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,}))$/;
    return re.test(email);
}
alert(validateEmail("test@gmail.com"));

edited May 23 '17 at 12:07

Community

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answered Apr 21 '16 at 10:34

Anh Nam

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Whats wrong with my email regex?

2 Answers2