CODEWITHSUNDEEP
javascript
user460114
user460114

Reputation: 1848

javascript username validation

What would be a good regex to use for validating a username, forbidding all special chars except the "@" symbol in case people want to use their email address as their username?

Upvotes: 1

Views: 9410

Answers (2)

alex
alex

Reputation: 490233

Well I guess this may work for your circumstances (see below)...

var userRegex = /^[\w\.@]{6,100}$/;

This will match...

  • word characters such as 0-9, A-Z, a-z, _
  • literal period
  • literal @
  • between 6 and 100 characters long

You should probably look at the Email RFC, which states, amongst other characters, that the following are legal: ! # $ % & ' * + - / = ? ^ _ `` { | } ~. This means that the regex above will not allow all emails.

So...

var validUsername = document.getElementById('username').value.match(userRegex);

Upvotes: 2

Erik
Erik

Reputation: 91270

^([a-zA-Z0-9.]+@){0,1}([a-zA-Z0-9.])+$

This will permit A-Z, a-z, 0-9 and ., and at most one @

Upvotes: 2

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