jQuery Validation Method (RegEx)

Question

$.validator.addMethod('username', function (value) {
    return [A-Za-z0-9\-\_]+.test(value);
}, 'Username can only contain letters, numbers, underscores and dashes.');

I am no good with regular expressions OR jQuery/JavaScript which makes this almost impossible for me.

I simply want to add a method to validate a username to make sure it only has numbers, letters, underscores, and dashes (no spaces, periods, etc) but I can't seem to get it right.

Any help would be appreciated.

javascript regular expression literals must be surrounded by /.../. — jbabey
– jbabey, Commented Oct 31, 2012 at 19:45

Martin Ender · Accepted Answer · 2012-10-31 19:17:46Z

2

There are two problems here. One, the regex needs delimiters. Two, the regex does not check whether the whole string is made up of those letters:

var regex = /^[\w-]+$/;
return regex.test(value);

I also shortened the regex a bit (the character class is the same).

answered Oct 31, 2012 at 19:17

Martin Ender

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Comments

score 0 · Accepted Answer · 2012-10-31 19:38:08Z

0

You want to change your code to:

return (value.match(/^[A-Za-z0-9-_]+$/));

edited Oct 31, 2012 at 19:38

answered Oct 31, 2012 at 19:17

user1726343

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