Regex for domain validation

Question

I have seen a similar question asked here Jquery how to validate domain name but I cannot seem to get this example to work with my code.

I would basically like to perform a reg ex against an input text box, and validate via jquery to see if it matches my search criteria for a domain name. The format must be

domainname.co.uk or .com/.org/.net (no http:// or https:// and no subdomain)

My code currently :

if(!/([a-z0-9-]+\.(?:com|net|org|co.uk))(?:\/|$)/$("#domain").val()) {
        $('#error').html("Invalid domain name, , please correct before proceeding.");
        return false;   
}

Where is the `test` function? – gdoron is supporting Monica Nov 19 '12 at 22:18 — gdoron is supporting Monica, Nov 19 '12 at 22:18
You need to escape the `.` in `co.uk`. – Rocket Hazmat Nov 19 '12 at 22:19 — Rocket Hazmat, Nov 19 '12 at 22:19

score 4 · Accepted Answer · answered Nov 19 '12 at 22:19

4

!/([a-z0-9-]+\.(?:com|net|org|co.uk))(?:\/|$)/$("#domain").val())

Should be:

!/([a-z0-9-]+\.(?:com|net|org|co\.uk))(?:\/|$)/.test($("#domain").val()))
//                              ^              ^^^^^

answered Nov 19 '12 at 22:19

gdoron is supporting Monica

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Thanks so much. Sometimes a fresh set of eyes is the simplest solution! Will accept as answer when initial lock has gone :) – Graeme Leighfield Nov 19 '12 at 22:23
1

@GraemeLeighfield. I know the feeling, had the same thing today with SQL, take a coffee break. – gdoron is supporting Monica Nov 19 '12 at 22:24
gdoron, what do i need to ammend in the regex to not allow http://www. as it doesnt seem to do that at the moment? – Graeme Leighfield Nov 19 '12 at 22:26
1

@GraemeLeighfield, since javascript doesn't have negative lookbehind, I would have use `indexOf`. [Read here for more info](http://stackoverflow.com/questions/641407/javascript-negative-lookbehind-equivalent) – gdoron is supporting Monica Nov 19 '12 at 22:33

Regex for domain validation

1 Answers1