How to find URL domain using JavaScript

Question

I was working on how to find a URL's domain, and thanks to my previous question, I came to this answer:

var domain = (location.host)
        var arr=domain.split(".")
        extension=arr[arr.length-1]

        if(extension=="cnn")
            alert("true");

However, I have 2 problems:

It works fine untill you come across to a site with extension co.uk.
Is there a way to count . from the start and not from the end?

For example, for the website www.cnn.com, it'd start counting from the www, and not from the com.

do you want the domain name and its extension or just the domain name ? — Amit Joki, Mar 09 '14 at 09:49
See also: http://stackoverflow.com/questions/8253136/how-to-get-domain-name-only-using-javascript — Jeroen, Mar 09 '14 at 09:59
What should be return value when CSS.programmers.stackoverflow.com and what for CSS.programmers.stackoverflow.co.in ? — Baljeetsingh Sucharia, Mar 10 '14 at 07:37

Pankaj Gadge · Answer 1 · 2014-03-09T10:00:31.190

0

Okay, here's the edit to make you understand how it works.

Say, your website is "www.cnn.co.uk". If you understand array, this line would return you the array of 4 elements delimited by '.'

var arr=domain.split(".")

i.e. [www, cnn, co, uk];

Now it's really upto you what element you want out of this array. If you know the element name, and you want to retrieve cnn, you can do

`extension = arr[1];`

You can also iterate over an array to get each element.

extension = arr[0];

it will return you www.

edited Mar 09 '14 at 10:00

answered Mar 09 '14 at 09:49

Pankaj Gadge

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OP is asking for domain name – Amit Joki Mar 09 '14 at 09:59
? Thank you hello world – Wind64bit Mar 09 '14 at 10:03
Thats what mate. OP is asking for domain name and not `www`. – Amit Joki Mar 09 '14 at 10:04
when i ran it to cnn.co.uk it doesn't work, despite the fact that it works with cnn.com – Wind64bit Mar 09 '14 at 10:06
@Wind64bit, mine works in that case. So please check out my answer – Amit Joki Mar 09 '14 at 10:08

Amit Joki · Accepted Answer · 2014-03-09T10:13:17.263

-1

Use this function:

function GetDomainName() {
    if (location.host.split('.')[0] == 'www') {
        return location.host.split('.')[1];
    } else {
        return location.host.split('.')[0];
    }
}

Call it like this:

var domainName=GetDomainName();

But remember, this will not work in subdomains like

programmers.stackexchange.com

Demo: http://jsfiddle.net/j7VP6/

edited Mar 09 '14 at 10:13

answered Mar 09 '14 at 09:58

Amit Joki

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@Downvoter, dare to elaborate ? Or just taking revenge? – Amit Joki Mar 09 '14 at 10:06
I am not looking for `www` but for `stackoverflow` only – Wind64bit Mar 09 '14 at 10:09
Yes, I know that. It doesn't give `www` only `stackoverflow` – Amit Joki Mar 09 '14 at 10:10
Did you even check it out ? @Wind64bit – Amit Joki Mar 09 '14 at 10:11

How to find URL domain using JavaScript

2 Answers2