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
– Amit Joki, Commented Mar 9, 2014 at 9:49

Pankaj Gadge · Accepted Answer · 2014-03-09 10:00:31Z

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 9, 2014 at 10:00

answered Mar 9, 2014 at 9:49

Pankaj Gadge

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5 Comments

Amit Joki Over a year ago

OP is asking for domain name

Wind64bit Over a year ago

? Thank you hello world

Amit Joki Over a year ago

Thats what mate. OP is asking for domain name and not www.

Wind64bit Over a year ago

when i ran it to cnn.co.uk it doesn't work, despite the fact that it works with cnn.com

Amit Joki Over a year ago

@Wind64bit, mine works in that case. So please check out my answer

Amit Joki · Accepted Answer · 2014-03-09 10:13:17Z

-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 9, 2014 at 10:13

answered Mar 9, 2014 at 9:58

Amit Joki

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4 Comments

Amit Joki Over a year ago

@Downvoter, dare to elaborate ? Or just taking revenge?

Wind64bit Over a year ago

I am not looking for www but for stackoverflow only

Amit Joki Over a year ago

Yes, I know that. It doesn't give www only stackoverflow

Amit Joki Over a year ago

Did you even check it out ? @Wind64bit

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