Get The Current Domain Name With Javascript (Not the path, etc.)

Question

I plan on buying two domain names for the same site. Depending on which domain is used I plan on providing slightly different data on the page. Is there a way for me to detect the actual domain name that the page is loading from so that I know what to change my content to?

I've looked around for stuff like this but most of it doesn't work the way I want it to.

For instance when using

document.write(document.location)

on JSFiddle it returns

http://fiddle.jshell.net/_display/

i.e. the actual path or whatever that is.

Answer 1

How about:

window.location.hostname

The location object actually has a number of attributes referring to different parts of the URL

Answer 2

Let's suppose you have this url path:

http://localhost:4200/landing?query=1#2

So, you can serve yourself by the location values, as follow:

window.location.hash: "#2"
​
window.location.host: "localhost:4200"
​
window.location.hostname: "localhost"
​
window.location.href: "http://localhost:4200/landing?query=1#2"
​
window.location.origin: "http://localhost:4200"
​
window.location.pathname: "/landing"
​
window.location.port: "4200"
​
window.location.protocol: "http:"

window.location.search: "?query=1"

Now we can conclude you're looking for:

window.location.hostname

Answer 3

If you are not interested in the host name (for example www.beta.example.com) but in the domain name (for example example.com), this works for valid host names:

function getDomainName(hostName)
{
    return hostName.substring(hostName.lastIndexOf(".", hostName.lastIndexOf(".") - 1) + 1);
}

Answer 4

function getDomain(url, subdomain) {
    subdomain = subdomain || false;

    url = url.replace(/(https?:\/\/)?(www.)?/i, '');

    if (!subdomain) {
        url = url.split('.');

        url = url.slice(url.length - 2).join('.');
    }

    if (url.indexOf('/') !== -1) {
        return url.split('/')[0];
    }

    return url;
}

Examples

• getDomain('http://www.example.com'); // example.com
• getDomain('www.example.com'); // example.com
• getDomain('http://blog.example.com', true); // blog.example.com
• getDomain(location.href); // ..

Previous version was getting full domain (including subdomain). Now it determines the right domain depending on preference. So that when a 2nd argument is provided as true it will include the subdomain, otherwise it returns only the 'main domain'

Answer 5

You can get it from location object in Javascript easily:

For example URL of this page is:

http://www.stackoverflow.com/questions/11401897/get-the-current-domain-name-with-javascript-not-the-path-etc

Then we can get the exact domain with following properties of location object:

location.host = "www.stackoverflow.com"
location.protocol= "http:"

you can make the full domain with:

location.protocol + "//" + location.host

Which in this example returns http://www.stackoverflow.com

I addition of this we can get full URL and also the path with other properties of location object:

location.href= "http://www.stackoverflow.com/questions/11401897/get-the-current-domain-name-with-javascript-not-the-path-etc"    
location.pathname= "questions/11401897/get-the-current-domain-name-with-javascript-not-the-path-etc"

Answer 6

Since this question asks for domain name, not host name, a correct answer should be

window.location.hostname.split('.').slice(-2).join('.')

This works for host names like www.example.com too.

Answer 7

Use

document.write(document.location.hostname)​

window.location has a bunch of properties. See here for a list of them.

Answer 8

If you are only interested in the domain name and want to ignore the subdomain then you need to parse it out of host and hostname.

The following code does this:

var firstDot = window.location.hostname.indexOf('.');
var tld = ".net";
var isSubdomain = firstDot < window.location.hostname.indexOf(tld);
var domain;

if (isSubdomain) {
    domain = window.location.hostname.substring(firstDot == -1 ? 0 : firstDot + 1);
}
else {
  domain = window.location.hostname;
}

http://jsfiddle.net/5U366/4/

Answer 9

If you wish a full domain origin, you can use this:

document.location.origin

And if you wish to get only the domain, use can you just this:

document.location.hostname

But you have other options, take a look at the properties in:

document.location

Answer 10

What about this function?

window.location.hostname.match(/\w*\.\w*$/gi)[0]

This will match only the domain name regardless if its a subdomain or a main domain

Answer 11

If you want to get domain name in JavaScript, just use the following code:

var domain_name = document.location.hostname;
alert(domain_name);

If you need to web page URL path so you can access web URL path use this example:

var url = document.URL;
alert(url);

Answer 12

I figure it ought to be as simple as this:

url.split("/")[2]

Answer 13

for my case the best match is window.location.origin

Answer 14

Combining a few answers from the above, the following works really well for me for destroying Cookies:

  /**
   * Utility method to obtain the domain URI:
   */
  fetchDomainURI() {
    if (window.location.port.length > 0) {
      return window.location.hostname;
    }
    return `.${window.location.hostname.match(/\w*\.\w*$/gi)[0]}`;
  }

Works for IP addresses with ports, e.g., 0.0.0.0:8000 etc, as well as complex domains like app.staging.example.com returning .example.com => allows for cross-domain Cookie setting and destroying.

Answer 15

window.location.hostname is a good start. But it includes sub-domains, which you probably want to remove. E.g. if the hostname is www.example.com, you probably want just the example.com bit.

There are, as ever, corner cases that make this fiddly, e.g. bbc.co.uk. The following regex works well for me:

let hostname = window.location.hostname;
// remove any subdomains, e.g. www.example.com -> example.com
let domain = hostname.match(/^(?:.*?\.)?(\w{3,}\.(?:\w{2,8}|\w{2,4}\.\w{2,4}))$/)[1];
console.log("domain: ", domain);

Answer 16

I'm new to JavaScript, but cant you just use: document.domain ?

Example:

<p id="ourdomain"></p>

<script>
var domainstring = document.domain;
document.getElementById("ourdomain").innerHTML = (domainstring);
</script>

Output:

domain.com

or

www.domain.com

Depending on what you use on your website.

Answer 17

Feel free to visit our “<a href="javascript:document.location.href=document.location.origin+'/contact-us'" title="Click to Contact Us" class="coded_link" >Contact” link

Indeed worked for me whereas I couldn't use PHP

Just tested that it worked thanks to the approach mentioned above in some of the answers, so quick and verified that worked