How to get the host URL using JavaScript from the current page

Question

// will return the host name and port
var host = window.location.host; 

or possibly

var host = window.location.protocol + "//" + window.location.host;

or if you like concatenation

var protocol = location.protocol;
var slashes = protocol.concat("//");
var host = slashes.concat(window.location.host);

// or as you probably should do
var host = location.protocol.concat("//").concat(window.location.host);

// the above is the same as origin, e.g. "https://stackoverflow.com"
var host = window.location.origin;

If you have or expect custom ports use window.location.host instead of window.location.hostname

To get the hostname: location.hostname

But your example is looking for the scheme as well, so location.origin appears to do what you want in Chrome, but gets not mention in the Mozdev docs. You can construct it with

location.protocol + '//' + location.hostname

If you want the port number as well (for when it isn't 80) then:

location.protocol + '//' + location.host

You can get the protocol, host, and port using this:

window.location.origin

---

Browser compatibility

Desktop

Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
(Yes)	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)
30.0.1599.101 (possibly earlier)	?	21.0 (21.0)	11	?	7 (possibly earlier, see webkit bug 46558)

Mobile

Android	Edge	Firefox Mobile (Gecko)	IE Phone	Opera Mobile	Safari Mobile
(Yes)	(Yes)	(Yes)	(Yes)	(Yes)	(Yes)
30.0.1599.101 (possibly earlier)	?	21.0 (21.0)	?	?	7 (possibly earlier, see webkit bug 46558)

All browser compatibility is from Mozilla Developer Network

let path = window.location.protocol + '//' + window.location.hostname + ':' + window.location.port;

This should work:

window.location.hostname

Depending on your needs, you can use one of the window.location properties. In your question you are asking about the host, which may be retrieved using window.location.hostname (e.g. www.example.com). In your example you are showing something what is called origin, which may be retrieved using window.location.origin (e.g. http://www.example.com).

var path = window.location.origin + "/";

//result = "http://localhost:60470/"

I like this one depending of purpose

window.location.href.split("/")[2] == "localhost:17000" //always domain + port

You can apply it on any url-string

var url = "http://localhost:17000/sub1/sub2/mypage.html?q=12";
url.split("/")[2] == "localhost:17000"
url.split("/")[url.split("/").length-1] == "mypage.html?q=12"

Removing protocol, domain & path from url-string (relative path)

var arr = url.split("/");
if (arr.length>3)
   "/" + arr.splice(3, arr.length).join("/") == "/sub1/sub2/mypage.html?q=12"