[javascript] how to get the host url using javascript from the current page

Given that I'm on the following page:

http://www.webmail.com/pages/home.aspx

How can I retrieve the host name ("http://www.webmail.com") with JavaScript?

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

window.location.origin

Browser compatibility

Desktop

Mobile

All browser compatibility is from Mozilla Developer Network

Keep in mind before use window and location

1.use window and location in client side render (Note:don't use in ssr)

window.location.host; 

or

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

2.server side render

if your using nuxt.js(vue) or next.js(react) refer docs

For nuxt js Framework

req.headers.host

code:

async asyncData ({ req, res }) {
        if (process.server) {
         return { host: req.headers.host }
        }

Code In router:

export function createRouter (ssrContext) {



console.log(ssrContext.req.headers.host)   
      return new Router({
        middleware: 'route',
        routes:checkRoute(ssrContext),
        mode: 'history'
      })
    }

For next.js framework

Home.getInitalProps = async(context) => {
   const { req, query, res, asPath, pathname } = context;
   if (req) {
      let host = req.headers.host // will give you localhost:3000
     }
  }

For node.js users

var os = require("os");
var hostname = os.hostname();

or

request.headers.host

For laravel users

public function yourControllerFun(Request $request) {

    $host = $request->getHttpHost();

  

    dd($host);

}

or

directly use in web.php

Request::getHost();

Note :

both csr and ssr app you manually check example ssr render

if(req.server){
host=req.host;
}
if(req.client){
host=window.location.host; 
}

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

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

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"

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/"

This should work:

window.location.hostname