How to get the http://www.blbah.com part of the url in javascript?

Question

My url on a page is like:

http://www.example.com/dir1/file.html?a=1

I need to extract:

http://www.example.com

how can I do this in javascript?

Answer 1

The window.location is an object with useful properties for this, details in this JSBin .

For that JSBin URL ( http://jsbin.com/etima ), here's what you see (with some irrelevancies removed):

• href : http://jsbin.com/etima
• protocol : http:
• hostname : jsbin.com
• host : jsbin.com
• port :
• pathname : /etima
• search :
• hash :

So basically, combine the protocol , the hostname , and the port if any:

var loc, result;
loc = window.location;
result = loc.protocol + "//" + loc.hostname;
if (loc.port) {
    result += ":" + loc.port;
}

Answer 2

document.location.protocol + '//'+document.domain

Answer 3

你可能会发现http://blog.stevenlevithan.com/archives/parseuri / http://stevenlevithan.com/demo/parseuri/js/有趣