How to extract part of location.href in JavaScript?

Question

In this example, what's the regexp to to extract 'first' from location.href, such as:

http://www.mydomain.com/first/

Answer 1

Perhaps not an answer to your question, but if you're writing in Javascript, you probably want to use location.pathname rather than extract it yourself from the entire href.

Answer 2

window.location.pathname

Answer 3

Since you asked for a regex solution, this would be it:

^(?:[^:]+://)?[^/]+/([^/]+)

This matches all of these variants (match group one would contain "first" in any case):

• http://www.mydomain.com/first/
• http://www.mydomain.com/first
• https://www.mydomain.com/first/
• https://www.mydomain.com/first
• www.mydomain.com/first/ (this one and the next would be for convenience)
• www.mydomain.com/first

To make it "http://"-only, it gets simpler:

^http://[^/]+/([^/]+)

Answer 4

you can use window.location.host and window.location.search just check out this page for details

Answer 5

var re = /^http:\/\/(www.)?mydomain\.com\/([^\/]*)\//;
var url = "http://mydomain.com/first/";

if(re.test(url)) {
  var matches = url.match(re);
  return matches[2]; // 0 contains whole URL, 1 contains optional "www", 2 contains last group
}