Get relative URL from absolute URL

Question

I want to get the relative URL from an absolute URL in JavaScript using regex and the replace method.

I tried the following but it is not working:

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Answer 1

URL.getRelativeURL

There's an public-domain extension for the standard URL object called getRelativeURL.
It's got a few cool tweaks like force reload, you should check it out!

Try it live.       View on Gist.

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Example usage

//syntax: .getRelativeURL()

//link from Mypage to Google
a = new URL("https://google.com/search");
a.getRelativeURL("https://mypage.com")
== "//google.com/search";

//link from the current location.href
a.getRelativeURL();

//link from Olutsee to Polk
var from = new URL("http://usa.com/florida/baker/olutsee");
var to   = new URL("http://usa.com/florida/polk");
to.getRelativeURL(from) == "../../polk";