How to pull url file extension out of url string using javascript

Question

How do I find the file extension of a URL using javascript? example URL:

http://www.adobe.com/products/flashplayer/include/marquee/design.swf?width=792&height=294 

I just want the 'swf' of the entire URL. I need it to find the extension if the url was also in the following format

http://www.adobe.com/products/flashplayer/include/marquee/design.swf 

Obviously this URL does not have the parameters behind it.

Anybody know?

Thanks in advance

Answer 1

function get_url_extension( url ) {     return url.split(/[#?]/)[0].split('.').pop().trim(); } 

example:

get_url_extension('https://example.com/folder/file.jpg'); get_url_extension('https://example.com/fold.er/fil.e.jpg?param.eter#hash=12.345'); 

outputs ------> jpg