js function to get filename from url

Question

I have a url like http://www.example.com/blah/th.html

I need a javascript function to give me the \'th\' value from that.

All my urls have the same format (2

Answer 1

url? url.substring(url.lastIndexOf('/')+1, url.lastIndexOf('.')):''

• Safety is as asked for. when url is null or undefined the result is ''.
• Removes all of the path with ':', dots and any symbol including the last '/'.
• This gives the true answer 'th' as asked and not 'th.index'. That is very important of course to have it work at all.

• It allows filename to have several periods!

• Not asked, but you can also have a query string without '/' and '.'

It is a corrected answer from Abhishek Sharma so I gave him an upvote. So genious and minimal one-liner - I saw it there :)