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

This should work for all cases

function getFilenameFromUrl(url) {
  const pathname = new URL(url).pathname;
  const index = pathname.lastIndexOf('/');
  return (-1 !== index) ? pathname.substring(index + 1) : pathname;
}