Exact filename from URL

extract-filename-from-url.js

function getFileName() {
  //this gets the full url
  var url = document.location.href;
  //this removes the anchor at the end, if there is one
  url = url.substring(0, (url.indexOf("#") == -1) ? url.length : url.indexOf("#"));
  //this removes the query after the file name, if there is one
  url = url.substring(0, (url.indexOf("?") == -1) ? url.length : url.indexOf("?"));
  //this removes everything before the last slash in the path
  url = url.substring(url.lastIndexOf("/") + 1, url.length);
  //return
  return url;
}