Question

I have a javascript file that I reference in HTML with standard <script src="foo.js?param"></script>. In the file I want to distinguish e.g. loading the file with foo.js from foo.js?auto and foo.js?noauto=true, but not if the file is renamed to bar.js and referenced with the same parameter. How can I accomplish this, preferably not using any framework?

Answer 1

Take a look a scriptaculous’ approach:

var js = /scriptaculous\.js(\?.*)?$/;
$$('head script[src]').findAll(function(s) {
  return s.src.match(js);
}).each(function(s) {
  var path = s.src.replace(js, ''),
  includes = s.src.match(/\?.*load=([a-z,]*)/);
  (includes ? includes[1] : 'builder,effects,dragdrop,controls,slider,sound').split(',').each(
   function(include) { Scriptaculous.require(path+include+'.js') });
});

I think it runs through all script elements and finds the reference to itself, and then parses that URL.