What does “?”, used after JavaScript filename, means?

Question

For example, having:

So what

Answer 1

It means a variable is being passed to the script via GET, though standard JavaScript files don't support any means of collecting the variable.

You could, however, write a server script in PHP or ASP.NET that sets the content type as application/x-javascript.

Like this in php:

// file: external.php

// regular javascript here that uses $_GET['variable'];

Then you could put this in your HTML script tag: