The JavaScript is still working behind the scenes. Essentially, we get a more granular HTML syntax, which can just load segments instead of whole pages, and can submit Ajax requests.

What you may not know is it also features a command line and API for heavy-duty debugging. Firebug is a Firefox extension used by web developers for debugging HTML, CSS, JavaScript and the browser ...

As you unlock various demo levels on the Cue’s Coding palette, you eventually open up the full JavaScript command palette, and can work with functions and variables.