Pouzitie javascriptu nie je zakazane, iba pouzitie externych kniznic.
"Why no JavaScript libraries?
JavaScript has evolved a lot over the years and many of the pain points JavaScript libraries were created to address no longer exist. JavaScript libraries also add a lot of bulk to your code. In order to encourage folks to use native JavaScript functionality and keep their project as slim as possible, this year we’ve chosen to remove JavaScript libraries from the “free resource” camp."