HTML page
This sort of resource makes it easy to develop a complete single web page within Moodle, especially when you are using Moodle's WYSIWYG HTML editor.
The page is stored in the database, not as a file, and you have a lot of freedom to do almost anything you like using HTML, including Javascript.
Discaimer: This project has been funded with support from the European Commission. The presentation reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.