module.html
This folder contains the HTML for your module to be displayed within the UI. The HTML, Javascript and PHP all work together to create a responsive and dynamic module.
module.info
This simple JSON file contains the basic information about your module, such as name, version and author.
js/
The js folder contains all of the Javascript for your module. Note that you do not need to include jquery or bootstrap libraries as they are already built into the UI.
api/
The api folder contains the PHP for your module. The module.php file must contain a class that extends the Module class.