In this demo one element in the email has been marked with
mde-module-container (the white content area).
Its child elements are considered individual modules.
You can perform basic module editing tasks:
For the AddModules-plugin, the template source code is given and the plugin extracts the individual modules from it. This source code can of course differ from the actual template the user is editing (i.e. contain more modules than in the active template).
Any animations you see are implemented using CSS transitions and can be customized.
Source template can be viewed here: template-kitchen-sink.html