fie is a framework for Ruby on Rails that shares the state of your views with the backend.
For each controller within which you wish to use fie, you must create a commander. fie uses commanders in the same way a Ruby on Rails application uses controllers.
When an instance variable is changed in the commander, the view is updated. Likewise, if the same variable is modified within the view (through a form for example), the change is reflected in the commander and within other instances of the variable in the view. This means that fie supports three-way data binding.