# Somewhere before MyApp.run()

Batman.DOM.events.drag = (node, callback) ->
    $(node).draggable
        stop: (event, ui) ->
            callback(node, event, ui)


# Model

class MyModel extends Batman.Model
    drag: (node, evt, ui) ->
        # Do stuff
        @save()


# Template

<div data-event-drag="task.drag"></div>