/** element view **/
App.elemOneView = Ember.View.create({
 name: 'element One',
 cssAttr: {},
 ...

});

/** element controller**/
App.elemController = Ember.ArrayController.create({
 content: [],
  ....

});

/** element model **/
App.elemOneModel = Ember.Model.create({
 name: 'element one',
 cssAttrBinding: 'App.elemOneView.cssAttr'
 ...
});