Overriding Backbone.View constructor example

NewView.js

/**
 * Store view's clientId to the root element's $.data object. 
 */
var MyView = Backbone.View.extend({
           constructor: function(){
                var view = this,
                    render;

                Backbone.View.prototype.constructor.apply(view, arguments);

                if (view.$el) {
                    view.$el.data('cid', view.cid);
                } else if (view.render){
                    render = view.render;
                    view.render = function(){
                        render.apply(view, arguments);
                        if(view.$el) view.$el.data('cid', view.cid);
                    }
                }
            }
        }),