JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.3.3/underscore-min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.2/backbone-min.js"></script>

JavaScript

// Say I have a class `Panel` (model in this example);

var Panel = Backbone.Model.extend({
    defaults : {
        name : 'my-panel'
    }
});

// And then an `AdvancedPanel`;

var AdvancedPanel = Panel.extend({
    defaults : {
        label : 'Click to edit'
    }
});

// The following doesn't work:

var advancedPanel = new AdvancedPanel();
alert(advancedPanel.get('name')); // Undefined :(