JSFiddle - React, Tailwind, and code Playground
HTML
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script src="http://underscorejs.org/underscore.js"></script>
<script src="http://backbonejs.org/backbone.js"></script>
JavaScript
var eform = new Backbone.Model({
type: 'state',
exemptions: '5'
});
eform.on('change', function(){
console.log('something has changed..');
});
eform.set('exemptions', '2');