JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://dev.sencha.com/deploy/ext-4.0.0/ext-all-debug.js"></script>
<link rel="stylesheet" href="http://dev.sencha.com/deploy/ext-4.0.0/resources/css/ext-all.css">

JavaScript

Ext.onReady(function(){
Ext.define('EAM.utils.Utils', {
    alternateClassName: 'EAM.Utils',
    statics: {
        /**
         * Checks a JSON object if a certain property exists.
         * 
         * Usage:
         *
         *        var obj = { 
         *            me: {
         *                life: {answer: 42}, 
         *                universe: {answer: 42}, 
         *                everything: {answer: 42}
         *            }
         *        };
         *        console.log(EAM.Utils.propertyExists(obj, 'me.life.answer')); //returns true
         *        console.log(EAM.Utils.propertyExists(obj, 'me.universe.answer')); //returns true
         *        console.log(EAM.Utils.propertyExists(obj, 'me.life.question')); //returns false
         *        console.log(EAM.Utils.propertyExists(obj, 'property.im.not.sure.exists')); //returns false
         *
         * @param {Object} obj - The JSON Object to iterate over to look for the property.
         * @param {String} property - The property that needs to be found.
         * @return {Boolean} true if the property is found, false otherwise
         */
        propertyExists: function(obj, property) {
            if (Ext.isEmpty(property) || Ext.isEmpty(obj)) {
                return false;
            }
            var props = property.split('.'),
                count,
                prop;

            for (count = 0, len = props.length; count < len; count++) {
                prop = props[count];
                if (Ext.isObject(obj) && obj.hasOwnProperty(prop)) {
                    obj = obj[prop];
                } else {
                    return false;
                }
            }
            return true;
        }
    }
});

myPanel = Ext.create('Ext.panel.Panel', {
    title: 'Test',
    html: '',
    height: 200,
    renderTo: document.body
});

var obj = {
    me: {
        life: {answer: 42}, 
        universe: {answer: 42}, 
        everything: {answer: 42}
   ...