JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://docs.sencha.com/extjs/4.1.3/extjs-build/resources/css/ext-all.css">

JavaScript

Ext.create('Ext.Panel', { 
    layout: 'fit',
    renderTo: Ext.getBody(),
    buttons: [{
        text: 'Select'
    },'->',{
        text: 'Advanced options'
    },{
        text: 'Back'
    }]
});