JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://dl.dropbox.com/u/1015920/Ext/Ext.ux.ajax.SimXhr.js"></script>
<script src="http://dl.dropbox.com/u/1015920/Ext/Ext.ux.ajax.Simlet.js"></script>
<script src="http://dl.dropbox.com/u/1015920/Ext/Ext.ux.ajax.JsonSimlet.js"></script>
<script src="http://dl.dropbox.com/u/1015920/Ext/Ext.ux.ajax.SimManager.js"></script>

JavaScript

/* handle errors that are thrown not using Ext.raise() */

window.onerror = function(msg, url, lineNumber) {

    console.warn('%s\rurl: %s\rline: %d', msg, url, lineNumber);

    return true; //true means don't propogate the error
}

Ext.application({
    
    errorHandler:function(err){
        console.warn(err);
        return true;
    },
    
    launch: function() {

        Ext.Error.notify = false; /* prevent ie6 and ie7 popup */

        /* handle errors raised by Ext.Error.raise() */
        Ext.Error.handle = this.errorHandler;      

        Ext.Error.raise('your children well');

        //throw 'mama from the train';
    }
});