referenceerror

I am writing an application for Android 2.3.5 (that will also be compatible with iOS). I wish to transfer data from the app's HTML/Javascript to a Python program on a server (which uses the Twisted engine to retrieve the data). I've tried many things and looked at various forums, answers, tutorials, and web pages--including most of them here--and can't find an answer. Here's the relevant Javascript I have in my index.html file: <script src="socket-lib/socket.io.js"></script> <script type="text/javascript" charset="utf-8"> function sendData() { try { var socket = io.connect('http://mywebsite

In javascript window is the global object, which means every object in the global scope is a child of window . So why I get this result: console.log(window.foo); // No error, logs "undefined". console.log(foo); // Uncaught ReferenceError: foo is not defined. Fiddle Those two lines should be the same, shouldn't they? Because with window.foo you are explicitly looking for foo property of window object which is not the case in latter option. In the latter option, if foo isn't defined, you should as developer be able to know that it isn't defined and get the clear error warning rather than