Socket.io using node.js with no express at all?
Make sure you installed socket.io by npm and have socket.io client as well. For sure you can use socket.io client on CDN:
<script src="https://cdn.socket.io/socket.io-1.4.5.js"></script>For the server side, socket.io should bootstrap the app instance but not http.E.g:
var http = require('http');var socket = require('socket.io');function server()...app = http.createServer(server);io = socket(app);app.listen(80);By default, they use port 80 so that in client-side they just point to localhost like this var socket = io('http://localhost');. If you want to use other port, you must change in io client-side instantiation too.
var socket = io('http://localhost:1337')