I wrote these examples for just learning Socket.IO. It support socket.io v1.0+. There are two examples. One uses node.js http server. Another uses express 4 server.
You can see this demo in here. The design is from socket.io official website.
Install npm dependencies.
$ npm install
To run an example using node.js http server:
$ bin/http
To run an example using express 4 server:
$ bin/express