We've covered a lot of territory in this chapter, gaining an understanding of how to use Socket.IO to implement real-time communications between multiple clients connected to the same web application. With this we can now write applications that dynamically send events and data back and forth between the client and the server.
The Socket.IO library can be used to implement any kind of dynamic interaction between client and server. The server can be used as an intermediary for sending messages between users of an application or other peer-server-peer communications.
Specifically, we went over these things:
Implementing the real-time web by holding the server-client connection open
The Comet style protocols
The Socket.IO library
Using EventEmitters to send events within the server
Writing JavaScript code in the browser
Integrating data from the server into JavaScript on the browser
Sending messages between the server and client using Socket.IO
In the next chapter, we'll be wrapping this book...