Register the index route of your app that returns the HTML file Var io = require('socket.io').listen(server) Pass a http.Server instance to the listen method ![]() You need to understand this to prevent known errors like "SocketIO: err_connection_refused". Note: to start the server by itself, the listen method needs to be executed from the server variable, not the app itself. The variable server is the returned object of the createServer method (which receives the express app as first parameter) and in turn, the server variable will be used as first parameter in the listen method of the socket.io module.Ĭreate a file (named server.js) wherever you want and add the following code on it: In order to work correctly with Express and Socket.IO we need to require the http module of node.js as it will be at charge of the server. Likewise, install Socket.IO in your project executing the following command in your Node.js console: npm install socket.io -saveĪnd you're ready to get started! Implementation Install Express on your project executing the following command in your Node.js console: npm install express -save In this article, you'll learn how to put to work Socket.IO and Express Framework, the minimalist web framework easily in a couple of minutes. Besides, it handles browser inconsistencies and varying support levels for you and is a lot of easier to work with instead of vanilla web sockets, at least at the moment. Socket.IO handles graceful degradation for you to numerous technical alternatives to get bi-directional near-time communication flowing (web sockets, ajax long polling, flash, etc). ![]() ![]() Sockets abstract the network into something easier to handle and to work with. Socket.IO enables real-time bidirectional event-based communication, it works on every platform, browser or device, focusing equally on reliability and speed.
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