A simple example of NodeJS + Express + Socket. io

A simple example of NodeJS + Express + Socket. io
2. initialize a NodeJS web application: Open the CMD window. Run cmd: "mkdir myapp" to create a new folder named myapp. Run cmd: "cd myapp" and switch to the myapp folder. Run cmd: "npm init" to create the file package. json. 3. Express entry application: In the above CMD window, run cmd: "npm install express -- save", install "express" node_module, and "-- save" to save express to package. json. Add the app. js file to the myapp folder. Assume that the main file in package. json is app. js. Copy code // app. js var app = require ('express ') (); var http = require ('http '). server (app); app. get ('/', function (req, res) {res. send ('