Installing Assuming you’ve already installed Node.js, create a directory to hold your application, and make that your working directory. Express 4.x requires Node.js 0.10 or higher. Express 5.x requires Node.js 18 or higher. $ mkdir myapp $ cd myapp Use the npm init command to create a package.json file for your application. For more information on how package.json works, see Specifics of npm’s pa