I will try not to be too opinionated in this book about which editor or operating system you should use to work through it (though I am using Atom on macOS X), but you will need a few prerequisites to start.
The first is Node.js. Node is widely used for Web development nowadays, and it's actually just JavaScript that can be run on the command line. Later on, in this book, I'll show you how to write a server application in Node, but for now, let's just concentrate on getting it and npm (the brilliant and amazing package manager that Node uses) installed. If you're on Windows or macOS X without Homebrew, use the installer at https://nodejs.org/en/. If you're on macOS X and are using Homebrew, ...
