What you need for this book

The book uses JavaScript as the language of choice throughout. In order to provide a consistent runtime environment, JavaScript Node.js is used throughout the book as the runtime. Other tools from the Node.js ecosystem are used as well, mainly npm as the package manager. To work with the code in the book, you need a version of Node.js, which is available for Windows, Macintosh OS, and Linux from the Node.js website http://nodejs.org/. It comes packaged with npm. For editing code, I recommend using your favorite text editor or IDE. If you don't have one, maybe give Sublime Text or Vim a try, these are also available for Windows, Macintosh OS, and Linux.