Who this book is for

If you want to learn about the fundamentals of XMPP, be able to work with the core functionality both server-side and in the browser, then this book is for you. No knowledge of XMPP is required, or of TCP/IP networking. It's important that you already know how to build applications of some form, and are looking get a better understanding of how to implement XMPP for one or more of its many uses. You should be interested in the decentralized web, know HTML, and know JavaScript and NodeJS. You will probably know JSON, and hopefully XML (this is the native output of XMPP).