[msurguy]

Sure. I'll clarify about the material and progression so that it's clear.

First you build the HTML of the form (chapter 1 covers that). Then you learn how to work with visual feedback (spinners and alerts, chapters 2 & 3). Then creating AJAX contact form integrates the stuff from chapters 1-3 to create AJAX contact form and connect it with the backend. Chapter 5 goes a step further - building login and registration forms using stuff from chapters 1-4 plus inline validation, integrating all previous components and things you built.

The book isn't for noobs. The prerequisites section (https://leanpub.com/frontend/read#leanpub-auto-about-the-aut...) clearly explains that so the developers who don't understand JS semantics or don't know the basics of web applications should learn something else before they get back to this book.