Developers come to the world of web app development via many paths and are not always grounded in the basic technologies that web apps rely on. In this chapter, I provide a brief primer for HTML and introduce the Bootstrap CSS library, which I use to style the examples in this book. In Chapter 4, I introduce the basics of JavaScript and give you the information you need to understand the examples in the rest of the book. If you are an experienced developer, you can skip these primer chapters and jump right to Chapter 5, where I use Vue.js to create a more complex and realistic application.
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