Who should read this book?
You need basic knowledge of JavaScript to survive this book. This book will not teach you JavaScript. If you’re comfortable with JavaScript itself but have never used a JavaScript framework or library before, this book is for you.
If you’re learning React after using other JavaScript libraries, this book will also have an answer to the “Why?” question that’s probably on your mind: Why bother learning something new? React is a JavaScript library that can be used to describe views (for example, HTML elements) based on some state (which is often in the form of data). When you’re working with React in a
browser, React can mount the described views in the browser’s DOM (Document Object Model) and automatically update what needs to be updated whenever the original state changes.
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