Book Image

React 16 Essentials - Second Edition

By : Christopher Pitt, Artemij Fedosejev, Adam Boduch
Book Image

React 16 Essentials - Second Edition

By: Christopher Pitt, Artemij Fedosejev, Adam Boduch

Overview of this book

React 16 Essentials, Second Edition, fully updated for React 16, takes you on a fast-paced journey through building your own maintainable React 16 applications. React experts Artemij Fedosejev and Adam Boduch give you all the essentials you need to know and start working with React 16, in this new edition of the best-selling React.js Essentials title. You'll find the latest React 16 code updates, assessment of React Fiber, new coverage of Redux, and how to work as a modern React developer. The authors offer you their current assessment of React Fiber, and you'll soon be exploring React 16 hands on, creating your own single and multiple user interface elements with React 16. You'll then see how to create stateless and stateful components and make them reactive. You'll also learn to interact between your components and lifecycle methods, and gauge how to effectively integrate your user interface components with other JavaScript libraries. Delve deep into the core elements of the Redux architecture and learn how to manage your application and data persistence. Then go the extra mile with the Jest test framework, and run multiple tests on your applications and find solutions to scale without complexity. Today React is used by Facebook, Instagram, Khan Academy, and Imperial College London, to name a few. Many new users recognize the benefits of React and adopt it in their own projects, forming a fast-growing community. The speed at which React has evolved promises a bright future for anyone who invests in learning it today. Let Artemij and Adam bring you a brand new look at React 16 and React Fiber, and move your web development into the future.
Table of Contents (20 chapters)
React 16 Essentials Second Edition
About the Authors
About the Reviewers
Customer Feedback
Free Chapter
What's New in React 16

Stateless versus stateful

To react means to switch from one state to another. This means that you need to have a state in the first place and the ability to change that state. Have we mentioned a state or the ability to change that state in React elements? No. They are stateless. Their sole purpose is to construct and render virtual DOM elements. In fact, we want them to render in the exact same way, given that we provide them with exactly the same set of parameters. We want them to be consistent because it makes it easy for us to reason about them. This is one of the key benefits of using React—the ease of reasoning about how our web application works.

How can we add state to our stateless React elements? If we can't encapsulate state in React elements, then we should encapsulate React elements in something that already has state. Think of a simple state machine that represents a user interface. Every user action triggers a change of a state in that state machine. Every state is represented...