Book Image

Designing React Hooks the Right Way

By : Fang Jin
Book Image

Designing React Hooks the Right Way

By: Fang Jin

Overview of this book

React hook creates a unique solution for using states in function components to orchestrate UI communication. They provide you with an easy interface to write custom data management solutions with low development and maintenance costs. Understanding how Hooks are designed enables you to use them more effectively, and this book helps you to do just that. This book starts with a custom-crafted solution to reveal why Hooks are needed in the first place. You will learn about the React engine and discover how each built-in Hook can manage a persistent value by hooking into it. You will walk through the design and implementation of each hook with code so that you gain a solid understanding. Finally, you'll get to grips with each Hook's pitfalls and find out how to effectively overcome them. By the end of this React book, you'll have gained the confidence to build and write Hooks for developing functional and efficient web applications at scale.
Table of Contents (12 chapters)


Appendix A – React Fiber

During the user session with a website, a series of actions is generated. We'd expect to have these actions dispatched and have changes applied back to the Document Object Model (DOM). This cycle is what makes it a typical web experience.

Figure 3.6 – React Fiber with Render and Commit phrases

What React does for us is to allow the dispatched action to update the changes to be reflected on the screen. React splits each update into two major phrases, the Render and the Commit, illustrated in the preceding figure. What a render does is go through all elements one by one and collect all the changes, whereas a commit applies the changes to the UI in one shot.

This engine has a codename, Fiber. To facilitate all this, React creates an internal object called a fiber to represent each element. As we have introduced, the element can be a classical element, such as a DOM element, or an artificial one, such...