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)

Chapter 4: Use State to Jumpstart Components

In the previous chapter, we learned how React designs a hook infrastructure to provide the persistency of a function component. In this chapter, we will begin learning about the built-in hooks in React, starting with the useState hook. We will first explain how the concept of state is used in React, and then we will walk through the data structure and source code behind useState and describe some common use cases for changing states. We'll give useState a test drive, and at the end of the chapter, we'll provide two practical examples of applying useState to the Avatar and Tooltip components.

We will cover the following topics in this chapter:

  • State in React
  • useState design
  • Dispatching states
  • Test driving the useState hook
  • useState examples
  • Questions and answers
  • Appendix