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)


Hooks used in this custom hook: useState, useEffect, useRef, and useMemo

One hook everyone wants to get their hands dirty with is useAsync, which is used to fetch an async resource as we introduced in Chapter 5, Use Effect to Handle Side Effects. See Figure 9.3:

Figure 9.3 – useAsync hook

As simple as it sounds, everyone comes with different requirements and implementations for their projects. Here are a few features that we would like to have:

  • Support a loading indicator.
  • Can execute on demand.
  • Support error handling.
  • Can cancel async call.
  • Can cache async data.

The feature list can go on and on. In this book, I will provide a basic version that supports the first two items.

At any point, the call should be aware of the loading state, and when the resource is resolved, the data should be available to use. Also, we'd like to keep a handle on the execute function in case we want to fetch the resource...