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)


Built-in hooks used in this custom hook: useState, useEffect, and useRef

The thinking behind either fixing or improving the React state never ends. One cool idea originates from the question "why can't we just do a plain assignment for states instead of using the dispatch approach?" One of the technical issues blocking us is that the assignment can't be done unless there's an object or something to hold the state. So, if we were to allow the storing of properties under an object like so:

  const p = useProxy({ count: 0, text: '' })

Then we could turn a dispatch into an assignment like the following:

  p.text = 'Hello World'

Let's take a look at how we can design such things with the help of the Proxy introduced by ES6:

const useProxy = (initialObj) => {
  const [,dispatch] = useState(initialObj)  
  const [obj] = useState(new Proxy...