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)

useRef examples

A ref is powerful. Because React makes things very reactive, if we want to either disable this reactiveness or add a tweak to it, the ref gives us the opportunity to do that. In this section, we'll look into more examples of how it can be used to solve interesting problems in React.

Clicking outside the menu

Say you have a component, and you want to know when the user clicks outside of it. This is a very popular feature for a popup menu or a modal. Once the menu is visible, we want to dismiss it when the user clicks anywhere outside of it:

Figure 8.5 – Click outside to dismiss

Let's say we have a Menu component displaying a list of menu items:

const Menu = () => {
  const [on, setOOn] = useState(true)
  if (!on) return null
  return (