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)

Questions and answers

Here are some questions and answers to refresh your knowledge:

  1. What is a React hook?

    A React hook is a special function that allows us to have persistent states for a function component. The calling order of hooks is used as an internal key of the states, thus, when we use hooks, we don't need to specify a key. We can have as many hooks as we want under one function component, and each hook can be used for a different purpose.

  2. How can we avoid conditional hooks?

    Each hook with a specific calling order gets stored under the hook list. React doesn't allow the change of this calling order at runtime, thus we should avoid it when using hooks inside a condition, a loop, or any structure that varies its calling order. Instead, we can move all hook statements to the front section of the function to pre-bake their calling orders while leaving the conditional logic afterward before the return statement.