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 side effect?

    A side effect is when a function relies on or modifies something outside of its input arguments. A very common side effect is the use of console.log inside a function.

  2. What is useEffect?

    The useEffect hook is a way of defining a side effect callback to be invoked after a screen update in React. The effect can be invoked every time or when one of its dependencies changes. Therefore, the useEffect hook can be also used for listening for value changes.

  3. What are the most common uses of useEffect?

    The useEffect hook is a common hook in the React family. If used along with the useState hook, it can easily communicate with external resources and bring results on screen. External resources can be web servers, DOM elements, window objects, document objects, or any third-party entities.