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Learn React Hooks

Learn React Hooks - Second Edition

By : Bugl
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Learn React Hooks

Learn React Hooks

By: Bugl

Overview of this book

React Hooks allow you to easily encapsulate, reuse, and refactor logic with the same level of simplicity that components bring to user interface organization. In this second edition, React expert and author of many popular React books, Daniel Bugl guides you through the full spectrum of React Hooks, and teaches you how to handle forms, routing, and data fetching in modern React development. This edition is fully updated to React 19, with a revamped structure, expanded real-world use cases, and coverage of all newly introduced Hooks. Starting with the fundamentals, you'll gain a deep understanding of how Hooks work under the hood and how to apply Hooks patterns efficiently. The chapters guide you through using State, Reducer, and Effect Hooks to manage application state, side effects, and complex logic for building your first Hook-based app. You'll utilize Suspense and Context APIs for streamlined data fetching and state management, master Form Actions for handling submissions, and implement routing with Hooks. You’ll also create custom Hooks for advanced functionality and write tests for reliability. Finally, you’ll learn how to refactor an existing app with class components into modern Hooks architecture. By the end of this React book, you'll be well-equipped to use React Hooks to modernize and optimize your React projects.
Table of Contents (19 chapters)
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1
Introduction to Hooks
5
Using Hooks With Real-World Examples
13
Refactoring and Migrating Existing Code
17
Other Books You May Enjoy
18
Index

Testing custom Hooks

Now our blog application fully makes use of Hooks! We even defined custom Hooks for various functions to make our code more reusable, concise, and easy to read.

When creating custom Hooks, it also makes sense to write unit tests for them to ensure they work properly, even when we change them later on or add more options. We are going to use Vitest to write our unit tests. Vitest and Vite go very well together, because Vitest can read and use Vite configurations. Vitest also offers a Jest-compatible API. Jest is another very popular testing framework. If you are already familiar with Jest, learning Vitest will be a breeze. Additionally, Vitest is very fast and well equipped for modern web apps.

However, as a result of the rules of Hooks, we cannot call Hooks from the test functions because they can only be called inside the body of a functional React component. As we do not want to create a component specifically for each test, we are going to use the React...

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Learn React Hooks
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