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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

Using Hooks for advanced effects

There are two special versions of the Effect Hook: the Layout Effect Hook and the Insertion Effect Hook. These are only needed for very specific use cases, so we are only briefly covering them here.

useLayoutEffect

The Layout Effect Hook is identical to the Effect Hook, but it fires synchronously after all DOM mutations are completed and before the component is rendered in the browser. It can be used to read information from the DOM and adjust the appearance of components before rendering. Updates inside this Hook will be processed synchronously before the browser renders the component.

Do not use this Hook unless it is really needed, which is only in certain edge cases. useLayoutEffect will block visual updates in the browser, and thus, is slower than useEffect.

The rule here is to use useEffect first. If your mutation changes the appearance of the DOM node, which can cause it to flicker, you should use useLayoutEffect instead.

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Learn React Hooks
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