Book Image

Learn React Hooks

By : Daniel Bugl
Book Image

Learn React Hooks

By: Daniel Bugl

Overview of this book

React Hooks revolutionize how you manage state and effects in your web applications. They enable you to build simple and concise React.js applications, along with helping you avoid using wrapper components in your applications, making it easy to refactor code. This React book starts by introducing you to React Hooks. You will then get to grips with building a complex UI in React while keeping the code simple and extensible. Next, you will quickly move on to building your first applications with React Hooks. In the next few chapters, the book delves into various Hooks, including the State and Effect Hooks. After covering State Hooks and understanding how to use them, you will focus on the capabilities of Effect Hooks for adding advanced functionality to React apps. You will later explore the Suspense and Context APIs and how they can be used with Hooks. Toward the concluding chapters, you will learn how to integrate Redux and MobX with React Hooks. Finally, the book will help you develop the skill of migrating your existing React class components, and Redux and MobX web applications to Hooks. By the end of this book, you will be well-versed in building your own custom Hooks and effectively refactoring your React applications.
Table of Contents (19 chapters)
Free Chapter
Section 1: Introduction to Hooks
Section 2: Understanding Hooks in Depth
Section 3: Integration and Migration

Undo/Redo with Hooks

In some apps, we want to implement undo/redo functionality, which means that we can go back and forth in the state of our app. For example, if we have a text editor in our blog app, we want to provide a feature to undo/redo changes. If you learned about Redux, you might already be familiar with this kind of functionality. Since React now provides a Reducer Hook, we can reimplement the same functionality using only React. The use-undo library provides exactly this functionality.

The useUndo Hook takes the default state object as an argument, and returns an array with the following contents: [ state, functions ].

The state object looks as follows:

  • present: The current state
  • past: Array of past states (when we undo, we go here)
  • future: Array of future states (after undoing, we can redo to go here)

The functions object returns various functions to interact with...