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)

Introducing the React context

The context is modeled with a ReactContext data type holding a _currentValue value.

Figure 7.3 – React context data structure

We can create a context with the createContext function. For instance, if we want to share a piece of user info, we can create a UserContext and hold a defaultValue:

const UserContext = createContext(defaultValue)
export default UserContext

The created context can be shared via a JavaScript export statement, and this way, when any other file or component needs it, it can be imported.

The context allows us to provide the value to all consumers underneath via a Provider property:

import UserContext from './UserContext'
const Branch = () => {
  return (    
    <UserContext.Provider value={...}>