Book Image

Micro State Management with React Hooks

By : Daishi Kato
Book Image

Micro State Management with React Hooks

By: Daishi Kato

Overview of this book

State management is one of the most complex concepts in React. Traditionally, developers have used monolithic state management solutions. Thanks to React Hooks, micro state management is something tuned for moving your application from a monolith to a microservice. This book provides a hands-on approach to the implementation of micro state management that will have you up and running and productive in no time. You’ll learn basic patterns for state management in React and understand how to overcome the challenges encountered when you need to make the state global. Later chapters will show you how slicing a state into pieces is the way to overcome limitations. Using hooks, you'll see how you can easily reuse logic and have several solutions for specific domains, such as form state and server cache state. Finally, you'll explore how to use libraries such as Zustand, Jotai, and Valtio to organize state and manage development efficiently. By the end of this React book, you'll have learned how to choose the right global state management solution for your app requirement.
Table of Contents (16 chapters)
Part 1: React Hooks and Micro State Management
Part 2: Basic Approaches to the Global State
Part 3: Library Implementations and Their Uses

Using React Tracked with useState and useReducer

The primary use case of React Tracked is to replace a use case of React Context. The API in React Tracked is specifically designed for this use case.

We will explore two usages with useState and useReducer. First, let's learn about the usage with useState.

Using React Tracked with useState

Before exploring the usage of React Tracked with useState, let's revisit how we can create a global state with React Context.

We first create a custom hook, which calls useState with an initial state value:

const useValue = () =>
  useState({ count: 0, text: "hello" });

Defining the custom hook is good for TypeScript because you can grab the type with the typeof operator.

The following is a definition of our Context:

const StateContext = createContext<
  ReturnType<typeof useValue> | null

It has a type annotation in TypeScript. The default value is null.