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

Adding an array structure

An array structure is tricky to handle in React. When a component renders an array structure, we need to pass stable key properties to the array items. This is especially necessary when we remove or reorder the array items.

In this section, we'll learn how to handle array structures in Jotai. We'll start with a traditional approach, and then a new pattern that we call Atoms-in-Atom.

Let's use the same to-do app example that we used in the Handling structured data section of Chapter 7, Use Case Scenario 1 – Zustand.

First, we define a Todo type. It has the id string, title string, and done Boolean properties, as illustrated in the following code snippet:

type Todo = {
  id: string;
  title: string;
  done: boolean;

Next, we define todosAtom, which represents an array of defined Todo items, as follows:

const todosAtom = atom<Todo[]>([]);

We annotate the atom() function with the...