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

Utilizing proxies to detect mutations and create an immutable state

Valtio creates immutable objects from mutable objects with proxies. We call the immutable object a snapshot.

To create a mutable object wrapped in a proxy object, we use the proxy function exported by Valtio.

The following example is to create an object with a count property:

import { proxy } from "valtio";
const state = proxy({ count: 0 });

The state object returned by the proxy function is a proxy object that detects mutations. This allows you to create an immutable object.

To create an immutable object, we use the snapshot function exported by Valtio, as follows:

import { snapshot } from "valtio";
const snap1 = snapshot(state);

Though the state variable is { count: 0 } and the snap1 variable is { count: 0 }, state and snap1 have different references. state is a mutable object wrapped in a proxy, whereas snap1 is an immutable object frozen with Object.freeze (https://developer...