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

Chapter 9: Use Case Scenario 3 – Valtio

Valtio ( is yet another library for global state. Unlike Zustand and Jotai, it's based on the mutating update model. It's primarily for module states like Zustand. It utilizes proxies to get an immutable snapshot, which is required to integrate with React.

The API is just JavaScript and everything works behind the scenes. It also leverages proxies to automatically optimize re-renders. It doesn't require a selector to control re-renders. The automatic render optimization is based on a technique called state usage tracking. Using state usage tracking, it can detect which part of the state is used, and it can let a component re-render only if the used part of the state is changed. In the end, developers need to write less code.

In this chapter, we will learn about the basic usage of the Valtio library and how it deals with mutating updates. Snapshots are a key feature to create an immutable...