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 React Redux

The primary use case of React Tracked is to replace a use case of React Context. This is done by using use-context-selector internally.

React Tracked exposes a low-level function called createTrackedSelector to cover non-React Context use cases. It takes a hook called useSelector and returns a hook called useTrackedState:

const useTrackedState = createTrackedSelector(useSelector);

useSelector is a hook that takes a selector function and returns the result of the selector function. It will trigger re-renders when the result changes. useTrackedState is a hook that returns an entire state wrapped in proxies to track the state usage.

Let's look at a concrete example with React Redux. This provides a useSelector hook, and it's straightforward to apply createTrackedSelector.

Important Note about React Redux

React Redux uses React Context internally, but it doesn't use Context for propagating a state value. It uses React...