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Micro State Management with React Hooks

Micro State Management with React Hooks

By : Daishi Kato
4.9 (10)
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Micro State Management with React Hooks

Micro State Management with React Hooks

4.9 (10)
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)
close
1
Part 1: React Hooks and Micro State Management
3
Part 2: Basic Approaches to the Global State
8
Part 3: Library Implementations and Their Uses

Implementing the Context and Subscription pattern

As we learned, using one Context to propagate a global state value has a limitation: it causes extra re-renders.

Module state with Subscription doesn't have such a limitation, but there is another: it only provides a single value for the entire component tree.

We would like to combine Context and Subscription to overcome both limitations. Let's implement this feature. We'll start with createStore. This is exactly the same implementation we developed in Chapter 4, Sharing Module State with Subscription:

type Store<T> = {
  getState: () => T;
  setState: (action: T | ((prev: T) => T)) => void;
  subscribe: (callback: () => void) => () => void;
};
 
const createStore = <T extends unknown>(
  initialState: T
): Store<T> => {
  let state = initialState;
  const callbacks = new Set<() => void>();
  ...

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