Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Save more on your purchases now! discount-offer-chevron-icon
Savings automatically calculated. No voucher code required.
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Micro State Management with React Hooks

You're reading from   Micro State Management with React Hooks Explore custom hooks libraries like Zustand, Jotai, and Valtio to manage global states

Arrow left icon
Product type Paperback
Published in Feb 2022
Publisher Packt
ISBN-13 9781801812375
Length 254 pages
Edition 1st Edition
Languages
Tools
Arrow right icon
Author (1):
Arrow left icon
Daishi Kato Daishi Kato
Author Profile Icon Daishi Kato
Daishi Kato
Arrow right icon
View More author details
Toc

Table of Contents (16) Chapters Close

Preface 1. Part 1: React Hooks and Micro State Management
2. Chapter 1: What Is Micro State Management with React Hooks? FREE CHAPTER 3. Part 2: Basic Approaches to the Global State
4. Chapter 2: Using Local and Global States 5. Chapter 3: Sharing Component State with Context 6. Chapter 4: Sharing Module State with Subscription 7. Chapter 5: Sharing Component State with Context and Subscription 8. Part 3: Library Implementations and Their Uses
9. Chapter 6: Introducing Global State Libraries 10. Chapter 7: Use Case Scenario 1 – Zustand 11. Chapter 8: Use Case Scenario 2 – Jotai 12. Chapter 9: Use Case Scenario 3 – Valtio 13. Chapter 10: Use Case Scenario 4 – React Tracked 14. Chapter 11: Similarities and Differences between Three Global State Libraries 15. Other Books You May Enjoy

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>();
  ...
lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime