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

Exploring useState and useContext

By combining useState and useContext, we can create a simple global state. Let's recap on how to use useState without useContext, how useContext works for static values, and how we combine useState and useContext.

Using useState without useContext

Before diving into useContext, let's be reminded of how to useState, with a concrete example. This example is going to be a reference for the following examples in the chapter.

Here, we define a count state with useState higher in the component tree and pass the state value and the update function down the tree.

In the App component, we use useState and get count and setCount, which are passed to the Parent component. The code is illustrated in the following snippet:

const App = () => {
  const [count, setCount] = useState(0);
  return <Parent count={count} setCount={setCount} />;

This is a very basic pattern, which we know as lifting the state up...