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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)
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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

Exploring the module state

The module state is a variable defined at the module level. Module here means an ES module or just a file. For simplicity, we assume that a variable defined outside a function is a module state.

For example, let's define the count state:

let count = 0;

Assuming this is defined in a module, this is a module state.

Typically, with React, we want to have an object state. The following defines an object state with count:

let state = {
  count: 0,
};

More properties can be added to the object. Nesting objects are also possible.

Now, let's define functions to access this module state. getState is a function to read state, and setState is a function to write state:

export const getState = () => state;
export const setState = (nextState) => {
  state = nextState;
};

Notice that we added export to these functions to express that they are expected to be used outside the module.

In React, we often update...

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