State Management Library For React

State Management Library For React JS: React is an open-source JavaScript library created by Facebook. React is used to create the interface, particularly single-page applications. React uses the concept of reusable UI components, and these components are the building blocks of a React application. Every component has its own state. To manage the state of the application, we have different libraries like Redux, Jotai, and many more.

Every state management library has pros and cons. To choose the best state management library for React applications depends on the complexity of your application and how big your project is.

In this blog, I want to walk you through the most popular state management libraries available for React. We’ll discuss their strengths and weaknesses, and by the end of this article, I hope you should be well equipped to choose the right state management library for your project.

1) Redux

 Redux is a predictable state container for JavaScript applications. It helps you to manage your application’s state in a single place, so it is easier to reason about, debug and maintain it. Quite often, Redux is used with React, but it can work with any JavaScript framework or even vanilla JavaScript.

Redux Core Concepts:

1. Store: Store is an immutable object. It is a single source of truth for your application’s state. The store holds the entire state of the application and is the only place to access and change the state.

Example of a State Object:

{
  "users": [
    {
      "id": 1,
      "name": "Alice",
      "age": 28
    }
  ]
}

1. Action: Action is also a JavaScript object. It describes something that happened in the app, like data being loaded from an API, a user clicking a button, or a user logging in or logging out. The state of the app in Redux can only be changed by emitting an action. Action Object has two properties.
   • Type: This is a required field. It describes the specific event or action that occurred. The type helps reducers determine what kind of state updates are needed. Type are usually a string (e.g., “ADD_TODO”, “FETCH_DATA_SUCCESS”)
   • Payload: This is an optional field. It contains any extra data that the action needs to carry, such as user input, API responses, or other information necessary to update the state. For example, if the action is about adding a new item to a list, the payload could contain the item details, and if you want to add a new user, the payload might be the user’s details like name, age, etc.

Example of an Action Object:

{
  type: 'ADD_TODO',
  payload: {
    id: 1,
    text: 'Learn React State Management',
    completed: false
  }
}

{
  "action": "ADD_USER",
  "payload": {
    "name": "John Doe",
    "age": 30,
    "email": "johndoe@example.com",
    "address": {
      "street": "123 Main St",
      "city": "New York",
      "state": "NY",
      "zip": "10001"
    },
    "phone": "555-1234"
  }
}

Pros: Predictability, large ecosystem, dev tools, quite popular.

Cons: Boilerplate code, steeper learning curve.

2) Jotai

3) Zustland

4) Mobx

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