Redux Introduction in React State Management

What is Redux?

Redux is a predictable state container for JavaScript applications. It helps manage the state of your app in a single place called the store.

By centralizing state, Redux makes it easier to track changes, debug, and share state across components.

• Centralized store holds the entire state of the app.
• State is read-only and can only be changed by dispatching actions.
• Reducers specify how the state changes in response to actions.

Core Concepts of Redux

Redux revolves around three main concepts: actions, reducers, and the store.

• Actions: Plain objects describing what happened, usually with a type property.
• Reducers: Pure functions that take the current state and an action, then return a new state.
• Store: Holds the application state and provides methods to dispatch actions and subscribe to changes.

Setting Up Redux with React

To use Redux in a React app, you need to create a store, define reducers, and connect React components to the store.

The react-redux library provides the Provider component and hooks like useSelector and useDispatch to integrate Redux with React.

• Install redux and react-redux packages.
• Create a Redux store with reducers.
• Wrap your app with the Provider component passing the store.
• Use useSelector to read state and useDispatch to dispatch actions.

Example: Simple Counter with Redux

Let's look at a simple example of a counter app using Redux to manage the count state.