Understanding Redux and Its Role in React

What Is Redux?

Redux is a predictable state management library often used with JavaScript applications, including React. It helps manage the state of an application by providing a centralized store where all application state resides. Redux is particularly beneficial for managing complex state logic or state that needs to be shared across multiple components.

Although Redux can be used with any JavaScript framework or library, it is most commonly associated with React due to their complementary nature.

Core Concepts of Redux

1. Store:

• The single source of truth for your application state.
• All state is stored in an immutable object tree.

2. Actions:

• Plain JavaScript objects that describe what happened.
• They must have a type property, which identifies the action.

Example:

const incrementAction = { type: 'INCREMENT' };

3. Reducers:

• Pure functions that specify how the application’s state should change in response to an action.
• They take the current state and an action as arguments and return the new state.