Redux?is a library used in JavaScript applications for managing application states. It is particularly popular when building single-page applications using frameworks like?React. Redux is essential for the following reasons below:
- Centralized State Management: When building complex web applications with various components (such as user authentication, shopping carts, product cards, etc.), each component has its data or “state.” Managing this data individually can become messy and challenging. Redux provides a?centralized store?where all application data exists. Instead of scattering data across different parts of the app, Redux keeps it all in one place.
- Predictable Behaviour: Redux ensures a?strict unidirectional flow?of data. By maintaining the entire application state in a single store, it becomes easier to track how data changes over time. This predictability reduces complexity and improves scalability, especially for large-scale applications.
- Flow of Redux State Management: State Initialization: Define an initial state for the application (e.g., user authentication state, data fetched from APIs, UI-related content state). Dispatching Actions: When an event occurs (e.g., the user clicks a button, data is received from an API), dispatch an action. An action describes what happened and includes a “type” property. Reducers Process Actions: Reducers are pure functions that take the current state and the action as input. They return to a new state based on the action. Reducers specify how the state should change. State Update: The Redux store calls the root reducer, passing the current state and the action.
