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Key Points:
Practical Solution:
Architecture:
Detailed Explanation:
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Overview:
Single Source of Truth: Redux centralizes all application data (state) in a single, immutable object, making state management predictable and testable. This central state is like a client-side database.
What is State?? : In frameworks like React, state refers to an object that holds dynamic data or variables that can change over time. This data is used to control the behavior and rendering of components in the user interface (UI).
Modern Web Applications: Web apps are complex trees of components that produce and share data (state). When state is decentralized across components, it becomes challenging to manage and test.
Redux Purpose: Redux is a pattern and a library that helps manage complex state at scale, especially in React applications. It was created by Dan Abramov and Andrew Clark at Facebook.
Core Concepts:
Immutability: The Redux store is immutable. To change the state, an entirely new object is created.
Actions: To change the state, an action is dispatched. Actions have a name (like an event) and a payload (the data to change).
Reducers: A reducer is a function that takes the current state and an action payload and returns a new state object. This is how state transitions occur in Redux.
One-Way Data Flow: Redux enforces a unidirectional data flow, ensuring that state changes are predictable and can be easily tested.
Benefits:
Dev Tools: Redux opens the door to advanced developer tools like Redux DevTools, which allow developers to inspect, time-travel, and debug the entire state of the application.
Global Store: Redux uses a global store that is accessible throughout the application, eliminating the need for prop drilling or context in most cases.
Redux Toolkit:
Setting Up:
configureStore to set up the global store and register reducers.Provider: Wrap the application with Provider to make the store accessible to the entire component tree.
Slices:
Hooks:
Usage Example:
useSelector to access the state and useDispatch to modify it.DevTools:
Conclusion: