React interview questions in Hindi #16 What is redux
1The basic idea of redux is that the entire application state is kept in a single store. The store is simply a javascript object.
The only way to change the state is by sending actions from your application and then writing reducers for these actions that modify the state.
The entire state transition is kept inside reducers and should not have any side-effects.
Redux is a state management library for JavaScript applications, particularly those built using frameworks like React. It provides a predictable way to manage the state of your application and helps maintain a consistent and centralized data store that can be accessed and modified from different parts of your application.
Redux follows the principles of a unidirectional data flow and immutability, which helps to avoid common state-related issues in larger and more complex applications. It's especially useful when your application's state becomes challenging to manage through simple React component state or when you need to share state between components that are not directly connected in the component tree.
The core concepts of Redux are as follows:
Store: The central data store holds the entire application's state. It's a plain JavaScript object that can only be modified by dispatching actions.
Action: An action is a plain JavaScript object that describes an event that occurred in the application. It must have a type property that indicates the type of action being performed, and it can optionally carry additional data or payloads.
Reducer: A reducer is a pure function that takes the current state and an action as inputs and returns a new state. It specifies how the state should be updated in response to actions. Reducers are combined to form the overall state tree.
Dispatch: Dispatching an action is the process of sending an action to the store. The store then passes the action to the appropriate reducer(s), which update the state accordingly.
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