Redux is a popular JavaScript library used for managing application state. It’s an efficient way to store data and keep track of changes in an application.

Redux provides an easy-to-use interface for managing data and keeping track of changes. It’s especially useful for larger applications with complex data structures.

Redux is a great tool for developers, but it can be intimidating at first. To help make the learning curve less steep, here is a list of the most important features and concepts that you should be familiar with when using Redux.

1. Reducers: Reducers are the core of Redux. They are responsible for responding to user actions and updating the application state. Reducers are pure functions, meaning they take in an action and the current state, and return a new state. Reducers are also composable, allowing you to create complex state updates with ease.

2. State: Redux stores all of the application’s state in a single object. This object can be accessed from anywhere in the application. This makes it easy to keep track of changes and maintain consistency.

3. Actions: Actions are the messages that are sent to the reducers to update the application state. Actions are plain JavaScript objects that contain a type field, which tells the reducer what kind of action to take, and a payload field, which contains any necessary data.

4. Middleware: Middleware is a way to extend the Redux store’s functionality. It allows you to intercept actions and modify them before they are sent to the reducers. Middleware can be used to log actions, add custom functionality, or even make asynchronous calls to an API.

5. Store: The store is the object that holds the application’s state. It is created by passing the reducers to the createStore() function. The store is the only source of truth for the application state and can be accessed from anywhere in the application.

6. Selectors: Selectors are functions that allow you to access specific pieces of state from the store. They are used to avoid having to manually traverse the state object when accessing data. Selectors are also composable, making it easy to create complex queries.

With these six features and concepts, you should be well on your way to becoming a Redux master.

If you’re looking for more in-depth information, there are tons of great tutorials and resources online that can help you learn more about Redux. Good luck!