The Complete React Developer Course (with Hooks and Redux) - Reducers

The video tutorial covers the transition from a simple example to setting up a Redux store for the Expensify application. It explains the concept of reducers, emphasizing their role as pure functions that determine state changes based on actions. The tutorial highlights the importance of not mutating state or action directly. It also introduces the setup of a Redux store for a more complex application, demonstrating how to manage multiple reducers and track various data points like expenses and filters.

What is the primary role of a reducer in Redux?

Explain the concept of pure functions in the context of reducers.

What are the two main rules that reducers must follow?

How should state and action be treated within a reducer?

How does the use of combine reducers benefit a Redux application?

Describe the structure of the demo state for the Expensify application.

What is the significance of tracking expenses in the Expensify application?

What types of filters will be implemented in the Redux store for the Expensify app?

In what ways can users filter their expenses in the application?

What is the expected output of a reducer function?