Redux is one of the most popular libraries used for state management in the frontend ecosystem today. In this chapter, we discussed the need for Redux and the principles that make the library stand out. Moreover, we discussed some of the fundamental concepts of functional programming, and how these concepts are used in the development of the Redux library. We also covered some of the Redux ecosystem and the Redux life cycle, and we created an outline for the project. We implemented the bare minimum version of Redux, extending it to create a larger project.

In the next chapter, you will learn about test-driven development, and we will set up the JEST framework for testing. Moreover, we will continue to use the code that we developed in this chapter in the upcoming chapters.