In this chapter, we developed a simple online classroom application called MERN Classroom, by extending the skeleton application. We incorporated functionality that allowed users to have multiple roles, including educator and student; to add and publish courses with lessons as an instructor; to enroll on courses and complete lessons as a student; and to keep track of course completion progress and enrollment statistics.
While implementing these features, we practiced how to extend the full-stack component slices that make up the frontend–backend-synced application. We added new features by simply implementing data schemas and models, adding new backend APIs, and integrating these with new React components in the frontend to complete the full-stack slice. By building this application up gradually from smaller units of implementation to complex and combined features...