Mapped types are a great way of transforming existing types into new types. In this video tutorial, you will learn how to create mapped types and how to leverage mapped types in your project to transform read-only interfaces into interfaces with optional properties or even how to transform a simple interface into a type that defines getters.
TypeScript keyof explained:
https://www.youtube.com/watch?v=iujvhuaRqOM&t=1s
