TypeScript is a powerful language that allows you to express types in terms of other types. Types are not just annotations for variables, but also operators that can manipulate and transform existing types. In this talk, you will learn what types represent in TypeScript, how basic set operations like union and intersection apply to them, and how to use them to your advantage through some practical examples. By the end of this talk, you will have a deeper understanding of TypeScript’s type system and how to leverage it for more robust and expressive code.