In this talk we will explore the application of functional programming principles in order to give more structure to a modern React application. Thanks to functional programming, we will be able to build a structured interface for the definition, reuse, and composition of components. Basic knowledge of React, TypeScript, and anonymous functions (lambdas) will help but is not strictly required. A bit of knowledge of category theory or Haskell is definitely not required but if you have it it will make the talk more fun to listen to!