Many of us are really into the paradigms of functional programming. Whether we like streams, mappings, pure functions or just the immutability of variables and objects. In the mean time functional programming is not so rare than it was five years ago! But can you use a modern functional programming language like Clojure for frontend applications? In the web? How does it feel when you write JavaScript with a LISP dialext and which benefits do you have? This talk provides not only a look at a full stack web app completely writen in ClojureScript, but also we will deep dive into the world of lambda expression. I will you how to develop a web app with frameworks in ClojureScript. A live demo and coding will complete our functional lookout.