Elm has enabled functional programming in front-end web development. It is a user-friendly and easily accessible programming language that compiles to JavaScript and runs in the browser. This course is a practical introduction to Elm as a functional programming language for developing real-world applications. Instructor Eduard Kyvenko reviews core concepts, such as persistent data types and data structures, side effects, and state management. Then he shows how to build a web application exemplifying all the core principles of web development with a purely functional language. Eduard closes with an exploration of Elm development tools, packages, and testing strategies, and some tips for messaging and optimized rendering with Elm.