Ideas of functional programming have been spreading in all areas of software develop for years, and they offer the most important techniques today for a consistent structure in your own projects - other than object oriented programming! Functional techniques are valuable for maintenance, since code is easy to test and to keep current. At the same time this kind of code is highly flexible, since it avoids side effects. In this workshop, Oliver addresses many aspects of using functional approaches in JavaScript. We will begin with basics like closures and higher order functions, then we talk about data modelling, promises and module structure, and we consider practical topics including the use of external libraries like Lodash/FP, Ramda, Sactuary, Fluture and other Fantasy Land compatible implementations. Oliver presents lots of practical examples throughout the day and you will have a chance to follow along and try everything for yourself.