Pipelines are a declarative pattern of programming where data is passed (or "piped") through a series of simple functions. There are numerous ways to go about it. Function composition, chaining, pipes, Promises, mapping, the pipe operator, and so many others. Pipelines allow us to define the complex in a simple way. We are going to explore what pipelines are, why they are useful, what are the mechanisms we can use in JavaScript to accomplish them and what to watch out for. We will be discussing this pattern in a way that is accessible to any level of programmer. It will be interactive and cover both practical application and theory.