Using ES7 Decorators as Mixins

In Functional Mixins, we discussed mixing functionality into JavaScript classes, changing the class. We observed that this has pitfalls when applied to a class that might already be in use elsewhere, but is perfectly cromulant when used as a technique to build a class from scratch. When used strictly to build a class, mixins help us decompose classes into smaller entities with focused responsibilities that can be shared between classes as necessary.