In this talk we'll take a look at some advanced features in the JavaScript language, specifically features which have to do with objects and their properties. First we'll cover Property Descriptors which includes such descriptors as Enumerable, Configurable, and Writable. Under this same umbrella are Getter and Setter descriptors which trigger function calls. Finally we'll look at Proxies and their Traps, which are functions that are called when an object is used in a particular way (such as For/Of loops or reading the objects keys).