Decorators are not part of the ECMAScript 6 specification, but they were proposed to the ECMAScript 7 standard for 2016. They provide us with a way to decorate classes and properties during design time. This allows a developer to use meta-annotations while writing classes, and declaratively attach functionality to the class and its properties.
Decorators are named after the decorator pattern that was initially described in the book Design Patterns: Elements of Reusable Object-Oriented Software, by Erich Gamma and his colleagues, also known as the Gang of Four (GoF).
The principle of decoration is that an existing procedure is intercepted and the decorator has the chance to either delegate, provide an alternative procedure, or do ...
