Class: Error#| nodejs.org
Classes are a template for creating objects. They encapsulate data with code to work on that data. Classes in JS are built on prototypes but also have some syntax and semantics that are unique to classes.| MDN Web Docs
Stability index#| nodejs.org
The Set object lets you store unique values of any type, whether primitive values or object references.| MDN Web Docs
Programming languages all have built-in data structures, but these often differ from one language to another. This article attempts to list the built-in data structures available in JavaScript and what properties they have. These can be used to build other data structures.| MDN Web Docs
The Promise object represents the eventual completion (or failure) of an asynchronous operation and its resulting value.| MDN Web Docs
Process events#| nodejs.org
Test runner#| nodejs.org