jsdom

A JavaScript implementation of various web standards, for use with Node.js

An implementation of the WHATWG URL Standard in JavaScript

A Node.js implementation of the CSS Object Model CSSStyleDeclaration interface

Turn any collection of objects into its own efficient tree or linked list using Symbol

Auto-generate JS class structures for Web IDL specifications

Parses, serializes, manipulates, and sniffs MIME types, according to the WHATWG MIME Sniffing Standard

Perfectly spec-compliant atob and btoa implementations

Parse data: URLs

Make jsdom elements look like real DOM elements in Chrome Devtools console