npm

webidl-conversions

Implements the WebIDL algorithms for converting to and from JavaScript values

xml-name-validator

Validates whether a string matches the production for an XML name or qualified name

jsdom

A JavaScript implementation of many web standards

whatwg-url

An implementation of the WHATWG URL Standard's URL API and parsing machinery

tr46

An implementation of the Unicode UTS #46: Unicode IDNA Compatibility Processing

webidl2js

Auto-generates class structures for WebIDL specifications

whatwg-encoding

Decode strings according to the WHATWG Encoding Standard

html-encoding-sniffer

Sniff the encoding from a HTML byte stream

domexception

An implementation of the DOMException class from browsers

css-object-model

An implementation of the CSSOM specification

whatwg-mimetype

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

w3c-hr-time

An implementation of the W3C High Resolution Time Level 2 specification.

data-urls

Parses data: URLs

w3c-xmlserializer

A per-spec XML serializer implementation