Utility for modifying / processing the contents of Javascript objects or arrays via object notation strings or globs.

lichess.org chess ui

Format numbers for human consumption.

Token-Oriented Object Notation (TOON) – compact, human-readable serialization of JSON data for LLM prompts

Create and animate hand-drawn annotations on a web page

Use hwb() color functions in CSS

Euchre Game Notation (EGN) file format specification, JSON schemas, and TypeScript utilities.

Simple and fast Node.js chess engine with configurable AI and no dependencies

very fast object redaction

Chess UI components for React Native and React Native Web apps built on ZORA.

Create and animate hand-drawn annotations on a web page

Rough annotation primitives for Remotion

a CSS selector compiler/engine

asn1js is a pure JavaScript library implementing this standard. ASN.1 is the basis of all X.509 related data structures and numerous other protocols used on the web

A function to parse floating point hexadecimal strings as defined by the WebAssembly specification

Parse musical notes in abc notation

Use 4 & 8 character hex color notation in CSS

micromark extension for dollar (`$C_L$`) and TeX-style (`\(C_L\)`, `\[C_L\]`) math delimiters

Underscore mixins for deeply nested objects

cjson - Commented JavaScript Object Notation. It is a json loader, which parses only valid json files, but with comments enabled. Useful for loading configs.