Module for keeping track of chess boards in Forsyth–Edwards Notation.

Parse and stringify FEN (Forsyth–Edwards Notation) chess positions. Strict TypeScript, no-throw API.

chess-fen is a library which includes tools for working with Forsyth–Edwards Notation (FEN) in an immutable manner.

Validate and parse Forsyth-Edwards Notation (FEN) used to describe a chess game board position.

Chess FEN (Forsyth-Edwards Notation) positions analyzer. Having FEN as input helps to identify, e.g. how many pieces left on the board

Chess AI and FFEN (Fairy Forsyth-Edwards Notation) interpreter.

A Node.js command-line tool for validating chess positions and moves using FEN (Forsyth–Edwards Notation) notation.

Use space and slash separated color notation in CSS

TypeScript definitions for he

Big number implementation in pure javascript

An algebraic notation driven chess engine that can validate board position and produce a list of viable moves (notated).

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

Transform objects to MongoDB update instructions

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

very fast object redaction

Create and animate hand-drawn annotations on a web page

Use 4 & 8 character hex color notation in CSS

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