Library to provide immutable methods (like immutable set similar to lodash's _.set) on standard JS objects
Immutable Data Collections
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Check the immutability of TypeScript types
PropType validators that work with Immutable.js.
redux-immutable is used to create an equivalent function of Redux combineReducers that works with Immutable.js state.
Minimalistic but perfect custom scrollbar plugin
a date and time library for javascript
A bunch of reactive utility types and functions, for building primitives with Solid.js
Draw perfect pressure-sensitive freehand strokes.
Immutable ArrayBuffer (the shim!)
Immutable JSON patch with support for reverting operations
Immutability helpers with fast reads and acceptable writes
React PureComponent implementation embracing Immutable.js
Modify deep object properties without modifying the original object (immutability). Works great with React and Redux.
Serialize unserializable data and parse it back.
Immutable data structures for JavaScript which are backwards-compatible with normal JS Arrays and Objects.
A JavaScript library for efficient immutable updates
[](https://www.npmjs.com/package/ts-data-forge) [](https://www.npmjs.com/package/ts-data-forge) [ provides a comprehensive, JSON-based format for representing complete chess game records across variants. This gem implements the PCN Specification v1.0.0 with a modern Ruby interface featuring immutable game objects and functional programming principles. PCN integrates the Sashité ecosystem specifications (PMN for moves, FEEN for positions, and SNN for style identification) to create a unified, rule-agnostic game recording system. Supports traditional single-variant games and cross-variant scenarios where players use different game systems, with complete metadata tracking including player information, tournament context, and game status. Perfect for game engines, database storage, game analysis tools, and archival systems requiring comprehensive game record management across diverse abstract strategy board games.
STN (State Transition Notation) provides a rule-agnostic format for describing state transitions in abstract strategy board games. This gem implements the STN Specification v1.0.0 with a modern Ruby interface featuring immutable transition objects and functional programming principles. STN captures net changes between game positions by recording modifications in piece locations, hand/reserve contents, and active player status using standardized CELL coordinates and QPI piece identification. Perfect for game engines, position diff tracking, undo/redo systems, and network synchronization requiring efficient state delta representation across multiple game types and traditions.
LCN (Location Condition Notation) provides a rule-agnostic format for describing location conditions in abstract strategy board games. This gem implements the LCN Specification v1.0.0 with a modern Ruby interface featuring immutable condition objects and functional programming principles. LCN enables standardized representation of environmental constraints on board locations using reserved keywords ("empty", "enemy") and QPI piece identifiers with CELL coordinate system integration. Perfect for movement validation, pre-condition checking, constraint evaluation, and rule-agnostic game logic requiring precise location state requirements across multiple game types and traditions.
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