Immutable data cannot be changed once created, leading to much simpler application development, no defensive copying, and enabling advanced memoization and change detection techniques with simple logic. Persistent data presents a mutative API which does not update the data in-place, but instead always yields new updated data.

Shared data types for building collaborative software

Data Structures and Algorithms explained and implemented in JavaScript

A JSON-like data structure that can be modified concurrently by different users, and merged again automatically.

Immutable data structures for JavaScript which are backwards-compatible with normal JS Arrays and Objects.

high performance, intuitive, and easy to use data structures for manipulating and processing structured data.

Curated collection of data structures for the JavaScript language

Implementations of common data structures with idiomatic interfaces

Efficient immutable updates, 10x faster than Immer by default, even faster than naive handcrafted reducer.

A robust & multipurpose Graph object for JavaScript & TypeScript.

An immutable list with unmatched performance and a comprehensive functional API.

A library for creating byte level data structures.

A tree data structure that emits events on updates, even if the modification is triggered by one of the leaves, making it easier to think in a reactive way.

Reactive micro-modular ui framework. Very simple, but very powerful!

The fastest JavaScript priority queue out there. Zero dependencies.

Data structures for high-performance JavaScript applications

The C# Language Integrated Queries ported for Javascript for amazing performance

A JS library written in TS to transform sequences of data from format to another

A very fast and lightweight Typescript library to create immutable states with a mutable syntax

TypeScript & Javascript Data Structures

An isomorphic and configurable javascript utility for objects deep cloning

Walk any kind of tree structure depth- or breadth-first

Delta based CRDT with additional abilities