Curated collection of data structures for the JavaScript/TypeScript.

Nexus serializer — lossless transport of Date, Map, Set, BigInt, RegExp, URL between server and client

Serialize/deserialize json with support for Map, Set & Date

Automatically cleanup expired items in a Map

Parses set-cookie headers into objects

HashMap, LinkedHashMap and Higher Order Functions for all other Iterables, such as Map, Set and Array

Map `visit` over an array of objects.

concatenative mapdashery

Is this value a JS Map? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

Deep clone and/or serialize almost any JavaScript object tree (Map/Set, RegExp, DataView, etc.) while preserving circular references.

A skip list implementation inspired by the Sorted Set in Redis.

An ultra light-weight, nonexhaustive, polyfills library

A powerful JSON enhancement library that supports all JSON primitives, Date, RegExp, Symbol, Functions, Map, Set, TypedArray and much more! Almost everything in JavaScript.

Converts a source-map from/to different formats and allows adding/changing properties.

A `Map` subclass with support for multiple keys for one entry.

High Performance In-Memory Cache for Node.js

Persistent ordered mapping from strings

Helper for working with data structures as Map, Set and Object in JavaScript

Map, Set, and Object subclasses that efficiently maintain a sorted iteration order.

A JavaScript (JS) Map or Similar object polyfill if Map is not available.