Curated collection of data structures for the JavaScript/TypeScript.

Bitfield that allocates a series of small buffers to support sparse bits without allocating a massive buffer

Sparse array with run-length encoded deletions

A sparse array optimised for low memory whilst still being fast

Some git helpers that changesets use to get information

Generates and consumes source maps

Sparse array implementation in JS with no dependencies

Generates and consumes source maps

Sparse Merkle tree implementation in TypeScript.

Fixes stack traces for files with source maps

Store information about any JS value in a side channel, using a Map

concatenative mapdashery

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

Fixes stack traces for files with source maps

`jest-haste-map` is a module used by Jest, a popular JavaScript testing framework, to create a fast lookup of files in a project. It helps Jest efficiently locate and track changes in files during testing, making it particularly useful for large projects

msgpack encoder and decoder in pure javascript based on creationix/msgpack-js updated to match the new v5 specification with string support.

Parser/writer for the Intel HEX format

Persistent ordered mapping from strings

ES Map/Set-compatible implementations with customizable equality semantics & supporting operations

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