`@jest/pattern` is a helper library for the jest library that implements the logic for parsing and matching patterns.

Regular expression for matching astral symbols

Lexer / tokenizer

Measure the difference between two strings using the Levenshtein distance algorithm

Semantic router for AI agents - vector-based intent matching with HNSW indexing and SIMD acceleration

Match a Unicode property or property alias to its canonical property name per the algorithm used for RegExp Unicode property escapes in ECMAScript.

Jelly - call graph and library usage analyzer for JavaScript

Approximate (fast) current UNIX time.

Glob matching for javascript/node.js. A replacement and faster alternative to minimatch and multimatch.

A simple string template function based on named or indexed arguments

High-performance vector database with HNSW indexing - 50k+ inserts/sec, built in Rust for AI/ML similarity search and semantic search applications

Check if a certain debug flag is enabled.

String Tokenization Library for JavaScript

A JS implementation of JSONPath with some additional operators

TypeScript definitions for geoip-lite

Check if a string is a scoped npm package name

Mock http requests made using fetch

A low-level utility for matching a string against a directed acyclic graph of regexes.

Extended glob support for JavaScript. Adds (almost) the expressive power of regular expressions to glob patterns.

A range lets users choose an approximate value on a slider.