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A modern, zero-dependency cache for JavaScript/TypeScript with a pluggable eviction policy: W-TinyLFU admission (Count-Min Sketch + SLRU) that beats plain LRU on skewed workloads. TypeScript-first.

The highest performance constant complexity cache algorithm.

Offers getProxyForUrl to get the proxy URL for a URL, respecting the *_PROXY (e.g. HTTP_PROXY) and NO_PROXY environment variables.

Get East Asian Width from a character.

A tiny library for packing 2D rectangles (for sprite layouts)

A small module to write JSON files.

Protobuf format for Apollo usage reporting

CLI for PostCSS

A plugin that provides a composable API for giving elements a fixed aspect ratio.

Node.js CORS middleware

A list of [disposable email domains](http://en.wikipedia.org/wiki/Disposable_email_address) like `mailinator.com`. You can use it to detect or block disposable accounts in your signup process. Exact domain matches are found in [index.json](https://github.

a geographic extent object

RFC9562 UUIDs

Convert cron expressions into human readable descriptions

High-performance isomorphic in-memory cache for JavaScript/TypeScript, implementing the Window-TinyLFU admission policy. Beats LRU/LFU hit ratios. Zero dependencies. Works in Node, browsers, Deno, Bun, and edge runtimes.

Detect global variables in JavaScript using acorn

Copy file globs, watching for changes.

TypeScript definitions for object-assign

An efficient and visually pleasing implementation of SSAO with an emphasis on temporal stability and artist control.