BDD/TDD assertion library for node.js and the browser. Test framework agnostic.

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

Detect Browser, Engine, OS, CPU, and Device type/model from User-Agent & Client Hints data. Supports browser & node.js environment

style loader module for webpack

Next-generation ES module bundler

Perform async work synchronously in Node.js using `worker_threads` with first-class TypeScript support.

Get and robustly cache all JS language-level intrinsics at first require time

Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.

Determine if the JS environment has Symbol support. Supports spec, or shams.

Various operations on Uint8Array data

Helper functions around Function call/apply/bind, for use in `call-bind`

TypeScript scope analyser for ESLint

🐻 Bear necessities for state management in React

Pure random number generator written in TypeScript

A querystring parser that supports nesting and arrays, with a depth limit

DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. It runs as JavaScript and works in all modern browsers, as well as in Node.js (via jsdom). DOMPurify is written by security people who have vast background in web a

Utilities for working with TypeScript + ESLint together

Determine if the current node version supports the `--preserve-symlinks` flag.

The `postinstall` script helper for handling native bindings in legacy `npm` versions

Fill in a range of numbers or letters, optionally passing an increment or `step` to use, or create a regex-compatible range with `options.toRegex`