An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.

Tool for transforming styles with JS plugins

Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.

Implementation of Function.prototype.bind

TypeScript Execute (tsx): Node.js enhanced with esbuild to run TypeScript & ESM files

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

resolve like require.resolve() on behalf of files asynchronously and synchronously

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

Freely redistributable faces whose metrics twin the ones documents usually name, for laying out without the real fonts.

An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible

MCP server for Apple iWork automation — 117 tools for Numbers, Pages, and Keynote

A light-weight module that brings Fetch API to node.js

Define multiple non-enumerable properties at once. Uses `Object.defineProperty` when available; falls back to standard assignment in older engines.

Returns an array of Typed Array names that are available in the current environment

Create your next immutable state by mutating the current one

Promise based HTTP client for the browser and node.js

Simple and complete React DOM testing utilities that encourage good testing practices.

This plugin adds `TypeScript` support to `eslint-plugin-import`

A React dev overlay that measures visual gaps and explains the CSS/layout contributions behind them.

Is this specifier a node.js core module?