A development middleware for webpack

Serves a webpack app. Updates the browser on changes.

Vitest module mocker implementation

Minimal H(TTP) framework built for high performance and portability.

Fork of pretty-format with support for ESM

Cross-platform WebSocket Servers for Node.js, Deno, Bun and Cloudflare Workers

Development server for Rspack

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

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

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

ES2019 spec-compliant String.prototype.trimStart shim.

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

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

Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.

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

Minimizer plugin for webpack

Implementation of Function.prototype.bind

Robust call-bound JavaScript intrinsics, using `call-bind` and `get-intrinsic`.

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

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