webpack Validation Utils

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

Determine if a value is an ES6 Symbol or not.

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

Fire events the same way the user does

ES6 spec-compliant RegExp.prototype.flags shim.

ES Math-related intrinsics and helpers, robustly cached.

A pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module.

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

Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.

Robustly `.call.bind()` a function

ES2019 spec-compliant String.prototype.trimStart shim.

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

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

Adds CSS selector support to htmlparser for scraping activities - port of soupselect (python)

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

Fast math typesetting for the web.

Is this specifier a node.js core module?

ES spec-like internal slots

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