Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.
ES2017 spec-compliant Object.values shim.
TypeScript-first schema declaration and validation library with static type inference
Improved typeof detection for node.js and the browser.
ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.
Is this value negative zero? === will lie to you
Simple and complete React DOM testing utilities that encourage good testing practices.
An ESnext spec-compliant `Array.prototype.findLast` shim/polyfill/replacement that works as far down as ES3.
Helper functions for V8 coverage files.
Pure random number generator written in TypeScript
ECMAScript spec-compliant polyfill/shim for `globalThis`
Unbox a boxed JS primitive value.
An ESnext spec-compliant `Array.prototype.findLastIndex` shim/polyfill/replacement that works as far down as ES3.
Determine if a value is an ES6 Symbol or not.
ES2017 spec-compliant Object.entries shim.
Helper package to shim a method into `Array.prototype[Symbol.unscopables]`
Is this value a JS Date object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
ES proposal-spec-compliant Object.fromEntries shim.
Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js
Property based testing framework for JavaScript (like QuickCheck)
Is this value a JS String object or primitive? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
This plugin adds `TypeScript` support to `eslint-plugin-import`
A collection of essential TypeScript types