Define multiple non-enumerable properties at once. Uses `Object.defineProperty` when available; falls back to standard assignment in older engines.
Determine if a function is a native generator function.
Returns an array of Typed Array names that are available in the current environment
Custom jest matchers to test the state of the DOM
ES6 spec-compliant Object.assign shim. From https://github.com/es-shims/es6-shim
Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.
Is this value a JS Number object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. It's written in JavaScript and works in all modern browsers (Safari, Opera (15+), Internet Explorer (10+), Firefox and Chrome - as well as almost anything else usin
Robustly `.call.bind()` a function
The `postinstall` script helper for handling native bindings in legacy `npm` versions
ES spec-like internal slots
An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible
An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.
Does this JS environment support the `name` property on functions?
Gets the description of a Symbol. Handles `Symbol()` vs `Symbol('')` properly when possible.
Fast, disk space efficient package manager
Simple and complete DOM testing utilities that encourage good testing practices.
An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.
ES Math-related intrinsics and helpers, robustly cached.
A library for obtaining browser versions with their maximum supported Baseline feature set and Widely Available status.
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
An ESnext spec-compliant `Array.prototype.findLast` shim/polyfill/replacement that works as far down as ES3.
ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.
TypeScript-first schema declaration and validation library with static type inference