Is this value a JS FinalizationRegistry? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Returns an array of Typed Array names that are available in the current environment
Determine if a function is a native generator function.
Define multiple non-enumerable properties at once. Uses `Object.defineProperty` when available; falls back to standard assignment in older engines.
ES6 spec-compliant Object.assign shim. From https://github.com/es-shims/es6-shim
Does this JS environment support the `name` property on functions?
Custom jest matchers to test the state of the DOM
Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.
The `postinstall` script helper for handling native bindings in legacy `npm` versions
ES spec-like internal slots
Is this value a JS Number object? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Which kind of Collection (Map, Set, WeakMap, WeakSet) is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.toStringTag.
Robustly `.call.bind()` a function
Encode FormData content into the multipart/form-data format
An ES2019 spec-compliant `Array.prototype.flat` shim/polyfill/replacement that works as far down as ES3.
Gets the description of a Symbol. Handles `Symbol()` vs `Symbol('')` properly when possible.
An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible
Simple and complete DOM testing utilities that encourage good testing practices.
ES Math-related intrinsics and helpers, robustly cached.
Fast, disk space efficient package manager
Improved typeof detection for node.js and the browser.
An ES7/ES2016 spec-compliant `Array.prototype.includes` shim/polyfill/replacement that works as far down as ES3.
Simple and complete React DOM testing utilities that encourage good testing practices.
ES2017 spec-compliant Object.values shim.