Simple and complete React DOM testing utilities that encourage good testing practices.

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

Improved typeof detection for node.js and the browser.

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

Custom jest matchers to test the state of the DOM

The `postinstall` script helper for handling native bindings in legacy `npm` versions

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

Does this JS environment support the `name` property on functions?

A querystring parser that supports nesting and arrays, with a depth limit

Pure random number generator written in TypeScript

Hooks for managing, caching and syncing asynchronous and remote data in React

Simple and complete DOM testing utilities that encourage good testing practices.

A light-weight module that brings Fetch API to node.js

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

Is this value negative zero? === will lie to you

Property based testing framework for JavaScript (like QuickCheck)

Define multiple non-enumerable properties at once. Uses `Object.defineProperty` when available; falls back to standard assignment in older engines.

resolve like require.resolve() on behalf of files asynchronously and synchronously

Returns an array of Typed Array names that are available in the current environment

Determine if a function is a native generator function.