Brand checking of React Elements.

babel's modular runtime helpers

Get and robustly cache all JS language-level intrinsics at first require time

Implementation of Function.prototype.bind

HTTP server cookie parsing and serialization

Robustly `.call.bind()` a function

string representations of objects in node and the browser

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

ECMAScript spec abstract operations.

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

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

An Object.keys replacement, in case Object.keys is not available. From https://github.com/es-shims/es5-shim

A library for deep (recursive) merging of Javascript objects

Standard library

Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag

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

ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.

ES2017 spec-compliant Object.values shim.

Object.prototype.hasOwnProperty.call shortcut

Cooperative scheduler for the browser environment.

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

Runtime type checking for React props and similar objects.

React is a JavaScript library for building user interfaces.

Implements performance.now (based on process.hrtime).

ES2015-compliant shim for Object.is - differentiates between -0 and +0

Copies non-react specific statics from a child component to a parent component

A simple utility for conditionally joining classNames together

Parse and stringify URL query strings

ES2017 spec-compliant shim for `Object.getOwnPropertyDescriptors` that works in ES5.

Lodash exported as ES modules.

A lightweight library that provides tools for organizing asynchronous code

Manage session history with JavaScript

requestAnimationFrame polyfill for node and the browser

Delay function calls until a set time elapses after the last invocation

Resolve URL pathnames using JavaScript

Are these two JavaScript values equal?

ECMAScript 2015 (ES6) Object.assign polyfill and ponyfill

Functional programming in TypeScript

Adaptation of react-addons-shallow-compare, for independent usage

Custom React PropType validators that we use at Airbnb.

Manage multiple event handlers using few event listeners

Logger for Redux

Common utilities and types for Chakra UI

Polyfill/shim for `document.contains`

A React component for dealing with clicks outside its subtree

Components to provide and consume RTL or LTR direction in React

React proptype for moment module

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A responsive and accessible date range picker component built with React

Sometimes you have to do horrible things, like use the global object to share a singleton. Abstract that away, with this!

Interface for react-with-styles outputting CSS

React Hook for managing state in URL query parameters with easy serialization.