An HTML5 video player that supports HLS and DASH with a common API and skin.

RFC4122 (v1, v4, and v5) UUIDs

Browser-friendly inheritance fully compatible with standard node.js inherits()

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

Implementation of Function.prototype.bind

Express style path to RegExp utility

HTTP server cookie parsing and serialization

Robustly `.call.bind()` a function

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

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

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.

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

Which kind of Typed Array is this JavaScript value? Works cross-realm, without `instanceof`, and despite Symbol.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

Is this value a JS Typed Array? This module works cross-realm/iframe, does not depend on `instanceof` or mutable properties, and despite ES6 Symbol.toStringTag.

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

Node.js's util module for all engines

A better forEach

Object.prototype.hasOwnProperty.call shortcut

Cooperative scheduler for the browser environment.

Runtime type checking for React props and similar objects.

Is this an arguments object? It's a harder question than you think.

React is a JavaScript library for building user interfaces.

Determine if a function is a native generator function.

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

Node's querystring module for all engines.

A simple utility for conditionally joining classNames together

The assert module from Node.js, for the browser.

Core Storybook Components

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

ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.

Check if something is a promise

Performant, flexible and extensible forms library for React Hooks

Parses set-cookie headers into objects

Easily measure performance metrics in JavaScript

ECMAScript 2015 (ES6) Object.assign polyfill and ponyfill

Spectrum UI components in React

A simple base class for creating fast, lightweight web components

The Cloud Firestore component of the Firebase JS SDK.

Finite State Machines and Statecharts for the Modern Web.

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

Reusable hooks

Enables body scroll locking (for iOS Mobile and Tablet, Android, desktop Safari/Chrome/Firefox) without breaking scrolling of a target element (eg. modal/lightbox/flyouts/nav-menus)

Auth0 SDK for Single Page Applications using Authorization Code Grant Flow with PKCE

A responsive and accessible date range picker component built with React

React scrollbars component

Adaptive Cards Javascript library for HTML Clients

React SDK for Optimizely Feature Experimentation, Optimizely Full Stack (legacy), and Optimizely Rollouts

Javascript module template.

A tiny cookie manipulation plugin

React Component for displaying an image from Imgix