ECMAScript extensions and shims

Runtime library for TypeScript helper functions

RFC4122 (v1, v4, and v5) UUIDs

Array#isArray for older browsers

Brand checking of React Elements.

Node.js Buffer API, for the browser

babel's modular runtime helpers

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

Implementation of Function.prototype.bind

Express style path to RegExp utility

Promise based HTTP client for the browser and node.js

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.

Store information about any JS value in a side channel. Uses WeakMap if available.

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

ECMAScript spec abstract operations.

Base64 encoding/decoding in pure JS

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.

ES6 spec-compliant Object.assign shim. From https://github.com/es-shims/es6-shim

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

ES6 spec-compliant RegExp.prototype.flags shim.

A library for deep (recursive) merging of Javascript objects

Standard library

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.

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

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

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

The Lodash method `_.merge` exported as a module.

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

Determine if the JS environment has BigInt support.

A better forEach

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

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

Which kind of boxed JS primitive is this?

Cooperative scheduler for the browser environment.

Object.prototype.hasOwnProperty.call shortcut

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.

node's assert.deepEqual algorithm

Immutable Data Collections

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

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

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

Really Fast Deep Clone

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

An object of css properties that don't accept values with units

A simple utility for conditionally joining classNames together

Parse and stringify URL query strings

Get an iterator for any JS language value. Works robustly across all environments, all versions.

A window.fetch polyfill.

Create your next immutable state by mutating the current one

A tiny invariant function

Predictable state container for JavaScript apps

Declarative routing for React web applications

Fastest deep equal comparison for React. Great for React.memo & shouldComponentUpdate. Also really fast general-purpose deep comparison.

implementation of crypto for the browser

A simple, lightweight JavaScript API for handling cookies

Selectors for Redux.

Like lodash isEqualWith but for shallow equal.

Manage session history with JavaScript

Thunk middleware for Redux.

A custom build of Stylis

Easily measure performance metrics in JavaScript

Create components whose prop changes map to a global side effect

A document head manager for React

The Cloud Firestore component of the Firebase JS SDK.

Universal cookies for JavaScript

Redux-saga internal symbol "registry".

Runtime type checking helpers

Tweak React components in real time.

Universal cookies for React

Asyncronous JavaScript loader and dependency manager

React code splitting made easy.

Static route config matching for React Router

A higher order component for loading components with promises

Compiles a function to compute the plural forms index for a given value

A library to edit lottie-web animations dynamically

Polyfill Web Speech API with Cognitive Services Speech-to-Text service