Brand checking of React Elements.

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

babel's modular runtime helpers

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

Implementation of Function.prototype.bind

Robustly `.call.bind()` a function

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.

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

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

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.

process information for node.js and browsers

React package for working with the DOM.

Determine if a function is a native generator function.

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

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

invariant

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

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

Emulate console for all the browsers

Manage session history with JavaScript

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

Tiny 200b functional Event Emitter / pubsub.

Check if something is a promise

Formats ICU Message strings with number, date, plural, and select placeholders to create localized messages.

foreach component + npm package

ECMAScript 2015 (ES6) Object.assign polyfill and ponyfill

Typescript-compatible minimalistic shallow equality check for arrays/objects

Create components whose prop changes map to a global side effect

A document head manager for React

Internationalize React apps. This library provides React components and an API to format dates, numbers, and strings, including pluralization and handling translations.

Parses ICU Message strings into an AST via JavaScript.

Array#filter for older browsers.

A memoizer factory for Intl format constructors.

Blazing fast modern site generator for React

Polyfills for legacy browsers

Smartly determine best unit for relative time format

An enhanced Link component for Gatsby sites with support for resource prefetching

React Router scroll management forked from https://github.com/ytase/react-router-scroll for Gatsby

Stand alone shallowCompare for use in libraries that support shouldComponentUpdate

Gatsby's fork to modernize reach-router

Gatsby plugin which adds a manifest.webmanifest to make sites progressive web apps

Intercepts local links from markdown and other non-react pages and does a client-side pushState to avoid the browser having to refresh the page.

Processes images in markdown so they can be used in the production build.

Gatsby plugin to autolink headers in markdown processed by Remark

A library to edit lottie-web animations dynamically