Brand checking of React Elements.

Stringify any JavaScript value.

Runtime for Regenerator-compiled generator and async functions.

babel's modular runtime helpers

Standard library

A library for deep (recursive) merging of Javascript objects

Runtime type checking for React props and similar objects.

Cooperative scheduler for the browser environment.

React is a JavaScript library for building user interfaces.

React package for working with the DOM.

emotion's memoize utility

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

invariant

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

A MurmurHash2 implementation

A function to check whether a prop is valid for HTML and SVG elements

internal utils for emotion

serialization utils for emotion

emotion's cache

emotion's stylesheet

A Light–weight CSS Preprocessor

Declarative routing for React

Core Storybook Components

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

> Simple styling in React.

A lightweight toolset for writing styles in Javascript.

The lodash method `_.kebabCase` exported as a module.

styled API for emotion

React context for MDX

Utility functions for React components.

Tiny 200b functional Event Emitter / pubsub.

A document head manager for React

Create components whose prop changes map to a global side effect

Responsive, theme-based style props for building design systems with React

Styled System for the `css` prop

Read the docs: https://styled-system.com/variants

React code splitting made easy.

Polyfills for legacy browsers

Blazing fast modern site generator for React

Gatsby library that helps creating pages

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

Relocate resource intensive third-party scripts off of the main thread and into a web worker.

Gatsby's fork to modernize reach-router

An enhanced script component for Gatsby sites with support for various loading strategies

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

Utility for filtering Styled System props with Emotion's shouldForwardProp option

[](https://bundlephobia.com/package/@theme-ui/css)

Primitive layout, typographic, and other components for use with Theme UI.

[](https://bundlephobia.com/package/@theme-ui/core)

Adds support for user-controlled color modes

**Note:** This package is a hack to fix export order produced by microbundle. Use the main `theme-ui` package or `@theme-ui/core` instead.

[MDX](https://mdxjs.com) utilities for [Theme UI](https://theme-ui.com)

MDX integration for Gatsby

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

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.

Internal package — You don't want to consume this directly.