TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

JavaScript API for Chrome and Firefox

Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation

A JS library for predictable global state management

The repository for high quality TypeScript type definitions.

The HTML5 Creation Engine: Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.

Delightful JavaScript Testing.

A terminal built on web technologies

🐠 Babel is a compiler for writing next generation JavaScript.

Visual primitives for the component age. Use the best bits of ES6 and CSS to style your apps without stress 💅

Lerna is a fast, modern build system for managing and publishing multiple JavaScript/TypeScript packages from the same repository.

Immutable persistent data collections for Javascript which increase efficiency and simplicity.

The open source frontend for GitBook doc sites

Dead simple Object schema validation

A terminal emulator for the 21st century.

Thunk middleware for Redux

Sass makes CSS fun!

🥊 Tiny 200 byte functional event emitter / pubsub.

Isolated React component development environment with a living style guide

Asynchronous HTTP microservices

A functional and reactive JavaScript framework for predictable code

Documentation generator for TypeScript projects.

Remove unused CSS

A tiny wrapper built around fetch with an intuitive syntax. 🍬

Code ➡️ `prettier` ➡️ `eslint --fix` ➡️ Formatted Code ✨

Import Map Package Manager

The Chrome DevTools UI

The BBC's Open Source Web Application. Contributions welcome! Used on some of our biggest websites, e.g.

Convert React JavaScript code to TypeScript with proper typing

🐣 Pre-evaluate code at build-time