The library for web and native user interfaces.

The React Framework

Material UI: Comprehensive React component library that implements Google's Material Design. Free forever.

24 Lessons, 12 Weeks, Get Started as a Web Developer

web development for the rest of us

Simple HTML5 Charts using the <canvas> tag

A modern JavaScript utility library delivering modularity, performance, & extras.

jQuery JavaScript Library

The best React-based framework with performance, scalability and security built in.

Prettier is an opinionated code formatter.

⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API

Cheatsheets for experienced React developers getting started with TypeScript

Create the next immutable state by mutating the current one

React components for efficiently rendering large lists and tabular data

Find and fix problems in your JavaScript code.

Simply beautiful open-source icons

Standard Library

📗🌐 🚢 Comprehensive and exhaustive JavaScript & Node.js testing best practices (August 2025)

A set of free MIT-licensed high-quality SVG icons for UI development.

A JavaScript implementation of various web standards, for use with Node.js

🐐 Simple and complete React DOM testing utilities that encourage good testing practices.

👩‍🎤 CSS-in-JS library designed for high performance style composition

A document head manager for React

The commitizen command line utility. #BlackLivesMatter

List of functions which you can use to replace moment.js + ESLint Plugin

An easily internationalizable, mobile-friendly datepicker library for the web

A Node.js tool to automate end-to-end web testing.

Essential metrics for a healthy site.

🏁 High performance subscription-based form state management for React

Calculate the real cost to run your JS app or lib to keep good performance. Show error in pull request if the cost exceeds the limit.