200 important JavaScript interview questions for busy Front End Engineers (updated for 2025)

Futuristic Sci-Fi UI Web Framework.

Modern. Native. Delightful Web Debugging Proxy for macOS, iOS, and Android ⚡️

5kB WebGL globe lib.

An HTTP/1.1 client, written from scratch for Node.js

Sudo-flix's source code (Allegedly)

Curated front end system design resources for interviews and learning

A lightweight, extendable front-end developer tool for mobile web page.

Serverless plugin to support externalising node modules onto Lambda layers when using esbuild

WebContainer API Documentation

Audited & minimal JS implementation of elliptic curve cryptography.

A RPG multiplayer game that will be used for interviews and internal workshops.

Enlightened library to convert HTML and CSS to SVG

Fast and accurate React renderer for Notion. TS batteries included. ⚡️

Notion as CMS with easy API access

Mount React components to the DOM using custom elements

😎 Awesome lists about all kinds of interesting topics

Collection of TypeScript type challenges with online judge

It's like curl -v, with colours.

IPFS implementation in JavaScript

Polyfill for the HTML dialog element

The Chrome DevTools UI

Implement Mini-React in 400 lines of code, a minimal model with asynchronous interruptible updates.

A description of React's new core algorithm, React Fiber

Rust-based platform for the Web

Wait for expectation to be true, useful for integration and end to end testing. Integral part of react-testing-library.

Detect any handles leaked in node

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