The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.
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Coding articles to level up your development skills
:electron: Build cross-platform desktop apps with JavaScript, HTML, and CSS
A Collection of application ideas which can be used to improve your coding skills.
24 Lessons, 12 Weeks, Get Started as a Web Developer
🗂 The essential checklist for modern web development, for humans and AI agents
JavaScript animation engine
A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows for loading parts of the application on demand. Through "loaders", modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.
A professional front-end template for building fast, robust, and adaptable web apps or sites.
A powerful cross-platform UI toolkit for building native-quality iOS, Android, and Progressive Web Apps with HTML, CSS, and JavaScript.
Prettier is an opinionated code formatter.
The largest open-source library of animated, interactive, and customizable React & Next.js components for building standout web products and experiences. Built for humans and AI agents.
The HTML5 Creation Engine: Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.
30 days of JavaScript programming challenge is a step-by-step guide to learn JavaScript programming language in 30 days. This challenge may take more than 100 days, please just follow your own pace. These videos may help too: https://www.youtube.com/channel/UC7PNRuno1rzYPb1xLa4yktw
A terminal built on web technologies
The zero configuration build tool for the web. 📦🚀
Front End interview preparation materials for busy engineers (updated for 2026)
:hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error tracking, logs, and more – capture all the context agents need to diagnose problems, uncover opportunities, and ship fixes. Steer it all from Slack, web, desktop, or the MCP.
An extremely fast bundler for the web
Materialize, a CSS Framework based on Material Design
FCC China open source codebase and curriculum. Learn to code and help nonprofits.
🔥LeetCode solutions in any programming language | 多种编程语言实现 LeetCode、《剑指 Offer(第 2 版)》、《程序员面试金典(第 6 版)》题解
📗 SheetJS Spreadsheet Data Toolkit -- New home https://git.sheetjs.com/SheetJS/sheetjs
Algorithms and Data Structures implemented in JavaScript for beginners, following best practices.