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The ultimate frontend skills platform
Master Frontend
Development Skills
Build real-world projects and master core concepts with our curated collection of coding challenges, system design architectures, and practice tasks.
Coding Challenges
Interactive editor with real-world problems. Master DOM manipulation, algorithms, and React patterns.
System Design
Deep dive into frontend architecture. Learn to build scalable News Feeds, Chat Apps, and E-commerce platforms.
Project Portfolio
End-to-end project briefs. Build complete applications with realistic requirements to boost your portfolio.
Featured Challenges
Popular skills mastered by the community
JavaScript
Function.prototype.call Polyfill
Implement a Function.prototype.call polyfill from scratch. Master JavaScript this binding, execution context, primitive boxing, and safe property assignment techniques.
JavaScriptFunctionsthis
Blogs
Client-Side Rate Limiter
How I built a simple, client-only rate limiter to keep code execution fast, safe, and predictable without any backend dependency.
JavaScriptRate LimiterClient-Side+1
React
Image Carousel
Create an interactive image carousel in React with smooth slide transitions, navigation arrows, dot indicators, autoplay, and touch/swipe support for mobile devices.
ReactJavaScript
React
Dynamic Tic Tac Toe
Build a dynamic Tic Tac Toe game in React with customizable grid sizes, win detection algorithms, player turn management, and game reset functionality. Great for interviews.
ReactJavaScript