Learn the concepts, then build from scratch. Each challenge comes with a deep-dive tutorial and a hands-on practice environment.
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Each challenge has a detailed learn page covering concepts, architecture, code walkthroughs, and interview Q&A.
Jump into the practice page with a basic setup ready. The data and UI shell are there — you write the logic.
Understand the why behind every pattern. Each tutorial ends with common follow-up questions interviewers ask.
Challenges
Build a skeleton loader that shows animated placeholder shapes while a user profile card loads.
Build a split-pane markdown editor with real-time preview. Write your own markdown-to-HTML parser — no libraries.
Build an autocomplete input with debounced API calls, keyboard navigation, and highlighted matching text.
Build a full-stack todo app with server-side rendering, API routes, and client-side interactivity.
Implement a debounce function from scratch and wire it to a search input with an event log.
Testimonials
Join 3,500+ developers who use Event Looped to prepare for frontend interviews.
Priya S.
Frontend Engineer @ Startup
“The learn-then-build approach is exactly what I needed. I went from struggling with machine coding rounds to clearing 3 out of 4 interviews.”
Gaurav Sharma
Senior Developer
“The deep-dive tutorials are better than most paid courses. The interview Q&A sections alone are worth it — helped me answer follow-ups I'd never thought of.”
Rahul M.
Full Stack Developer
“I practiced the todo and infinite scroll challenges the night before my interview. Both came up almost exactly. Landed the offer the next week.”
Sarah L.
Frontend Lead
“I recommend this to every junior dev on my team. The code quality in the solutions is production-grade, not just interview-grade.”
Dev Prajapati
React Developer
“The virtualized list and OTP challenges were tricky but the tutorials broke them down perfectly. Felt confident building them from scratch after.”
Shivani Yadav
Software Engineer
“Clean code, real patterns, no fluff. This is how interview prep should be. I use it to warm up before every frontend interview loop.”
Built for developers, by developers. Happy coding! 🚀