ZeroDay Dev vs JavaScript Programming

Learn to break things—before attackers do. ZeroDay Dev teaches secure coding and blockchain security through 4,000+ hands-on challenges. Learn from 120+ real-world exploits: Beanstalk, Indexed Finance, bZx, VeilCash, Sigma.Money, Bybit, and more. Each exploit is linked to verified incident records so you learn from actual on-chain events, not hypotheticals. Practice — Build exploit intuition without reading docs. Tap vulnerable lines, drag tokens into code, get instant feedback. Filter by domain (Exploits, Solidity, Rust, DeFi, Solana) or difficulty. Exercises — Full code challenges with reference solutions. Deeper dives when you're ready. Exam — Prepare for real security assessments. Timed tests across domains with performance tracking. Memory-match decks for opcodes, EIPs, and security terms. Deep Dive Hub — Curated learning tracks for Web2, Web3, Rust, ZK Proofs, and Trading. Recommended tracks driven by your weak areas. Build your own from bookmarks or missed questions. Streaks & XP — Stay consistent and level up. Daily streaks, badges, and progression keep you coming back. Offline-first — Learn on the subway, no Wi‑Fi needed. All content lives on your device. No account required—start immediately. Covers reentrancy, oracle manipulation, flash loans, proxy races, ZK trusted setup, and more. Rust, Solidity, DeFi, Solana & cybersecurity.

JavaScript Programming is an independent study app designed for focused, practical JS practice with clear feedback on every attempt. It helps you build confidence step by step, whether you are just starting out, preparing for interviews, studying in a bootcamp, or refreshing core concepts as a working developer. You get 160 questions across: - Fundamentals - Practical Skills - Common Pitfalls - Advanced Concepts Main features: - Spaced-repetition review powered by FSRS intervals - Weak-point heatmap to identify fragile areas quickly - Daily challenge to keep your learning streak active - Mock exams for realistic timed practice sessions - Every question includes a concise explanation - Offline practice for study anywhere, anytime Independent study app for JavaScript programming practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners. Practice offline, no login required.