Performance, Accessibility & Security Production-ready patterns for building fast, accessible, and secure React applications. Performance Optimization Code-Splitting Automatic with TanStack Router: - File-based routing automatically code-splits by route - Each route is its own chunk - Vite handles dynamic imports efficiently Manual code-splitting: Route-level lazy loading: React Compiler First The React Compiler automatically optimizes performance when you write compiler-friendly code: ✅ Do: - Keep components pure (no side effects in render) - Derive values during render (don't stash in refs)…