Vite Patterns

This is your reference when configuring vite.config.ts, debugging HMR issues, or setting up environment variables and dev proxies. It covers the essentials: dependency pre-bundling, the difference between dev and build modes, plugin ordering, and library mode configuration. The security section on VITE_ prefixed variables is worth reading even if you've shipped Vite apps before. Most people don't realize those vars are statically inlined at build time and fully visible in production bundles. Also flags the critical gap that vite build doesn't type-check, so type errors ship silently unless you add vite-plugin-checker or run tsc in CI.