/modern-web-performance

⚡ High-Performance Web Engineering

> **Source**: Vercel Best Practices / Anthony Fu (Antfu) Engineering Standards

This skill focuses on "Elite-Level" web development: speed, zero-config DX, and scalable architecture.

🚀 1. The Vercel Way (Modern Stack)

• **Edge-First Thinking**: Prioritize logic that runs on the Edge (Middleware, Edge Functions) to reduce TTFB.
• **Incremental Static Regeneration (ISR)**: Update static content without a full rebuild.
• **Server Component Patterns**: Minimize client-side JS. Use `use server` sparingly and only where needed.

🛠️ 2. Antfu-Grade Developer Experience (DX)

• **Zero-Config Philosophy**: Use modern tools like `Vite`, `Vitest`, and `ESLint (flat config)` to minimize boilerplate.
• **Composable Logic**: Build small, single-responsibility functions (Vue Composables or React Hooks) that are highly unit-testable.
• **Type-Safety Everywhere**: No `any`. Use Zod for runtime validation and strict TS configs.

📦 3. Monorepo & Scalability

• **Turborepo Master**: Manage multi-package projects with intelligent caching and parallel execution.
• **Shared UI Libraries**: Split the UI into a separate package within the monorepo for reuse across Web/Mobile.
• **Package Modernization**: Migrate from CJS to ESM. Ensure `package.json` exports are correctly defined.

🧪 4. Performance Auditing

• **Core Web Vitals**: Monitor LCP, FID, and CLS. Chasing "100" on PageSpeed Insights is the goal.
• **Bundle Analysis**: Use tools to find and remove "heavy" dependencies.
• **Preload/Prefetch Strategies**: Optimize asset loading for critical paths.

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