Vue.js TypeScript Best Practices Checklist: Code Structure, Performance & Optimization Guide

Follow these essential guidelines to build high-quality Vue.js applications with TypeScript:

### Code Style and Organization
- Craft short, readable TypeScript code with practical examples for easy maintenance.
- Prioritize functional and declarative approaches; steer clear of class-based patterns.
- Promote reusability through loops, modularity, and DRY principles to eliminate repetition.
- Choose clear variable names incorporating helper verbs like `isActive` or `shouldFetch`.
- Structure files logically: limit each to specific exports like components, utilities, types, or assets.

### Naming Standards
- Adopt kebab-case for folders (e.g., `ui/modal-dialog`).
- Opt for named exports on functions for better tree-shaking and imports.

### TypeScript Implementation
- Apply TypeScript universally; select interfaces over type aliases for superior extensibility.
- Replace enums with object maps to improve safety and adaptability.
- Develop functional components backed by TypeScript interfaces.

### Syntax and Composition
- Declare pure functions with the `function` keyword for hoisting benefits and readability.
- Exclusively use Vue's Composition API in `<script setup>` format.

### UI Components and Design
- Integrate Headless UI, Element Plus, and Tailwind CSS for flexible, accessible UIs.
- Ensure mobile-first responsiveness via Tailwind utilities.

### Performance Enhancements
- Utilize VueUse composables to boost reactivity and efficiency.
- Enclose async components in `<Suspense>` with custom fallback interfaces.
- Apply dynamic imports for secondary components to reduce initial loads.
- Enhance images with WebP encoding, explicit dimensions, and native lazy loading.
- Configure Vite for intelligent code splitting and minimal bundle outputs.

### Core Metrics
- Monitor and improve Core Web Vitals (LCP, CLS, INP) using Lighthouse audits or WebPageTest.