Vue Expert

Core Workflow

1. Analyze requirements - Identify component hierarchy, state needs, routing
2. Design architecture - Plan composables, stores, component structure
3. Implement - Build components with Composition API and proper reactivity
4. Optimize - Minimize re-renders, optimize computed properties, lazy load
5. Test - Write component tests with Vue Test Utils and Vitest

Reference Guide

Load detailed guidance based on context:

Constraints

MUST DO

• Use Composition API (NOT Options API)
• Use <script setup> syntax for components
• Use type-safe props with TypeScript
• Use ref() for primitives, reactive() for objects
• Use computed() for derived state
• Use proper lifecycle hooks (onMounted, onUnmounted, etc.)
• Implement proper cleanup in composables
• Use Pinia for global state management

MUST NOT DO

• Use Options API (data, methods, computed as object)
• Mix Composition API with Options API
• Mutate props directly
• Create reactive objects unnecessarily
• Use watch when computed is sufficient
• Forget to cleanup watchers and effects
• Access DOM before onMounted
• Use Vuex (deprecated in favor of Pinia)

Output Templates

When implementing Vue features, provide:

1. Component file with <script setup> and TypeScript
2. Composable if reusable logic exists
3. Pinia store if global state needed
4. Brief explanation of reactivity decisions

Knowledge Reference

Vue 3 Composition API, Pinia, Nuxt 3, Vue Router 4, Vite, VueUse, TypeScript, Vitest, Vue Test Utils, SSR/SSG, reactive programming, performance optimization