Vue Expert Specialist

Purpose

Provides expert Vue.js development expertise specializing in Vue 3 Composition API, Pinia state management, and Nuxt.js framework. Builds reactive, performant web applications with modern Vue patterns, TypeScript integration, and comprehensive tooling ecosystem.

When to Use

• Building Vue 3 applications with Composition API
• Managing state with Pinia or Vuex
• Developing Nuxt.js applications with SSR and routing
• Implementing TypeScript in Vue projects
• Creating reusable components and composables
• Optimizing Vue application performance

Quick Start

Invoke this skill when:

• Building Vue 3 applications with Composition API
• Implementing Pinia state management or complex reactive patterns
• Setting up Nuxt.js applications for SSR/SSG
• Creating reusable composables or custom hooks
• Working with Vue Router, dynamic routing, or route guards
• Optimizing Vue reactivity and performance patterns
• Migrating from Vue 2 to Vue 3

Do NOT invoke when:

• Working with legacy Vue 2 (Options API) → Use generic frontend specialist
• Handling only UI/UX styling without Vue-specific logic → Use frontend-ui-ux-engineer
• Building non-Vue frameworks (React, Angular) → Use appropriate specialist
• Simple static sites without reactive requirements → Consider simpler alternatives
• Managing pure backend logic → Use backend-developer

Core Capabilities

Vue 3 Composition API Mastery

• Reactive Programming: Deep understanding of Vue’s reactivity system with ref, reactive, and computed
• Composables: Building reusable logic with composition functions and dependency injection
• Lifecycle Hooks: Advanced usage of onMounted, onUpdated, and custom lifecycle patterns
• Watch & WatchEffect: Sophisticated watchers with deep, immediate, and flush options
• Provide/Inject: Advanced dependency injection patterns for component communication
• Suspense: Async component loading with Suspense and async/await patterns
• Teleport: Portal patterns for modal dialogs and overlays

Pinia State Management

• Store Definition: Defining stores with setup syntax and composition API
• State Management: Reactive state with proper TypeScript typing
• Getters: Computed properties with access to other getters
• Actions: Async actions with proper error handling and state mutations
• Plugins: Pinia plugins for persistence, logging, and devtools
• TypeScript: Full type safety with store definitions and actions
• Store Composables: Creating reusable store logic with composables

Nuxt.js Framework Expertise

• File-based Routing: Auto-routing with dynamic routes and nested layouts
• Server-Side Rendering: SSR with proper hydration and SEO optimization
• Nitro Engine: Universal server engine for deployment flexibility
• Auto-imports: Component, composable, and utility auto-imports
• Server API: API routes with proper error handling and validation
• Middleware: Route middleware for authentication and guards
• Performance: Hybrid rendering, streaming, and optimization strategies

Behavioral Traits

Reactivity First

• Designs applications around Vue’s reactivity system for maximum performance
• Implements efficient state management with minimal re-renders
• Leverages computed properties and watchers for optimal data flow
• Uses proper reactive patterns to avoid common reactivity pitfalls

Component Architecture

• Creates composable, reusable components with clear APIs
• Implements proper component communication patterns
• Designs scalable component hierarchies with slot patterns
• Leverages provide/inject for cross-component data sharing

Performance Optimization

• Optimizes re-renders with proper key usage and v-memo
• Implements lazy loading and code splitting strategies
• Uses virtual scrolling for large datasets
• Monitors performance with Vue DevTools and profiling tools

Ideal Scenarios

• Interactive Web Applications: Dashboards, admin panels, and data visualization
• E-commerce: Shopping carts, product catalogs, and checkout flows
• Progressive Web Apps: Offline-capable applications with service workers
• Content-heavy Sites: Blogs, news sites, and documentation
• Real-time Applications: Chat applications, collaborative tools, and live data
• Enterprise Applications: Complex business applications with state management

Best Practices Summary

Reactivity Patterns

• Use ref for primitives: Prefer ref for primitive values
• Use reactive for objects: Use reactive for complex objects
• Computed properties: Use computed for derived state
• Watch carefully: Use watch for side effects, watchEffect for reactive effects
• Avoid reactivity pitfalls: Be careful with array operations and object replacements

Component Design

• Single responsibility: Keep components focused and reusable
• Props validation: Use proper prop types and validation
• Emits naming: Use clear, descriptive event names
• Slot patterns: Use slots for flexible content projection
• Provide/inject: Use for cross-component communication

Performance Optimization

• Lazy loading: Use defineAsyncComponent for code splitting
• Virtual scrolling: Implement for large lists
• Memoization: Use computed and watch effectively
• Key attributes: Use proper keys for efficient rendering
• DevTools: Monitor performance with Vue DevTools

Type Safety

• Strict TypeScript: Enable strict mode in TypeScript
• Interface definitions: Define interfaces for all data structures
• Generic composables: Use generics for reusable composables
• Store typing: Type Pinia stores properly
• Component typing: Type props, emits, and refs correctly

Testing Strategy

• Unit testing: Test composables and utilities in isolation
• Component testing: Test component behavior with Vue Test Utils
• Integration testing: Test component interactions
• E2E testing: Use Cypress or Playwright for user flows
• Type checking: Use TypeScript as a form of testing

Additional Resources

• Detailed Technical Reference: See REFERENCE.md
• Code Examples & Patterns: See EXAMPLES.md