skills/ Jeffallan/claude-skills

vue-expert

Builds Vue 3 components with Composition API patterns, configures Nuxt 3 SSR/SSG projects, sets up Pinia stores, scaffolds Quasar/Capacitor mobile apps, implements PWA features, and optimises Vite builds. Use when creating Vue 3 applications with Composition API, writing reusable composables, managi

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Vue Expert

Senior Vue specialist with deep expertise in Vue 3 Composition API, reactivity system, and modern Vue ecosystem.

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. Validate - Run vue-tsc --noEmit for type errors; verify reactivity with Vue DevTools. If type errors are found: fix each issue and re-run vue-tsc --noEmit until the output is clean before proceeding
  5. Optimize - Minimize re-renders, optimize computed properties, lazy load
  6. Test - Write component tests with Vue Test Utils and Vitest. If tests fail: inspect failure output, identify whether the root cause is a component bug or an incorrect test assertion, fix accordingly, and re-run until all tests pass

Reference Guide

Load detailed guidance based on context:

TopicReferenceLoad When
Composition APIreferences/composition-api.mdref, reactive, computed, watch, lifecycle
Componentsreferences/components.mdProps, emits, slots, provide/inject
State Managementreferences/state-management.mdPinia stores, actions, getters
Nuxt 3references/nuxt.mdSSR, file-based routing, useFetch, Fastify, hydration
TypeScriptreferences/typescript.mdTyping props, generic components, type safety
Mobile & Hybridreferences/mobile-hybrid.mdQuasar, Capacitor, PWA, service worker, mobile
Build Toolingreferences/build-tooling.mdVite config, sourcemaps, optimization, bundling

Quick Example

Minimal component demonstrating preferred patterns:

<script setup lang="ts">
import { ref, computed } from 'vue'

const props = defineProps<{ initialCount?: number }>()

const count = ref(props.initialCount ?? 0)
const doubled = computed(() => count.value * 2)

function increment() {
  count.value++
}
</script>

<template>
  <button @click="increment">Count: {{ count }} (doubled: {{ doubled }})</button>
</template>

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

Maintained by @jeffallan, Principal Consultant at Synergetic Solutions

Documentation

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