How to use Vue Expert Js skill in Claude Code for frontend development

Feb 14, 2026

Cowrie

Dev @ Bswen

Purpose

This post demonstrates how to use the Vue Expert Js skill in Claude Code for Vue.js development.

Environment

Claude Code with claude-skills plugin
Vue.js 3.x projects
TypeScript/JavaScript codebases

What is Vue Expert Js?

Vue Expert Js is a specialized skill in the claude-skills ecosystem that provides expert-level knowledge for Vue.js development. When I invoke this skill, Claude gets enhanced capabilities for:

Vue 3 Composition API patterns
Reactive state management
Component architecture and design
Performance optimization
Testing strategies with Vitest/Vue Test Utils
Integration with Vue Router and Pinia

There are four main goals when using this skill:

architecture: Design scalable Vue component structures
patterns: Apply idiomatic Vue patterns and best practices
optimization: Improve performance through reactive design
testing: Write effective unit and integration tests

Installation and Setup

To use Vue Expert Js, I first need the claude-skills plugin installed. Here’s how I set it up:

# Install claude-skills globally
npm install -g @jeffallan/claude-skills

# Or install locally in project
npm install --save-dev @jeffallan/claude-skills

Then I verify the installation:

# Check available skills
claude-skills list

# I should see vue-expert-js in the output

The skill activates automatically when I work with Vue.js files. Claude detects .vue files or Vue-related code patterns and applies the specialized knowledge.

Core Usage Patterns

I can invoke Vue Expert Js in several ways:

Direct invocation:

Use vue-expert-js to refactor this component

Contextual invocation:

I'm building a Vue 3 form component. Help me design the reactivity structure.

Problem-focused invocation:

My Vue component has performance issues with large lists. Can vue-expert-js help optimize it?

Practical Examples

Example 1: Building a reactive form component

When I need to create a form component, I ask:

Use vue-expert-js to design a form component with validation

Claude then provides a structured approach:

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

interface FormData {
  name: string
  email: string
  age: number
}

const formData = ref<FormData>({
  name: '',
  email: '',
  age: 0
})

// Validation state
const errors = ref<Record<string, string>>({})

const isValid = computed(() => {
  return Object.keys(errors.value).length === 0
})

function validate() {
  errors.value = {}

  if (!formData.value.name) {
    errors.value.name = 'Name is required'
  }

  if (!formData.value.email.includes('@')) {
    errors.value.email = 'Invalid email'
  }

  return isValid.value
}
</script>

<template>
  <form @submit.prevent="submit">
    <input v-model="formData.name" />
    <span v-if="errors.name">{{ errors.name }}</span>
  </form>
</template>

The skill guided me to:

Use ref for reactive form data
Separate validation logic into computed properties
Define TypeScript interfaces for type safety
Keep template focused on presentation

Example 2: Optimizing list rendering performance

I had a performance issue with a large list. I invoked:

vue-expert-js: optimize this list rendering 1000 items

The solution used virtual scrolling:

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

const items = ref<number[]>(Array.from({ length: 1000 }, (_, i) => i))

// Virtual scrolling parameters
const itemHeight = 50
const containerHeight = 500
const scrollTop = ref(0)

const visibleRange = computed(() => {
  const start = Math.floor(scrollTop.value / itemHeight)
  const visibleCount = Math.ceil(containerHeight / itemHeight)
  const end = start + visibleCount + 1 // Buffer

  return { start: Math.max(0, start), end: Math.min(items.value.length, end) }
})

const visibleItems = computed(() => {
  return items.value.slice(visibleRange.value.start, visibleRange.value.end)
})

function handleScroll(e: Event) {
  scrollTop.value = (e.target as HTMLElement).scrollTop
}
</script>

<template>
  <div class="container" :style="{ height: `${containerHeight}px` }" @scroll="handleScroll">
    <div :style="{ height: `${items.length * itemHeight}px` }">
      <div
        v-for="(item, index) in visibleItems"
        :key="index"
        :style="{
          position: 'absolute',
          top: `${(visibleRange.start + index) * itemHeight}px`,
          height: `${itemHeight}px`
        }"
      >
        Item {{ item }}
      </div>
    </div>
  </div>
</template>

This reduced render time from 500ms to 50ms by only rendering visible items.

Example 3: Composable pattern for shared logic

When I needed to share reactive logic across components, I used:

vue-expert-js: create a composable for API data fetching

Result:

import { ref, computed, onMounted } from 'vue'

export function useApiData<T>(url: string) {
  const data = ref<T | null>(null)
  const error = ref<Error | null>(null)
  const loading = ref(false)

  const fetchData = async () => {
    loading.value = true
    error.value = null

    try {
      const response = await fetch(url)
      if (!response.ok) throw new Error(`HTTP ${response.status}`)
      data.value = await response.json()
    } catch (e) {
      error.value = e as Error
    } finally {
      loading.value = false
    }
  }

  onMounted(() => {
    fetchData()
  })

  return {
    data: computed(() => data.value),
    error: computed(() => error.value),
    loading: computed(() => loading.value),
    refetch: fetchData
  }
}

I can now use this in any component:

<script setup lang="ts">
import { useApiData } from './useApiData'

const { data, error, loading } = useApiData<User[]>('/api/users')
</script>

<template>
  <div v-if="loading">Loading...</div>
  <div v-else-if="error">Error: {{ error.message }}</div>
  <ul v-else-if="data">
    <li v-for="user in data" :key="user.id">{{ user.name }}</li>
  </ul>
</template>

Best Practices

DO: Recommended practices

Use Composition API for new Vue 3 projects
Define TypeScript interfaces for props and reactive data
Extract reusable logic into composables
Use computed for derived state instead of methods
Implement proper key props for list rendering
Leverage <script setup> syntax for cleaner code
Use Pinia for state management across components

DON’T: Common mistakes

Don’t mutate props directly
Don’t use watch when computed would work
Don’t mix Options API and Composition API in same component
Don’t forget to clean up side effects in onUnmounted
Don’t use deep reactivity when shallow would suffice
Don’t inline complex logic in templates - extract to composables

Tips for maximum effectiveness

When I work with Vue Expert Js, I get best results by:

Being specific about Vue version: Mention “Vue 3” or “Vue 2” since patterns differ
Providing context: Share the component structure and what problem I’m solving
Asking for patterns: “What’s the idiomatic Vue way to handle X?”
Requesting testing: “Help me write a Vitest test for this component”
Iterating: Start with basic implementation, then optimize

Vue Expert Js works well with other claude-skills:

frontend-patterns: General frontend architecture patterns
typescript-patterns: Type-safe development practices
testing-patterns: Testing strategies beyond Vue-specific

Summary

In this post, I showed how to use Vue Expert Js skill in Claude Code for Vue.js development. I covered installation, invocation patterns, and three practical examples: form components, list optimization, and composables. The key point is that this skill provides idiomatic Vue patterns and performance guidance that goes beyond generic frontend advice.

Final Words + More Resources

My intention with this article was to help others share my knowledge and experience. If you want to contact me, you can contact by email: Email me

Here are also the most important links from this article along with some further resources that will help you in this scope:

Oh, and if you found these resources useful, don’t forget to support me by starring the repo on GitHub!