Nuxt

Nuxt Development

Overview

This skill provides specialized guidance for developing Nuxt applications (v3+), including Vue best practices, Nuxt-specific conventions, ecosystem library knowledge, and access to up-to-date documentation.

When to Use This Skill

Trigger this skill when:

• Working in a project with nuxt as a dependency in package.json
• Creating or editing .vue single-file components
• Working with .ts or .tsx files in Nuxt directories: pages/, server/, composables/, middleware/, layouts/, or utils/
• Working with Nuxt-specific files: nuxt.config.ts, app.vue, or any file in Nuxt convention directories
• Questions about Nuxt architecture, routing, or SSR/SSG patterns
• User mentions Nuxt-specific concepts: composables, auto-imports, server routes, server API, middleware, file-based routing
• Debugging Nuxt-specific issues or errors

Documentation Access

Official Nuxt Documentation

Fetch up-to-date Nuxt documentation when needed:

https://nuxt.com/llms.txt

Fetch when:

• Uncertain about current Nuxt API syntax or conventions
• User asks about specific Nuxt features or modules
• Working with recently released Nuxt features
• Encountering Nuxt-specific errors or configuration issues
• Need to verify patterns work with the specific Nuxt version in use

Quick Reference

Auto-Imported APIs (No Import Needed)

Nuxt automatically imports these without explicit import statements:

Vue APIs: ref, reactive, computed, watch, onMounted, defineProps, defineEmits, defineModel

Nuxt Composables: useState, useFetch, useAsyncData, useRoute, useRouter, navigateTo, useCookie, useHead, useSeoMeta, useRuntimeConfig, showError, clearError

Auto-imports:

• Components from components/ directory
• Composables from composables/ directory
• Server utilities from server/utils/ directory

File-Based Conventions

Routing:

• pages/index.vue → /
• pages/about.vue → /about
• pages/users/[id].vue → /users/:id (dynamic route)

Server API:

• server/api/users.get.ts → /api/users (GET endpoint)
• server/api/users.post.ts → /api/users (POST endpoint)
• server/routes/healthz.ts → /healthz (custom route)

Layouts & Middleware:

• layouts/default.vue - Default layout
• middleware/auth.ts - Named middleware (use via definePageMeta({ middleware: 'auth' }))
• middleware/analytics.global.ts - Global middleware (runs on every route)

Nuxt CLI Commands

Development:

• nuxt dev - Start development server
• nuxt dev --host - Expose to network

Building:

• nuxt build - Production build
• nuxt generate - Static site generation
• nuxt preview - Preview production build

Analysis:

• nuxt analyze - Bundle size analysis
• nuxt typecheck - Type checking
• nuxt info - Environment info for bug reports

Project Dependency Detection

Important: Before providing library-specific guidance, check if the library is installed by examining package.json. Only include library-specific advice for dependencies that exist in the project.

Core Libraries (Included by Default)

• Vue - Component framework (auto-imported)
• Vue Router - Routing (file-based, managed by Nuxt)
• Nitro - Server engine (built into Nuxt)

Optional Libraries to Check

Check package.json for these before suggesting their features:

State & Utilities:

• pinia or @pinia/nuxt - State management → See references/pinia.md
• @vueuse/core or @vueuse/nuxt - Composition utilities → See references/vueuse.md
• drizzle-orm - Database ORM → See references/drizzle-db0.md
• @nuxthub/core - Full-stack platform (DB, blob, KV, cache) → See references/nuxthub.md

Testing:

• @nuxt/test-utils + vitest - Unit and component testing → See references/nuxt-testing.md

Core Nuxt Modules (Dedicated References):

• @nuxt/ui - UI component library → See references/nuxt-ui.md
• @nuxt/image - Image optimization → See references/nuxt-image.md
• @nuxt/content - File-based CMS → See references/nuxt-content.md
• @nuxtjs/i18n - Internationalization → See references/nuxt-i18n.md
• @nuxtjs/tailwindcss - Tailwind CSS → See references/tailwind.md

Other Nuxt Modules:

• @nuxt/icon, @nuxtjs/seo, @nuxtjs/color-mode → See references/nuxt-modules.md
• @nuxt/eslint, @nuxt/fonts, @nuxt/scripts, nuxt-security → See references/nuxt-modules.md

References

This skill includes detailed reference documentation for specific topics. Load these files as needed when working with specific features:

Core Best Practices

references/vue-best-practices.md - Vue component patterns and conventions

• Use when writing or reviewing Vue components
• Covers: Script setup syntax, props/emits/v-model, component structure, template directives, reactivity patterns

references/nuxt-patterns.md - Common Nuxt patterns and recipes

• Use when implementing features or solving common tasks
• Covers: Data fetching, SEO/meta tags, error handling, environment config, server API routes, middleware, state management, composables, layouts, plugins

Core Nuxt Modules (Comprehensive Documentation)

references/nuxt-ui.md - Nuxt UI component library (Last updated: 2025-01)

• Only use if @nuxt/ui is installed
• Covers: v3/v4 setup and migration, components (forms, buttons, modals, tables), Tailwind v4 integration, theming, validation, troubleshooting
• Important: Includes version-specific breaking changes and setup requirements

references/tailwind.md - Tailwind CSS in Nuxt (Last updated: 2025-01)

• Only use if @nuxtjs/tailwindcss is installed
• Covers: v3/v4 setup, configuration, responsive design, dark mode, custom utilities, plugins, JIT mode, performance optimization

references/nuxt-image.md - Image optimization (Last updated: 2025-01)

• Only use if @nuxt/image is installed
• Covers: NuxtImg/NuxtPicture components, image providers, lazy loading, responsive images, performance optimization

references/nuxt-content.md - File-based CMS (Last updated: 2025-01)

• Only use if @nuxt/content is installed
• Covers: Markdown/YAML content, queryContent API, components (ContentDoc, ContentList), navigation, search, pagination, syntax highlighting

references/nuxt-i18n.md - Internationalization (Last updated: 2025-01)

• Only use if @nuxtjs/i18n is installed
• Covers: Multi-language routing, translations, locale switching, SEO, number/date formatting, pluralization, composables

State Management & Utilities

references/pinia.md - Pinia state management

• Only use if pinia or @pinia/nuxt is installed
• Covers: Store definition, component usage, SSR, persistence, testing

references/vueuse.md - VueUse composables

• Only use if @vueuse/core or @vueuse/nuxt is installed
• Covers: State management composables, browser APIs, element interaction, utilities, common patterns

references/drizzle-db0.md - Database with Drizzle ORM

• Only use if drizzle-orm is installed (without NuxtHub)
• Covers: Setup, schema definition, CRUD operations, queries, joins, filtering, transactions, migrations, type safety

references/nuxthub.md - NuxtHub Full-Stack Platform (Last updated: 2025-12)

• Only use if @nuxthub/core is installed
• Covers: Multi-vendor deployment, Drizzle ORM integration, blob storage, KV storage, caching, migrations CLI, DevTools integration
• Note: NuxtHub v0.10 uses Drizzle ORM with hub:db imports - different from standalone Drizzle setup

Testing

references/nuxt-testing.md - Nuxt Test Utils with Vitest (Last updated: 2025-12)

• Only use if @nuxt/test-utils and vitest are installed
• Covers: Vitest configuration, test environments, mountSuspended, renderSuspended, mockNuxtImport, mockComponent, registerEndpoint, component/composable/API testing patterns

Other Modules

references/nuxt-modules.md - Other official Nuxt modules

• Brief overview of: @nuxt/icon, @nuxtjs/seo, @nuxtjs/color-mode, @nuxt/eslint, @nuxt/fonts, @nuxt/scripts, nuxt-security
• For detailed guidance on @nuxt/ui, @nuxt/image, @nuxt/content, @nuxtjs/i18n, or @nuxtjs/tailwindcss, use their dedicated reference files instead

How to Use This Skill

1. Check dependencies - Examine package.json first to know what libraries are available
2. Follow Vue best practices - Apply patterns from vue-best-practices.md to all component code
3. Leverage auto-imports - Don't manually import Nuxt/Vue composables that are auto-imported
4. Use file-based conventions - Follow Nuxt's directory structure for routing, APIs, and middleware
5. Reference library docs - When a library is installed, consult its reference file for specific patterns
6. Verify version-specific features - Reference files include "Last updated" dates; verify with official docs for version-specific details
7. Fetch official docs - For recent features or uncertainty, fetch from https://nuxt.com/llms.txt or module-specific documentation URLs

Version-Specific Information

• Reference files with dates (marked "Last updated: YYYY-MM") contain version-specific info
• Verify with official docs when:
  • Working with modules not documented in references
  • Module version differs significantly from documentation date
  • Encountering breaking changes or migration scenarios
  • Uncertain about syntax or API for current version
• Fallback principle: If reference documentation doesn't match project needs, fetch official docs rather than guessing

Important Conventions

Component Files Must:

• Use <script setup lang="ts"> syntax
• Place <template> section first, before <script> and <style>
• Use type-based defineProps(), defineEmits(), and defineModel()
• Use multi-word component names (except pages/layouts)
• Use v-for="item of items" with :key
• Prefer ref() over reactive()

TypeScript Organization:

• Place all types/interfaces in /types directory (or /app/types in Nuxt 4)
• Organize by domain: types/user.ts, types/post.ts, types/auth.ts
• NO barrel exports - import directly from specific files: import type { User } from '~/types/user'
• Use PascalCase naming conventions:
  • Props interfaces: ButtonProps, CardProps
  • State interfaces: AuthState, UserState
  • API types: CreateUserRequest, CreateUserResponse
• Don't use as any - prefer type guards, type narrowing, or as unknown as Type when absolutely necessary

File Structure (Nuxt 4):

• Nuxt 4 supports optional /app directory for app-specific code
• Components can live in /components or /app/components
• Composables can live in /composables or /app/composables
• Types can live in /types or /app/types
• Both root-level and /app directory structures are supported

Data Fetching State Handling:

• Use status property (not deprecated pending)
• Status values: 'idle' | 'pending' | 'success' | 'error'
• Destructure: const { data, status, error } = await useFetch(...)
• Handle all states in templates:

  <div v-if="status === 'pending'">Loading...</div>
  <div v-else-if="status === 'error'">Error: {{ error }}</div>
  <div v-else>{{ data }}</div>
  

Styling Strategy:

• Check package.json for @nuxtjs/tailwindcss dependency
• If Tailwind is installed: Prefer Tailwind utility classes in templates
  • Use arbitrary variants for scrollbars: [&::-webkit-scrollbar]:w-1.5
  • Use @theme directive for custom animations and CSS variables
  • Use arbitrary variants for pseudo-elements: before:content-['★']
• If Tailwind is NOT installed: Use <style scoped> for component styles
• Use <style> only for: Very complex keyframes, cross-browser scrollbars, or unreadable utility expressions

Accessibility:

• Add appropriate ARIA attributes to interactive elements
• Ensure keyboard navigation support (tab order, enter/space handlers)
• Use semantic HTML elements (<button>, <nav>, <main>, etc.)

Nuxt Projects Should:

• Don't manually import auto-imported composables
• Use useFetch for API calls instead of manual fetch
• Define server routes in server/api/ with .get.ts, .post.ts naming
• Use useState for shared state across components
• Use definePageMeta for page-specific config (middleware, layout, etc.)

When Libraries Are Installed:

• Pinia - Use for complex state management across many components
• VueUse - Prefer VueUse composables over custom implementations for common patterns
• Drizzle - Use for type-safe database operations with full TypeScript inference

VueUse Integration Guidelines:

When encountering custom utility implementations for common patterns, check if VueUse provides an equivalent solution:

• State patterns: useAsyncData, useToggle, useCounter, useLocalStorage, useSessionStorage
• DOM interactions: useMouse, useScroll, useElementVisibility, useIntersectionObserver, useResizeObserver
• Browser APIs: useClipboard, useMediaQuery, useDark, usePreferredDark, useGeolocation
• Utilities: refDebounced, useDebounceFn, refThrottled, useThrottleFn, useInterval, useTimeout

When to suggest VueUse:

• Detecting bespoke implementations of the above patterns
• User asks about utilities for common tasks (debouncing, throttling, etc.)
• Building features that require browser API abstractions

Only suggest if:

• @vueuse/core or @vueuse/nuxt is in package.json, OR
• User explicitly asks about VueUse or requests suggestions for utility libraries

Avoid:

• Force VueUse if not installed
• Suggest VueUse for simple one-off logic that doesn't need a composable