Nuxt 4 SEOとメタタグ完全ガイド2026年版：useHead、useSeoMetaと面接対策

<!-- pages/product/[id].vue -->
<script setup lang="ts">
const product = await useFetch(`/api/products/${route.params.id}`)

useSeoMeta({
  title: () => product.data.value?.name,
  description: () => product.data.value?.description,
  ogTitle: () => product.data.value?.name,
  ogDescription: () => product.data.value?.description,
  ogImage: () => product.data.value?.imageUrl,
  ogType: 'product',
  twitterCard: 'summary_large_image',
  twitterTitle: () => product.data.value?.name,
  twitterDescription: () => product.data.value?.description,
  twitterImage: () => product.data.value?.imageUrl,
})
</script>

<!-- pages/about.vue -->
<script setup lang="ts">
if (import.meta.server) {
  useSeoMeta({
    title: 'About SharpSkill',
    description: 'Technical interview preparation platform for developers',
    ogTitle: 'About SharpSkill',
    ogDescription: 'Technical interview preparation platform for developers',
    ogImage: 'https://sharpskill.dev/og-about.png',
    robots: 'index, follow',
  })
}
</script>

<!-- pages/blog/[slug].vue -->
<script setup lang="ts">
const route = useRoute()
const config = useRuntimeConfig()

useHead({
  link: [
    {
      rel: 'canonical',
      href: `${config.public.siteUrl}/blog/${route.params.slug}`,
    },
    {
      rel: 'alternate',
      hreflang: 'fr',
      href: `${config.public.siteUrl}/fr/blog/${route.params.slug}`,
    },
  ],
  script: [
    {
      type: 'application/ld+json',
      innerHTML: JSON.stringify({
        '@context': 'https://schema.org',
        '@type': 'Article',
        headline: article.value?.title,
        author: { '@type': 'Person', name: 'Anthony Fillion-Maillet' },
        datePublished: article.value?.publishedAt,
      }),
    },
  ],
})
</script>

export default defineNuxtConfig({
  app: {
    head: {
      titleTemplate: '%s | SharpSkill',
      meta: [
        { charset: 'utf-8' },
        { name: 'viewport', content: 'width=device-width, initial-scale=1' },
      ],
      link: [
        { rel: 'icon', type: 'image/x-icon', href: '/favicon.ico' },
      ],
    },
  },
})

<!-- layouts/default.vue -->
<script setup lang="ts">
useSeoMeta({
  ogSiteName: 'SharpSkill',
  twitterSite: '@sharpskill',
})
</script>

<!-- pages/index.vue -->
<script setup lang="ts">
useSeoMeta({
  title: 'Technical Interview Preparation',
  description: 'Prepare for your next technical interview with practice questions and mock interviews',
})
</script>

<script setup lang="ts">
useSeoMeta({
  ogImage: 'https://example.com/og-image.png',
  ogImageWidth: 1200,
  ogImageHeight: 630,
  ogImageAlt: 'Article preview showing code editor with Vue syntax',
})
</script>

<!-- pages/profile/[username].vue -->
<script setup lang="ts">
const user = await useFetch(`/api/users/${route.params.username}`)

useHeadSafe({
  title: user.data.value?.displayName,
  meta: [
    { name: 'description', content: user.data.value?.bio },
  ],
})
</script>

export default defineNuxtConfig({
  modules: ['@nuxtjs/seo'],
  site: {
    url: 'https://sharpskill.dev',
    name: 'SharpSkill',
  },
})