Nuxt/examples/nuxt-prefetch/nuxt.config.js

export default {
  head: {
    titleTemplate: '%s - NuxtJS Prefetching'
  },
  router: {
    // To disable prefetching, uncomment the line
    // prefetchLinks: false

    // Activate prefetched class (default: false)
    linkPrefetchedClass: 'nuxt-link-prefetched'
  }
}