Nuxt/test/fixtures/basic/pages/hydration/layout.vue

<script setup lang="ts">
definePageMeta({
  layout: 'custom-async',
})

if (import.meta.client && !useNuxtApp().isHydrating) {
  throw createError({
    fatal: true,
    message: '`useNuxtApp().isHydrating` is false by the time we run page setup',
  })
}
</script>

<template>
  <div>
    Tests whether hydration is properly resolved within an async layout
  </div>
</template>