Nuxt/test/fixtures/children/pages/patch/_id/child.vue

<template>
  <div>
    <h3>
      child: <i data-date-child>
        {{ date }}
      </i>
    </h3>
    <NuxtChild />
  </div>
</template>

<script>
export default {
  asyncData () {
    return {
      date: Date.now()
    }
  }
}
</script>