✨window & document | Nuxt3

package.json

{
  "devDependencies": {
    "nuxt": "3.0.0",
  }
}

pages/index.vue

<script setup>
const screenHeight = ref('')
const documentTitle = ref('')

onMounted(() => {
  screenHeight.value = window.screen.height
  documentTitle.value = document.title
})
</script>

<template>
<div>
  <div>{{ screenHeight }}</div>
  <div>{{ documentTitle }}</div>
</div>
</template>

Ref.

https://nuxt.com/docs/api/advanced/hooks