Nuxt/docs/content/2.app/1.app.md

App.vue

The new app.vue file, is the main component in your Nuxt3 applications.

If you would like to customize default layout of website, create app.vue in your project directory. Nuxt will automatically detect it and load it as the parent of all other pages within your application.

Note: Don't forget to use <NuxtPage> component somewhere inside app.vue.

<template>
  <div>
    <NuxtPage />
  </div>
</template>