Nuxt/docs/content/3.docs/2.directory-structure/5.composables.md

icon	title	head.title
IconDirectory	composables	Composables directory

Composables directory

Nuxt 3 supports composables/ directory to automatically import your Vue composables into your application using auto-imports!

Example: (using named export)

import { useState } from '#app'

export const useFoo = () => {
  return useState('foo', () => 'bar')
}

Example: (using default export)

import { useState } from '#app'

// It will be available as useFoo() (pascalCase of file name without extension)
export default function () {
  return useState('foo', () => 'bar')
}

You can now auto-import it:

<template>
  <div>
    {{ foo }}
  </div>
</template>

<script setup>
const foo = useFoo()
</script>