Nuxt/docs/content/2.guide/2.directory-structure/1.composables.md

---
navigation.icon: IconDirectory
title: 'composables'
head.title: Composables
description: Use the composables/ directory to auto-import your Vue composables into your application.
---

# Composables Directory

Nuxt 3 uses the `composables/` directory to automatically import your Vue composables into your application using [auto-imports](/guide/concepts/auto-imports)!

Under the hood, Nuxt auto generates the file `.nuxt/imports.d.ts` to declare the types.

Be aware that you have to run `nuxi prepare`, `nuxi dev` or `nuxi build` in order to let Nuxt generates the types. If you create a composable without having the dev server running, typescript will throw an error `Cannot find name 'useBar'.`

## Usage

**Method 1:** Using named export

```js [composables/useFoo.ts]
export const useFoo = () => {
  return useState('foo', () => 'bar')
}
```

**Method 2:** Using default export

```js [composables/use-foo.ts or composables/useFoo.ts]
// It will be available as useFoo() (camelCase of file name without extension)
export default function () {
  return useState('foo', () => 'bar')
}
```

**Usage:** You can now use auto imported composable in `.js`, `.ts` and `.vue` files

```vue [app.vue]
<template>
  <div>
    {{ foo }}
  </div>
</template>

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

:LinkExample{link="/examples/auto-imports/composables"}

## Examples

### Nested Composables

You can use a composable within another composable using auto imports:

```js [composables/test.ts]
export const useFoo = () => {
  const nuxtApp = useNuxtApp()
  const bar = useBar()
}
```

### Access plugin injections

You can access [plugin injections](/guide/directory-structure/plugins#automatically-providing-helpers) from composables:

```js [composables/test.ts]
export const useHello = () => {
  const nuxtApp = useNuxtApp()
  return nuxtApp.$hello
}
```

## How Files Are Scanned

Nuxt only scans files at the top level of the `composables/` directory, e.g.:

```bash
composables
 | - index.ts // scanned
 | - useFoo.ts // scanned
 | - nested
 | --- utils.ts // not scanned
```

Only `composables/index.ts` and `composables/useFoo.ts` would be searched for imports.

To get auto imports working for nested modules, you could either re-export them (recommended) or configure the scanner to include nested directories:

**Example:** Re-export the composables you need from the `composables/index.ts` file:

```ts [composables/index.ts]
// Enables auto import for this export
export { utils } from './nested/utils.ts'
```

**Example:** Scan nested directories inside the `composables/` folder:

```ts [nuxt.config.ts]
export default defineNuxtConfig({
  imports: {
    dirs: [
      // Scan top-level modules
      'composables',
      // ... or scan modules nested one level deep with a specific name and file extension
      'composables/*/index.{ts,js,mjs,mts}',
      // ... or scan all modules within given directory
      'composables/**'
    ]
  }
})
```