---
url: /reference/api/TypeAlias.OutExtensionFactory.md
---
# Type Alias: OutExtensionFactory

```ts
type OutExtensionFactory = (context) => OutExtensionObject | undefined
```

Defined in: [src/features/output.ts:27](https://github.com/rolldown/tsdown/blob/4e612b53c3ee410664a4a421e66c7f9ab70e15cc/src/features/output.ts#L27)

## Parameters

### context

[`OutExtensionContext`](Interface.OutExtensionContext.md)

## Returns

[`OutExtensionObject`](Interface.OutExtensionObject.md) | `undefined`