---
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/a5aec1c5527715db4de0147b90c5aed61e257b97/src/features/output.ts#L27)

## Parameters

### context

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

## Returns

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