[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Worker](https://evolu.dev/docs/api-reference/common/Worker) › Transferable

```ts
type Transferable = NativeMessagePort<any, any> | ArrayBuffer;
```

Defined in: [packages/common/src/Worker.ts:101](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Worker.ts#L101)

Objects whose ownership can be transferred between threads via `postMessage`.

Intentionally scoped to types Evolu uses. The web platform defines additional
transferable types (`ImageBitmap`, `OffscreenCanvas`, `ReadableStream`, etc.)
that can be added here if needed.