[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:96](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Worker.ts#L96)

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.