[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) › createMessagePort

```ts
const createMessagePort: CreateMessagePort;
```

Defined in: [packages/common/src/Worker.ts:390](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Worker.ts#L390)

Creates an in-memory [MessagePort](https://evolu.dev/docs/api-reference/common/Worker/interfaces/MessagePort) from a native token.

This is a memory-only fallback for platforms without native MessagePort
support. Message delivery through returned ports is asynchronous in-process.