[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) › CreateMessageChannel

```ts
type CreateMessageChannel = <Input, Output>() => MessageChannel<Input, Output>;
```

Defined in: [packages/common/src/Worker.ts:172](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Worker.ts#L172)

Factory function to create a [MessageChannel](https://evolu.dev/docs/api-reference/common/Worker/interfaces/MessageChannel).