[API reference](https://evolu.dev/docs/api-reference) › [@evolu/web](https://evolu.dev/docs/api-reference/web) › createSharedWorker

```ts
function createSharedWorker<Input, Output>(
  nativeSharedWorker: SharedWorker,
): SharedWorker<Input, Output>;
```

Defined in: [Worker.ts:60](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/web/src/Worker.ts#L60)

Creates a [SharedWorker](https://evolu.dev/docs/api-reference/common/Worker/interfaces/SharedWorker) from a Web SharedWorker.

Call [installOneTabSharedWorkerPolyfill](https://evolu.dev/docs/api-reference/web/functions/installOneTabSharedWorkerPolyfill) first to support browsers
without native SharedWorker support.