react-native support

[tyrauber]

I am interested in exploring the use valtio in react-native and expo, using valitio-yjs and y-websocket. I've started by porting the valtio-yjs-demo to react-native. Here is a an expo snack for the purpose of developing and testing the implementation.

Unfortunately, there are some issues with importing yjs in react-native, specifically related to the dependency lib0. I believe this is an issue upstream in yjs or lib0, but I thought I'd report it here first as it pertains to the valtio-yjs example.

The snack fails to resolve yjs as a dependency due to lib0:

Failed to resolve dependency 'yjs@^13.5.24' (export 'Observable' (imported as 'Observable') was not found in 'lib0/observable' (module has no exports)

If you download the example and run it locally, the metro.config.js file, when configured to resolve .mjs and .cjs files, successfully imports and runs in the web browser. But runs into some errors when trying to run it in the iOS simulator:

While trying to resolve module `isomorphic.js` from file `~/valtio-yjs-expo/node_modules/lib0/dist/random.cjs`, the package `~/valtio-yjs-expo/node_modules/isomorphic.js/package.json` was successfully found. However, this package itself specifies a `main` module field that could not be resolved (`~/valtio-yjs-expo/node_modules/isomorphic.js/browser.mjs`. Indeed, none of these files exist:

Steps to reproduce the issue:

1. Download the zip
2. install the dependencies yarn
3. run in the browser yarn web - success
4. run in the iOS simulator yarn ios - fail

[dai-shi]

Yeah, it sounds like upstream issues. Please report it there too.