Rob Hogan

Thanks for the reports all - if anyone is still seeing this issue, could you start Metro with `DEBUG=Metro:* yarn start` and let us know the output from Metro as...

Hi @JulienFremy - thanks for that, super helpful. The absence of a ["Using watcher:"](https://github.com/facebook/metro/blob/3050e277678c0e62c5afb40bd5f9108184ae2a23/packages/metro-file-map/src/Watcher.js#L188) log there is interesting and suggests `metro-file-map` isn't actually being initialised in watch mode. That comes...

Hi @thib-info, are you having the same experience as @ghostgarrix that a physical device works fine, but only simulators fail to fast refresh? If that's the case it points to...

Hi @Twiggeh - Metro generally transforms everything by default (it has to parse files to understand dependency relationships), so there’s no way to “include” something for transformation. Could you share...

@danielknell first, thanks! Worked a treat and seems like the most sensible+DRY way of handling craco configs. FYI: I'm using craco to customise `babel-loader` so that I can have TSX...

I don't know of anything existing that does this - I think the normal workflow is to lint and type check from the IDE, and then back that up with...

This should be fixed in `main` by https://github.com/facebook/react-native/commit/3e19c9764634049731b4bf96dc1c716064394d62. @cortinico, might be worth picking the Babel updates into 71? Edit: Thinking about it, the RN template dependencies shouldn’t be the immediate...

Changing `package.json` might not get what you want and shouldn't be necessary. The simplest thing to do, if you can, is to delete `yarn.lock` and `node_modules` and run `yarn` again.

Updating versions within your project's `package.json` will force an update to your top-level Babel but won't necessarily change the lockfile entry that locks Metro to a buggy version of Babel,...

From the React Native / Meta JS infra perspective this sounds fine to me too - indeed we use Hermes parser for Flow (almost) everywhere now.