Ability to set `useESModules` to `false`

[ivosabev]

It seems to me that there is no way in which this settings can be set to false? It could not be overwritten in a babel.config.js neither 😞

https://github.com/facebook/create-react-app/blob/f89385f7438f39750b762590ebd9729534e30190/packages/babel-preset-react-app/create.js#L143

[Timer]

We can take this as an option. May I ask your use case?

[Pajn]

I just hit on the same problem.

My use case is that I use a combined build process for everything for which babel-preset-react-app is the base but with additional plugins for things in the node environment. This has worked good previously but when I try to update to the new version I of course get syntax errors on the import syntax.

Being able to disable useESModules would really help me as I then can avoid forking babel-preset-react-app

[ivosabev]

I have the same use case as @Pajn, I am using the babel-preset-react-app as the babel config for helper libraries and my node servers. It used to work good before version 2.0. I have recently found another problem that is breaking:

https://github.com/facebook/create-react-app/blob/473fde0e1c5cca2c4c04f63b25348f6097ef4cc2/packages/babel-preset-react-app/create.js#L147

When I build my node server it includes absolute paths, which it shouldn't and there is no way to stop this.

I think the best solution would be if we can overwrite those settings, when using the babel-preset-recat-app package as a standalone babel preset. I have opened an issue with Babel about this, but they have not responded yet.

babel/babel#8799

[bugzpodder]

@ivosabev you can disable runtime path: #5443 (comment)

[stale]

This issue has been automatically marked as stale because it has not had any recent activity. It will be closed in 5 days if no further activity occurs.

[Timer]

PR up in #5487

[strayiker]

Can this option be applied to the env preset?
https://github.com/facebook/create-react-app/blob/013c8f2c733ef2022c138d69207297cc25a62d60/packages/babel-preset-react-app/create.js#L93-L94
This will allow us to transpile the whole CRA application code for ssr needs.
Also, it will be more obvious if useEsModules: false will be guaranty that transpiled code does not contains esm statements.

[Timer]

I don't see why not, send a PR?