React 16.14.0

[t2ca]

I cannot build my site without getting errors ever since the release of React 16.14 which has added support for the new JSX transform. This is the same error that we had when upgrading to React17 #1160

edit: I was able to get it working again after downgrading gatsby-plugin-theme-ui back to v0.3.0

edit2: After going back to v0.3.0, I was able to upgrade to 0.4.0-rc.5 and it would keep working without any errors until I upgraded some other packages and the error would show up again. So each time i see the error, I will just install v0.3.0 followed by 0.4.0-rc.5.

edit3: I forgot to mention that i also had to change react and react-dom to 16.13.1

[atanasster]

I believe this also waits on the emotion update - maybe close this issue as dupe?

[lachlanjc]

@hasparus Duplicate of Emotion 11/React 17 Runtime support, we can close

[chenrui333]

@lachlanjc, 👋 can you attach the link for Emotion 11/React 17 Runtime support (I am also looking for the React 17 compatibility support)? Thanks!

[lachlanjc]

That would be #1237!

[chenrui333]

Ah, so this is already done. That is awesome! 🎉

[hasparus]

@chenrui333 it's not yet in stable release.

BTW React 17 was always working -- it was just the automatic runtime support and people were surprised by the change of defaults in CRA.

You can still use the classic JSX runtime (if you can configure your Babel config) with React 17, so even the oldest versions of Theme UI should work.