[6.2b] ReferenceError React is not defined

[phaistonian]

It seems, at least in my case, that the JSX transform is either ignored or not working (anymore?).

This Reference Error React is not defined comes up when removing React from the import.

Tried hard to pinpoint to issue, but I failed to.

Any ideas or pointers?:)

[shilman]

Do you have a repro repo you can share?

[phaistonian]

@shilman I am afraid not since it's a (huge) private repo.

My guess is that somehow my custom webpack config is causing this, however, all I have tried has failed.

Will get back to you with any additional findings, if any.

[phaistonian]

It turns out the issue was a side-effect of me using esbuild (custom webpack config) before. babel-loader.

config.plugins.push(new webpack.ProvidePlugin({
  'React': 'react',
}));

fixed it.