$RefreshReg$ injected into worker files

[d07RiV]

I have a React project with a worker, and sometimes things like $RefreshReg$ calls end up in worker code, which breaks it.

If there was a way to control that, that would be fine, but the rules seem to be very arbitrary. For instance, the problem occurs if a function name starts with uppercase (and the module otherwise has nothing to do with React, no imports at all), but renaming it to lowercase fixes it?

[pmmmwh]

Hi, $RefreshReg$ is injected by the react-refresh/babel. If you do not process your worker with the plugin, it should not trigger the transform.

If there was a way to control that, that would be fine, but the rules seem to be very arbitrary. For instance, the problem occurs if a function name starts with uppercase (and the module otherwise has nothing to do with React, no imports at all), but renaming it to lowercase fixes it?

Yes, that's how "components" are determined in the Babel plugin.