Ruxp badly mangles the use of spectrum.

[vamitul]

Here is a minimal repo to replicate:
https://github.com/vamitul/swc-ruxp-issue

To use spectrum web components and their react wrappers, the theme fragments must be imported:
import '@spectrum-web-components/theme/theme-light.js';

[cAttte]

hi there, sorry for not seeing this earlier. i've gotten your repo working, and just to be clear: the issue is that SWC styles aren't applied to the components, right? i sadly don't have time right now to set up a vanilla plug-in in order to compare its output to that of your SWC repo, so i can't really investigate much. have you been able to fix this, or at least get a lead on why it's happening? i would appreciate any other details you could have, thank you very much!

[vamitul]

Yes, the styles are not applied. No idea why, in the end I just gave up on RUXP for now.
Best as I can tell, the required CSS for Spectrum gets removed somehow. Sorry I can't be more of use.