quick question (and let me know if there's a better place for this) - where can I find info on the new/experimental javascript support?

There are no docs yet, as it's still in development. @worried-painter-31382 is working on it, but I believe he's on vacation at the moment.

There's a stabilization issue and a longer github discussion about js support. See https://pantsbuild.slack.com/archives/C0D7TNJHL/p1688677193888349?thread_ts=1688656711.278339&cid=C0D7TNJHL