I started working on import attributes, which IIRC is a pre-requisite for this, before the Xmas break. I hope to get back to it soon!

I wrote a custom patch for this a while ago, hopefully I can find it in my backups, I probably didn't implement it really well as it used a JSValue for data after with statement

it still may be worth it to look at(?)

Sure thing, send it over if you can find it!

Couldn't find it unfortunately, I could only find a bit of chat with my friend and bit of scraps of the patch, but not much I'm afraid

could in theory quickly write it again if I can remember how I did it

I have managed to write the patch again, not really an equivalent to the previous one as I have decided to not introduce many/any breaking changes, couldn't upload the patch in the issue as GitHub has issues with it on Linux, so I have made GitHub gist instead:
https://gist.github.com/LowByteFox/7e651cc624f05b65ef2e8614292f9069

Haven't tested it for leaks yet, if there are any possible improvements, I'll be glad to implement them. I have gotten an idea to implement support for JSON modules in quickjs-libc.c unless desired somewhere else, then could make a PR

Very useful, I'll take a look! Or would you rather send it as a PR, enable 262 tests and handle feedback like so?

That would work, should I also implement JSON modules while at it? Reaction is enough