[mst]

If it's any help, here's a lit+svg web component I did as a learning exercise: http://hermit1.scsys.co.uk/~matthewt/clock/t8b.html

Given JS imports are direct references, you can export a 'let' from a module and if it's modified by the module the importing thing will see the change (though it isn't allowed to set the value) ... though of course you want to be able to have more than one set of state, so that's probably not applicable here, paragraph left for the interested.

But. It seems like you could have the template logic in svelte style and lit style and share basically everything else easily enough if you wanted to. Not sure that's the best way to refactor, just mentioning.

Very neat piece of code though, I'm not sure I have any idea when I'd use it but I definitely intend to go back to the code to learn more about doing cool things with d3. Cheers!