Nice to know

[barak007]

1. https://github.com/tc39/proposal-realms
2. https://github.com/ampproject/worker-dom
3. https://github.com/neomjs/neo

Not sure if you familiar with these ideas seems related.

[yoavaa]

The first looks dead

The second, while looking very promising, has some key issues

1. is has a long list of not implemented DOM APIs - https://github.com/ampproject/worker-dom/blob/main/web_compat_table.md
2. it loads an additional library in the worker which may be large

still, it looks very promising

the last, neomjs, looks very impressive. The code that you type there looks very verbose, still very impressive.