You don't like Bonsai? Or do you just want something that doesn't "transpile" to JS at all?
DOM is not enough for that. You almost certainly would like to be able to communicate with your backend ;)
Here is a list of the "usual" web APIs: https://developer.mozilla.org/en-US/docs/Web/API And everything that needs network access or access to local resources (file system in the worst case) will never happen to WASM because of security considerations.
At least WASM will get DOM access (and hopefully access to similar web APIs) as soon as the GC is stable and usable.
Once GC is supported, WebAssembly code would be able to reference and access JavaScript, DOM, and general WebIDL-defined objects.
https://webassembly.org/docs/web/Personally I think that enforcing the SOP at all cost (and even when no cookies or other authentication headers are injected by the browser) is misguided at this point and holding back modern webapps.
DOM bindings in WASM would be awesome. I would be a happy nerd if I could do all of my web dev in OCaml.
In the meantime, WASM has real, just not for front end dev.
The two language problem is hardly unique to web dev. It’s also ubiquitous in the machine learning/data science space with Python and C/C++/CUDA playing the roles of JS and WASM, respectively.