Beads was going to be recoded in Web Assembly, however, the many restrictions on I/O to the user's hard drive inside the browser make it very to build a compiler inside a browser. Hopefully in the near future Web Assembly will become a fully capable virtual machine, that will unify all the different hardware and operating systems, effectively becoming a universal virtual OS.

But any day now the dam will break, and WebAssembly will get access to I/O and the full browser API (last time i checked web assembly runs on its own compute-only thread, and is not permitted direct access)