There's also a well supported ML for the web from Facebook:
With React:
With React:
Somewhat unexpectedly, there is in fact already a very good SML-to-browser solution, namely the unfortunately named SMLtoJs: https://github.com/melsman/mlkit/blob/master/README_SMLTOJS....
It's from 2011 and so predates most other Javascript-targeting languages. It's unfortunate it never got any traction.
[0] https://github.com/SOSML/SOSML