Sure, but the language that _every_ developer will need to know is JavaScript, not OCaml or some other of the dozen alternatives that can be compiled to JS.
Besides, the ability to compile to JS is not enough; you will need to read it in JS, debug it in JS and let other developers work on it in JS (because they don't know OCaml).
Besides, the ability to compile to JS is not enough; you will need to read it in JS, debug it in JS and let other developers work on it in JS (because they don't know OCaml).