Do you mean making Merlin works in a Js_of_ocaml environment? I am not familiar with JS programming model, but I think it should be possible to turn Merlin int

Do you mean making Merlin works in a Js_of_ocaml environment? I am not familiar with JS programming model, but I think it should be possible to turn Merlin into a worker and have synchronous loading of "cmi" files via some service (I don't want to do control inversion on the whole typechecker :)).