elm is a good example here - there is no ffi for somewhat similar reasons (specifically, that it can make safety guarantees about not crashing at run-time if yo

elm is a good example here - there is no ffi for somewhat similar reasons (specifically, that it can make safety guarantees about not crashing at run-time if you don't allow arbitrary javascript code to be called), and that has both helped write reliable code, and hindered it's usefulness in larger applications that have to play with the existing world of js libraries and components