Yeah, so some syntactic rules (using Array.forEach() instead of for(;;) loops) and prohibiting some of Javascript's more dynamic features might be enough to ren

Yeah, so some syntactic rules (using Array.forEach() instead of for(;;) loops) and prohibiting some of Javascript's more dynamic features might be enough to render the language non-Turing complete. It would also -- and this is kind of the point -- render the language unable to perform certain computations that plain vanilla Javascript can perform.