Make it possible to replace IO funcs of JS
Make it possible to replace IO funcs of JS

shinh/elvm,shinh/elvm,ND-CSE-30151/elvm,shinh/elvm,shinh/elvm,shinh/elvm,shinh/elvm,shinh/elvm,ND-CSE-30151/elvm,shinh/elvm,ND-CSE-30151/elvm