It depends upon what kind of code you develop. If you do any front end work you really do need to code it from scratch. If you do back end or native client deve

It depends upon what kind of code you develop. If you do any front end work you really do need to code it from scratch. If you do back end or native client development you don't need to showcase your javascript and css3 skills so you could get away with anything you like that works for you. But if you touch front end web development or want to be involved it really sets you back to not have some kind of examples of your work that are your own original work.