In my experience, that's not how design works. You don't "start" with any design. Eventually you whittle your way through a bunch (100s?) of bad designs to some

In my experience, that's not how design works. You don't "start" with any design. Eventually you whittle your way through a bunch (100s?) of bad designs to something you want to spend the effort to perfect. And at this point, I agree. If you know how to code you can use the principles of practicality to guide your final decision to a design that fits the medium. But I'm always starting with pen and paper drawing things that could never exist in your browser. I think it's integral.