> What's the difference between polyfill or some framework, and something like Qt or SDL? As a user, I usually can't even tell when they're using a polyfill on

> What's the difference between polyfill or some framework, and something like Qt or SDL? As a user, I usually can't even tell when they're using a polyfill on the web (except when they stop, like GitHub did with type=date). (As a developer, I often can't tell the difference, either. Some of them are that good!) So long as you generate HTML/CSS/JS, it doesn't matter to me how you do it. That's as 'native' to the web as you can get. I can spot Qt a mile away. A lot of the visuals look wrong and a lot of the controls don't behave right. It's frustrating to use, and I always slow way down and double-check my work because, e.g., popup menus show the 'accept' animation even when you cancel them.