One big reason I often go with HTML rather than any kind of actual UI framework, especially for prototypes or ad-hoc interfaces, is that's it makes it so much e

One big reason I often go with HTML rather than any kind of actual UI framework, especially for prototypes or ad-hoc interfaces, is that's it makes it so much easier to do dumb things that weren't intended, aren't versitile or accessible, but I don't care. I can put a div in a div, border-radius=50%, position=relative,absolute, add a single event handler and that's a digital joystick. Run a local single-exe websocketify and you can control anything from a CNC router to an army of drones. I dislike Electron* as much as the next guy and steer clear of npm like my life depends on it, but there's no single thing that's more universal and easy to hack on than a simple HTML file.