Post

Wish <div> was a valid descendant of <ul> (like in <dl>), so it could be simple to polyfill this in for older browsers (by creating a bunch of wrapping flex containers with even-numbered elements)

Why not use li?

Well, then I would need to do this: <ul> <li role="presentation"> <ul role="presentation"> <li>1</li> <li>2</li> </ul> </li> <li role="presentation"> <ul role="presentation"> <li>3</li> <li>4</li> </ul> </li> </ul> Which personally feels weird even if it's technically fine