The spec says in many places that keydown may have associated activation behaviors while explicitly saying the default action of keyup is none ([1], [2], [3]).
However, this is not true in reality. In most OSs/UAs, [Space] keyup, instead of [Space] keydown, triggers click for <button> elements. I think the spec may need to be updated to be consistent with reality.
The spec says in many places that
keydownmay have associated activation behaviors while explicitly saying the default action ofkeyupis none ([1], [2], [3]).However, this is not true in reality. In most OSs/UAs, [Space]
keyup, instead of [Space]keydown, triggersclickfor<button>elements. I think the spec may need to be updated to be consistent with reality.