Initial drag event triggered on draggable even if mouse not moved

If you specify a handler for the drag property of a draggable element, and click on the element without moving the mouse, a drag event is triggered. Subsequent drag events are only triggered if the mouse moves.

I think the drag handler should only be triggered after the mouse has been moved. I don't think a draggable needs an initial drag event to signal a potential move: the start event does that already.

If start stays as-is, and drag changes as I have described, then scripts can take initial "element might move" actions upon a start event, and take "element has actually moved" actions upon a drag event. As it stands now, scripts would have to compare coordinates to determine whether a move has taken place, and based on application circumstances, that may or may not be easy.