The gripe is not that default behavior exists. The gripe is that, once you have made an element draggable, you need to override a few seemingly-unrelated defau

The gripe is not that default behavior exists. The gripe is that, once you have made an element draggable, you need to override a few seemingly-unrelated default behaviors in order to implement the most obvious form of drag-and-drop. Or, more precisely: you need to turn off not one, but two "drag" defaults in order to react to "drop" events.