title: HTML5 drop event child prevented
body: <p>I using HTML5 D&amp;D. I have one "parent" drop area, e.g. "parent".
  In that parent I drop my childs, e.g. "child". Each dropped child become also dropped area, e.g. it could accept D&amp;D events.</p>
  
  <p>If I dragging something over "parent" area, it highlighted, same for the "child" areas.
  But I face issue, that "drop" event, fires from "parent" area. If I dragging something over a "child" area, "dragenter", "dragleave" work fine.
  But "drop" event doesn't fire. Instead, "parent" area fire it.</p>
  
  <p>I resolve this issue with unbing in that moment "drop" event from "parent" area, but it's not a solution.</p>
  
  <p>How I could fix it in normal way?</p>