有这个问题刚才 - 这是一个Chrome bug，你不能在dragStart事件中操纵DOM，否则dragEnd会立即触发。对我而言，解决方案是使用setTimeout（）并在超时功能内操作DOM。

Had this problem just now - it is a Chrome bug, you must not manipulate the DOM in dragStart event, or else dragEnd fires immediately. The solution for me turned out to be - use setTimeout() and manipulate the DOM inside the function you timeout.