css parent元素出现在child上面
问题描述：
我有2个嵌套的css元素。我需要得到父元素在顶部，即在z轴上的子元素。只是设置z-index是不够的。我如何做到这一点？感谢。
I have 2 nested css elements. I need to get the parent to be on top, that is, above in z-axis, of the child element. Just setting z-index is not sufficient. How do I do this? Thanks.
编辑：我无法在子级上设置负z-index，将其设置在我实际的页面容器下页。这是唯一的方法吗？
I can't set a negative z-index on the child, that'll set it to below the page container on my actual page. Is this the only method?
Edit2：更新示例以设置位置：绝对;
Updated example to set both on position:absolute;
答
为子项设置一个负值 z-index ，并删除父项上设置的值。
Set a negative z-index for the child, and remove the one set on the parent.