Since it seems that you're trying to absolutely position the elements with left: 0; right: 0; then you'll need to add.
position: absolute;
Then you can start to see what you're playing with... Beyond that... I can't really decipher what you're trying to do aside from display the css you're working with.
发布评论
评论（2）
因为您似乎正在尝试使用
left: 0; 绝对定位元素。 right: 0;那么你需要添加。然后你可以开始看看你正在玩什么......除此之外......除了显示你正在使用的CSS之外，我无法真正破译你想要做什么。
http://jsfiddle.net/DCDVM/2/
Since it seems that you're trying to absolutely position the elements with
left: 0; right: 0;then you'll need to add.Then you can start to see what you're playing with... Beyond that... I can't really decipher what you're trying to do aside from display the css you're working with.
http://jsfiddle.net/DCDVM/2/
您尚未为这些伪元素指定任何维度（在该上下文中）。这就是为什么他们没有出现。
对于具有
position: static（默认值）的元素，top和left将被忽略。jsFiddle。
You haven't specified any dimensions (in that context) for those pseudo-elements. That's why they don't appear.
topandleftare ignored for elements withposition: static(the default).jsFiddle.