关于闭合浮动元素(clearing float)的方法现在已经很多了,你还不了解的话去old9的blog看看,有一篇闭合浮动元素。
这些方法我最喜欢就是 使用:after 伪类动态的嵌入一个用于清除浮动的元素,可惜代码量太大了,看着不够简洁。现在我看到有个方法超级简单。赶紧介绍一下。
原理是这样的,外围元素之所以不能很好的延伸,问题出在了overflow上,因为overflow不可见。见W3C的解释:
In addition, if the element has any floating descendants whose bottom margin edge is below the bottom, then the height is increased to include those edges. Only floats that are children of the element itself or of descendants in the normal flow are taken into account, e.g., floats inside absolutely positioned descendants or oth...[ 查看全文 ]