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1.深入理解盒子模型_html/css_WEB-ITnose

WBOY
Release： 2016-06-24 11:33:08
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盒子模型

1.盒子模型的组成：margin border padding content；

2.border: 

　　在属性值的设置中，如果给出2个属性值，前者表示上下边框的属性，后者表示左右边框的属性；如果给出3个属性值，前者表示上边框，中间表示左右边框，后者表示下边框；如果给出4个属性值，按照上，右，下，左的顺序。设置背景的时候，浏览器覆盖的区域是content,padding,border。

2.margin：

　　1）需要记录的是水平的margin是相加，垂直方向的margin会造成塌陷，采用较大的margin。

　　2）嵌套盒子的margin：子块会以父块的content为参考。

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