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子元素增加margin-top会增加给父元素的问题_html/css_WEB-ITnose

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Release: 2016-06-24 11:29:33
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假设我们有如下代码

  


    

  

会发现效果如下所示

子元素的margin-top并没有使子元素与父元素分开,反倒效果等同于给父元素加了一个margin-top;

解决的方法也有,具体为:

1.修改父元素的高度,增加padding-top样式模拟(padding-top:1px;)

2.为父元素添加overflow:hidden;

3.为父元素或者子元素生命元素浮动(float:left;可用但是不推荐)

4.为父元素添加border(border:1px solid transparent)

5.为父元素或者子元素声明绝对定位

6.给父元素增加内容生成#father:before{content:' ';display:table};

source:php.cn
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