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块套块的排版问题研究_html/css_WEB-ITnose

WBOY
Release： 2016-06-24 11:20:59
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div内嵌套p,div等元素出现的问题

文章内有些问题，可能不适应今天了。

正在学习前端，小问题是不能忽视的。

 1 <!DOCTYPE html> 2 <html> 3  <head> 4   <title> new document </title> 5   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 6   <style type="text/css"> 7     div {margin:0;padding:0;} 8      9     /*解决方案1？：加个border可以让外部div变大，但是border的1px，用margin=-1px消除不了        border:1px solid #000;margin:-1px;               */10     #top,#bottom {background:red;}11     #bottom{background:green;}12     13     p{margin:20px;}14     #div {margin:30px;}15     16     /* 此时margin为0，效果OK             */  17     /* 接下来先去掉p标签的margin:0;让前面的定义生效            18     p{margin:0px;}    */   19     #div {margin:0;}20     21     /*解决方案2：*/22     #top {  23     overflow:hidden; /* 针对FF，Opera有效 */  24     zoom:1; /* 对IE有效 */  25 }             26 27   </style>28  </head>29 30  <body>31  32   <div id="top">33     <p>p-tag margin</p>34   </div>35   36   <div id="bottom">37     <div id="div">div margin</div>38   </div>39   40  </body>41 </html>
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解决方案1是有问题的，margin:-1px;并不能解决高度增大问题，chrome,FF,Opara测试了下都不行。

解决方案2，可以完美解决（IE我没测试）。

 

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块套块的排版问题研究
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