如何理解这段代码中absolute对<div>百分百宽度的影响？
在.container中添加position: relative;之后
在.container中删除position: relative;之后
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
*{margin: 0px;
padding: 0px;}
html,body {
height: 100%;
background-color: #00FFFF;
}
.header{background-color: #000;
width: 100%;
height: 100px;
}
.header ul {
float: right;
display: inline-block;
line-height: 100px;
color: #fff;
font-size: 20px;
margin: 0;
}
.header ul li{display: inline-block;
margin: 0 20px;}
.container{
position: relative;
margin: 0 auto;
background-color: #FFF;
height: 100%;
width:80%;
padding-top: 500px;
}
.a{height: 200px;width:50%;
background-color: yellow;
position: absolute;
}
.b{height: 200px;width:50%;
background-color: red;
position: absolute;
right: 0;}
.foot{
position: relative;
background-color: #000;
bottom: 0px;
height: 100px;
width: 100%}
.foot ul{color: #fff;
display: block;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
margin: auto;
}
.foot ul li{
display: inline-block;
}
</style>
</head>
<body>
<div class="header">
<img src="http://climg.mukewang.com/58c0d2d900016ce303000100.png" alt="">
<ul>
<li>牛</li>
<li>牛</li>
<li>牛</li>
<li>牛牛</li>
<li>牛</li>
</ul>
</div>
<div class="container">
<div class="a"></div>
<div class="b"></div>
</div>
<div class="foot">
<ul>
<li>牛</li>
<li>牛</li>
<li>牛</li>
<li>牛牛</li>
<li>牛</li>
</ul>
</div>
</body>
</html>
Secret_170回答
-
慕斯4360584
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
神思夜语
absolute 是脱离文档流定位方式，在父级元素添加relative相对定位方式，absolute脱离文档流就会相对与父级元素脱离，脱离后的元素位置和大小都在父级元素内
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