html页面三列布局左右绝对定位中间自适应
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>三列布局左右绝对定位中间自适应</title>
<style type="text/css">
body { /*初始样式。用于相对定位relative*/
margin: 0;
padding: 0;
}
.container {
position: absolute; /*设置绝对定位时必须要设置左右两边顶点*/
left: 0;
right: 0;
}
.left {
position: absolute; /*绝对定位*/
top: 0;
left: 0;
width: 200px;
height: 600px;
background-color: red;
}
.right {
position: absolute; /*绝对定位*/
top: 0;
right: 0;
width: 200px;
height: 600px;
background-color: yellow;
}
.main {
height: 600px;
margin-left: 200px;
margin-right: 200px;
background-color: blue;
}
</style>
</head>
<body>
<h2></h2>
<p>1.左右两列采用约定定位布局<br>
2.中间内容不更采用margin挤压出来
</p>
<div class="container">
<div class="left">左侧</div>
<div class="right">右侧</div>
<div class="main">主体</div>
</div>
</body>
</html>