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实例演示如何消除子元素浮动造成父元素高度折叠的影响
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>消除子元素浮动造成父元素高度折叠的影响</title>
<style>
.box {
width: 200px;
border: 5px dashed blue;
overflow: hidden;
}
.box1 {
width: 200px;
height: 200px;
background: lightgreen;
float: left;
}
</style>
</head>
<body>
<div class="box">
<div class="box1"></div>
</div>
</body>
</html>点击 "运行实例" 按钮查看在线实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>绝对定位布局</title>
<style>
.box {
width: 1000px;
margin: 0 auto;
}
.header {
width: 100%;
height: 50px;
background: lightgrey;
}
.footer {
width: 100%;
height: 50px;
background: lightgrey;
}
.main {
background: lightblue;
margin: 5px auto;
position: relative;
}
.left {
width: 200px;
background: lightpink;
min-height: 800px;
position: absolute;
left: 0;
top: 0;
}
.right {
width: 200px;
background: yellow;
min-height: 800px;
position: absolute;
right: 0;
top: 0;
}
.content {
min-height: 800px;
background: lightseagreen;
margin-left: 200px;
margin-right: 200px;
}
</style>
</head>
<body>
<div class="box">
<div class="header">网页头部</div>
<div class="main">
<div class="left">左边</div>
<div class="content">中间</div>
<div class="right">右边</div>
</div>
<div class="footer">网页尾部</div>
</div>
</body>
</html>点击 "运行实例" 按钮查看在线实例
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>浮动布局</title>
<style>
.box {
width: 1000px;
margin: 0 auto;
}
.header {
width: 100%;
height: 50px;
background: lightgrey;
}
.footer {
width: 100%;
height: 50px;
background: lightgrey;
}
.main {
background: lightblue;
margin: 5px auto;
position: relative;
overflow: hidden;
}
.left {
background: lightcoral;
width: 200px;
min-height: 800px;
float: left;
}
.right {
background: lightseagreen;
width: 200px;
min-height: 800px;
float: right;
}
.content {
background: yellow;
width: 600px;
min-height: 800px;
float: left;
}
</style>
</head>
<body>
<div class="box">
<div class="header">网页头部</div>
<div class="main">
<div class="left">左边</div>
<div class="content">中间</div>
<div class="right">右边</div>
</div>
<div class="footer">网页尾部</div>
</div>
</body>
</html>点击 "运行实例" 按钮查看在线实例
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