方法一：浮动法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>CSS实现三栏布局——float</title>
<style type="text/css">
body {
margin: 0;
padding: 0;
}
.container{
overflow: auto;
}
.left{
width: 200px;
height: 200px;
background: red;
float: left;
}
.middle{
height: 200px;
background: yellow;
}
.right{
width: 200px;
height: 200px;
background: blue;
float: right;
}
</style>
</head>
<body>
<div class="container">
<div class="left">左栏</div>
<div class="right">右栏</div>
<div class="middle">中间栏</div>
</div>
</body>
</html>
优化版：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>CSS实现三栏布局——float</title>
<style type="text/css">
body {
margin: 0;
padding: 0;
}
.container > div{
float: left;
height: 200px;
}
.left{
width: 200px;
background: red;
margin-left: -100%;
}
.middle{
width: 100%;
background: yellow;
box-sizing: border-box;
padding: 0 200px;
}
.right{
width: 200px;
background: blue;
margin-left: -200px;
}
</style>
</head>
<body>
<div class="container">
<div class="middle">中间栏</div>
<div class="left">左栏</div>
<div class="right">右栏</div>
</div>
</body>
</html>
方法二：绝对定位法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>CSS实现三栏布局——Position</title>
<style type="text/css">
body {
margin: 0;
padding: 0;
}
.container {
position: relative;
}
.left {
width: 200px;
height: 200px;
background: red;
position: absolute;
top: 0;
left: 0;
}
.middle {
height: 200px;
background: yellow;
margin-left: 200px;
}
.right {
width: 200px;
height: 200px;
background: blue;
position: absolute;
top: 0;
right: 0;
}
</style>
</head>
<body>
<div class="container">
<div class="middle">中间栏</div>
<div class="left">左栏</div>
<div class="right">右栏</div>
</div>
</body>
</html>
方法三：Flex
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>CSS实现三栏布局——Flex</title>
<style type="text/css">
body {
margin: 0;
padding: 0;
}
.container {
display: flex;
}
.left {
width: 200px;
height: 200px;
background: red;
}
.middle {
height: 200px;
background: yellow;
flex: auto;
}
.right {
width: 200px;
height: 200px;
background: blue;
}
</style>
</head>
<body>
<div class="container">
<div class="left">左栏</div>
<div class="middle">中间栏</div>
<div class="right">右栏</div>
</div>
</body>
</html>
方法四：Grid
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>CSS实现三栏布局——Grid</title>
<style type="text/css">
body {
margin: 0;
padding: 0;
}
.container {
height: 200px;
display: grid;
grid-template-columns: 200px 1fr 200px;
}
.left {
background: red;
}
.middle {
background: yellow;
}
.right {
background: blue;
}
</style>
</head>
<body>
<div class="container">
<div class="left">左栏</div>
<div class="right">右栏</div>
<div class="middle">中间栏</div>
</div>
</body>
</html>
