需求：实现两侧大小固定，中间自适应
效果图如下：
1. 圣杯布局
html代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>圣杯布局</title>
<style>
* {
padding: 0;
margin: 0;
}
.box {
padding: 0 200px;
}
.left,.right {
background-color: pink;
width: 200px;
height: 200px;
}
.center {
width: 100%;
height: 500px;
background-color: orange;
}
.left, .center, .right {
float: left;
position: relative;
}
.left {
margin-left: -100%;
left: -200px;
}
.right {
margin-left: -200px;
left: 200px;
}
</style>
</head>
<body>
<div class="box">
<div class="center">center</div>
<div class="left">left</div>
<div class="right">right</div>
</div>
</body>
</html>
2. 双飞翼布局
html代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>双飞翼布局</title>
<style>
* {
padding: 0;
margin: 0;
}
.left, .main, .right {
float: left;
}
.left {
margin-left: -100%;
}
.right {
margin-left: -200px;
}
.left, .right {
width: 200px;
height: 200px;
background-color: pink;
}
.main {
width: 100%;
}
.content {
margin: 0 200px;
height: 400px;
background-color: orange;
}
</style>
</head>
<body>
<div class="box">
<div class="main">
<div class="content">
main
</div>
</div>
<div class="left">left</div>
<div class="right">right</div>
</div>
</body>
</html>
3. flex布局
html代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>flex</title>
<style>
* {
padding: 0;
margin: 0;
}
.container {
display: flex;
}
.left, .right {
width: 200px;
height: 200px;
background-color: pink;
}
.center {
flex: 1;
height: 400px;
background-color: orange;
}
</style>
</head>
<body>
<div class="container">
<div class="left">left</div>
<div class="center">center</div>
<div class="right">right</div>
</div>
</body>
</html>
4. 左右定位
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>定位+float</title>
<style>
* {
padding: 0;
margin: 0;
}
/* 清除浮动 */
.container {
position: relative;
}
.left, .right {
position: absolute;
top: 0;
width: 200px;
height: 200px;
background-color: pink;
}
.left {
left: 0;
}
.right {
right: 0;
}
.center {
margin: 0 200px;
height: 400px;
background-color: orange;
}
</style>
</head>
<body>
<div class="container">
<div class="left">left</div>
<div class="center">center</div>
<div class="right">right</div>
</div>
</body>
</html>
