实现两边定宽,中间自适应
1.圣杯布局
首先html结构如下
<!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>圣杯布局</title>
</head>
<body>
<div class="content">
<div class="middle">2111111111111</div>
<div class="left">left</div>
<div class="right">right</div>
</div>
</body>
</html>
css部分
<style>
*{
margin: 0;
padding: 0;
}
.middle{
background: pink;
width: 100%;
}
.left{
background: blueviolet;
width: 200px;
}
.right{
background: blanchedalmond;
width: 200px;
}
.middle,.left,.right{
height: 100px;
}
</style>
效果如下图,现在我们要让left,和right悬浮在middle两侧
我们给middle、left、right都设置float:left,left让它悬浮在左侧设置margin-left:-100%(负的中间元素的宽度),right让它悬浮在右侧设置margin-right:-200px(负的自身的宽度)现在效果如下:
.left{
margin-left:-100%;
}
.right{
margin-left:-200px;
}
.left,right,.middle{
float:left;
}
现在要解决的是中间部分被left遮挡住了
给.content设置padding左右两边的.left、.right宽度, .left、.right设置相对定位
.content{
padding:0 200px;
}
.left,.right{
position:relative;
}
.left{
left:-200px;
}
.right{
right:-200px;
}
这样可以实现两边定宽,中间自适应完整代码
<!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>圣杯布局</title>
<style>
*{
margin: 0;
padding: 0;
}
.content{
padding: 0 200px;
}
.middle{
background: pink;
width: 100%;
}
.left{
background: blueviolet;
width: 200px;
margin-left: -100%;
left: -200px;
}
.right{
background: blanchedalmond;
width: 200px;
margin-left: -200px;
right: -200px;
}
.middle,.left,.right{
height: 100px;
float: left;
position: relative;
}
</style>
</head>
<body>
<div class="content">
<div class="middle">2111111111111</div>
<div class="left">left</div>
<div class="right">right</div>
</div>
</body>
</html>
效果图如下:
2.双飞翼布局
html结构如下
<div class="content">
<div class="middle"><div>211111111</div></div>
<div class="left">left</div>
<div class="right">right</div>
</div>
css
.middle{
width: 100%;
background: paleturquoise;
height: 200px;
float: left;
}
.middle div{/*就是在middle里面添加div设置margin值实现中间自适应*/
margin-left: 200px;
margin-right: 200px;
}
.left{
background: palevioletred;
width: 200px;
height: 200px;
float: left;
font-size: 40px;
color: #fff;
margin-left:-100%;
}
.right{
width: 200px;
height: 200px;
background: purple;
font-size: 40px;
float: left;
color: #fff;
margin-left:-200px;
}
完整代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>双飞翼布局</title>
<style>
* {
margin: 0;
padding: 0;
}
.middle {
width: 100%;
background: paleturquoise;
height: 200px;
float: left;
}
.middle div {
margin-left: 200px;
margin-right: 200px;
}
.left {
background: palevioletred;
width: 200px;
height: 200px;
float: left;
font-size: 40px;
color: #fff;
margin-left: -100%;
}
.right {
width: 200px;
height: 200px;
background: purple;
font-size: 40px;
float: left;
color: #fff;
margin-left: -200px;
}
</style>
</head>
<body>
<div class="content">
<div class="middle">
<div>211111111</div>
</div>
<div class="left">left</div>
<div class="right">right</div>
</div>
</body>
</html>
圣杯布局,双飞翼布局的区别
都是两边定宽,中间自适应中间部分放在文档流前面,全部都是设置float:left,区别在于中间部分不被遮挡。双飞翼布局middle里面添加div设置左右的margin值
弹性盒布局
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>弹性盒子</title>
<style>
*{
margin: 0;
padding: 0;
}
body,html{
display: flex;
width: 100%;
}
.content{
display: flex;
height: 200px;
width: 100%;
}
.left{
background: blueviolet;
height: 200px;
}
.middle{
background: yellow;
flex: 1;
}
.right{
background: orange;
height: 200px;
}
.left,.right{
width: 200px;
}
</style>
</head>
<body>
<div class="content">
<div class="left"></div>
<div class="middle">11111111</div>
<div class="right"></div>
</div>
</body>
</html>
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