高度已知，左右定宽，中间自适应三栏布局的五种写法
1.使用浮动布局
<!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>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
.box>div{
height: 100px;
}
.box .left{
background-color: red;
width: 300px;
float: left;
}
.box .right{
background-color: blue;
width: 300px;
float: right;
}
.box .center{
text-align: center;
line-height: 100px;
color: #fff;
background-color: orange;
}
</style>
</head>
<body>
<div class="box">
<div class="left"></div>
<div class="right"></div>
<div class="center">第一种方法：浮动</div>
</div>
</body>
</html>
2.使用定位布局
<!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>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
.box>div{
height: 100px;
position: absolute;
}
.box .left{
background-color: red;
width: 300px;
left: 0;
}
.box .right{
background-color: blue;
width: 300px;
right: 0;
}
.box .center{
text-align: center;
line-height: 100px;
color: #fff;
background-color: orange;
left: 300px;
right: 300px;
}
</style>
</head>
<body>
<div class="box">
<div class="left"></div>
<div class="center">第二种方法：定位</div>
<div class="right"></div>
</div>
</body>
</html>
3.使用flex布局
<!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>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
.box{
display: flex;
}
.box>div{
height: 100px;
}
.box .left{
background-color: red;
width: 300px;
}
.box .right{
background-color: blue;
width: 300px;
}
.box .center{
text-align: center;
line-height: 100px;
color: #fff;
background-color: orange;
flex: 1;
}
</style>
</head>
<body>
<div class="box">
<div class="left"></div>
<div class="center">第三种方法：flexbox布局</div>
<div class="right"></div>
</div>
</body>
</html>
4.使用表格布局
<!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>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
.box{
display: table;
width: 100%;
height: 100px;
}
.box>div{
display: table-cell;
}
.box .left{
background-color: red;
width: 300px;
}
.box .right{
background-color: blue;
width: 300px;
}
.box .center{
text-align: center;
line-height: 100px;
color: #fff;
background-color: orange;
}
</style>
</head>
<body>
<div class="box">
<div class="left"></div>
<div class="center">第四种方法：表格布局</div>
<div class="right"></div>
</div>
</body>
</html>
5.使用网格布局
<!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>Document</title>
<style>
*{
margin: 0;
padding: 0;
}
.box{
display: grid;
width: 100%;
grid-template-rows: 100px;
grid-template-columns: 300px auto 300px;
}
.box .left{
background-color: red;
}
.box .right{
background-color: blue;
}
.box .center{
text-align: center;
line-height: 100px;
color: #fff;
background-color: orange;
}
</style>
</head>
<body>
<div class="box">
<div class="left"></div>
<div class="center">第五种方法：网格布局</div>
<div class="right"></div>
</div>
</body>
</html>
