1. 浮动法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>两边定宽，中间自适应</title>
<style type="text/css">
html,body,div{
height: 80%;
border:3px solid black;
} .left{ 300px; float: left; background-color: red; } .right{ 300px; float: right; background-color: yellow; } .center{ margin: auto 300px; background-color: green; } </style> </head> <body> <div class="left"></div> <div class="right"></div> <div class="center"></div> </body> </html>
2. 定位法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>两边定宽，中间自适应</title>
<style type="text/css">
html,body,div{
height: 80%;
border:3px solid black;
} .parent{ position: relative; } .left{ 300px; position: absolute; left: 0; background-color: red; } .right{ 300px; position: absolute; right: 0; background-color: yellow; } .center{ margin: auto 300px; background-color: green; } </style> </head> <body> <div class="parent"> <div class="left"></div> <div class="right"></div> <div class="center"></div> </div> </body> </html>
3. 弹性盒子法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>两边定宽，中间自适应</title>
<style type="text/css">
html,body,div{
height: 80%;
border:3px solid black;
} .parent{ display: flex; } .left{ 300px; background-color: red; } .right{ 300px; background-color: yellow; } .center{ flex:1; background-color: green; } </style> </head> <body> <div class="parent"> <div class="left"></div> <div class="center"></div> <div class="right"></div> </div> </body> </html>
4.calc计算法
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>两边定宽，中间自适应</title>
<style type="text/css">
html,body,div{
height: 80%;
border:3px solid black;
}
.left{
300px;
float: left;
background-color: red;
}
.right{
300px;
float: right;
background-color: yellow;
}
.center{
calc(100% - 620px);
margin: 0 auto;
background-color: green;
}
</style>
</head>
<body>
<div class="left"></div>
<div class="right"></div>
<div class="center"></div>
</body>
</html>