1.利用flex实现
1.父盒子设置 display:flex;
2.左右盒子设置固定宽高
3.中间盒子设置 flex:1 ;
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
.father {
display: flex;
height: 500%;
background-color: hotpink;
}
.left,.right {
width: 200px;
height: 400px;
background-color: purple;
}
.center {
flex: 1;
background-color: pink;
}
</style>
</head>
<body>
<div class="father">
<div class="left"></div>
<div class="center"></div>
<div class="right"></div>
</div>
</body>
</html>
结果如下:
2.利用定位实现
1.父盒子设置左右 padding 值
2.给左右盒子的 width 设置父盒子的 padding 值,然后分别定位到 padding 处
3.中间盒子自适应
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
.father {
position: relative;
height: 500px;
background-color: hotpink;
padding: ;
}
.left,.right {
position: absolute;
width: 200px;
height: 400px;
background-color: purple;
top: 0;
}
.left {
left: 0;
}
.right {
right: 0;
}
.center {
background-color: pink;
}
</style>
</head>
<body>
<div class="father">
<div class="left"></div>
<div class="center"></div>
<div class="right"></div>
</div>
</body>
</html>
结果如下:
3.利用 bfc 块级格式化上下文, 实现两侧固定中间自适应
1.左右固定宽高,进行浮动
2.中间 overflow: hidden;
注意:这里的html结构中left和right必须放在center之前
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
.father {
height: 500px;
background-color: hotpink;
}
.left,.right {
width: 200px;
height: 400px;
background-color: purple;
}
.left {
float: left;
}
.right {
float: right;
}
.center {
overflow: hidden;
background-color: pink;
}
</style>
</head>
<body>
<div class="father">
<div class="left"></div>
<div class="right"></div>
<div class="center"></div>
</div>
</body>
</html>
结果如下: