两边固定宽度，中间自适应
<html>
<style>
html,body{
height:100%;
}
.left,.right,.center{
height:100%;
}
.left{
300px;
position:absolute;
left:0;
background-color:red;
}
.right{
300px;
position:absolute;
right:0;
background-color:blue;
}
.center{
100%;
margin-left:300px;
margin-right:300px;
background-color:green;
}
</style>
<body>
<div class="left"></div>
<div class="right"></div>
<div class="center"></div>
</body>
</html>
两边自适应，中间固定
<html>
<style>
html,body{
height:100%;
}
.left,.right,.center{
height:100%;
}
.left{
position:absolute;
left:0;
right:50%;
margin-right:150px;
background-color:red;
}
.right{
position:absolute;
left:50%;
right:0;
margin-left:150px;
background-color:blue;
}
.center{
300px;
position:absolute;
left:50%;
margin-left:150px;
background-color:green;
}
</style>
<body>
<div class="left"></div>
<div class="right"></div>
<div class="center"></div>
</body>
</html>
使用table-cell实现三栏布局
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>使用table-cell 实现三栏布局，左右定宽中间自适应</title>
<style>
.parent {
display: table;
100%;
}
.parent> div {
display: table-cell;
height: 200px;
border: 1px solid red;
box-sizing: border-box;
}
.left {
100px;
}
.right {
200px;
}
</style>
</head>
<body>
<div class="parent">
<div class="left">Left</div>
<div class="main">Main</div>
<div class="right">Right</div>
</div>
</body>
</html>
一劳永逸的搞定 flex 布局
https://juejin.im/post/58e3a5a0a0bb9f0069fc16bb