三列浮动中间宽度自适应

二个固定定位,用margin 把左边和右边都让出来。
 
<!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>三列浮动中间宽度自适应</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        #left{
            border :1px solid red;
            width: 200px;
          /* height: 200px; */
            height: 100%;
            position: absolute;
            top :0px;
            left :0px;
        }
        #right{
            border :1px solid green;
            width: 200px;
    /* height: 200px; */
    height: 100%;
            position: absolute;
            top :0px;
            right :0px;
          
        }
        #center{
            background-color: #fcc;
            border:1px solid  black;
            /* height: 200px; */
            height: 100%;
            margin-left:205px;
            margin-right:205px;

 

            
        }
        .box{
            height:   500px;
            border:1px solid  green;
            position: relative;

 

        }
    
    
    </style>
</head>
<body>
    <div class="box">
        <div id="left"></div>
        <div id="center"></div>
        <div id="right"></div>

 

    </div>
 
</body>
</html>
posted @ 2020-08-14 15:21  AlanNever  阅读(28)  评论(0编辑  收藏