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三列自适应布局(左右定宽 中间自适应)

左右定中间自适应三列布局

1.绝对定位 2.浮动 3.flex

 1 1.绝对定位 2 <!doctype html> 3 <head> 4     <meta charset="utf-8" /> 5     <title>三栏布局</title> 6     <style type="text/css"> 7     * { 8         margin: 0; 9         padding: 0;10     }11     12     #main {13         margin: 0 300px;14         height: 200px;15         background: #00b7ef;16     }17     18     #left,19     #right {20         width: 300px;21         height: 200px;22     }23     24     #left {25         position: absolute;26         top: 0;27         left: 0;28         background: #8fc41f;29     }30     31     #right {32         position: absolute;33         top: 0;34         right: 0;35         background: #fffaba;36     }37     </style>38 </head>39 40 <body>41     <!-- 位置是left main right 位置可互换-->42     <div id="left">43     </div>44     <div id="right">45     </div>46     <div id="main">47     </div>48 </body>49 50 </html>
 1 2.浮动 2 <!DOCTYPE html> 3 <html lang="en"> 4  5 <head> 6     <meta charset="utf-8" /> 7     <title> 三列左右固定宽度中间自适应</title> 8     <style> 9     body {10         margin: 0;11         padding: 0;12     }13     14     #left {15         background-color: #E8F5FE;16         height: 400px;17         width: 100px;18         float: left;19     }20     21     #center {22         background-color: #F2FDDB;23         height: 400px;24         margin-right: 100px;25         margin-left: 100px;26     }27     28     #right {29         background-color: #FFE7F4;30         height: 400px;31         width: 100px;32         float: right;33     }34     </style>35 </head>36 37 <body>38     <!-- 必须是左右中三列顺序 如果是float-->39     <div id="left">左列</div>40     <div id="right">右列</div>41     <div id="center">中列</div>42 </body>43 44 </html>
 1 3. flex 2 <!DOCTYPE html> 3 <html lang="en"> 4  5 <head> 6     <meta charset="UTF-8"> 7     <title>Document</title> 8     <style type="text/css"> 9     * {10         margin: 0;11         padding: 0;12     }13     14     .three-coloum {15         display: flex;16         display: -webkit-flex;17         width: 100%;18         height: 500px;19     }20     21     .left {22         background-color: red;23         width: 200px;24         /*height: 100px;*/25     }26     27     .right {28         background: blue;29         width: 200px;30         /*height: 100px;*/31     }32     33     .main {34         background: yellow;35         flex: 1;36         -webkit-box-flex: 1;37         -moz-box-flex: 1;38     }39     </style>40 </head>41 42 <body>43     <div class="three-coloum">44         <div class="left"></div>45         <div class="main">中间</div>46         <div class="right"></div>47     </div>48 </body>49 50 </html>

 

 

 

三列自适应布局(左右定宽 中间自适应)