CSS3
属性 box-sizing
的使用: 当元素的宽度、高度肯定时, { box-sizing : border-box }
将元素的padding, border都将在设定的高度和宽度内绘制;也就是说,不管你的padding和border如何变化,它都不会超出预先设定好的宽度和高度.css
::after
选择器..container: after { content: " "; display: table; clear: both; }
CSS3
属性: @media
主要用于为不一样设备提供不一样的属性, 参考文档: CSS|MDN、本次练习代码示例:html
index.html文件:segmentfault
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <link rel="stylesheet" type="text/css" href="./public/index.css"> <title></title> </head> <body> <div class="row"> <div class="col-md-4 col-sm-6"> <div class="content"></div> </div> <div class="col-md-4 col-sm-6"> <div class="content"></div> </div> <div class="col-md-4 col-sm-12"> <div class="content"></div> </div> <div class="col-md-3 col-sm-3"> <div class="content"></div> </div> <div class="col-md-6 col-sm-6"> <div class="content"></div> </div> <div class="col-md-3 col-sm-3"> <div class="content"></div> </div> <div class="col-md-1 col-sm-2"> <div class="content"></div> </div> <div class="col-md-1 col-sm-2"> <div class="content"></div> </div> <div class="col-md-2 col-sm-8"> <div class="content"></div> </div> <div class="col-md-2 col-sm-3"> <div class="content"></div> </div> <div class="col-md-6 col-sm-3"> <div class="content"></div> </div> </div> </body> </html>
master.css文件布局
* { box-sizing: border-box; } [class*= 'col-'] { float: left; height: 70px; padding: 10px; } .content { border: 1px solid #999; background-color: #eee; height: 50px; } @media only screen and (min-width: 768.1px) { .col-md-1 { width: 8.333%; } .col-md-2 { width: 16.666%; } .col-md-3 { width: 25%; } .col-md-4 { width: 33.333%; } .col-md-5 { width: 41.666%; } .col-md-6 { width: 50%; } .col-md-8 { width: 66.666%; } .col-md-12 { width: 100%; } } @media only screen and (max-width: 768px) { .col-sm-1 { width: 8.333%; } .col-sm-2 { width: 16.666%; } .col-sm-3 { width: 25%; } .col-sm-4 { width: 33.333%; } .col-sm-5 { width: 41.666%; } .col-sm-6 { width: 50%; } .col-sm-8 { width: 66.666%; } .col-sm-12 { width: 100%; } } .row:after { display: table; content: " "; clear: both; }
(若有错漏 欢迎指正);code