clearfix清除浮动

 1 .clearfix:after {
 2     content: ".";
 3     display: block;
 4     height: 0;
 5     clear: both;
 6     visibility: hidden;
 7 }
 8 .clearfix {
 9     display: inline-table;
10     zoom: 1;
11 }
12 /* Hides from IE-mac \*/
13 * html .clearfix {
14     height: 1%;
15 }
16 .clearfix {
17     display: block;
18 }
19 /* End hide from IE-mac */
20 .clear {
21     clear: both;
22 }
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原文地址：https://www.cnblogs.com/vincent_ds/p/2593137.html