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先上成果：
完整代码如下：
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8"/> 5 <title>CSS3画爱心</title> 6 <style> 7 .likeIcon { 8 width: 40px; 9 height: 60px; 10 position: relative; 11 } 12 13 .likeIcon:before { 14 position: absolute; 15 left: 20px; 16 content: " "; 17 border: 0 solid transparent; 18 border-radius: 100px 100px 0 0; 19 width: 20px; 20 height: 30px; 21 background: #fab003; 22 transform: rotate(-45deg); 23 24 } 25 26 .likeIcon:after { 27 position: absolute; 28 left: 27px; 29 top: 0px; 30 content: " "; 31 border: 0 solid transparent; 32 border-radius: 100px 100px 0 0; 33 width: 20px; 34 height: 30px; 35 background: #fab003; 36 transform: rotate(45deg); 37 38 } 39 </style> 40 </head> 41 <body> 42 43 <i class="likeIcon"></i> 44 45 </body> 46 </html>
3.两张图看原理
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原文地址：http://www.cnblogs.com/anywing/p/4729121.html
