css3(::before)伪元素的使用 

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 
 4 <head>
 5     <meta charset="UTF-8">
 6     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 7     <meta http-equiv="X-UA-Compatible" content="ie=edge">
 8     <meta name="author" content="杨欣">
 9     <title>css3伪元素::before的使用</title>
10     <style>
11         h3{
12             font-size: 24px;
13             margin: 0;
14             padding: 0;
15             white-space: nowrap;
16             overflow: hidden;
17             text-overflow: ellipsis
18         }
19         h3::before{
20             content: attr(title);
21             color: #fff;
22             background: rgb(197, 50, 30);
23             font-size: 16px;
24             margin-right: 10px;
25             padding: 5px
26         }
27     </style>
28 </head>
29 
30 <body>
31 <h3 title="置顶">这是文章的标题，这是文章的标题，这是文章的标题。</h3>
32 </body>
33 
34 </html>

 

posted @ 2019-03-15 10:17  Samsara315  阅读(185)  评论(0)    收藏  举报