css的content属性使用

发表于
岁月这东西，总是要按时带走它要带走的部分。

p 标签内容空时

1
2
3
4
p:empty:before {
    color: #CCC;
    content: "Don't make me empty!";
}

p 标签起始增加内部内容

1
2
3
4
p:before { 
   display: block;
   content: 'Some'; 
}

p 标签结尾增加内部内容

1
2
3
4
p:after { 
   display: block;
   content: 'Some'; 
}

将a标签的title属性添加到a的text

1
2
3
4
5
a:before {
   content: attr(title) ": ";
}

<a title="A web design community." href="https://css-tricks.com">CSS-Tricks</a>

增加 unicode 字符

https://unicode-table.com/cn/2665/

1
2
3
4
5
p::after {
    content:  "\2665";
    color: red;
    font-size: 23px;
}

tooltips实现

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
a {
  color: #900;
  text-decoration: none;
}

a:hover {
  color: red;
  position: relative;
}

a[title]:hover::after {
  content: attr(title);
  padding: 4px 8px;
  color: #333;
  position: absolute;
  left: 0; 
  top: 100%;
  white-space: nowrap; 
  z-index: 20;
  border-radius: 5px;   
  box-shadow: 0px 0px 4px #222;  
  background-image: linear-gradient(#eeeeee, #cccccc);  
}

标题前后加对称图标

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
h2 {
  text-align: center;     
}
h2:before, h2:after {
  font-family: "Some cool font with glyphs", serif;
  content: "\00d7";  /* Some fancy character */
  color: #c83f3f;
}
h2:before {
  margin-right: 10px;
}
h2:after {
  margin-left: 10px;
}

实现面包屑效果

1
2
3
4
5
6
7
8
9
10
11
12
li {
    float: left;
    margin-left: 12px;
    list-style-type: none;
}

li:after {
  content: "// ";
  position: relative;
  left: 3px;
}

https://css-tricks.com/pseudo-element-roundup/#top-of-site