当父标签同时使用了position的relative与absolute时，参考一下demo(即父标签使用position:relative，而‘父标签:before’使用了position:absolute时)，无论怎样变换父标签和其‘父标签:before’的层级大小，‘父标签:before’都会覆盖在父标签的上面，即层级会比父标签要高，而父标签的a等的鼠标效果都会表面上失效。
解决方法是：把‘父标签:before’的层级设置为负一（即z-index:-1）
原因暂时不知，有待深究
使用demo时，注意引用一下css，或者自己写一下^_^
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>position引起的层级bug</title>
</head>
<style>
</style>
<body>
<div class="wrap">
<div class="body-wrap">
<div class="avatar">
<img src="http://img1.touxiang.cn/uploads/20130506/06-024331_749.jpg" alt="" class="avatar-img">
</div>
<div class="body">
<div class="title">我是title</div>
<div>
<a href="http://www.baidu.com">我是连接</a>
</div>
</div>
</div>
</div>
</body>
</html>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
html,
body {
font-size: 14px;
}
body {
margin: 0;
padding: 0;
}
.wrap {
width: 60%;
margin: 2rem auto;
}
.body-wrap {
position: relative;
padding-left: 90px;
background-color: transparent;
}
.avatar {
position: absolute;
top: 0;
left: 0;
width: 180px;
height: 180px;
border-radius: 50%;
border: 1px solid red;
background-color: #efefef;
z-index: 12;
overflow: hidden;
}
.avatar:before {
z-index: 10;
content: '';
position: absolute;
top: 4px;
left: 4px;
width: 170px;
height: 170px;
border-radius: 50%;
border: 1px solid red;
}
.avatar-img {
display: block;
max-width: 100%;
}
.body {
position: relative;
padding-left: 110px;
min-height: 180px;
border-top: 1px solid red;
border-bottom: 1px solid red;
border-right: 1px solid red;
background-color: transparent;
}
.body:before {
z-index: -1;
content: '';
position: absolute;
top: 4px;
left: 4px;
width: 99%;
height: 170px;
border-top: 1px solid red;
border-bottom: 1px solid red;
border-right: 1px solid red;
background-color: #efefef;
}
.title {
margin-top: 30px;
margin-bottom: 1rem;
font-size: 2rem;
}
a {
font-size: 1.28rem;
}
|
