blob: 4dc2282184ae6f62323dd56b29ea9525db2f96b8 (
plain)
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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>CSS Test: Margin collapsing with clearance - clearance may be negative</title>
<link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins" />
<link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#normal-block" />
<link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
<link rel="author" title="Bruno Fassino" href="fassino[at]gmail.com" />
<link rel="match" href="margin-collapse-clear-014-ref.xht" />
<meta content="Clearance is created above the top margin of the element with clear set. Clearance can be negative. Clearance stops the collapsing of the element's margins with the preceding siblings' margins and with the parent block's bottom margin." name="assert" />
<style type="text/css"><![CDATA[
#rel-pos-wrapper {position: relative;}
#parent-lime
{
background-color: lime;
width: 50%;
}
#preceding-sibling-aqua
{
background-color: aqua;
height: 60px;
margin-bottom: 40px;
}
#float-left-blue
{
background-color: blue;
float: left;
height: 100px;
width: 100px;
}
#clear-left
{
clear: left;
margin-top: 120px;
}
#next-yellow
{
background-color: yellow;
height: 100px;
}
.ref-overlapped-red
{
background-color: red;
position: absolute;
z-index: -1;
}
#ref1
{
height: 200px;
top: 0px;
width: 50%;
}
#ref2
{
height: 100px;
top: 200px;
width: 100%;
}
]]></style>
</head>
<body>
<p>Test passes if there is <strong>no red</strong>.</p>
<div id="rel-pos-wrapper">
<!--
#parent-lime should have height 200px, sum of:
60px : height of #preceding-sibling-aqua
+
40px : margin-bottom of #preceding-sibling-aqua
+
100px : height of #float-left-blue
=====================================================
200px
-->
<div id="parent-lime">
<div id="preceding-sibling-aqua"></div>
<div id="float-left-blue"></div>
<div id="clear-left"></div>
</div>
<!--
clearance
+
margin-top of #clear-left (120px)
====================================
height of #float-left-blue (100px)
therefore, clearance is equal to -20px
-->
<div id="next-yellow"></div>
<!--
#ref1 and #ref2 boxes create a sort of 'reference rendering'
where #ref1 should be covered, overlapped by #parent-lime
while #ref2 should be covered, overlapped by #next-yellow.
-->
<div id="ref1" class="ref-overlapped-red"></div>
<div id="ref2" class="ref-overlapped-red"></div>
</div>
</body>
</html>
|
