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
130
131
132
133
134
135
136
137
138
|
<!DOCTYPE html>
<title>Tests fallback positions that overflow the inset-modified containing block regardless of scrolling</title>
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#fallback">
<link rel="author" href="mailto:xiaochengh@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script src="support/test-common.js"></script>
<style>
body { margin: 0; }
.ltr { direction: ltr; }
.rtl { direction: rtl; }
.vrl { writing-mode: vertical-rl; }
.vlr { writing-mode: vertical-lr; }
.cb {
width: 200px;
height: 200px;
transform: scale(1);
}
.spacer {
block-size: 50px;
}
.anchor {
width: 100px;
height: 100px;
margin-inline-start: 50px;
background: orange;
anchor-name: --a;
}
.anchored {
position: absolute;
width: 50px;
height: 50px;
background: lime;
}
/* Used on a element whose block and inline axes are the same with its
containing block, so that the first two positions will exceed the end edges
of the IMCB, and the last position will be used. */
.exceeds-end {
position-try-fallbacks: --exceeds-end-1, --exceeds-end-2;
left: 0;
right: anchor(--a left);
width: 100px;
}
@position-try --exceeds-end-1 {
inset: auto;
top: 0;
bottom: anchor(--a top);
width: auto;
height: 100px;
}
@position-try --exceeds-end-2 {
inset: auto;
top: 11px;
left: 22px;
width: auto;
height: auto;
}
/* Used on a element whose block and inline axes are in the opposite directions
of its containing block, so that the first two positions will exceed the
start edges of the IMCB, and the last position will be used. */
.exceeds-start {
position-try-fallbacks: --exceeds-start-1, --exceeds-start-2;
bottom: 0;
top: anchor(--a bottom);
height: 100px;
}
@position-try --exceeds-start-1 {
inset: auto;
right: 0;
left: anchor(--a right);
width: 100px;
height: auto;
}
@position-try --exceeds-start-2 {
inset: auto;
top: 11px;
left: 22px;
height: auto;
}
/* Both inset sides are `auto`, but the size is too big to fit in the containing
block. */
.exceeds-size {
position-try-fallbacks: --exceeds-size-1, --exceeds-size-2;
top: anchor(--a bottom);
left: auto;
right: auto;
width: 300px;
}
@position-try --exceeds-size-1 {
inset: auto;
left: anchor(--a right);
width: auto;
height: 300px;
}
@position-try --exceeds-size-2 {
inset: auto;
width: auto;
top: 11px;
left: 22px;
}
</style>
<body onload="checkLayoutForAnchorPos('.anchored')">
<div class=cb>
<div class=spacer></div>
<div class=anchor></div>
<div class="anchored exceeds-end"
data-offset-x=22 data-offset-y=11></div>
</div>
<div class="cb rtl vrl">
<div class=spacer></div>
<div class=anchor></div>
<div class="anchored ltr vlr exceeds-start"
data-offset-x=22 data-offset-y=11></div>
</div>
<div class="cb">
<div class=spacer></div>
<div class=anchor></div>
<div class="anchored exceeds-size"
data-offset-x=22 data-offset-y=11></div>
</div>
</body>
|
