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
|
<!DOCTYPE html>
<html id="top">
<head>
<meta charset="utf-8">
<title>View timeline with sticky during entry/exit</title>
<link rel="help" href="https://drafts.csswg.org/scroll-animations-1/#viewtimeline-interface">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<script src="/scroll-animations/scroll-timelines/testcommon.js"></script>
<script src="/scroll-animations/view-timelines/testcommon.js"></script>
<style>
#container {
height: 500px;
overflow: auto;
}
.space {
height: 550px;
}
/* top-sticky and bottom-sticky during entry */
.stickycase3 {
background: yellow;
position: sticky;
top: 375px;
bottom: -125px;
height: 200px;
}
#target {
position: relative;
top: 50px;
background: orange;
height: 100px;
}
</style>
</head>
<body>
<div id="container">
<div class="space"></div>
<div class="space">
<div style="height: 150px"></div>
<div id="sticky" class="stickycase3">
<div id="target">Subject</div>
</div>
</div>
<div class="space"></div>
</div>
<script type="text/javascript">
// The "cover" range would be [STATIC_START, STATIC_END] if we ignored
// stickiness (i.e., considered only static position).
//
// STATIC_START = scroll distance to second spacer (50px)
// + position of sticky element within its container (150px)
// + position of target within sticky element (50px)
// STATIC_END = STATIC_START
// + viewport height (500px)
// + target height (100px)
const STATIC_START = 250;
const STATIC_END = 850;
// This is how far the sticky element can move upwards when bottom-stuck.
const ROOM_ABOVE = 150;
// This is how far the sticky element can move downwards when top-stuck.
const ROOM_BELOW = 200;
const TARGET_HEIGHT = 100;
const VIEWPORT_HEIGHT = 500;
promise_test(async t => {
await runTimelineRangeTest(t, {
rangeStart: { rangeName: 'cover', offset: CSS.percent(0) } ,
rangeEnd: { rangeName: 'cover', offset: CSS.percent(100) },
startOffset: STATIC_START - ROOM_ABOVE,
endOffset: STATIC_END + ROOM_BELOW,
axis: 'block'
});
await runTimelineRangeTest(t, {
rangeStart: { rangeName: 'contain', offset: CSS.percent(0) } ,
rangeEnd: { rangeName: 'contain', offset: CSS.percent(100) },
startOffset: STATIC_START + ROOM_BELOW + TARGET_HEIGHT,
endOffset: STATIC_END + ROOM_BELOW - TARGET_HEIGHT,
axis: 'block'
});
await runTimelineRangeTest(t, {
rangeStart: { rangeName: 'entry', offset: CSS.percent(0) },
rangeEnd: { rangeName: 'entry', offset: CSS.percent(100) },
startOffset: STATIC_START - ROOM_ABOVE,
endOffset: STATIC_START + ROOM_BELOW + TARGET_HEIGHT,
axis: 'block'
});
await runTimelineRangeTest(t, {
rangeStart: { rangeName: 'entry-crossing', offset: CSS.percent(0) },
rangeEnd: { rangeName: 'entry-crossing', offset: CSS.percent(100) },
startOffset: STATIC_START - ROOM_ABOVE,
endOffset: STATIC_START + ROOM_BELOW + TARGET_HEIGHT,
axis: 'block'
});
await runTimelineRangeTest(t, {
rangeStart: { rangeName: 'exit', offset: CSS.percent(0) },
rangeEnd: { rangeName: 'exit', offset: CSS.percent(100) },
startOffset: STATIC_END + ROOM_BELOW - TARGET_HEIGHT,
endOffset: STATIC_END + ROOM_BELOW,
axis: 'block'
});
await runTimelineRangeTest(t, {
rangeStart: { rangeName: 'exit-crossing', offset: CSS.percent(0) },
rangeEnd: { rangeName: 'exit-crossing', offset: CSS.percent(100) },
startOffset: STATIC_END + ROOM_BELOW - TARGET_HEIGHT,
endOffset: STATIC_END + ROOM_BELOW,
axis: 'block'
});
}, 'View timeline top-sticky and bottom-sticky during entry.');
</script>
</body>
</html>
|
