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
|
<!DOCTYPE html>
<html id="top">
<meta charset="utf-8">
<title>View timeline source</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>
<style>
#outer {
height: 400px;
width: 400px;
overflow: clip;
}
#inner {
height: 300px;
width: 300px;
overflow: clip;
}
#outer.scroller,
#inner.scroller {
overflow: scroll;
}
#spacer {
height: 1000px;
}
#target {
background: green;
height: 40px;
width: 40px;
}
</style>
<body>
<div id="outer" class="scroller">
<div id="inner" class="scroller">
<div id="target"></div>
<div id="spacer"></div>
</div>
</div>
</body>
<script>
'use strict';
function resetScrollers() {
inner.classList.add('scroller');
outer.classList.add('scroller');
}
function assert_source_id(viewTimeline, expected) {
const source = viewTimeline.source;
assert_true(!!source, 'No source');
assert_equals(source.id, expected);
}
promise_test(async t => {
t.add_cleanup(resetScrollers);
const viewTimeline = new ViewTimeline({ subject: target });
assert_equals(viewTimeline.subject, target);
assert_source_id(viewTimeline, 'inner');
inner.classList.remove('scroller');
assert_source_id(viewTimeline, 'outer');
outer.classList.remove('scroller');
assert_source_id(viewTimeline, 'top');
}, 'Default source for a View timeline is the nearest scroll ' +
'ancestor to the subject');
promise_test(async t => {
t.add_cleanup(resetScrollers);
const viewTimeline =
new ViewTimeline({ source: outer, subject: target });
assert_equals(viewTimeline.subject, target);
assert_source_id(viewTimeline, 'inner');
}, 'View timeline ignores explicitly set source');
promise_test(async t => {
t.add_cleanup(resetScrollers);
const viewTimeline =
new ViewTimeline({ subject: target });
assert_equals(viewTimeline.subject, target);
assert_source_id(viewTimeline, 'inner');
target.style = "display: none";
assert_equals(viewTimeline.source, null);
}, 'View timeline source is null when display:none');
</script>
</html>
|
