blob: 99e4f9c30d1dd626773276c5e6af206641487d5f (
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
|
<!DOCTYPE html>
<title>Tests position fallback with scrollers with mixed writing modes</title>
<link rel="author" href="mailto:xiaochengh@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#scroll">
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#fallback-apply">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/test-common.js"></script>
<style>
body {
margin: 0;
}
#vrl-scroller {
writing-mode: vertical-rl;
overflow-x: scroll;
width: calc(100vw - 90px);
height: 400px;
outline: 1px solid black;
}
#anchor {
anchor-name: --a;
width: 100px;
height: 100px;
margin-left: 1000px;
background: orange;
}
#anchored {
position: fixed;
width: 100px;
height: 100px;
background: green;
anchor-default: --a;
position-fallback: --pf;
}
@position-fallback --pf {
/* Top of the anchor */
@try { bottom: anchor(--a top); left: anchor(--a left); }
/* Bottom of the anchor */
@try { top: anchor(--a bottom); left: anchor(--a left); }
/* Left of the anchor */
@try { top: anchor(--a top); right: anchor(--a left); }
}
</style>
<div style="height: 200px"></div>
<div id="vrl-scroller">
<div id="anchor"></div>
</div>
<div style="height: 1000px"></div>
<div id="anchored"></div>
<script>
promise_test(async () => {
await waitUntilNextAnimationFrame();
assert_fallback_position(anchored, anchor, 'top');
}, 'Should use the first fallback position at the initial scroll offsets');
promise_test(async () => {
document.documentElement.scrollTop = 101;
await waitUntilNextAnimationFrame();
assert_fallback_position(anchored, anchor, 'bottom');
}, 'Should use the second fallback position after scrolling viewport down');
promise_test(async () => {
let vrlScroller = document.getElementById('vrl-scroller');
vrlScroller.scrollLeft = -100;
await waitUntilNextAnimationFrame();
assert_fallback_position(anchored, anchor, 'left');
}, 'Should use the third fallback position after scrolling the vrl scroller left');
</script>
|
