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>
<html>
<head>
<meta charset="utf-8">
<title> CSS Scroll Snap 2 Test: scroll-initial-target*</title>
<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-2/#scroll-initial-target">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<style>
.spacer {
width: 1000px;
height: 1000px;
}
.scroller {
width: 300px;
height: 300px;
border: solid 1px black;
overflow: scroll;
margin: 0px;
position: absolute;
scroll-start: end end;
/* This should be overriden by scroll-initial-target. */
}
.box {
position: absolute;
width: 200px;
height: 200px;
}
.top_left {
top: 0px;
left: 0px;
background-color: red;
}
.center {
top: 200px;
left: 200px;
background-color: purple;
scroll-initial-target: nearest;
}
.bottom_right {
top: 400px;
left: 400px;
background-color: yellow;
}
</style>
<div class="scroller" id="scroller">
<div class="spacer"></div>
<div class="top_left box" id="top_left_box"></div>
<div class="center box" id="centerbox"></div>
<div class="bottom_right box"></div>
</div>
<script>
test((t) => {
let scroller = document.getElementById("scroller");
let top_left_box = document.getElementById("top_left_box");
const expected_scroll_top = top_left_box.getBoundingClientRect().height;
const expected_scroll_left = top_left_box.getBoundingClientRect().width;
assert_approx_equals(scroller.scrollTop, expected_scroll_top, 1,
"scroll-initial-target sets initial vertical scroll position");
assert_approx_equals(scroller.scrollLeft, expected_scroll_left, 1,
"scroll-initial-target sets initial horizontal scroll position");
});
</script>
</body>
|
