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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/css-scroll-snap-1/#scroll-snap-type" />
<meta name="viewport" content="user-scalable=no">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
html {
margin: 0px;
overflow: scroll;
scroll-snap-type: both mandatory;
}
div {
position: absolute;
}
.scroller {
overflow: scroll;
scroll-snap-type: both mandatory;
}
#inner-scroller {
top: 3000px;
width: 800px;
height: 800px;
}
.space {
left: 0px;
top: 0px;
width: 4000px;
height: 4000px;
}
.target {
width: 600px;
height: 600px;
scroll-snap-align: start;
}
.left {
left: 0px;
}
.right {
left: 1000px;
}
.top {
top: 0px;
}
.bottom {
top: 1000px;
}
</style>
<body class="scroller">
<div class="space"></div>
<div class="target left top"></div>
<div class="target right top"></div>
<div class="target left bottom"></div>
<div class="target right bottom"></div>
<div class="scroller" id="inner-scroller">
<div class="space"></div>
<div class="target left top"></div>
<div class="target right top"></div>
<div class="target left bottom"></div>
<div class="target right bottom"></div>
</div>
</body>
<script>
function format_dict(dict) {
const props = [];
for (let prop in dict) {
props.push(`${prop}: ${format_value(dict[prop])}`);
}
return `{${props.join(', ')}}`;
}
var divScroller = document.getElementById("inner-scroller");
var viewport = document.scrollingElement;
[
[{left: 800}, 1000, 0],
[{top: 900}, 0, 1000],
[{left: 900, top: 800}, 1000, 1000],
[{left: 800, top: -100}, 1000, 0], /* outside bounds on y axis */
[{left: 10000, top: -100}, 1000, 0] /* outside bounds on both axes */
].forEach(([input, expectedX, expectedY]) => {
test(() => {
divScroller.scrollTo(0, 0);
assert_equals(divScroller.scrollLeft, 0);
assert_equals(divScroller.scrollTop, 0);
if (input.left)
divScroller.scrollLeft = input.left;
if (input.top)
divScroller.scrollTop = input.top;
assert_equals(divScroller.scrollLeft, expectedX);
assert_equals(divScroller.scrollTop, expectedY);
}, `assign scrollLeft and scrollTop for ${format_dict(input)} on div lands on (${expectedX}, ${expectedY})`);
test(() => {
viewport.scrollTo(0, 0);
assert_equals(viewport.scrollLeft, 0);
assert_equals(viewport.scrollTop, 0);
if (input.left)
viewport.scrollLeft = input.left;
if (input.top)
viewport.scrollTop = input.top;
assert_equals(viewport.scrollLeft, expectedX);
assert_equals(viewport.scrollTop, expectedY);
}, `assign scrollLeft and scrollTop for ${format_dict(input)} on viewport-defining element lands on (${expectedX}, ${expectedY})`);
test(() => {
divScroller.scrollTo(0, 0);
assert_equals(divScroller.scrollLeft, 0);
assert_equals(divScroller.scrollTop, 0);
divScroller.scrollTo(input);
assert_equals(divScroller.scrollLeft, expectedX);
assert_equals(divScroller.scrollTop, expectedY);
}, `scrollTo(${format_dict(input)}) on div lands on (${expectedX}, ${expectedY})`);
test(() => {
divScroller.scrollTo(0, 0);
assert_equals(divScroller.scrollLeft, 0);
assert_equals(divScroller.scrollTop, 0);
divScroller.scrollBy(input);
assert_equals(divScroller.scrollLeft, expectedX);
assert_equals(divScroller.scrollTop, expectedY);
}, `scrollBy(${format_dict(input)}) on div lands on (${expectedX}, ${expectedY})`);
test(() => {
viewport.scrollTo(0, 0);
assert_equals(viewport.scrollLeft, 0);
assert_equals(viewport.scrollTop, 0);
viewport.scrollTo(input);
assert_equals(viewport.scrollLeft, expectedX);
assert_equals(viewport.scrollTop, expectedY);
}, `scrollTo(${format_dict(input)}) on viewport-defining element lands on (${expectedX}, ${expectedY})`);
test(() => {
viewport.scrollTo(0, 0);
assert_equals(viewport.scrollLeft, 0);
assert_equals(viewport.scrollTop, 0);
viewport.scrollBy(input);
assert_equals(viewport.scrollLeft, expectedX);
assert_equals(viewport.scrollTop, expectedY);
}, `scrollBy(${format_dict(input)}) on viewport-defining element lands on (${expectedX}, ${expectedY})`);
test(() => {
window.scrollTo(0, 0);
assert_equals(window.scrollX, 0);
assert_equals(window.scrollY, 0);
window.scrollTo(input);
assert_equals(window.scrollX, expectedX);
assert_equals(window.scrollY, expectedY);
}, `scrollTo(${format_dict(input)}) on window lands on (${expectedX}, ${expectedY})`);
test(() => {
window.scrollTo(0, 0);
assert_equals(window.scrollX, 0);
assert_equals(window.scrollY, 0);
window.scrollBy(input);
assert_equals(window.scrollX, expectedX);
assert_equals(window.scrollY, expectedY);
}, `scrollBy(${format_dict(input)}) on window lands on (${expectedX}, ${expectedY})`);
});
</script>
|
