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
161
|
<!DOCTYPE html>
<meta charset="utf-8">
<meta name="flags" content="dom">
<title>CSS Test: CSSOM View MediaQueryList::{add,remove}Listener</title>
<link rel="author" title="Rune Lillesveen" href="mailto:rune@opera.com">
<link rel="help" href="https://www.w3.org/TR/cssom-view-1/#the-mediaquerylist-interface">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/matchMedia.js"></script>
<div id="log"></div>
<script>
"use strict";
test(() => {
const mql = window.matchMedia("(min-width: 100px)");
mql.addListener(null);
mql.addListener(undefined);
mql.removeListener(null);
mql.removeListener(undefined);
}, "EventListener parameter is optional");
promise_test(async t => {
const iframe = await createIFrame(t, 200, 100);
const heightMQL = iframe.contentWindow.matchMedia("(max-height: 50px)");
const widthMQL = iframe.contentWindow.matchMedia("(min-width: 150px)");
let heightEvent;
let widthEvent;
heightMQL.addListener(event => {
heightEvent = event;
});
widthMQL.addListener(event => {
widthEvent = event;
});
assert_false(heightMQL.matches);
assert_true(widthMQL.matches);
iframe.height = "50"; // 200x100 => 200x50
await waitForChangesReported();
assert_equals(heightEvent.media, heightMQL.media);
assert_true(heightEvent.matches);
assert_true(heightMQL.matches);
assert_true(widthMQL.matches);
iframe.width = "100"; // 200x50 => 100x50
await waitForChangesReported();
assert_equals(widthEvent.media, widthMQL.media);
assert_false(widthEvent.matches);
assert_false(widthMQL.matches);
assert_true(heightMQL.matches);
}, "listeners are called when <iframe> is resized");
promise_test(async t => {
const mql = await createMQL(t);
let eventsCount = 0;
mql.addListener(() => {
eventsCount++;
});
for (let i = 1; i <= 10; i++) {
triggerMQLEvent(mql);
await waitForChangesReported();
assert_equals(eventsCount, i);
}
}, "listeners are called correct number of times");
promise_test(async t => {
const mql = await createMQL(t);
const calls = [];
mql.addListener(() => {
calls.push("1st");
});
mql.addListener(() => {
calls.push("2nd");
});
triggerMQLEvent(mql);
await waitForChangesReported();
assert_array_equals(calls, ["1st", "2nd"]);
}, "listeners are called in order they were added");
promise_test(async t => {
const mql = await createMQL(t);
let called = 0;
const listener = () => {
called++;
};
mql.addListener(listener);
mql.addListener(listener);
triggerMQLEvent(mql);
await waitForChangesReported();
assert_equals(called, 1);
}, "listener that was added twice is called only once");
promise_test(async t => {
const iframe = await createIFrame(t, 100);
const media = `(min-width: 200px)`;
const mql1 = iframe.contentWindow.matchMedia(media);
const mql2 = iframe.contentWindow.matchMedia(media);
const calls = [];
mql2.addListener(() => {
calls.push("mql2");
});
mql1.addListener(() => {
calls.push("mql1");
});
iframe.width = "200"; // 100x100 => 200x100
await waitForChangesReported();
assert_array_equals(calls, ["mql1", "mql2"]);
}, "listeners are called in order their MQLs were created");
promise_test(async t => {
const iframe = await createIFrame(t, 200);
const media = `(max-height: 150px)`;
const mql1 = iframe.contentWindow.matchMedia(media);
const mql2 = iframe.contentWindow.matchMedia(media);
let calls = 0;
const listener = () => {
calls++;
};
mql1.addListener(listener);
mql2.removeListener(listener);
iframe.height = "50"; // 200x200 => 200x50
await waitForChangesReported();
assert_equals(calls, 1);
}, "removing listener from one MQL doesn't remove it from all MQLs");
promise_test(async t => {
const mql = await createMQL(t);
const listener = t.unreached_func("should not be called");
mql.addListener(listener);
mql.removeListener(listener);
triggerMQLEvent(mql);
await waitForChangesReported();
}, "MediaQueryList::removeListener removes added listener");
</script>
|
