blob: 026b16877c517dce2d12c1b348b7cbc8da94108b (
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
|
<!doctype html>
<html>
<head>
<meta charset=utf-8>
<title>CSS Transitions Test: behavior when transition-duration changes while transitioning</title>
<meta name="assert" content="Checks a change to the transition-duration
property does not affect an in-flight transition">
<link rel="help" title="3. Starting of transitions" href="https://drafts.csswg.org/css-transitions/#starting">
<script src="/resources/testharness.js" type="text/javascript"></script>
<script src="/resources/testharnessreport.js" type="text/javascript"></script>
<script src="./support/helper.js" type="text/javascript"></script>
</head>
<body>
<div id="log"></div>
<script>
promise_test(async t => {
// Start a 100s transition 50% of the way through
const div = addDiv(t, {
style: 'transition: height 100s -50s linear; height: 0px',
});
getComputedStyle(div).height;
div.style.height = '100px';
assert_equals(
getComputedStyle(div).height,
'50px',
'Transition should be initially 50% complete'
);
// Extend the transition-duration to 200s.
div.style.transitionDuration = '200s';
// If the change to the transition-duration was reflected, the
// computed height would now be '25px'.
assert_equals(
getComputedStyle(div).height,
'50px',
'Even after updating the transition-duration, the transition should be 50% complete'
);
// Wait a frame just to be sure that the changed duration is not later
// updated.
await waitForFrame();
assert_greater_than_equal(
parseInt(getComputedStyle(div).height),
50,
'Even in the next frame the updated transition-duration should not apply'
);
}, 'Changes to transition-duration should not affect in-flight transitions');
</script>
</body>
</html>
|
