File: no-css-animation-while-render-blocked.html

package info (click to toggle)
firefox-esr 128.14.0esr-1~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 4,230,248 kB
  • sloc: cpp: 7,104,262; javascript: 6,088,450; ansic: 3,654,017; python: 1,212,326; xml: 594,604; asm: 420,654; java: 182,969; sh: 71,124; makefile: 20,739; perl: 13,449; objc: 12,399; yacc: 4,583; cs: 3,846; pascal: 2,973; lex: 1,720; ruby: 1,194; exp: 762; php: 436; lisp: 258; awk: 247; sql: 66; sed: 54; csh: 10
file content (59 lines) | stat: -rw-r--r-- 1,340 bytes parent folder | download | duplicates (11) 
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
 
<!DOCTYPE html>
<meta name="timeout" content="long">
<html>
<title>View transitions: CSS Animations are paused while render-blocked</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:khushalsagar@chromium.org">

<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<style>
@keyframes fade {
  from {
    opacity: 0;
  }
}

div {
  width: 100px;
  height: 100px;
  background: blue;
  contain: paint;
  view-transition-name: target;
}

.animated {
  animation: fade 0.5s;
}
</style>

<div id=target></div>

<script>
let renderBlocked = true;

promise_test(() => {
  assert_implements(document.startViewTransition, "Missing document.startViewTransition");
  return new Promise(async (resolve, reject) => {
    requestAnimationFrame(() => {
      document.startViewTransition(() => {
        return new Promise(async (inner_resolve) => {
          step_timeout(() => {
            renderBlocked = false;
            inner_resolve();
          }, 1000);
        });
      });

      target.classList.toggle("animated");
      target.onanimationend = () => {
        if (renderBlocked)
          reject();
        else
          resolve();
      };
    });
  });
}, "CSS animation is blocked until prepare callback");
</script>