tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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pseudo-rendering-invalidation.html (3263B)

      1 <!DOCTYPE html>
      2 <html class=reftest-wait>
      3 <title>View transitions: invalidating VT pseudo elements renders correctly</title>
      4 <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
      5 <link rel="author" href="mailto:bokan@chromium.org">
      6 <link rel="match" href="pseudo-rendering-invalidation-ref.html">
      7 <meta name="fuzzy" content="maxDifference=0-20; totalPixels=0-300">
      8 
      9 <script src="/common/reftest-wait.js"></script>
     10 <style>
     11 :root {
     12  view-transition-name: none;
     13  background-color: red;
     14 }
     15 
     16 div {
     17  position: absolute;
     18  left: 0px;
     19  top: 600px;
     20  width: 100px;
     21  height: 100px;
     22 
     23  display: flex;
     24  justify-content: center;
     25  flex-direction: column;
     26  align-items: center;
     27 
     28  background: darkseagreen;
     29 }
     30 
     31 ::view-transition-group(*),
     32 ::view-transition-image-pair(*),
     33 ::view-transition-old(*),
     34 ::view-transition-new(*) {
     35  animation-play-state: paused;
     36 }
     37 
     38 ::view-transition {
     39  background-color: limegreen;
     40 }
     41 
     42 ::view-transition-new(new) {
     43  animation: none;
     44  opacity: 1;
     45 }
     46 ::view-transition-old(new) {
     47  animation: none;
     48  opacity: 0;
     49 }
     50 
     51 ::view-transition-new(old) {
     52  animation: none;
     53  opacity: 0;
     54 }
     55 ::view-transition-old(old) {
     56  animation: none;
     57  opacity: 1;
     58 }
     59 
     60 .invalidateRoot::view-transition {
     61  /* Making view-transition `display: none` will abort the transition. Changing
     62     it to position: static (at least in Chrome) will cause it to rebuild its
     63     layout tree. */
     64  position: static;
     65 }
     66 
     67 .invalidateGroup::view-transition-group(group) {
     68  display: none;
     69 }
     70 
     71 .invalidateImagePair::view-transition-image-pair(imagepair) {
     72  display: none;
     73 }
     74 
     75 .invalidateNew::view-transition-new(new) {
     76  display: none;
     77 }
     78 
     79 .invalidateOld::view-transition-old(old) {
     80  display: none;
     81 }
     82 
     83 </style>
     84 
     85 <div style="left: 0px; top: 100px; view-transition-name:group;">Group</div>
     86 <div style="left: 150px; top: 100px; view-transition-name:imagepair;">Image-Pair</div>
     87 <div style="left: 0px; top: 250px; view-transition-name:old;">Old</div>
     88 <div style="left: 150px; top: 250px; view-transition-name:new;">New</div>
     89 
     90 <script>
     91 failIfNot(document.startViewTransition, "Missing document.startViewTransition");
     92 
     93 async function rAF() {
     94  return new Promise(resolve => requestAnimationFrame(resolve));
     95 }
     96 
     97 async function performInvalidations() {
     98  await rAF();
     99  await rAF();
    100 
    101  const docClassList = document.documentElement.classList;
    102  const classNames = [
    103      'invalidateRoot',       // Invalidates ::view-transition
    104      'invalidateGroup',      // Invalidates ::view-transition-group
    105      'invalidateImagePair',  // Invalidates ::view-transition-image-pair
    106      'invalidateOld',        // Invalidates ::view-transition-old
    107      'invalidateNew'         // Invalidates ::view-transition-new
    108  ];
    109 
    110  for (let className of classNames) {
    111    document.documentElement.classList.add(className);
    112    await rAF();
    113    document.documentElement.classList.remove(className);
    114    await rAF();
    115  }
    116 }
    117 
    118 // This test ensures each of the view-transition pseudos is able to be
    119 // individually recreated after becoming display: none.
    120 async function runTest() {
    121  let transition = document.startViewTransition();
    122  await transition.ready;
    123  await performInvalidations();
    124  takeScreenshot();
    125 }
    126 
    127 onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
    128 </script>