tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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offscreen-element-modified-before-coming-onscreen.html (2047B)

      1 <!DOCTYPE html>
      2 <html class=reftest-wait>
      3 <title>View transitions: new element is modified while offscren and brought onscreen using pseudo</title>
      4 <link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
      5 <link rel="author" href="mailto:khushalsagar@chromium.org">
      6 <link rel="match" href="offscreen-element-modified-before-coming-onscreen-ref.html">
      7 
      8 <script src="/common/reftest-wait.js"></script>
      9 <style>
     10 #target {
     11  width: 100px;
     12  height: 100px;
     13  view-transition-name: target;
     14  position: fixed;
     15  background: green;
     16  left: 0;
     17  top: 200vh;
     18 }
     19 
     20 .hidden {
     21  width: 10px;
     22  height: 10px;
     23  background: grey;
     24  view-transition-name: hidden;
     25 }
     26 
     27 .onscreen::view-transition-group(target) {
     28  transform: unset;
     29  position: fixed;
     30  top: 0;
     31  left: 0;
     32  animation: unset;
     33 }
     34 
     35 html::view-transition-group(hidden) { animation-duration: 300s; }
     36 html::view-transition-image-pair(hidden) { animation: unset; opacity: 0; }
     37 
     38 html::view-transition-old(target) { animation: unset; opacity: 0; }
     39 html::view-transition-new(target) { animation: unset; opacity: 1; }
     40 
     41 </style>
     42 
     43 <div id=target class=target>
     44 <div id=hidden class=hidden></div>
     45 
     46 <script>
     47 failIfNot(document.startViewTransition, "Missing document.startViewTransition");
     48 
     49 function bringOnscreenAndScreenshot() {
     50  document.documentElement.classList.add("onscreen");
     51 
     52  requestAnimationFrame(() => requestAnimationFrame(() =>
     53      requestAnimationFrame(() => requestAnimationFrame(takeScreenshot))
     54    ));
     55 }
     56 
     57 async function runTest() {
     58  // Start the transition while the element is offscreen.
     59  let transition = document.startViewTransition();
     60  await transition.ready;
     61 
     62  // Change the element's color while its still offscreen.
     63  target.style.background = "blue";
     64 
     65  // Bring the element onscreen and ensure the color change is presented.
     66  requestAnimationFrame(() => requestAnimationFrame(() =>
     67    requestAnimationFrame(() => requestAnimationFrame(
     68      bringOnscreenAndScreenshot))
     69  ));
     70 }
     71 onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
     72 </script>