animating-new-content-subset.html | Explore in Territory

<!DOCTYPE html>
<html class=reftest-wait>
<title>View transitions: animations in the new element show up in the images if it partially changes</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:[email protected]">
<link rel="match" href="animating-new-content-subset-ref.html">

<script src="/common/reftest-wait.js"></script>
<script src="/common/rendering-utils.js"></script>
<style>
#target {
  width:100px;
  height:100px;
  background: blue;
  view-transition-name: target;
  will-change: transform;
}

.child {
  width: 50px;
  height: 50px;
  will-change: transform;
  background: green;
}

.hidden {
  width: 10px;
  height: 10px;
  background: grey;
  view-transition-name: hidden;
}

html::view-transition-group(hidden) { animation-duration: 300s; visibility: hidden;}

html::view-transition-group(target) {
  animation: unset;
}

html::view-transition-image-pair(target) {
  isolation: unset;
}
html::view-transition-old(target), html::view-transition-new(target) {
  animation: unset;
  mix-blend-mode: normal;
}

html::view-transition-old(target) {
  opacity: 0;
}

html::view-transition-new(target) {
  opacity: 1;
}
</style>

<div id="target">
  <div class="child" id="child">
    I'm the inner composited child.
  </div>
</div>
<div class="hidden"></div>

<script>
failIfNot(document.startViewTransition, "Missing document.startViewTransition");

async function runTest() {
  let transition = document.startViewTransition();
  transition.ready.then(async () => {
    await waitForAtLeastOneFrame();
    await waitForAtLeastOneFrame();
    child.style.background = "grey";

    await waitForAtLeastOneFrame();
    await waitForAtLeastOneFrame();
    takeScreenshot();
  });
}
onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
</script>
chromium/third_party/blink/web_tests/external/wpt/css/css-view-transitions/animating-new-content-subset.html
