content-visibility-auto-shared-element.html

<!DOCTYPE html>
<html class=reftest-wait>
<title>View transitions: offscreen content with content-visibility auto</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:[email protected]">
<link rel="match" href="content-visibility-auto-shared-element-ref.html">
<script src="/common/reftest-wait.js"></script>
<style>
body {
  overflow: hidden;
}
.flex {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  align-items: flex-start;
}
.box {
  width: 100px;
  height: 500px;
  contain: paint;
}
.shared {
  background: green;
  border: 1px solid black;
  box-sizing: border-box;
}
.spacer {
  height: 3000px;
}
#hidden {
  width: 10px;
  height: 10px;
  background: red;
  contain: paint;
  view-transition-name: hidden;
}
.locked {
  content-visibility: auto;
  contain-intrinsic-size: 500px;
}

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

html::view-transition-group(*) { animation-duration: 0s; }
html::view-transition-new(*) { animation: unset; opacity: 0; }
html::view-transition-old(*) { animation: unset; opacity: 1; }
html::view-transition-group(root) { display: none; }
html::view-transition { background: pink }

</style>

<div class=flex>
 <div id=dst1 class=box></div>
 <div id=dst2 class=box></div>
 <div id=dst3 class=box></div>
</div>
<div id=hidden></div>
<div class=spacer></div>
<div id=content>
 <div id=lockme><div id=src1 class="box shared" style="view-transition-name: one">ancestor c-v</div></div>
 <div id=src2 class="box shared locked" style="view-transition-name: two">self c-v</div>
 <div id=src3 class="box shared" style="view-transition-name: three"><div class=locked>descendant c-v</div></div>
</div>

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

async function runTest() {
  lockme.classList.add("locked");
  document.startViewTransition(() => {
    content.remove();
    dst1.style = "view-transition-name: one";
    dst2.style = "view-transition-name: two";
    dst3.style = "view-transition-name: three";
    requestAnimationFrame(() => requestAnimationFrame(takeScreenshot));
  });
}
onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
</script>
chromium/third_party/blink/web_tests/external/wpt/css/css-view-transitions/content-visibility-auto-shared-element.html
