snapshot-containing-block-fixed-descendants.html

<!DOCTYPE html>
<html class=reftest-wait dir="rtl">
<title>View transitions: use snapshot containing block for fixed position descendants</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-2/">
<link rel="author" href="mailto:[email protected]">
<link rel="match" href="snapshot-containing-block-fixed-descendants-ref.html">
<meta name="fuzzy" content="snapshot-containing-block-fixed-descendants-ref.html:0-20;0-100">

<script src="/common/reftest-wait.js"></script>
<style>
:root {
  view-transition-name: none;
  background-color: red;
}

body {
  height: 400vh;
}

div {
  position: absolute;
  left: 200px;
  top: 300px;
  width: 100px;
  height: 100px;

  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;

  background: darkseagreen;
  view-transition-name: target;
}

::view-transition-group(target) {
  position: fixed;
  animation-duration: 50s;
}

::view-transition {
  /* Relative and shifted to ensure fixed group pseudos aren't contained by
   * this pseudo */
  position: relative;
  display: block;
  right: 100px;
  top: 200px;
  height: 100%;
  width: 100%;
  background-color: limegreen;
}

</style>

<div id="target">TARGET</div>

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

async function runTest() {
  let transition = document.startViewTransition();
  await transition.ready;
  takeScreenshot();
}

onload = () => {
  // Use an left-hand side scrollbar so that the regular fixed position
  // containing block differs from the snapshot containing block.
  if (window.internals) {
    window.internals.settings.setPlaceRTLScrollbarsOnLeftSideInMainFrame(true);
  }
  requestAnimationFrame(() => requestAnimationFrame(runTest));
}
</script>
chromium/third_party/blink/web_tests/wpt_internal/view-transition/snapshot-containing-block-fixed-descendants.html
