css/css-view-transitions/nothing-captured.html

<!DOCTYPE html>
<html class=reftest-wait>
<title>View transitions: shared element with overflow</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<link rel="author" href="mailto:vmpstr@chromium.org">
<link rel="match" href="nothing-captured-ref.html">
<script src="/common/reftest-wait.js"></script>
<script src="/dom/events/scrolling/scroll_support.js"></script>
<style>
:root { view-transition-name: none; }
.target {
  width: 100px;
  height: 100px;
  contain: paint;
  background: blue;
  overflow-clip-margin: 50px;
}
.child {
  width: 200px;
  height: 200px;
  position: relative;
  top: 50px;
  left: 50px;
  background: green;
}

/* None of these should apply, so make everything red if it does */
html::view-transition-group(*) { animation-duration: 300s; }
html::view-transition-image-pair(*) { visibility: hidden }
html::view-transition { background: red; }
</style>

This text should appear unmodified, since the root isn't captured.
<div class=target>
  <div class=child>
  </div>
</div>

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

async function runTest() {
  await document.startViewTransition().ready;
  requestAnimationFrame(takeScreenshot);
}

onload = async () => {
  await waitForCompositorReady();
  runTest();
}

</script>