testing/web-platform/tests/css/css-view-transitions/old-content-captures-clip-path.html


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<!DOCTYPE html>
<html class=reftest-wait>
<title>View transitions: capture clip-path elements</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="old-content-captures-clip-path-ref.html">
<meta name="fuzzy" content="maxDifference=0-1; totalPixels=0-500">
<script src="/common/reftest-wait.js"></script>
<style>
.box {
  color: red;
  background: lightblue;
  width: 100px;
  height: 100px;
  contain: paint;
  position: absolute;
  font-size: 30pt;
}
#e1 {
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  top: 20px;
  left: 20px;
  view-transition-name: e1;
}

div.dst { background: lightgreen; }
/* We're verifying what we capture, so just display the old contents for 5 minutes.  */
html::view-transition-group(*) { animation-duration: 300s; }
html::view-transition-new(*) { animation: unset; opacity: 0; }
html::view-transition-old(*) { animation: unset; opacity: 1; }
/* hide the root so we show transition background to ensure we're in a transition */
html::view-transition-group(root) { animation: unset; opacity: 0; }
html::view-transition { background: lightpink; }
</style>
<div id=e1 class=box></div>
<script>
failIfNot(document.startViewTransition, "Missing document.startViewTransition");

async function runTest() {
  document.startViewTransition(() => {
    e1.classList.add("dst");
    requestAnimationFrame(() => requestAnimationFrame(takeScreenshot));
  });
}
onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
</script>