wpt/css/css-view-transitions/column-span-during-transition-doesnt-skip.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<html class=reftest-wait>
<title>View transitions: column-span elements in a fragmented container aren't skipped</title>
<meta name="fuzzy" content="maxDifference=0-1;totalPixels=0-100000">
<link rel="help" href="https://www.w3.org/TR/css-view-transitions-1/">
<link rel="author" href="mailto:mattwoodrow@apple.com">
<link rel="match" href="column-span-during-transition-doesnt-skip-ref.html">

<script src="/common/reftest-wait.js"></script>
<style>
#container {
  width: 500px;
  height: 500px;
}
.fragment {
  columns: 2;
}
#target {
  height: 200px;
  background: green;
  view-transition-name: target;
  column-span: all;
}

::view-transition {
  background: pink;
}
::view-transition-group(root) {
  animation-duration: 500s;
  visibility: hidden;
}
</style>
<div id=container>
  <div id=target></div>
</div>

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

function runTransition() {
  let t = document.startViewTransition(() => {
    container.classList.add("fragment")
  });
  t.ready.then(() => {
    requestAnimationFrame(() => {
      requestAnimationFrame(takeScreenshot);
    });
  });
}

requestAnimationFrame(() => requestAnimationFrame(runTransition))
</script>