new-content-transform-position-fixed-ref.html

<!DOCTYPE html>
<html class="reftest-wait">
<title>View transitions: computed transform for position fixed elements doesn't include scroll pos (ref)</title>
<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
<style>
.box {
  background: lightblue;
  width: 100px;
  height: 100px;
  position: fixed;
}
body { background: lightpink; }
</style>
<div class=box></div>
<div style="height: 1000px;"></div>
<script>
  addEventListener("scroll", () => {
    requestAnimationFrame(() => {
      requestAnimationFrame(() => {
        document.documentElement.classList.remove("reftest-wait");
      });
    });
  }, { once: true, capture: true });
  document.documentElement.scrollTop = 500;
</script>
</html>

chromium/third_party/blink/web_tests/external/wpt/css/css-view-transitions/new-content-transform-position-fixed-ref.html