File: cancel-animation-shadow-slot-invalidation.html

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<!doctype html>
<html class="reftest-wait">
<title>CSS Animations Test: Cancel animation for target moving out of flat tree and style invalidation</title>
<link rel="help" href="https://drafts.csswg.org/css-animations/#eventdef-animationevent-animationcancel">
<link rel="help" href="https://crbug.com/1093747">
<link rel="match" href="../reference/pass_if_pass_below.html">
<script src="/common/reftest-wait.js"></script>
<style>
  @keyframes anim {
    from { color: red; }
    to { color: green; }
  }
  #anim { animation: anim 100s; }
  .none { display: none; }
</style>
<p>Test passes if there is the word "PASS" below.</p>
<div id="host"><span id="anim">FAIL</span></div>
<div id="dirty" class="none">PASS</div>
<script>
  const root = host.attachShadow({mode:"open"});
  root.innerHTML = "<slot></slot>";
  requestAnimationFrame(() => {
    root.firstChild.name = "skip-slot";
    dirty.className = "";
    takeScreenshot();
  });
</script>