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<!DOCTYPE html>
<html class="reftest-wait reftest-no-flush">
<style>
html {
  /* Suppress scrollbars to avoid periodical unthrottling for transform */
  /* animations on the compositor. */
  overflow: hidden;
}
body {
  margin: 0px;
  padding: 0px;
}

@keyframes anim {
  0% { scale: 1.9; }
  100% { scale: 1.9; }
}
#target {
  position: absolute;
  left:100px;
  top:100px;
  scale:0.05;
}
#rotate {
  transform: rotate(180deg);
  transform-origin: 50% 50%;
}
</style>
<body>
<div id="target">
  <div id="rotate">
    <svg width="100" height="100">
      <g id="g">
        <circle cx="100" cy="100" r="40" style="fill: rgb(200, 20, 20);"></circle>
      </g>
    </svg>
  </div>
</div>


<script>
document.addEventListener('MozReftestInvalidate', () => {
  // Set a bit longer animation delay to avoid painting the initial animation
  // style on the main thread.
  target.style.animation = "anim 100s 1s";
  target.addEventListener("animationstart", () => {
    requestAnimationFrame(() => {
      requestAnimationFrame(() => {
        document.documentElement.classList.remove("reftest-wait");
      });
    });
  });
}, { once: true });
</script>
</body>
</html>