<!DOCTYPE html>
<title>Invalid animation range</title>
<body onload="runTest()">
  <div id="target"></div>
</body>
<script src="../../web-animations/testcommon.js"></script>
<script>
  async function runTest() {
    const anim = target.animate(undefined, {rangeStart: "initial" });
    await waitForNextFrame();
    await waitForNextFrame();
  }
</script>
