.isConnected, 'p#4 is not connected after clone');

      delete data.a;
      test(!p4Clone.isConnected, 'p#4 clone is not connected');

      data.a = true;
      test(
        document.getElementById('4') instanceof HTMLParagraphElement,
        'p#4 found after delete and set'
      );
      delete data.a;
    </script>

    <p id="5" sb-mark="b">notset</p>
    <script>
      const p5 = document.getElementById('5');
      test(p5.innerText === 'notset', 'p#5 data not set');
      data.a = 'stuff';
     