HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>walk log</title>
</head>
<body>
  <ul id="fruit">
    <li>Apple</li>
    <li>Banana</li>
    <li>Cherry</li>
  </ul>
  <pre id="out">Waiting...</pre>
  <script>
    var it = document.createNodeIterator(
      document.getElementById("fruit"),
      NodeFilter.SHOW_ELEMENT,
      {
        acceptNode: function (node) {
          return node.nodeName === "LI" ? NodeFilter.FILTER_ACCEPT : NodeFilter.FILTER_REJECT;
        }
      }
    );
    var log = [];
    var node;
    while ((node = it.nextNode())) {
      log.push(node.textContent + " " + it.pointerBeforeReferenceNode);
    }
    document.getElementById("out").textContent = log.join("\n");
  </script>
</body>
</html>

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pointerBeforeReferenceNode — walk log (Try It)