HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>nextElementSibling null</title>
</head>
<body>
  <div id="first">One</div>
  <div id="last">Two</div>
  <pre id="out"></pre>
  <script>
    var last = document.getElementById("last");
    var lines = [];
    lines.push(String(last.nextElementSibling));
    lines.push(String(last.nextSibling === null || last.nextSibling.nodeName === "#text"));
    document.getElementById("out").textContent = lines.join("\n");
  </script>
</body>
</html>

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Element.nextElementSibling � null (Try It)