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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>entries Array.from</title>
</head>
<body>
  <pre id="out">Waiting...</pre>
  <script>
    var node = document.createElement("div");
    node.appendChild(document.createElement("p"));
    node.appendChild(document.createTextNode("hey"));
    node.appendChild(document.createElement("span"));
    var pairs = Array.from(node.childNodes.entries());
    document.getElementById("out").textContent =
      "length: " + pairs.length +
      "\n" + pairs[0][0] + " " + pairs[0][1].nodeName +
      "\n" + pairs[1][0] + " " + pairs[1][1].nodeName +
      "\n" + pairs[2][0] + " " + pairs[2][1].nodeName;
  </script>
</body>
</html>

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NodeList.entries() — Array.from (Try It)