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<html lang="en">
<head>
  <meta charset="utf-8">
  <title>get — nullish</title>
</head>
<body>
  <h1>null vs undefined</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    var data = {
      nickname: null,
      score: 0,
      missing: undefined
    };
    var lines = [];
    lines.push(String(_.get(data, "nickname", "guest")));
    lines.push(String(_.get(data, "score", 100)));
    lines.push(JSON.stringify(_.get(data, "missing", "n/a")));
    document.getElementById("out").textContent =
      lines.join(String.fromCharCode(10));
  </script>
</body>
</html>

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Lodash _.get — null vs undefined (Try It)