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<html lang="en">
<head>
  <meta charset="utf-8">
  <title>propertyOf — missing</title>
</head>
<body>
  <h1>Missing path / vs _.get</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    var object = { a: [0, 1, 2] };
    var get = _.propertyOf(object);
    var lines = [
      "propertyOf → " + JSON.stringify(get("a[9]")),
      "get default → " + _.get(object, "a[9]", -1)
    ];
    document.getElementById("out").textContent = lines.join("\n");
  </script>
</body>
</html>

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Lodash _.propertyOf — missing path (Try It)