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  <title>Lodash isNil — falsy</title>
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  <h1>_.isNil — zero, empty string, NaN</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      document.getElementById("out").textContent =
        "zero: " + _.isNil(0) + "\n" +
        "emptyStr: " + _.isNil("") + "\n" +
        "nan: " + _.isNil(NaN);
    })();
  </script>
</body>
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Lodash _.isNil — not nil falsy (Try It)