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<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Lodash toNumber — nullish</title>
</head>
<body>
  <h1>_.toNumber — nullish &amp; Symbol</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 =
        "null:        " + _.toNumber(null) + "\n" +
        "undefined:   " + _.toNumber(undefined) + "\n" +
        "'':          " + _.toNumber("") + "\n" +
        "true:        " + _.toNumber(true) + "\n" +
        "false:       " + _.toNumber(false) + "\n" +
        "Symbol():    " + _.toNumber(Symbol());
    })();
  </script>
</body>
</html>

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Lodash _.toNumber — nullish, booleans, Symbol (Try It)