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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>isSafeInteger vs isInteger</title>
</head>
<body>
  <h1>vs isInteger</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    var n = Number.MAX_SAFE_INTEGER + 1;
    document.getElementById("out").textContent =
      "isInteger: " + _.isInteger(n) + "\n" +
      "isSafeInteger: " + _.isSafeInteger(n);
  </script>
</body>
</html>

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Lodash _.isSafeInteger vs _.isInteger (Try It)