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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>isBuffer — ArrayBuffer</title>
</head>
<body>
  <h1>vs ArrayBuffer</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      var ab = new ArrayBuffer(8);
      function run() {
        document.getElementById("out").textContent =
          "isBuffer: " + Buffer.isBuffer(ab) + "\n" +
          "isArrayBuffer: " + _.isArrayBuffer(ab);
      }
      if (typeof Buffer !== "undefined") {
        run();
      } else {
        import("https://cdn.jsdelivr.net/npm/buffer@6.0.3/+esm")
          .then(function (m) {
            window.Buffer = m.Buffer;
            run();
          })
          .catch(function (err) {
            document.getElementById("out").textContent =
              "Polyfill error: " + (err && err.message ? err.message : String(err));
          });
      }
    })();
  </script>
</body>
</html>

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Lodash _.isBuffer vs _.isArrayBuffer (Try It)