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  <title>Lodash isWeakSet — Set vs WeakSet</title>
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  <h1>_.isWeakSet — Set vs WeakSet</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 =
        "set: " + _.isWeakSet(new Set()) + "\n" +
        "weakMap: " + _.isWeakSet(new WeakMap());
    })();
  </script>
</body>
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Lodash _.isWeakSet — Set vs WeakSet (Try It)