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<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>isEmptyObject — delete keys</title>

</head>

<body>

  <pre id="out"></pre>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    (function () {

      var cache = { temp: true, draft: true };

      var before = $.isEmptyObject(cache);

      delete cache.temp;

      delete cache.draft;

      document.getElementById("out").textContent = [

        "before delete: " + before,

        "after delete: " + $.isEmptyObject(cache)

      ].join("\n");

    })();

  </script>

</body>

</html>

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jQuery.isEmptyObject() — After Delete (Try It)