HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>before detach</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 480px; }

    #temp { padding: 12px; background: #fef3c7; border: 1px solid #f59e0b; border-radius: 6px; }

    button { margin-top: 12px; padding: 10px 16px; background: #b45309; color: #fff; border: none; border-radius: 6px; cursor: pointer; }

    #log { margin-top: 12px; color: #92400e; }

  </style>

</head>

<body>

  <div id="temp">Temporary node with object property</div>

  <button type="button" id="go">removeProp then remove()</button>

  <div id="log"></div>

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

  <script>

    $("#go").on("click", function() {

      var $el = $("#temp");

      $el.prop("tempRef", { id: 99 });

      $el.removeProp("tempRef");

      $el.remove();

      $("#log").text("Removed element; tempRef cleared first (prefer .data() for objects today)");

    });

  </script>

</body>

</html>

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jQuery .removeProp() — before detach (Try It)