HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>plugin cleanup</title>

  <style>

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

    #panel { padding: 16px; border: 2px solid #6366f1; border-radius: 8px; background: #eef2ff; }

    #panel.is-active { border-color: #16a34a; background: #dcfce7; }

    button { margin-top: 12px; padding: 10px 16px; background: #dc2626; color: #fff; border: none; border-radius: 6px; cursor: pointer; }

    #log { margin-top: 12px; font-family: ui-monospace, monospace; color: #4338ca; }

  </style>

</head>

<body>

  <div id="panel" class="is-active">Widget panel (version stored as property)</div>

  <button type="button" id="destroy">Destroy widget</button>

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

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

  <script>

    var $panel = $("#panel");

    $panel.prop("widgetVersion", 2);

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

      $panel.removeProp("widgetVersion").removeClass("is-active");

      $("#log").text("widgetVersion: " + $panel.prop("widgetVersion"));

    });

  </script>

</body>

</html>

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jQuery .removeProp() — plugin cleanup (Try It)