在完整窗口中显示jquery ui模式对话框

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script src="https://code.jquery.com/ui/1.13.0/jquery-ui.min.js"></script>

<div id="dialog" style="display: none;">
  <p>This is a jQuery UI mode dialog.</p>
  <button id="close-btn">Close</button>
</div>

#dialog {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
}

#dialog p {
  font-size: 24px;
  font-weight: bold;
  text-align: center;
  margin: 20px;
}

#dialog button {
  background-color: #4CAF50;
  color: white;
  padding: 12px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 16px;
}

#dialog button:hover {
  background-color: #45a049;
}

function showDialog() {
  var dialog = $("#dialog");
  if (dialog.is(":visible")) {
    dialog.hide();
  } else {
    dialog.show();
  }
}

$("#close-btn").click(function() {
  $("#dialog").hide();
});