yle="position: absolute; z-index: 9999; right: 20px; top: 20px">
    <button onclick="handleAdd()">添加</button>
    <button onclick="handleRemove()">移除</button>
  </div>
</div>
<script src="//cdn.jsdelivr.net/npm/leaflet/dist/leaflet-src.js"></script>
<script src="//cdn.jsdelivr.net/npm/dat.gui@0.7.6/build/dat.gui.js"></script>
<script src="../packages/leaflet/dist/leaflet-wind.js"></script>
<script>
  const map = new L.map('map', {
    // center: [113.53450137499999, 34.44104525],
    zoom: 0,
    c