使选择选项显示在Leaflet地图顶部

// 创建一个包含选择选项的下拉菜单
var selectOptions = [
  { label: "选项1", value: "option1" },
  { label: "选项2", value: "option2" },
  { label: "选项3", value: "option3" }
];

var selectElement = L.DomUtil.create('select', 'leaflet-top leaflet-right');
selectOptions.forEach(function(option) {
  var optionElement = L.DomUtil.create('option', '', selectElement);
  optionElement.innerHTML = option.label;
  optionElement.value = option.value;
});

// 创建一个Leaflet控件，并将下拉菜单添加到控件中
var customControl = L.control({ position: 'topright' });
customControl.onAdd = function(map) {
  return selectElement;
};
customControl.addTo(map);