arcgis js清除所有图层

require([
  "esri/Map",
  "esri/views/MapView",
  "esri/layers/FeatureLayer"
], function(Map, MapView, FeatureLayer) {
  // 创建地图实例
  var map = new Map({
    basemap: "streets"
  });

  // 创建地图视图实例
  var view = new MapView({
    container: "viewDiv",
    map: map,
    center: [-118.244, 34.052],
    zoom: 12
  });

  // 添加一个示例图层
  var featureLayer = new FeatureLayer({
    url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Landscape_Trees/FeatureServer/0"
  });

  map.add(featureLayer);

  // 清除所有图层的函数
  function clearAllLayers() {
    map.layers.removeAll();
  }

  // 假设我们有一个按钮来触发清除操作
  document.getElementById("clearButton").addEventListener("click", clearAllLayers);
});

function clearAllLayers() {
  map.layers.removeAll().then(function() {
    console.log("所有图层已清除");
    view.when(function() {
      console.log("视图已更新");
    });
  }).catch(function(error) {
    console.error("清除图层时出错:", error);
  });
}