arcgis js清除图层

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-vector"
    });

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

    // 创建一个示例图层
    var featureLayer = new FeatureLayer({
        url: "https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Landscape_Trees/FeatureServer/0"
    });

    // 将图层添加到地图
    map.add(featureLayer);

    // 清除图层的函数
    function clearLayer() {
        if (featureLayer) {
            map.remove(featureLayer);
            console.log("图层已清除");
        }
    }

    // 假设在某个按钮点击事件中调用 clearLayer 函数
    document.getElementById("clearButton").addEventListener("click", clearLayer);
});