基于arcgis js 4 动态在客户端渲染featurelayer数据,实现同一个图层的数据的增加与删除
html,body{padding:0;margin:0;height:100%;}letlayer=null;letfeatures=[];letlabelClass=null;letmap=null;require(["esri/Map","esri/views/MapView","esri/Graphic","esri/layers/GraphicsLayer","esri/widgets/