text: import {
      Map,
      GCJ02, NoopProjection,
      LatLngType,
      Point, GeometryType,
      Polyline,
      SimpleFillSymbol,
      FeatureClass,
      FeatureLayer,
      SimpleRenderer,
      CategoryRenderer,
      CategoryRendererItem,
      Field,
      Label,
      Tooltip,
      FieldType,
      Graphic,
      SimpleMarkerSymbol,
      Feature,
      SimpleTextSymbol,
      ArrowSymbol,
      SimplePointSymbol,
      GraphicLayer,
      SimpleLineSymbol, PointAnimation
  } from "../dist";
  
  window.load = () => {
  
  
      const map = new Map("foo");
      map.setProjection(new NoopProjection());
      //画网格线
      const xLayer = new GraphicLayer();
      map.addLayer(xLayer);
      const lngSymbol = new SimpleLineSymbol();
      lngSymbol.strokeStyle = "#0000ff";
      for (let i = -900; i <= 900; i = i + 100){
          const line = new Polyline([[i, -500], [i, 500]]);
          const graphic = new Graphic(line, lngSymbol);
          xLayer.add(graphic);
      }
      //画网格线
      const yLayer = new GraphicLayer();
      map.addLayer(yLayer);
      const latSymbol = new SimpleLineSymbol();
      latSymbol.strokeStyle = "#4d9221";
      for (let j = -500; j <= 500; j = j + 100){
          const line = new Polyline([[-900, j], [900, j]]);
          const graphic = new Graphic(line, latSymbol);
          yLayer.add(graphic);
      }
      //画原点
      const pointLayer = new GraphicLayer();
      map.addLayer(pointLayer);
      const pointSymbol = new SimplePointSymbol();
      pointSymbol.radius = 10;
      pointSymbol.fillStyle = "#de77ae";
      pointSymbol.strokeStyle = "#c51b7d";
      const point = new Point(0, 0);
      const graphic = new Graphic(point, pointSymbol);
      pointLayer.add(graphic);
  
      //画XY轴
      const arrowSymbol = new ArrowSymbol();
  
      const axisLayer = new GraphicLayer();
      map.addLayer(axisLayer);
      const xLine = new Polyline([[-1000, 0], [1000, 0]]);
      const xAxis = new Graphic(xLine, arrowSymbol);
      axisLayer.add(xAxis);
      const yLine = new Polyline([[0, -600], [0, 600]]);
      const yAxis = new Graphic(yLine, arrowSymbol);
      axisLayer.add(yAxis);
  
      map.setView([0, 0], 3);
  
  }
  