【OpenLayers笔记】绘制描边线

let layer = new VectorLayer(); //新建一个绘线层
    let feature = new Feature({
      geometry: new LineString([
        fromLonLat([114, 24]), //线的点坐标
        fromLonLat([114.01, 24.01]), //线的点坐标
        fromLonLat([114.02, 24]), //线的点坐标
        fromLonLat([114.02, 24.02]), //线的点坐标
      ]),
    });
    const textFill = new Fill({
      color: "#FFF",//线文本颜色
    });

    const borderStroke = new Stroke({
      color: "#FFF",
      width: 5,

      lineJoin: "round",
    });
    const lineStroke = new Stroke({
      color: "#FF0000",
      width: 2,
      lineJoin: "round",
    });

    feature.setStyle([
      new Style({
        stroke: borderStroke,
        text: new Text({
          fill: textFill,
          text:'线添加文本'
        }),
      }),
      new Style({ stroke: lineStroke }),
    ]);
    layer.setSource(
      new VectorSource({
        features: [feature],
      })
    );
    map.addLayer(layer); //把线的图层添加到地图中

效果：