mapbox点击路线高亮

用mapbox绘制多条路线，如何实现点击某条线，实现这条线的高亮呢？

export class MapComponent {
  public pathLine: string = 'path-line';
  public sourceNames: any = new Set();
  initPathLine() { //初始化
    if (!this.map.getSource(this.pathLine)) {
      this.map.addSource(this.pathLine, {
        type: 'geojson',
        data: {
          type: 'FeatureCollection',
          features: [],
        },
      });
      this.sourceNames.add(this.pathLine);//收集信息
    }
    if (!this.map.getLayer(this.pathLine + '-layer')) {
      this.map.addLayer({
        type: 'line',
        source: this.pathLine,
        id: this.pathLine + '-layer',
        paint: {
          'line-color': '#01c76f',
          'line-width': 6,
        },
      });

      this.sourceNames.add(this.pathLine + '-layer');//收集信息
    }
  }
  createPathLine(data: any) {
    this.initPathLine();//初始化信息
    if (this.map.getSource(this.pathLine)) {
      const arr: any = [];
      data.map((item: any, index: number) => {
        //创建路线
        const feature: any = {
          type: 'Feature',
          properties: {//属性信息,这里储存的序号index，也可以是别的，在changeLineColor方法用的到
            category: index, //category是自定义的键名，可以随便写
          },
          geometry: {
            coordinates: item.lineCoordinates,
            type: 'LineString',
          },
        };
        arr.push(feature);
      });
      //赋值操作
      if (this.map.getSource(this.pathLine)) {
        this.map.getSource(this.pathLine).setData({ 
          type: 'FeatureCollection',
          features: arr,
        });

      }
      //视角飞入
      this.map.flyTo({
        center: data[0]['lineCoordinates'][0],
        zoom: 12,
      });
    }
  }
  changeLineColor(index:number){ //高亮
    this.map.setPaintProperty(
      this.pathLine + '-layer',
      'line-opacity',
      ['match', ['get', 'category'], index, 1, 0.5] //根据category属性进行筛选，符合条件的就是1，否则就是0.5
    );
  }
  clearData() {//清除数据
    
    if (this.sourceNames.size > 0) {
      console.log(this.sourceNames);
      this.sourceNames.forEach((v: any) => {
        //注意顺序，必须先清除layer
        console.log(v);
        if (this.map.getLayer(v)) {
          this.map.removeLayer(v);
        }
        if (this.map.getSource(v)) {
          this.map.removeSource(v);
        }
      });
      this.sourceNames.clear(); //清空容器
    }
  }
}