Amap is referenced in vue to render data points with markerList. How to insert an asynchronous operation in getInfoWindow?
ordinary words show a pop-up window like this:

    initMarkerList() {
      let _this = this;
      map.clearMap();
      AMapUI.loadUI(["misc/MarkerList", "overlay/SimpleInfoWindow"], function(
        MarkerList,
        SimpleInfoWindow
      ) {
        var markerList = new MarkerList({
            //
          getInfoWindow: function(data, context, recycledInfoWindow) {
            let $data = data.extData;
            let str = ``;
            _this.$http
              .post(_this.page.root + "Cleandot/QueryCleandotModel", {
                ID: $data["ID"]
              })
              .then(data => {
                str = `test`;
              })
              .then(() => {
              //
                if (recycledInfoWindow) {
                  recycledInfoWindow.setInfoTitle($data["Name"]);
                  recycledInfoWindow.setInfoBody(str);

                  return recycledInfoWindow;
                }
                return new SimpleInfoWindow({
                  infoTitle: $data["Name"],
                  infoBody: str,
                  offset: new AMap.Pixel(0, -20)
                });
              });
          }
        });

        markerList.render(_this.markers);
      });
    },

I am very rusty asynchronously. Please give me some advice.