Fetching ski resort data

App.js

async componentDidMount() {
    // trigger data load from openskimap
    axios
      .get(`//tiles.skimap.org/geojson/ski_areas.geojson`)
      .then((res) => {
        const resorts =
          res.data.features.map((resort) => ({
            id: resort.properties.id,
            point: getPointForResort(resort),
            name: resort.properties.name,
            ...
            isEpic: false,
            isIkon: false,
          })) || [];

        // trigger data load from Firebase to get Epic/Ikon data
        const ikonEpicFlags = firebase.database().ref();
        ikonEpicFlags.on("value", (snapshot) => {
          let epicIkon = snapshot.val();
          let currentResorts = resorts;
          epicIkon.forEach(function (epicIkonResort) {
            // find resort ID within currentResorts
            let matchedResort = currentResorts.find(
              (o) => o.name === epicIkonResort.name
            );

            // set isIkon and isEpic within currentResorts
            if (matchedResort) {
              matchedResort.isEpic = epicIkonResort.epic === 1 ? true : false;
              matchedResort.isIkon = epicIkonResort.ikon === 1 ? true : false;
            }
          });

          this.setState({
            resorts: currentResorts,
          });
        });
      });
  }