arkers onto the map
             */
            buildLocationList(stores);
            addMarkers();
        });

        /**
         * Add a marker to the map for every store listing.
         **/
        function addMarkers() {
            /* For each feature in the GeoJSON object above: */
            for (const marker of stores.features) {
                /* Create a div element for the marker. */
                const el = document.createElement('div');
                /* Assign a unique `id` to the m