HereMaps GeoJSON Polygon Click Read Properties

my question is as follows. What I have I have a GeoJSON feature collection with Polygons and custom properties GeoJSON is loaded into the Here maps What I want I want to detect

Solution 1:

Here is the example code to get the property value of the GeoJSON Polygon on click.

reader = new H.data.geojson.Reader('/path/to/geojson/file.json');
  reader.parse();
  map.addLayer(reader.getLayer());

  reader.getLayer().getProvider().addEventListener("tap", function(e) {
    if(e.target instanceof H.map.Polygon) {
      console.log('Custom property value: ', e.target.getData().properties.customProp);
    }
  }); 

GeoJSON documentation can be found here: https://developer.here.com/documentation/maps/topics_api/h-data-geojson-reader.html