mapbox number of items returned by getJSON

Question

I am placing multiple Clustered locations on the map. How can I retrieve number of total of featured returned?

Here is my code:

<script>
$.getJSON("datafile.json", function(data) {
    var geojson = L.geoJson(data, {
      onEachFeature: function (feature, layer) {
        layer.setIcon(L.mapbox.marker.icon({'marker-symbol': 'circle-stroked', 'marker-color': '59245f'}));
		var popUp="pouptext";
        layer.bindPopup(popUp,{
        closeButton: true,
        minWidth: 320
    });
      }
    });
    markers.addLayer(geojson);
	var map = L.mapbox.map('map', 'mapbox.streets') .setView([42, -90], 4);
    baseLayer.addTo(map);
    markers.addTo(map);
  });
</script>

Thanks.

Answer 1

Assuming that datafile.json contains a GeoJSON FeatureCollection, the number of features would be stored in the data.features.length property.