geoJson.addData() event

I suggest to add an event for when data is added to a geoJson layer so plugins can hook into it if they want to work with that data.

Me from the viewpoint of the plugin currently can’t tell if any data is added via addData to the geoJson layer. Is that correct? Is there any workaround to this?

It came up with this issue in my drawing/editing plugin.

[jwoyame]

GeoJSON is internally a FeatureGroup, a layer that contains other layers. The layeradd and layerremove events are fired for the GeoJSON layer when its content layers are modified.

The addData function goes through each of the JSON objects in your array and calls addLayer on them, which fires layeradd for each one and provides you access to the new layer (via the layer property):

var geoJsonLayer = L.geoJson().addTo(map);
// called N times, where N is the number of objects in "json"
geoJsonLayer.on('layeradd', function (e) {
   // do something with e.layer
});
geoJsonLayer.addData(json);

[codeofsumit]

FYI: it worked perfectly