leaflet - manually cluster markers

问题

I need to manually cluster/uncluster few markers on the map (not automatically by zoom)

is there a way to tell Leaflet.markercluster which markers to cluster manually and not automatically by zoom.

I tried manipulating the L.markerClusterGroup layer internal cluster._gridClusters and cluster._gridUnclustered which holds an array of all the zooms and markers/clusters in each. but changing the objects seems to do nothing and not represented on map.

a solution example would be:

selectedMarkers = [marker1,marker2,marker3];
map.cluster(selectedMarkers);
map.uncluster(selectedMarkers);

please help.

来源：https://stackoverflow.com/questions/49132633/leaflet-manually-cluster-markers