gmap3 map zoom cluster click

To zoom into a cluster, you double click, else single click

It’s much better to add the event to the cluster itself.

{
  action: 'addMarkers',
  radius:40,
  maxZoom:10,
  markers: content.Destination,
  clusters:{
    // This style will be used for clusters with more than 0 markers
    0: {
      content: '
CLUSTER_COUNT
',
      width: 52,
      height: 51
    },
    // This style will be used for clusters with more than 20 markers
    20: {
      content: '
CLUSTER_COUNT
',
      width: 52,
      height: 51
    },
    // This style will be used for clusters with more than 50 markers
    40: {
      content: '
CLUSTER_COUNT
',
      width: 52,
      height: 51
    }
  },
  cluster:{
    events: {
      click:function(cluster, event, data) {
        cluster.map.panTo(data.latLng);
        cluster.map.setZoom(cluster.map.getZoom()+2);
      }
    }
  }
}