From f16df968e4ad97c2bb356f775ef4dd7a94e6498f Mon Sep 17 00:00:00 2001
From: wjdwithyou <asdf142857@gmail.com>
Date: Wed, 5 Oct 2016 04:46:15 +0900
Subject: [PATCH] prevent event propagation

---
 src/markerclusterer.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/markerclusterer.js b/src/markerclusterer.js
index 554fcec..b4f7200 100755
--- a/src/markerclusterer.js
+++ b/src/markerclusterer.js
@@ -1077,6 +1077,12 @@ ClusterIcon.prototype.onAdd = function() {
   var that = this;
   var isDragging = false;
   google.maps.event.addDomListener(this.div_, 'click', function(event) {
+    // Prevent event propagation
+    event.cancelBubble = true;
+    if (event.stopPropagation){
+      event.stopPropagation();
+    }
+
     // Only perform click when not preceded by a drag
     if (!isDragging) {
       that.triggerClusterClick(event);