From 46bd85f24fc94248462c9084230e06656cdf0ec5 Mon Sep 17 00:00:00 2001
From: HikaruTakakura <takakurahikaru@gmail.com>
Date: Mon, 28 Sep 2020 23:25:39 +0900
Subject: [PATCH] prevent adding marker twice to `$clusterObject`

---
 gmap-custom-marker.vue | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gmap-custom-marker.vue b/gmap-custom-marker.vue
index 679038b..cefd871 100644
--- a/gmap-custom-marker.vue
+++ b/gmap-custom-marker.vue
@@ -43,10 +43,11 @@ export default {
   },
   methods: {
     afterCreate(inst) {
-      if (this.$clusterPromise) {
+      if (this.$clusterPromise && !this.isMarkerAdded) {
         this.$clusterPromise.then(co => {
           co.addMarker(inst);
           this.$clusterObject = co;
+          this.isMarkerAdded = true;
         });
       }
     }