From 6e3ac78dbb7e110ba73eadfcc2af6fd6b7ac1cca Mon Sep 17 00:00:00 2001
From: Wayne Van Son <waynevanson@gmail.com>
Date: Thu, 24 Sep 2020 13:41:39 +0000
Subject: [PATCH] fix(plugins): ignore moutning duplicate plugins

closes #1581
---
 packages/sortable/src/PluginManager.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/sortable/src/PluginManager.ts b/packages/sortable/src/PluginManager.ts
index 70ddc9cac..5e62d50ca 100644
--- a/packages/sortable/src/PluginManager.ts
+++ b/packages/sortable/src/PluginManager.ts
@@ -12,7 +12,11 @@ const pluginManager = {
         plugin[option] = defaults[option];
       }
     }
-    plugins.push(plugin);
+
+    //  only add plugins once, even if they're mounted multiple times
+    if (!plugins.map((p) => p.name).includes(plugin.name)) {
+      plugins.push(plugin);
+    }
   },
   pluginEvent(eventName, sortable, evt) {
     this.eventCanceled = false;