From b6f7fb6834b021ba2912e251c1bde304dd6a11f5 Mon Sep 17 00:00:00 2001
From: StevenHong <shong@coremail.cn>
Date: Thu, 11 Apr 2024 01:20:32 +0800
Subject: [PATCH 1/3] fix close release destroyObserver

---
 src/iframeResizer.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/iframeResizer.js b/src/iframeResizer.js
index 4ea1d309a..d413c8c41 100644
--- a/src/iframeResizer.js
+++ b/src/iframeResizer.js
@@ -68,7 +68,8 @@
       onScroll: function () {
         return true
       }
-    })
+    }),
+    destroyObserver
 
   function getMutationObserver() {
     return (
@@ -729,6 +730,8 @@
     chkEvent(iframeId, 'onClosed', iframeId)
     log(iframeId, '--')
     removeIframeListeners(iframe)
+    destroyObserver && destroyObserver.disconnect()
+    destroyObserver = null
   }
 
   function getPagePosition(iframeId) {
@@ -1146,11 +1149,12 @@
         destroyObserver.observe(iframe.parentNode, {
           childList: true
         })
+        return destroyObserver
       }
 
       var MutationObserver = getMutationObserver()
       if (MutationObserver) {
-        createDestroyObserver(MutationObserver)
+        destroyObserver = createDestroyObserver(MutationObserver)
       }
 
       addEventListener(iframe, 'load', iFrameLoaded)

From 6c3b622c9f8bad0be77bd4811cb2e9033d526afa Mon Sep 17 00:00:00 2001
From: Steven <shong@coremail.cn>
Date: Mon, 15 Apr 2024 09:22:02 +0800
Subject: [PATCH 2/3] chore: reorder by alphabetical

---
 src/iframeResizer.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/iframeResizer.js b/src/iframeResizer.js
index d413c8c41..0a83bc319 100644
--- a/src/iframeResizer.js
+++ b/src/iframeResizer.js
@@ -13,6 +13,7 @@
   if (typeof window === 'undefined') return // don't run for server side render
 
   var count = 0,
+    destroyObserver,
     logEnabled = false,
     hiddenCheckEnabled = false,
     msgHeader = 'message',
@@ -68,8 +69,7 @@
       onScroll: function () {
         return true
       }
-    }),
-    destroyObserver
+    })
 
   function getMutationObserver() {
     return (

From 0e3824e1941184ad74a4b0e2bf76c82cec811301 Mon Sep 17 00:00:00 2001
From: StevenHong <shong@coremail.cn>
Date: Tue, 16 Apr 2024 22:47:00 +0800
Subject: [PATCH 3/3] eslint fix

---
 src/iframeResizer.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/iframeResizer.js b/src/iframeResizer.js
index 0a83bc319..754a2a78e 100644
--- a/src/iframeResizer.js
+++ b/src/iframeResizer.js
@@ -730,8 +730,10 @@
     chkEvent(iframeId, 'onClosed', iframeId)
     log(iframeId, '--')
     removeIframeListeners(iframe)
-    destroyObserver && destroyObserver.disconnect()
-    destroyObserver = null
+    if (destroyObserver) {
+      destroyObserver.disconnect()
+      destroyObserver = null  
+    }
   }
 
   function getPagePosition(iframeId) {
@@ -1133,7 +1135,7 @@
 
       function createDestroyObserver(MutationObserver) {
         if (!iframe.parentNode) {
-          return
+          return null
         }
 
         var destroyObserver = new MutationObserver(function (mutations) {