From dae7e4182fbbb41e599953cc22e5d54dbb164070 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Wed, 6 Feb 2019 15:57:06 -0500
Subject: [PATCH] fix: skip microtask fix if event is fired from different
 document

fix #9448
---
 src/platforms/web/runtime/modules/events.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/platforms/web/runtime/modules/events.js b/src/platforms/web/runtime/modules/events.js
index 2721a1fd5d5..d030f55d3bc 100644
--- a/src/platforms/web/runtime/modules/events.js
+++ b/src/platforms/web/runtime/modules/events.js
@@ -60,7 +60,12 @@ function add (
     const attachedTimestamp = currentFlushTimestamp
     const original = handler
     handler = original._wrapper = function (e) {
-      if (e.timeStamp >= attachedTimestamp) {
+      if (
+        e.timeStamp >= attachedTimestamp ||
+        // #9448 bail if event is fired in another document in a multi-page
+        // electron/nw.js app
+        e.target.ownerDocument !== document
+      ) {
         return original.apply(this, arguments)
       }
     }