From 94346628e4d37fe95e45ba8476dbf480c3ea6627 Mon Sep 17 00:00:00 2001
From: Zhenfei You <hello@imyzf.com>
Date: Thu, 3 Jan 2019 15:42:35 +0800
Subject: [PATCH] [jsfm] fix: judge if event is not defined (#1992)

---
 runtime/bridge/receiver.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/runtime/bridge/receiver.js b/runtime/bridge/receiver.js
index 22b29f2bac..c24cfffce8 100644
--- a/runtime/bridge/receiver.js
+++ b/runtime/bridge/receiver.js
@@ -23,7 +23,7 @@ function fireEvent (document, nodeId, type, event, domChanges, params) {
   const el = document.getRef(nodeId)
   if (el) {
     return document.fireEvent(el, type, event, domChanges, params)
-  } else {
+  } else if (event) {
     event._nodeId = nodeId
     return document.fireEvent(document.getRef('_documentElement'), type, event, domChanges, params)
   }