From bab07acd694d9f34fe34db09a4c64f2ea04aa5ef Mon Sep 17 00:00:00 2001
From: surunzi <surunzi@foxmail.com>
Date: Wed, 8 Nov 2017 18:45:51 +0800
Subject: [PATCH] Fix: Performance timing unsupported #40

---
 src/Network/Network.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Network/Network.js b/src/Network/Network.js
index a711ba2..8ac3bfe 100644
--- a/src/Network/Network.js
+++ b/src/Network/Network.js
@@ -170,10 +170,10 @@ export default class Network extends Tool
     _getPerformanceTimingData()
     {
         let performance = this._performance;
-
         if (!performance) return;
 
         let timing = performance.timing;
+        if (!timing) return;
 
         let data = [];