From fb5e64413654e2e99eb8a65632b6b8193ab846c2 Mon Sep 17 00:00:00 2001
From: Caitlin Potter <caitpotter88@gmail.com>
Date: Thu, 19 Feb 2015 17:54:15 -0500
Subject: [PATCH] fix(patchViaPropertyDescriptor): disable if properties are
 not configurable

closes #42
---
 zone.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/zone.js b/zone.js
index deb5f3312..a2c327401 100644
--- a/zone.js
+++ b/zone.js
@@ -375,6 +375,14 @@ Zone.patch = function patch () {
 
 //
 Zone.canPatchViaPropertyDescriptor = function () {
+  if (!Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'onclick') &&
+      typeof Element !== 'undefined') {
+    // WebKit https://bugs.webkit.org/show_bug.cgi?id=134364
+    // IDL interface attributes are not configurable
+    var desc = Object.getOwnPropertyDescriptor(Element.prototype, 'onclick');
+    if (desc && !desc.configurable) return false;
+  }
+
   Object.defineProperty(HTMLElement.prototype, 'onclick', {
     get: function () {
       return true;