From 832baa0eaf18af53e2ae121cdca8333d4e71ef8e Mon Sep 17 00:00:00 2001
From: Misko Hevery <misko@hevery.com>
Date: Wed, 14 Sep 2016 14:28:57 -0700
Subject: [PATCH] fix(fetch): correct chrome not able to load about://blank

Closes #444
---
 lib/zone.ts | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/zone.ts b/lib/zone.ts
index 534516310..f8b6c92d1 100644
--- a/lib/zone.ts
+++ b/lib/zone.ts
@@ -1145,7 +1145,14 @@ const Zone: ZoneType = (function(global: any) {
   if (NativePromise) {
     patchThen(NativePromise);
     if (typeof global['fetch'] !== 'undefined') {
-      const fetchPromise = global['fetch']('about:blank');
+      var fetchPromise: Promise<any>;
+      try {
+        // In MS Edge this throws
+        fetchPromise = global['fetch']();
+      } catch (e) {
+        // In Chrome this throws instead.
+        fetchPromise = global['fetch']('about:blank');
+      }
       // ignore output to prevent error;
       fetchPromise.then(() => null, () => null);
       if (fetchPromise.constructor != NativePromise) {