From 7cd87d3b6449bb7b5c3f859315b6b8cc96be08f9 Mon Sep 17 00:00:00 2001
From: SleepWalker <mybox@udf.su>
Date: Thu, 30 Mar 2017 09:05:12 +0300
Subject: [PATCH] #316: fix fetch on Edge

---
 src/polyfills.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/polyfills.js b/src/polyfills.js
index cdadd64..a7d9aa2 100644
--- a/src/polyfills.js
+++ b/src/polyfills.js
@@ -1,7 +1,18 @@
 import 'babel-polyfill';
-import 'whatwg-fetch';
 import { shim as shimPromiseFinaly } from 'promise.prototype.finally';
 
+const isEdge = /Edge\//.test(navigator.userAgent);
+if (isEdge) {
+    // Edge has a broken fetch implementation, so forcing the polyfill
+    // https://www.reddit.com/r/webdev/comments/57ii4f/psa_edge_14_ships_a_broken_windowfetch/
+    // https://github.com/aurelia/fetch-client/issues/81
+    // https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/9370062/
+    // https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/7773267/
+    window.fetch = undefined;
+}
+
+import 'whatwg-fetch';
+
 shimPromiseFinaly();
 
 // allow :active styles in mobile Safary