From 488e033e13fc809f237f236111d168780ee9a01f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Paul=20O=E2=80=99Shannessy?= <paul@oshannessy.com>
Date: Fri, 25 Sep 2015 15:13:48 -0700
Subject: [PATCH] Switch to isomorphic-fetch

---
 package.json                     |  4 ++--
 scripts/babel/default-options.js |  2 +-
 src/__forks__/fetch.js           | 10 ++++++++--
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/package.json b/package.json
index 857234e4..bc0fd606 100644
--- a/package.json
+++ b/package.json
@@ -63,9 +63,9 @@
   "dependencies": {
     "core-js": "^1.0.0",
     "loose-envify": "^1.0.0",
+    "isomorphic-fetch": "^2.1.1",
     "promise": "^7.0.3",
-    "ua-parser-js": "^0.7.9",
-    "whatwg-fetch": "^0.9.0"
+    "ua-parser-js": "^0.7.9"
   },
   "devEngines": {
     "node": ">=3",
diff --git a/scripts/babel/default-options.js b/scripts/babel/default-options.js
index 2eb3065c..9a1e70e0 100644
--- a/scripts/babel/default-options.js
+++ b/scripts/babel/default-options.js
@@ -43,8 +43,8 @@ module.exports = {
   plugins: plugins,
   _moduleMap: {
     'core-js/library/es6/map': 'core-js/library/es6/map',
+    'isomorphic-fetch': 'isomorphic-fetch',
     'promise': 'promise',
     'ua-parser-js': 'ua-parser-js',
-    'whatwg-fetch': 'whatwg-fetch',
   },
 };
diff --git a/src/__forks__/fetch.js b/src/__forks__/fetch.js
index 33f3cee4..743ce1d3 100644
--- a/src/__forks__/fetch.js
+++ b/src/__forks__/fetch.js
@@ -11,5 +11,11 @@
 
 'use strict';
 
-require('whatwg-fetch');
-module.exports = self.fetch.bind(self);
+// This hopefully supports the React Native case, which is already bringing along
+// its own fetch polyfill. That should exist on `global`. If that doesn't exist
+// then we'll try to polyfill, which might not work correctly in all environments.
+if (global.fetch) {
+  module.exports = global.fetch.bind(global);
+} else {
+  module.exports = require('isomorphic-fetch');
+}