diff --git a/config/polyfills.js b/config/polyfills.js
new file mode 100644
index 0000000000000000000000000000000000000000..66dff0a8b1419497fc2be6b9eb3ba88bf37f335c
--- /dev/null
+++ b/config/polyfills.js
@@ -0,0 +1,22 @@
+'use strict';
+
+if (typeof Promise === 'undefined') {
+  // Rejection tracking prevents a common issue where React gets into an
+  // inconsistent state due to an error, but it gets swallowed by a Promise,
+  // and the user has no idea what causes React's erratic future behavior.
+  require('promise/lib/rejection-tracking').enable();
+  window.Promise = require('promise/lib/es6-extensions.js');
+}
+
+// fetch() polyfill for making API calls.
+require('whatwg-fetch');
+
+// Object.assign() is commonly used with React.
+// It will use the native implementation if it's present and isn't buggy.
+Object.assign = require('object-assign');
+
+// In tests, polyfill requestAnimationFrame since jsdom doesn't provide it yet.
+// We don't polyfill it in the browser--this is user's responsibility.
+if (process.env.NODE_ENV === 'test') {
+  require('raf').polyfill(global);
+}