Ignore polyfill in node

.babelrc

@@ -1,5 +1,5 @@
 {
   "presets": [
-    ["es2015", { "modules": false }]
+    "@babel/preset-env"
   ]
 }

.eslintrc

@@ -1,6 +1,7 @@
 {
-  "extends": "airbnb-base",
+  "extends": ["airbnb-base", "prettier"],
+  "plugins": ["prettier"],
   "env": {
     "browser": true
   }
-}
+}

dist/ff-polyfill.js

@@ -1,5 +1,9 @@
 // Copy paste from https://gist.github.com/nuxodin/9250e56a3ce6c0446efa
 export default function () {
+  // exit if this function is runnging in node
+  if (typeof window === "undefined") {
+    return;
+  }
   var w = window,
       d = w.document;