fix: use simpler conditions for index.js, implements #1244

Author: theKashey

examples/parcel/package.json

@@ -3,7 +3,9 @@
   "version": "1.0.0",
   "license": "MIT",
   "scripts": {
-    "start": "parcel index.html"
+    "start": "parcel index.html",
+    "start:prod": "parcel build index.html",
+    "start:link": "cp -R ../../dist ./node_modules/react-hot-loader && cp -R ../../*.js ./node_modules/react-hot-loader"
   },
   "devDependencies": {
     "babel-core": "^6.26.3",

index.js

@@ -1,8 +1,12 @@
 'use strict';
 
-var hasWindow = typeof window !== 'undefined';
-
-if (!module.hot || process.env.NODE_ENV === 'production' || !hasWindow) {
+if (process.env.NODE_ENV === 'production') {
+  module.exports = require('./dist/react-hot-loader.production.min.js');
+} else if (!module.hot) {
+  console.error('React-Hot-Loader: Hot Module Replacement is not enabled');
+  module.exports = require('./dist/react-hot-loader.production.min.js');
+} else if (typeof window === 'undefined') {
+  // this is just server environment
   module.exports = require('./dist/react-hot-loader.production.min.js');
 } else {
   var evalAllowed = false;