fix issue with redux HMR (reduxjs/redux#667 (comment))

Author: maullerz

src/index.js

@@ -37,3 +37,15 @@ ReactDOM.render((
     </Provider>
   ), document.getElementById('root')
 );
+
+
+if (module.hot) {
+  module.hot.accept();
+
+  // fix hot module replacement for reducers
+  module.hot.accept('./ducks/index', () => {
+    const nextRootReducer = require('./ducks/index');
+
+    store.replaceReducer(nextRootReducer);
+  });
+}

src/redux-store.js

@@ -44,14 +44,5 @@ export default function configureStore(initialState) {
     );
   }
 
-
-  if (module.hot) {
-    module.hot.accept('./ducks/index', () => {
-      const nextRootReducer = require('./ducks/index');
-
-      store.replaceReducer(nextRootReducer);
-    });
-  }
-
   return store;
 }