From 4bcfeddfa02b83bcfb4ba76319aa9e7b05fa9cbc Mon Sep 17 00:00:00 2001
From: "C. T. Lin" <chentsulin@gmail.com>
Date: Sat, 15 Aug 2015 11:12:17 +0800
Subject: [PATCH] fix `process is not defined` in react-native

---
 src/utils/combineReducers.js | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/utils/combineReducers.js b/src/utils/combineReducers.js
index 8ba298991a..1a9fca8973 100644
--- a/src/utils/combineReducers.js
+++ b/src/utils/combineReducers.js
@@ -105,9 +105,20 @@ export default function combineReducers(reducers) {
       return newState;
     });
 
-    if (process.env.NODE_ENV !== 'production' && !stateShapeVerified) {
-      verifyStateShape(state, finalState);
-      stateShapeVerified = true;
+    if ((
+      // Node-like CommonJS environments (Browserify, Webpack)
+      typeof process !== 'undefined' &&
+      typeof process.env !== 'undefined' &&
+      process.env.NODE_ENV !== 'production'
+    ) ||
+      // React Native
+      typeof __DEV__ !== 'undefined' &&
+      __DEV__ //eslint-disable-line no-undef
+    ) {
+      if (!stateShapeVerified) {
+        verifyStateShape(state, finalState);
+        stateShapeVerified = true;
+      }
     }
 
     return finalState;