Use typeof when comparing undefined

apollographql · Jan 5, 2017 · 8996670 · 8996670
1 parent ebf9751
commit 8996670
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/ApolloClient.ts b/src/ApolloClient.ts
@@ -435,7 +435,7 @@ export default class ApolloClient {
     }
 
     // ensure existing store has apolloReducer
-    if (reduxRootSelector(store.getState()) === undefined) {
+    if (typeof reduxRootSelector(store.getState()) === 'undefined') {
       throw new Error(
           'Existing store does not use apolloReducer. Please make sure the store ' +
           'is properly configured and "reduxRootSelector" is correctly specified.',