Don't call the listener with history 3

Author: timdorr

src/sync.js

@@ -97,8 +97,8 @@ export default function syncHistoryWithStore(history, store, {
   }
   unsubscribeFromHistory = history.listen(handleLocationChange)
 
-  // support history 3.x
-  if(history.getCurrentLocation) {
+  // History 3.x doesn't call listen synchronously, so fire the initial location change ourselves
+  if (history.getCurrentLocation) {
     handleLocationChange(history.getCurrentLocation())
   }
 
@@ -124,10 +124,12 @@ export default function syncHistoryWithStore(history, store, {
         }
       })
 
-      // History listeners expect a synchronous call. Make the first call to the
+      // History 2.x listeners expect a synchronous call. Make the first call to the
       // listener after subscribing to the store, in case the listener causes a
       // location change (e.g. when it redirects)
-      listener(lastPublishedLocation)
+      if (!history.getCurrentLocation) {
+        listener(lastPublishedLocation)
+      }
 
       // Let user unsubscribe later
       return () => {