Add an option to delay the automatic persistence. (#986)

* add an option to deactivate the automatic start

* document the new manualPersist option in the readme

Author: leoek

README.md

@@ -74,6 +74,7 @@ const App = () => {
   - arguments
     - **store** *redux store* The store to be persisted.
     - **config** *object* (typically null)
+      - If you want to avoid that the persistence starts immediatly after calling `persistStore`, set the option manualPersist. Example: `{ manualPersist: true }` Persistence can than be started at any point with `peristor.persist()`. You usually want to do this, if your storage is not ready when the `persisStore` call is made.
     - **callback** *function* will be called after rehydration is finished.
   - returns **persistor** object
 

src/persistStore.js

@@ -65,7 +65,7 @@ export default function persistStore(
   let _pStore = createStore(
     persistorReducer,
     initialState,
-    options ? options.enhancer : undefined
+    options && options.enhancer ? options.enhancer : undefined
   )
   let register = (key: string) => {
     _pStore.dispatch({
@@ -122,7 +122,9 @@ export default function persistStore(
     },
   }
 
-  persistor.persist()
+  if (!(options && options.manualPersist)){
+    persistor.persist()
+  }
 
   return persistor
 }

src/types.js

@@ -31,6 +31,7 @@ export type PersistConfig = {
 
 export type PersistorOptions = {
   enhancer?: Function,
+  manualPersist?: boolean
 }
 
 export type Storage = {