Add Sync Your react-router State With Redux as a react til

README.md

@@ -10,7 +10,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 For a steady stream of TILs from a variety of rocketeers, checkout
 [til.hashrocket.com](https://til.hashrocket.com/).
 
-_665 TILs and counting..._
+_666 TILs and counting..._
 
 ---
 
@@ -471,6 +471,7 @@ _665 TILs and counting..._
 - [Quickly Search For A Component With React DevTools](react/quickly-search-for-a-component-with-react-devtools.md)
 - [Read Only Input Elements](react/read-only-input-elements.md)
 - [Rendering Multiple Nodes With Fragments](react/rendering-multiple-nodes-with-fragments.md)
+- [Sync Your react-router State With Redux](react/sync-your-react-router-state-with-redux.md)
 - [Test Files In create-react-app](react/test-files-in-create-react-app.md)
 - [Upgrading To The Latest React In CodeSandbox](react/upgrading-to-the-latest-react-in-codesandbox.md)
 - [Use A Ref To Autofocus An Input](react/use-a-ref-to-autofocus-an-input.md)

react/sync-your-react-router-state-with-redux.md

@@ -0,0 +1,14 @@
+# Sync Your react-router State With Redux
+
+If you are building a React app that uses both `redux` and `react-router`,
+you'll find that you are managing app state in two places. Most of your app
+state is in `redux`. The router-specific state is component-state in the
+`Router`.
+
+You can unify it all in `redux` with
+[`react-router-redux`](https://github.com/ReactTraining/react-router/tree/master/packages/react-router-redux).
+
+You'll need to apply some middleware, combine `routerReducer` with the rest
+of your reducers, and then swap out your `BrowserRouter` with a
+`ConnectedRouter`. You can read about the details
+[here](https://github.com/ReactTraining/react-router/tree/master/packages/react-router-redux).