Add Passing Props Down To React-Router Route 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/).
 
-_573 TILs and counting..._
+_574 TILs and counting..._
 
 ---
 
@@ -407,6 +407,7 @@ _573 TILs and counting..._
 ### React
 
 - [Force A Component To Only Have One Child](react/force-a-component-to-only-have-one-child.md)
+- [Passing Props Down To React-Router Route](react/passing-props-down-to-react-router-route.md)
 
 ### Ruby
 

react/passing-props-down-to-react-router-route.md

@@ -0,0 +1,29 @@
+# Passing Props Down To React-Router Route
+
+When using [react-router](https://github.com/ReactTraining/react-router),
+you'll often use the `component` prop to have a certain component rendered.
+
+```javascript
+<Route
+  path="/my/path"
+  component={MyComponent}
+/>
+```
+
+If, however, you need to pass props down into `MyComponent`, then you'll
+want to use the `render` prop with an inline function.
+
+```javascript
+<Route
+  path="/my/path"
+  render={(routeProps) => (
+    <MyComponent {...routeProps} {...props} />
+  )}
+/>
+```
+
+The two spread operator statements are essential. They will pass down the
+[route
+props](https://reacttraining.com/react-router/web/api/Route/Route-props)
+that `Route` would have passed down plus the additional set of props that
+you want to pass down.