Merge pull request #351 from billfienberg/patch-1

Add import for React and ReactDOM

docs/source/tutorial/client.md

@@ -131,6 +131,8 @@ Open `src/index.js` and add the following lines of code:
 _src/index.js_
 
 ```js lines=1,4,6
+import React from 'react';
+import ReactDOM from 'react-dom';
 import { ApolloProvider } from 'react-apollo';
 
 ReactDOM.render(