You will need
git clone https://github.com/FrontendMasters/2015-02-13-React.git
cd 2015-02-13-React
npm install
npm start
Then visit http://localhost:8080.
This runs the webpack dev server, any changes you make to javascript
files in excercises
will cause the browser to reload live.
https://github.com/ryanflorence/react-training/blob/gh-pages/lessons/05-wrapping-dom-libs.md