Webpack's HMR (hot reloading) of JS does work with create-react-app, but only if you use an external state store (like Redux), see [1].

The 'React Hot Loader' [2] module, which maintains local React component state is not included yet.

[1] https://github.com/facebookincubator/create-react-app/issues...

[2] https://github.com/gaearon/react-hot-loader