We should probably use react-hot-loader

[EECOLOR]

http://gaearon.github.io/react-hot-loader/

[peeke]

This should probably become react-fast-refresh. From React hot loader's docs:

React-Hot-Loader has been your friendly neighbour, living outside of React. But it has been limiting its powers and causing not the greatest experience. It's time to make a next step.

React-Hot-Loader is expected to be replaced by React Fast Refresh. Please remove React-Hot-Loader if Fast Refresh is currently supported on your environment.

React Native - supports Fast Refresh since 0.61.
parcel 2 - supports Fast Refresh since alpha 3.
webpack - supports Fast Refresh using a plugin.
other bundler - no support yet, use React-Hot-Loader