Run this project:

npm install
npm start
# in another tab
npm run webpack

After you see the webpack compilation succeed (the npm run webpack step), open up the nested html files in src/* (no server needed!). Then modify whichever file in src and refresh the page to see the changes.

For more elaborate ReasonReact examples, please see https://github.com/reasonml-community/reason-react-example