I create a ReactJS project with the create-react-app package and that worked well, but I cannot find webpack files and configurations.
create-react-app
How does react-cr
Assuming you don't want to eject and you just want to look at the config you will find them in /node_modules/react-scripts/config
/node_modules/react-scripts/config
webpack.config.dev.js. //used by `npm start` webpack.config.prod.js //used by `npm run build`