...

• app/
  • index.js
• public/
  • bundle.js
  • index.html
• package.json
• webpack.config.js

Make sure you have webpack installed globably:

$ npm i -g webpack

Install npm dependencies:

$ npm i

Build your bundle:

$ webpack

You are now ready to go! Serve your index.html app via a server and you will see your Hello World react component rendered!

The webpack-dev-server is a little node.js Express server, which uses the webpack-dev-middleware to serve a webpack bundle. It also has a little runtime which is connected to the server via Socket.IO

Just run the server from the project root

$ webpack-dev-server