Zero configuration 🔥Hot Module Replacement🔥 using Babel macro and react-hot-loader, mostly for Create React App (v2+) users

yarn add react-hot-reload.macro

or

npm install --save react-hot-reload.macro

Modify your App.js component

import React from 'react'
+import hot from 'react-hot-reload.macro'

...

-export default App
+export default hot(module)(App)

That's it. Happy Hacking!