naive.js

var App = require('./App')
var React = require('react')
var ReactDOM = require('react-dom')

// Render the root component normally
var rootEl = document.getElementById('root')
ReactDOM.render(<App />, rootEl)

// Are we in development mode?
if (module.hot) {
  // Whenever a new version of App.js is available
  module.hot.accept('./App', function () {
    // Require the new version and render it instead
    var NextApp = require('./App')
    ReactDOM.render(<NextApp />, rootEl)
  })
}

that was the best starting point on finding out how to implement hmr for something else then react, thank you very much!

This is the right receipt for hot reloadable pure apps, aka apps with stateless components and the app state stored elsewhere.
Super nice.

React Native version would be nice.

React Native version https://github.com/este/este/blob/0a7060827ba30fbaa8a8d19f03f82d5be0b7e689/src/native/app/Root.js#L56