Entry point of our Firebase react app

indexOfCRA.js

/**
* @description Entry point of our app
*/

const Component = () => (
  <Provider store={store}>
    <App />
  </Provider>
)

const render = () => {
  ReactDOM.render(<Component />, document.getElementById('root'), () => {
    window.store = store
  })
}

render()
if ('serviceWorker' in navigator) {
  navigator.serviceWorker.register('./assets/firebase-messaging-sw.js',)
    .then(function (registration) {
      firebase.messaging().useServiceWorker(registration);
      initializePush(messaging)
      console.log("This service worker is registered")
    }).catch(function (err) {
      console.log('Service worker registration failed, error:', err);
    });
}