pokemon.trade/app/javascript/packs/react-bundle.js

import ReactOnRails from 'react-on-rails';
import TestComponent from './react-app/components/test_component';
import FlashAlerts from './react-app/components/misc/flash_alerts';
import NavBar from './react-app/components/misc/nav_bar';

ReactOnRails.register({
  TestComponent,
  FlashAlerts,
  NavBar,
});