// has-navigated.js
import { Route } from 'react-router-dom'

let _hasNavigated = false

class Tracker extends React.Component {
  componentWillReceiveProps(nextProps) {
    if (nextProps.location !== this.props.location) {
      _hasNavigated = true
    }
  }

  render() {
    return null
  }
}

export const HasNavigatedRoute = () => (
  <Route component={Tracker}/>
)

export const hasNavigated = () => _hasNavigated

// App.js
import { HasNavigatedRoute, hasNavigated } from './has-navigated'

export default () => (
  <div>
    <HasNavigatedRoute/>
    {hasNavigated() ? <NormalApp/> : <FirstVisitApp/>}
  </div>
)