App.js

import React, { Component } from 'react';
import './App.css';
import Start from "../src/components/Start.js"
import Cookies from 'universal-cookie';
import MainPage from "../src/components/MainPage.js"

class App extends Component {

  render() {
    const cookies = new Cookies();
    //const c = cookies.get('firstPage')
    //console.log("main "+ c)

    //if cookie exists, load main view
    if(cookies.get('firstPage') === "true"){
      return (
        <div className="App">
          <MainPage />
        </div>
      );
    }
    else{
      //If cookie not found: show start view
      return (
        <div className="App">
          <Start />
        </div>
      );
    }
  }
}

export default App;