How to export from the App.js file not only the App component but also an array that is outside the App component?

Question

JavaScript

I passed the App component to the index.js file:

import React from "react";
import ReactDOM from 'react-dom';
import App from "./App";

ReactDOM.render(<App attributeApp={carsArray} />, document.getElementById('root'));

But in addition to the App component, I also have the carsArray array in the App.js file :

import React from "react";
import ReactDOM from 'react-dom';
import {BrowserRouter, Route, Link, Switch} from "react-router-dom";
import createBrowserHistory from "history/createBrowserHistory";
import './App.css';
import Header from "./smallComponents/Header.js";
import Footer from "./smallComponents/Footer.js";
import Home from "./pageComponents/Home.js";
import About from "./pageComponents/About.js";
import Contacts from "./pageComponents/Contacts.js";
import CarsList from "./pageComponents/CarsList.js";

let carsArray = [
{
    id:1,
    name: 'BMW',
    phone: '555 555 5555'
}, 
{
    id:2,
    name: 'Mercedes',
    phone: '555 111 5555'
},
{
    id:3,
    name: 'Audi',
    phone: '555 777 5555'
},
{
    id:4,
    name: 'Ford',
    phone: '555 888 5555'
}
]

const history = createBrowserHistory();

class App extends React.Component {
  render(){ 
    return (
      <BrowserRouter history={history}> 
         <div className="wrapper">
        
        <Header/>
        
       <CarsList attributeCarsList={this.props.attributeApp}/>
        
            <Switch>
              <Route exact path="/" component={Home} /> 
              <Route path="/about" component={About} />
              <Route path="/contacts" component={Contacts} />
            </Switch>
    
        <Footer/>          
        
       </div>
    </BrowserRouter>
   )
  }
}

export default App;

If the array is not passed to index.js, then there will be an error.
what to write after:
export default.....
to pass both the component and the array to index.js?
and how to write array import in index.js?

Answer 1

export let carsArray ...
import App, { carsArray } from "./App";