Accueil.js

import React from 'react';
//import { Link } from 'react-router-dom';
import axios from 'axios';

function callServer() {
  axios.get('http://localhost:8000/test').then((response) => {
    console.log(response.data);
  });
}

export default () => (
  <div>
  Accueil
  {callServer()}
  </div>
);