index.js

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import registerServiceWorker from './registerServiceWorker';
import axios from "axios";

axios.defaults.baseURL = "https://jsonplaceholder.typicode.com";
axios.defaults.headers.common['Authorization'] = 'AUTH TOKEN';
axios.defaults.headers.post['Content-Type']='applicaion/json';

axios.interceptors.request.use(request=>{
    console.log(request);
    return request
},error=>{
    console.log(error);
    return Promise.reject(error);
})

axios.interceptors.response.use(response=>{
    console.log(response);
    return response;
},error=>{
    console.log(error);
    return Promise.reject(error);
})

ReactDOM.render( <App />, document.getElementById( 'root' ) );
registerServiceWorker();