Importing firebaseui

index.js

/*global firebaseui*/
/*global firebase*/

import React from 'react';
import ReactDOM from 'react-dom';
import App from './App';
import 'bootstrap/dist/css/bootstrap.css';
import 'bootstrap/dist/css/bootstrap-theme.css';

import './index.css';
// import * as firebase from 'firebase';

// Initialize Firebase
var config = {
  apiKey: "REMOVED",
  authDomain: "REMOVED",
  databaseURL: "REMOVED",
  storageBucket: "REMOVED",
  messagingSenderId: "REMOVED"
};
firebase.initializeApp(config);

const firebaseui = global.firebaseui;
const authUi = new firebaseui.auth.AuthUI(firebase.auth());

var uiConfig = {
  'signInSuccessUrl': './',
  'signInOptions': [
    // Leave the lines as is for the providers you want to offer your users.
    firebase.auth.EmailAuthProvider.PROVIDER_ID
  ],
  // Terms of service url.
  'tosUrl': './terms.html',
};

// The start method will wait until the DOM is loaded.
authUi.start('#firebaseui-auth-container', uiConfig);

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