Unexpected token import - Electron/React

When I attempt to run my program after starting to learn React, I face this error when I ran my start script. I am importing the class 'App' from app.js to my entry point main.js.

Below is my code:

webpack.config.js

module.exports = {
  entry: './main.js',
  target: "electron",
  output: {
    path: './',
    filename: 'app.js'
  },
devServer: {
  inline: true,
  port: 3333
},
module: {
  loaders: [
    {
      test: /\.js$/,
      exclude: /node_modules/,
      loader: 'babel',
      query: {
        presets: ['es2015', 'react']
      }
    }
  ]
 }
}

app.js:

const React = require('react');

class App extends React.Component {
    mapboxgl.accessToken = 'key_here';

    render() {
      return (
        <div>
          var map = new mapboxgl.Map({
              container: 'map',
              style: 'map_style_here',
              center: [-74.50, 40],
              zoom: 9
           });
        </div>
      );
    }
}

export default App

main.js:

'use strict';

const React    = require('react');
const ReactDOM = require('react-dom');

import App from './app';

const BrowserWindow = require('browser-window')
const app           = require("app");

var mainWindow = null;     // Keep global reference to main broswer window.

app.on('window-all-closed', function() {
 if (process.platform != 'darwin') {
   app.quit();
 }
});

app.on('ready', function() {

 // Reference the main window object.
 mainWindow = new BrowserWindow({width: 1200, height: 800});

 mainWindow.loadURL('file://' + __dirname + "/app.html")

 mainWindow.on('closed', function() {

 // Dereference the main window object.
 mainWindow = null;

 ReactDOM.render(<App />, document.getElementById('map'))
 })
})

Error:

Uncaught Exception:
SyntaxError: Unexpected token import
  at exports.runInThisContext (vm.js:53:16)
  at Module._compile (module.js:404:25)
  at Object.Module._extensions..js (module.js:432:10)
  at Module.load (module.js:356:32)
  at Function.Module._load (module.js:313:12)
  at loadApplicationPackage  
(C:\Programming\RestaurantChat\node_modules\electron
prebuilt\dist\resources\default_app\main.js:257:23)
  at Object.<anonymous> 
(C:\Programming\RestaurantChat\node_modules\electron
prebuilt\dist\resources\default_app\main.js:289:5)
  at Module._compile (module.js:425:26)
  at Object.Module._extensions..js (module.js:432:10)
  at Module.load (module.js:356:32)

Is there's something not compiling? I'm really at a loss for why there's a syntax error.