WebPack - Building for Performance with Webpack

# vi src/index.js

const button = document.createElement('button');
button.innerText = 'Click me';
button.onclick = () => {
    System.import('./image_viewer').then(module => {
        // console.log(module);
        module.default();
    });
};

document.body.appendChild(button);

# vi src/image_viewer.js

import small from '../assets/small.jpg';
import '../styles/image_viewer.css';

export default () => {
    const image = document.createElement('img');
    image.src = small;

    document.body.appendChild(image);
};

# npm run build