text: const fs = require('fs-extra'); // copy files
  const concat = require('concat'); // concat js
  
  // Get only one js and one css to import
  (async function build() {
    const files = [
      './dist/socialButtons/runtime.js',
      './dist/socialButtons/polyfills.js',
      './dist/socialButtons/main.js',
    ];
  
    // await - es7 - works only in async func
    await fs.ensureDir('elements'); // check elements dir exists
    await concat(files, 'elements/social-buttons.js'); // concat js
    await fs.copyFile('./dist/socialButtons/styles.css', 'elements/styles.css'); // copy styles
  }) ()
  