text: let mix = require('laravel-mix');
  
  mix
      .autoload({
          jquery: ['$', 'window.jQuery', 'jQuery'],
          tether: ['window.Tether', 'Tether'],
          'popper.js/dist/umd/popper.js': ['Popper']
      })
      .extract(['axios', 'bootstrap', 'jquery', 'moment', 'tether', 'vue'])
      .js('resources/assets/js/app.js', 'public/js/')
      .version();
  
  mix
      .sass('resources/assets/sass/vendor.scss', 'public/css')
      .sass('resources/assets/sass/app.scss', 'public/css')
      .version();
  