screenshot.js

var casper = require('casper').create({
viewportSize: {
    width: 1920,
    height: 1080
},
verbose: true,
logLevel: 'debug'
});

var utils = require('utils');
casper.options.onResourceRequested = function(C, requestData, request) {
    utils.dump(requestData.headers);
};
var url = casper.cli.get('url');
var filename = casper.cli.get('filename');
var headers = casper.cli.get('storefront');

if (headers != null) {
    casper.userAgent('iTunes/12.4.3 (Windows; Microsoft Windows 10.0 x64 Business Edition (Build 9200); x64) AppleWebKit/7601.6016.1000.7');
}

casper.start().then(function() {
  casper.page.customHeaders = {
    'X-Apple-Store-Front': headers,
    'X-Apple-Tz': '3600'
  };
  casper.thenOpen(url, function() {
    this.wait(2000, function() {

      casper.evaluate(function () {
        ;['swoosh', 'bricks'].forEach(function (clsname) {
          var els = document.getElementsByClassName(clsname)
          for (var i=0; i<els.length; i++) {
            els[i].style.opacity = '1'
          }
        })
      })

      var fs = require('fs');
      fs.write('asd.html', this.getHTML(), 'wb');
      this.capture(filename);
    });
  });
});
casper.run();