Take responsive screenshots with phantomjs

Requires async; npm install async or include in your package.json file.

var async = require('async'),
 sizes = [
 [320, 480],
 [320, 568],
 [800, 600],
 [600, 1024],
 [1024, 768],
 [1136, 640],
 [640, 1136],
 [720, 1280],
 [1280, 720],
 [1280, 800],
 [1440, 900],
 [1920, 1080],
 [1080, 1920]
 ],
 args = require('system').args,
 address = '',
 dirdump = './screenshots/',
 UAgent = 'Googlebot/2.1 (+http://www.googlebot.com/bot.html)';

 args.forEach(function(arg, i) {
 if(i == 1) {
 address = arg;
 }
 });

function capture(sizes, callback) {
 var page = require('webpage').create();
 page.settings.userAgent = UAgent';

 // Run The Array
 page.viewportSize = {
 width: sizes[0],
 height: sizes[1]
 };

 page.zoomFactor = 1;
 page.open(address, function (status) {
 var filename = sizes[0] + 'x' + sizes[1] + '.png';
 page.render(dirdump + filename);
 page.close();
 callback.apply();
 });
}

async.eachSeries(sizes, capture, function (e) {
 if (e) console.log(e);
 console.log('done!');
 phantom.exit();
});