Viewports in Phantom.js

viewport.js

// Viewport
//
// phantom.js viewport.js http://google.com 400

var args = require("system").args;

var url = args[1];
var width = args[2];
var height = args[3];

if (!url || !width) {
    console.log("Usage: [url] [width] [height]");
    phantom.exit();
}

var page = require("webpage").create();

page.viewportSize.width = width;

if (height) {
    page.viewportSize.height = height;
}

page.open(url, function() {
    var label = url.match(/http\:\/\/(.*(\?.*|))/)[1].replace(/\//g, ".");
    page.render([label, width, height || "x", "png"].join("."));
    console.log("Done");
    phantom.exit();
});