An example of how to take a screenshot using phantom js.

phantom_shooter.js

#!/usr/bin/env node
'use strict';

var when = require('when');
var phantom = require('phantom');

exports.takeShot = function takeShot(url, outputFilePath) {

  return when.promise(function(resolve, reject) {

    console.log('Spawning browser for', url);

    phantom.create(
      '--debug=true',
      '--ssl-protocol=any',
      '--ignore-ssl-errors=true',
      function(browser) {

        console.log('Creating page for for', url);

        browser.createPage(function(page) {

          console.log('Opening', url);

          page.open(url, function(status) {
            console.log('Status: ' + status);
            if (status !== 'success') {
              browser.exit(1);
              reject(new Error('Could not open page: ' + url));
            } else {
              setTimeout(function () {
                console.log('Rendering', outputFilePath);
                page.render(outputFilePath);
                browser.exit(0);
                resolve(true);
              }, 2000);
            }
          });

        }); // createPage
      }
    ); // create

  });
};