This will insert HTML into a DOM using jsdom

jsdom.insert.jquery.js

var jsdom = require('jsdom');
var request = require('request');

request.get({url: 'http://google.com/', followRedirect: true}, function(err, res, body) {
  if (!err) {
    if (res.statusCode == 200) {
      jsdom.env(body, ['http://code.jquery.com/jquery-1.5.min.js'], function(errors, window) {
        $ = window.jQuery;
        
        $('#lga').append('<div>WHAT</div>');
        
        console.log(window.document.outerHTML);
                        
        window.close();
      });
    }
  }
});