wd async error handling

gistfile1.txt

require('colors');

var wd;
try {
  wd = require('wd');
} catch( err ) {
  wd = require('../../lib/main');
}

var browser = wd.remote();

// optional extra logging
browser.on('status', function(info) {
  console.log(info.cyan);
});
browser.on('command', function(meth, path, data) {
  console.log(' > ' + meth.yellow, path.grey, data || '');
});

browser.init({browserName:'chrome'}, function() {
  browser.get("http://admc.io/wd/test-pages/guinea-pig.html", function() {
    browser.waitForElementById('i don\'t exist', function(err, el) {
      console.log('got error -->', err);
    });
  });
});

// CONSOLE OUTPUT 
//
// node examples/async/async-error-handling.js
// Driving the web on session: 897bd93f-891d-4f72-ad11-bb4b69ea6b38
//  > POST /session/:sessionID/url { url: 'http://admc.io/wd/test-pages/guinea-pig.html' }
//  > POST /session/:sessionID/elements { using: 'id', value: 'i don\'t exist' }
//  > POST /session/:sessionID/elements { using: 'id', value: 'i don\'t exist' }
//  > POST /session/:sessionID/elements { using: 'id', value: 'i don\'t exist' }
//  > POST /session/:sessionID/elements { using: 'id', value: 'i don\'t exist' }
//  > POST /session/:sessionID/elements { using: 'id', value: 'i don\'t exist' }
//  > POST /session/:sessionID/elements { using: 'id', value: 'i don\'t exist' }
//  > POST /session/:sessionID/elements { using: 'id', value: 'i don\'t exist' }
// got error --> [Error: Element condition wasn't satisfied!]