Add logging using Closure. Logged messages will be printed to the DOM.

gistfile1.js

goog.require('goog.debug.DivConsole');
goog.require('goog.debug.LogManager');
goog.require('goog.log');

var div = document.createElement('div');
document.body.appendChild(div);

var divConsole = new goog.debug.DivConsole(div);
divConsole.setCapturing(true);

var log = goog.log.getLogger('my.logger');

goog.log.info(log, 'Hello, world!');