console-helper.js

// Make it safe to do console.log() always.
(function (c) {
  var method,
  d = function() {},
  m = 'assert,count,debug,dir,dirxml,error,exception,group,groupCollapsed,\
groupEnd,info,log,markTimeline,profile,profileEnd,time,timeEnd,trace,warn'
.split(',');
  while (method = m.pop()) {
    c[method] || (c[method] = d);
  }
})(window.console || (window.console = {}));

// And the same in CoffeeScript: 
/*
do (cons = (window.console ||= {})) ->
  noop = ->
  methods = "assert,count,debug,dir,dirxml,error,exception,group,groupCollapsed,groupEnd,info,log,markTimeline,profile,profileEnd,time,timeEnd,trace,warn".split(",")
  cons[method] ||= noop while method = methods.pop()
  return

*/