normalizeconsole.js

(function(console) {
   /*********************************************************************************************
    * Make sure console exists because IE blows up if it's not open and you attempt to access it
    * Create some dummy functions if we need to, so we don't have to if/else everything
    *********************************************************************************************/
   console||(console = window.console = {
      // all this "a, b, c, d, e" garbage is to make the IDEs happy, since they can't do variable argument lists
      /**
       * @param a
       * @param [b]
       * @param [c]
       * @param [d]
       * @param [e]
       */
      log: function(a, b, c, d, e) {},
      /**
       * @param a
       * @param [b]
       * @param [c]
       * @param [d]
       * @param [e]
       */
      info: function(a, b, c, d, e) {},
      /**
       * @param a
       * @param [b]
       * @param [c]
       * @param [d]
       * @param [e]
       */
      warn: function(a, b, c, d, e) {},
      /**
       * @param a
       * @param [b]
       * @param [c]
       * @param [d]
       * @param [e]
       */
      error: function(a, b, c, d, e) {}
   });

   // le sigh, IE, oh IE, how we fight... fix Function.prototype.bind as needed
   if (!Function.prototype.bind) {
      //credits: taken from bind_even_never in this discussion: https://prototype.lighthouseapp.com/projects/8886/tickets/215-optimize-bind-bindaseventlistener#ticket-215-9
      Function.prototype.bind = function(context) {
         var fn = this, args = Array.prototype.slice.call(arguments, 1);
         return function(){
            return fn.apply(context, Array.prototype.concat.apply(args, arguments));
         };
      };
   }

   // IE 9 won't allow us to call console.log.apply (WTF IE!) It also reports typeof(console.log) as 'object' (UNH!)
   // but together, those two errors can be useful in allowing us to fix stuff so it works right
   if( typeof(console.log) === 'object' ) {
      // Array.forEach doesn't work in IE 8 so don't try that :(
      console.log = Function.prototype.call.bind(console.log, console);
      console.info = Function.prototype.call.bind(console.info, console);
      console.warn = Function.prototype.call.bind(console.warn, console);
      console.error = Function.prototype.call.bind(console.error, console);
   }

   /**
    * Support group and groupEnd functions
    */
   ('groupCollapsed' in console) ||
   (console.groupCollapsed = function(msg) {
      console.info("\n------------\n"+msg+"\n------------");
   });
   ('group' in console) ||
   (console.group = function(msg) {
      console.info("\n------------\n"+msg+"\n------------");
   });
   ('groupEnd' in console) ||
   (console.groupEnd = function() {
      //console.log("\n\n");
   });

   /**
    * Support time and timeEnd functions
    */
   ('time' in console) ||
   (function() {
      var trackedTimes = {};
      console.time = function(msg) {
         trackedTimes[msg] = new Date().getTime();
      };
      console.timeEnd = function(msg) {
         var end = new Date().getTime(), time = (msg in trackedTimes)? end - trackedTimes[msg] : 0;
         console.info(msg+': '+time+'ms')
      }
   }());

})(window.console);