Console for Javascript
Example:
Logger.log('hello world');
Logger.error('error for some reason!');
Logger.time('A process');
// calculation ...
Logger.timeEnd('A process');
//The console will be popped up by ctrl+alt+F9 by default, you can change it:
Logger.setPopupTrigger(function(evt){
if(evt.keyCode === 121)
return true;
});