monitors keypress events and fires different event depending on whether or not the keypress actually produces a character with a value

keylogger.js

;(function($){
  //monitors keypress events and fires different event depending on whether or not the keypress actually produces a character with a value
  $.fn.keylogger = function() {
    return this.each(function() {
      $(this).keypress(function(e) {
        if ( hasValue(e) ) $(this).trigger( 'keylogger:withvalue', [String.fromCharCode(e.charCode), e] );
        else $(this).trigger( 'keylogger:novalue', e );
      });
    });

    function hasValue(e){
      var code = (e.keyCode) ? e.keyCode : e.which;
      return (e.charCode && code !== 32 && code !== 13 && !e.altKey && !e.ctrlKey && !e.metaKey);
    }
  };
})(jQuery);