Shortcut for adding animation class name to dom element

gistfile1.js

/**
 * Shortcut for adding animation class name to dom element
 * @param  {string}   cls        class name
 * @param  {Function} cb         callback
 * @param  {Function}   lastItemCb  callback execute at last elment animated 
 * @return {object}              this
 */
$.fn.classAnimoEnd = function(cls, cb, lastItemCb) {
  var el = this;

  cb && (cb = $.proxy(cb, el));

  var count = $(el).length;

  $(el)
    .removeClass('animated ' + cls)
    .one($.support.animate.end, function () {
        cb && cb();
        $(el).removeClass('animated');

        if(count > 1) {
          count --;

          if(count === 0)
            lastItemCb && lastItemCb();
        }
      })
    .addClass('animated ' + cls);

  if(!$(el).css('display') !== 'none' )
    $(el).show();

  return this;
}