"; this.initEvents(); } DropDown.prototype = { initEvents : function() { var obj = this; obj.dd.on('click', function(event){ $(this).toggleClass('active'); event.stopPropagation(); }); } } $(function() { var dd = new DropDown( $('#dd') ); $(document).click(function() { // all dropdowns $('.wrapper-dropdown-2').removeClass('active'); }); });