想认识each()看这里

$(‘.creded‘).each(function(n){
                $(this).mouseover(function() {
                    $(this).children(‘.crededed‘).css(‘display‘,‘block‘);
                });
                
                $(this).mouseleave(function() {
                            $(this).children(‘.crededed‘).css(‘display‘,‘none‘);
                });
            });

link: function (scope, element, attrs)
            {
                angular.element(element).find("input[theme]").each(function ()
                {
                    var datas = "";
                    if ($(this).is(‘:checked‘))
                    {
                        var className = $(this).attr("className");
                        datas = "css/skincss/" + className + ".css";
                        scope.themesheet.attr(‘href‘, datas);
                    }
                   
                    $(this).on(‘click‘, function () {
                        //var index = $(this).attr("theme");
                        var className = $(this).attr("className");
                        datas = "css/skincss/" + className + ".css";
                        scope.themesheet.attr(‘href‘, datas);
                    })
                  
                })

            }

<script type="text/javascript">
$(document).ready(function(){
  $("button").click(function(){
    $("li").each(function(){
      alert($(this).text())
    });
  });
});
</script>