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我昨天在这里问了一个问题,我用这行代码得到了一个很好的答案,代码var def = new jQuery.Deferred(); 在 jsfiddle.net 上运行良好,但是我的萤火虫说TypeError: jQuery.Deferred is not a constructor,并且用这段代码var def = jQuery.Deferred();说TypeError: jQuery.Deferred is not a function