摘要：
mac不知道为何，文章字数一多，浏览器就重启。只好分开写了。 In the event a Deferred was resolved with no value, the corresponding doneCallback argument will be undefined. If a Def 阅读全文
摘要：
地址：http://api.jquery.com/jQuery.when/ jQuery.when( deferreds )，returns Promise 正文 Description: Provides a way to execute callback functions based on z 阅读全文