Tangent Chang says to Happy Web Developer1. jquery源碼success的判斷是 isSuccess = status >= 200 && status < 300 || status === 304;,如果要抓到201可能要另外判斷 (來源: https://github.com/jquery/jquery/blob/d7237896c79a5a10d85fcdec199c5657a469a92b/src/ajax.js#L737 ) 2. .then後面可以接兩個callback function,分別就是done與fail的callback,參考 https://api.jquery.com/deferred.then/at Thu, Feb 1, 2018 4:48 PM