jqeury ajax 수행 완료 기다리기

포인트(?)는 ajax에서 return $.ajax()를 해주어야 한다는 것

$.when(ajax1(), ajax2(), ajax3(), ajax4()).done(function(a1, a2, a3, a4){     // the code here will be executed when all four ajax requests resolve.     // a1, a2, a3 and a4 are lists of length 3 containing the response text,     // status, and jqXHR object for each of the four ajax calls respectively. }); function ajax1() {     // NOTE:  This function must return the value      //        from calling the $.ajax() method.     return $.ajax({         url: "someUrl",         dataType: "json",         data:  yourJsonData,                     ...     }); }

[링크 : https://stackoverflow.com/questions/3709597/wait-until-all-jquery-ajax-requests-are-done]