https://teratail.com/questions/45846

dfd.js

function () {
  var dfd1 = $.Deferred();
  var dfd2 = $.Deferred();
  var dfd3 = $.Deferred();
  
  setTimeout(function(){
    console.log("d1-1");
    dfd1.resolve();
  },2000);

  setTimeout(function(){
    console.log("d1-2");
    dfd2.resolve();
  },10000);

  setTimeout(function(){
    console.log("d1-3");
    dfd3.resolve();
  },4000);
  
  return $.when(dfd1, dfd2, dfd3);
}