Grab only the most recently requested ajax call to avoid the response getting overwritten by older calls

grabThatFinalXHR.js

var handleSuccess = (function () {
    var latestRequestTimestamp = 0;
    return  function handleSuccess(timestamp, data) {
        if (timestamp < latestRequestTimestamp) { return; }
        latestRequestTimestamp = timestamp;
        
        / stuff
    };
});

$.ajaxSetup({contentType: "application/json"});
$.getJSON(url, params)
  .done(function (data) {
    handleSuccess(requestTimestamp, data);
  });