Is it possible to modify XMLHttpRequest data from beforeSend callback?

Question

Is it possible to modify the data sent in an Ajax request by modifying the XMLHttpRequest object in the beforeSend callback? and if so how might I do that?

Answer 1

I was looking for this solution and wonder why I am not finding the s.data so I changed the request type to post and it was there, Looks like if you are using GET request the data property is not there, I guess you have to change the s.url

for get method:

$.ajax({
  type:'GET',
  beforeSend: function(xhr, s) {
    s.url += "&newProp=newValue";
  }
});

for post method:

$.ajax({
  type:'POST',
  beforeSend: function(xhr, s) {
    s.data += "&newProp=newValue";
  }
});