Home/ Questions/Q 8504103
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-11T01:56:03+00:00

I have a question about how the XMLHttpRequest object works. In https://developer.mozilla.org/en-US/docs/DOM/XMLHttpRequest , under

  • 0

I have a question about how the XMLHttpRequest object works. In https://developer.mozilla.org/en-US/docs/DOM/XMLHttpRequest, under properties I am looking at the “response” property. The description says I should get a JavaScript object back if my content type is json. However, in my code the xhr.response property is undefined.

Specifically, I have a .ajaxSuccess() callback that is setup on a DOM element, it receives the parameters (event, xhr, settings). xhr.responseText is the plaintext version of my json, but xhr.response is undefined. Is there any way I can get the object from xhr without calling $.parseJson(xhr.responseText)?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    I think you are confusing the XMLHttpRequest object with jQuery’s jqXHR object used by $.ajaxSuccess(), which is supposed to be a superset of the former.

    Instead, you could use $.ajax()‘s done handler, which will parse the JSON for you if the data type is json. For example:

    $.ajax({
  url: url,
  dataType: 'json',
}).done(function (response) {
  // response is a JSON object, previously parsed by jQuery using $.parseJSON
});

    Also note that even though the documentation of $.ajaxSuccess() says that you get a vanilla XMLHttpRequest object, that is no longer true as of jQuery 1.4.1. Instead, you get a jqXHR object.

    • 0