"upload" property of the XMLHttpRequest

[superbulldeng@…]

There is a "upload" property in the xhr object returned by new XMLHttpRequest() in supported browser. But the object returned by $.ajax() seems didn't contain this property. This property is important to get the state of file upload progress.

[timmywil]

Marking as valid for 1.next

[malsup]

This is really a fairly significant omission. As stated above, it's impossible to track FormData file upload progress without this property exposed. The jqXHR object is documented as a "superset of the browser's native XMLHttpRequest object". The upload property is but one example where this is simply not true, with respect to XMLHttpRequest Level 2. Either all properties should be exposed or there must be a way to access to the native XHR.

[jaubourg]

-1, There are ways to access the native xhr (by overriding options.xhr in a prefilter). If we want upload in jQuery, then we'd better implement an upload method rather than try and have ajax be even more bloated.

[jzaefferer]

+1, "overriding options.xhr in a prefilter" is not good enough - at least document how to access non-exposed properties in a sane way as part of the existing docs (see also Mike's comment)

[dmethvin]

+1, I'd like a better/simpler way to do this as well

[mikesherov]

+1

[timmywil]

+1

[Rick Waldron]

-1, Ajax is extendable.

[dmethvin]

Bulk change from enhancement to feature.

[mikesherov]

F you, Timmy

[meleyal]

It seems you can access the xhr object in $.ajaxSettings.xhr();

[dmethvin]

I'm switching to -1 on this as far as $.ajax is concerned, since any addition we make here would not be cross-browser in either branch. I'd prefer to deal with this in $.xhr.

[m_gol]

Migrated to ​https://github.com/jquery/jquery/issues/1730