progressSubscriber not work when downloading!

[windreamlion]

Dear all:

when i create ajax to get a image, i can't get onProgress when downloading,
i need some help,Thx!!

Observable.ajax({url, crossDomain: true, ...options})

RxJS version: 5.3.0

Code to reproduce:

let ps = new Subscriber((e)=>console.log(e));

Observable.ajax({'imgUrl', crossDomain: true, progressSubscriber:ps,timeout:5000,}).subscribe()

Expected behavior:

i hope get onProgress eventData on downloading;

Actual behavior:

progressSubscriber not work;

Additional information:

i saw the code ,maybe root.XDomainRequest interrupt the xhr.onprogress ;

if (root.XDomainRequest) {
xhr.onprogress = xhrProgress;
}

[Brooooooklyn]

see #2428

[benlesh]

Seems to be a duplicate of #2448

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.