Support for XMLHttpRequest.responseXML

[jp30566347]

I don't see any support for that attribute, however it seems that it is in the spec:
http://www.w3.org/TR/XMLHttpRequest/#the-responsexml-attribute

I think it would be really easy to integrate a DOMParser kind of object and add this extension.
What do you think?

Edit: I would contribute a pull request upon confirmation that this an issue, but I'd also require some hint as to how to integrate the xml parser.

[pwnall]

I'm wary of adding this support. It'd require xhr2 to choose a DOM parser for people, and I don't think there's a universally accepted parser. Also, doing this would require a good amount of research, because I'd want a parser that meets the WHATWG / W3C specs.

FWIW, responseXML is not supported in Web workers, so your code will be at least somewhat non-portable if you rely on this property.
https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest#Properties

If you don't need portable code, I'd suggest using whatever parser you'd like on responseText. If you do, perhaps try a DOMParser polyfill?
For example, https://github.com/jindw/xmldom looks good, but it only supports DOM2. If that's sufficient for your purposes, it might do the trick.

[jp30566347]

Why not use xmldom then? That's what I use and it's working great AFAIK and DOM2 is better than nothing. No need to make this a hard requirement, you could make it optional and ask for a DOM parser implementation and expect the W3C format?

As for web workers, I don't get why would I use this library with web workers, aren't people using web worker using the native browser XMLHttpRequest?