I am having trouble setting the XHR responseType to \"json\". It works fine if I leave it an empty string xml.responseType = \"\"; but when I set it to \"json\
The JSON responseType is not implemented in the WebKit.
http://groups.google.com/a/chromium.org/group/chromium-bugs/browse_thread/thread/8107e50e4207eb5a/a5d2c31247feae56?lnk=raot
Update 2016-01-03:
As could be expected, WebKit has implemented this feature in the meantime.