Before I write it out it would be nice to assess whether there is
consensus on this. From the current draft, asBlob, responseBlob, and
responseArrayBuffer are removed. response and responseType are added.
responseType can be set when the state is either OPENED or
HEADERS_RECEIVED and must be set before send() is invoked for synchronous
requests. When set at an inappropriate point it throws INVALID_STATE_ERR
much like the other attributes. (This means responseType can be set during
the request, specifically after all headers are available to the author so
she/he can make an informed choice what to set responseType to.)
Depending on the type response either starts returning at LOADING or DONE.
overrideMimeType can be invoked whenever responseType can be set.
responseType has these constants:
RESPONSE_DEFAULT
RESPONSE_TEXT
RESPONSE_DOCUMENT
RESPONSE_BLOB
RESPONSE_ARRAY_BUFFER
When set to anything but RESPONSE_DEFAULT responseText and responseXML
will throw INVALID_STATE_ERR. When set to RESPONSE_DEFAULT response
returns what responseText returns. (This seems mildly better than
throwing, but I can be convinced to make it throw instead.)
--
Anne van Kesteren
http://annevankesteren.nl/
