XMLHttpRequest Level 2

XMLHttpRequestEventTarget

Was reserved for future use. Now has:

• attribute Function onloadstart
• attribute Function onprogress
• attribute Function onabort
• attribute Function onerror
• attribute Function onload
• attribute Function ontimeout
• attribute Function onloadend

XMLHttpRequestUpload

Inherits from XMLHttpRequestEventTarget.

XMLHttpRequest

(We don't talk here about the update to Web IDL. Ahem.)

• attribute unsigned long timeout
• attribute boolean withCredentials
• readonly attribute XMLHttpRequestUpload upload
• void send(ArrayBuffer data)
• void send(Blob data)
• void send(FormData data)
• void overrideMimeType(DOMString mime)
• attribute DOMString responseType
• readonly attribute any response

The response attribute is mostly the same as responseText, when the responseType is the empty string or "text". But it can also be an "arraybuffer", a "blob", or a "document".

As you can tell, this update mostly adds Typed Arrays.

FormData

• void append(DOMString name, Blob value, optional DOMString filename)
• void append(DOMString name, DOMString value)

Specification: http://dev.w3.org/2006/webapi/XMLHttpRequest-2/

Thanks Anne Van Kesteren.