XHR multipart support is now deprecated

Published: | Categories: DOM | Creative Commons BY-SA 3.0


Support for the multipart property and multipart/x-mixed-replace responses in XMLHttpRequest has been deprecated. This was a Firefox-only feature that was never standardized, therefore it will be removed from Firefox 22. Server-Sent Events, Web Sockets or inspecting responseText from progress events can be used instead.

Update: The multipart support has been removed with Firefox 22.