Intent to Ship: User Defined Byte Streams

[Matthew Gaudet]

The streams specification provides a number of interfaces and options for dealing with byte oriented data streams.

We have previously prototyped these, but have never shipped them to release (outside of a subset exposed via the `fetch` API). We plan to ship this feature in Nightly 101:

Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1767342

Specification: https://streams.spec.whatwg.org/#dom-underlyingsource-type

Platform Coverage: all

Preference: dom.streams.byte_streams.enabled

Other Browsers: Chrome shipped in 89, Safari still does not ship. 

Web Platform Tests: https://github.com/web-platform-tests/wpt/tree/master/streams/readable-byte-streams

[Matthew Gaudet]

Erm. That should read "Nightly 102". Not 101.