Spec PR: https://github.com/whatwg/streams/pull/1083 WPT PR: https://github.com/web-platform-tests/wpt/pull/27009 `ReadableStream.from` is a new static method that allows creating a `ReadableStream` from a JS iterable or async iterable.
Pull request: https://github.com/WebKit/WebKit/pull/12454
<rdar://problem/107989076>