Re: [whatwg/streams] Use `async_sequence` in `ReadableStream.from` (PR #1372) from Mattias Buelens on 2026-07-04 (public-webapps-github@w3.org from July 2026)

From: Mattias Buelens <notifications@github.com>
Date: Sat, 04 Jul 2026 06:37:31 -0700
To: whatwg/streams <streams@noreply.github.com>
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MattiasBuelens left a comment (whatwg/streams#1372)

Thanks for the responses. I'll start opening implementation bugs.

> I haven't had time to check in detail whether this has any unexpected semantic side effects, but the approach looks fine.

The `async_sequence<T>` machinery in Web IDL was largely based on the original semantics for `ReadableStream.from()`, so the behavior *should* be unchanged. Well, except for strings, but that's explained above and tested in https://github.com/web-platform-tests/wpt/pull/59594. (By the way, reviews welcome! 😉)

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