Hi,

Please start the reviews for the 5 other areas shown below in your
chromestatus entry (once you've done show they should turn blue, not gray):

[image: Screenshot 2024-02-21 9.08.57 AM.png]


On Wed, Feb 21, 2024 at 8:03 AM Yoav Weiss (@Shopify) <
yoavwe...@chromium.org> wrote:

> LGTM1
>
> Thanks for catching us up here!!
>
> On Wed, Feb 21, 2024 at 4:57 PM Mattias Buelens <mattias.buel...@gmail.com>
> wrote:
>
>> Contact emails
>>
>> mattias.buel...@gmail.com
>>
>> Explainer
>>
>>
>> https://github.com/whatwg/streams/blob/main/readable-stream-async-iteration-explainer.md
>>
>> Specification
>>
>> https://streams.spec.whatwg.org/#rs-asynciterator
>>
>> Summary
>>
>> The streams APIs provide ubiquitous, interoperable primitives for
>> creating, composing, and consuming streams of data. This change adds
>> support for the async iterable protocol to the ReadableStream API, enabling
>> readable streams to be used as the source of for await...of loops.
>>
>>
>> Blink component
>>
>> Blink>Network>StreamsAPI
>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ENetwork%3EStreamsAPI>
>>
>> Motivation
>>
>> To consume a ReadableStream, developers currently acquire a reader and
>> repeatedly call read(). By adding support for the async iterable protocol,
>> web developers will be able to use the much simpler for await...of syntax
>> to loop over all chunks of a ReadableStream.
>>
>> Web developers are already using polyfills to async-iterate over a
>> ReadableStream. These polyfills usually work fine, but might not handle all
>> edge cases correctly (such as when the stream errors during a read, or
>> releasing the reader's lock when breaking out of a for await...of loop).
>>
>>
>> Initial public proposal
>>
>> None
>>
>> Search tags
>>
>> streams <https://chromestatus.com/features#tags:streams>
>>
>> TAG review
>>
>> None
>>
>> TAG review status
>>
>> Not applicable. (This is a small feature with a mature specification
>> that's already shipping in Firefox.)
>>
>> Risks
>>
>> Interoperability and Compatibility
>>
>> Low risk. The Streams API has already been standardised for a long time.
>> Async iteration is already supported in one other browser (Firefox) and
>> several JavaScript runtimes (Node.js, Deno, bun).
>>
>>
>> Gecko: Shipped/Shipping (
>> https://bugzilla.mozilla.org/show_bug.cgi?id=1525852) Shipped in Firefox
>> 110
>>
>> WebKit: No signal (
>> https://github.com/WebKit/standards-positions/issues/319)
>>
>> Web developers: Positive (https://github.com/whatwg/streams/issues/778)
>> Developers already expect this to work, and often use a polyfill.
>>
>> Other signals:
>>
>> Activation
>>
>> Async iteration can be feature detected by checking the existence of
>> `ReadableStream.prototype.values`. Various polyfills already exist in the
>> wild. (e.g.
>> https://jakearchibald.com/2017/async-iterators-and-generators/)
>>
>>
>> WebView application risks
>>
>> Does this intent deprecate or change behavior of existing APIs, such that
>> it has potentially high risk for Android WebView-based applications?
>>
>> None
>>
>>
>> Debuggability
>>
>> No special support needed. The JavaScript debugger is already
>> sufficiently capable of handling for await...of loops.
>>
>>
>> Is this feature fully tested by web-platform-tests
>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>> ?
>>
>> Yes
>>
>> https://wpt.fyi/results/streams/readable-streams/async-iterator.any.html
>>
>>
>> Flag name on chrome://flags
>>
>> None
>>
>> Finch feature name
>>
>> ReadableStreamAsyncIterable
>>
>> Requires code in //chrome?
>>
>> False
>>
>> Tracking bug
>>
>> https://issues.chromium.org/issues/40612900
>>
>> Estimated milestones
>>
>> No milestones specified
>>
>>
>> Link to entry on the Chrome Platform Status
>>
>> https://chromestatus.com/feature/5143121161879552
>>
>> This intent message was generated by Chrome Platform Status
>> <https://chromestatus.com/>.
>>
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>>
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