On Fri, Feb 20, 2026 at 11:35 AM Hubert Chao <[email protected]> wrote:

>
>
> On Fri, Feb 20, 2026 at 10:23 AM Mike Taylor <[email protected]>
> wrote:
>
>> On 2/19/26 2:28 p.m., Chromestatus wrote:
>>
>> *Contact emails*
>> [email protected]
>>
>> *Explainer*
>> https://github.com/WICG/local-network-access/blob/main/explainer.md
>>
>> *Specification*
>> https://wicg.github.io/local-network-access/#integration-with-webtransport
>>
>> I'd be happier if we spent some time defining the actual integration with
>> WebTransport - this doesn't really describe how or when LNA should be
>> applied. i.e., does it happen in the constructor steps? Or when obtaining a
>> connection? Somewhere else? Does it ever throw an error? etc
>>
>
> The short answer is that this check happens in the constructor before a
> connection is attempted.  Re: more spec work, its something that is on our
> list of things to do, but we've chosen to prioritize other LNA landing work
> to ensure better user experiences (see the ongoing discussion in
> https://groups.google.com/a/chromium.org/g/blink-dev/c/8AK8V4fSZFU)
>
> Looking briefly at the specs, I'm not 100% sure if we'd patch the fetch
> spec for "obtaining a connection" (
> https://fetch.spec.whatwg.org/#concept-connection-obtain) which is
> referenced in webtransport's "obtaining a connection" section (here
> <https://www.w3.org/TR/webtransport/#webtransport-constructor:~:text=Let%20connection%20be%20the%20result%20of%20obtaining%20a%20connection%20with%20networkPartitionKey%2C%20url%2C%20false%2C%20newConnection%2C%20requireUnreliable%20and%20webTransportHashes.>).
> If its the former, than we wouldn't need to change the WebTransport spec at
> all.
>
>
>>
>> *Is this feature fully tested by web-platform-tests
>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?*
>> No
>>
>> Why not? It seems like this should be possible
>>
>
> Because we haven't prioritized WPTs for LNA up until recently; we've been
> using chromium browser tests and unit tests. This is on our priority list
> (again see the discussion ongoing in
> https://groups.google.com/a/chromium.org/g/blink-dev/c/8AK8V4fSZFU)
>

Update: we have WPT's covering WebSockets
<https://github.com/web-platform-tests/wpt/blob/master/fetch/local-network-access/websocket.tentative.https.html>
and WebTransport
<https://github.com/web-platform-tests/wpt/blob/master/fetch/local-network-access/webtransport.tentative.https.html>
.

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