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WHATUP meeting at TPAC 2026 #398
Description
👋🏻 I filed a request for WHATWG to have a meeting during TPAC in Dublin this year: w3c/tpac2026-meetings#31. The agenda will be maintained right here in this comment.
The WHATWG (Web Hypertext Application Technology Working Group) community will meet at the Technical Plenary (TPAC) 2026 in Dublin, Ireland the week of October 26, 2026. We call this the "Web HyperText Application Technology Unconference Plenary" or WHATUP for short. See the overall TPAC pages for conference, hotel, and travel logistics. Registration is required.
Remote participation is available via Zoom. People who can are encouraged to attend as the face to face opportunity is valuable for the work, but W3C expects many people to be unable to attend and plans to provide quality remote participation support. Note that registration is also required for remote participants.
The purpose of this meeting is to make progress on the current open tasks in a high-bandwidth medium that an in-person meeting provides. Additionally it will be an excellent opportunity to strengthen the relationships between all participants, and among participants in other related groups where there’s frequent overlap, by spending some time together. There is a draft agenda below, but it will become more concrete closer to TPAC, when it becomes clear what issues have been resolved and what new topics have come up.
Please suggest topics in the comments below, or reach out to @jstenback (jstenback@google.com) for coordination with other groups etc, and they’ll be taken into consideration for incorporation into the agenda.
Schedule (all time slots are still tentative!)
Note, all times in this schedule are local time in Dublin, Ireland. Also note, the week of these meetings Ireland is no longer in daylight savings time, thus the times are GMT+0. This is before the US has moved to standard time, which means Pacific time in the US is -7h from the times listed here, etc. IOW, this week the time difference between Ireland and US Pacific time is 7h, not the normal 8h.
Monday 10/26/2026
- 13:45–15:00: WHATWG, Accessible Platform Architectures Working Group Joint Meeting
- Agenda listed here.
Tuesday 10/27/2026
TBD
Wednesday 10/28/2026
TPAC Breakout day
Thursday 10/29/2026 (9:00-16:45)
- 09:00-10:30: WHATWG topics:
- Proposal: Expose sequential focus navigation primitives html#13051 (@vmpstr)
- JS observability of parser operations like tag-end and declarative partial updates (@noamr):
- Custom Attributes discussion (@keithamus)
- 10:30-11:00: Break
- 11:00-12:30: CSS join session:
- responsive image issues (@noamr, etc, ~60 minutes):
- Responsive images: should we define source selection normatively instead of leaving it implementation-defined html#13077
- Authors have no way to ask for a higher or lower pixel density than the browser's default when selecting from
srcsethtml#13069 - No way to read an image's true intrinsic dimensions when sizes="auto" (or any w-descriptor srcset) is used html#12565
- [Other topics?]
- responsive image issues (@noamr, etc, ~60 minutes):
- 13:45-14:15: Joint session with the ARIA group, and WHATWG topics:
- 14:15-15:00: WHATWG topics:
- Forms discussion (@keithamus)
- HTML spec Bikeshed migration (@tabatkins, ~10min)
- Meta conversation about AI reviews
- 15:30-16:30: Module Stylesheet <link> tags discussion (@KurtCattiSchmidt, attending from Seattle)
Friday 10/30/2026 (9:45-17:30)
-
09:45-11:00: WHATWG topics:
- DOM Localization proposal (@eemeli)
- Observable API (@domfarolino, @jakearchibald):
- Fullscreen API Keyboard Lock Option status on Keyboard lock fullscreen#231 (@xingri):
-
11:30-12:45: WHATWG topics:
-
14:00-15:30: WHATWG topics:
-
16:00-17:30: WHATWG topics:
- Peripherals workstream:
- Introduction to the Peripherals workstream
- Implementation status update
- Agenda bashing (any specific issues to discuss?)
- (Tentative) WebSerial issue triage
- (Tentative) WebHID issue triage
- Peripherals workstream:
Activity
annevk commentedon Jun 23, 2026
One piece of feedback I got about the Web Engines Hackfest meeting was that it was rather unclear for observers where the agenda was and what specific issue was under discussion.
keithamus commentedon Jun 23, 2026
I discussed this a little with the observers and I think a few issues became clear to me:
noamr commentedon Sep 7, 2026
I'm not sure if this is a place to propose agenda items, or should we just go with an Agenda+TPAC label?
Some items might be in external explainers.
domfarolino commentedon Sep 7, 2026
I think this is the place!
noamr commentedon Sep 7, 2026
I'd like to also talk about declarative fragments and client-side includes, as the next step for out of order streaming / declarative partial updates.
noamr commentedon Oct 6, 2026
Let's have a session about responsive image issues, perhaps together with CSS?
e.g. whatwg/html#13077, whatwg/html#13069 and whatwg/html#12565. Might need a whole hour.
keithamus commentedon Oct 8, 2026
26 October - 13:45–15:00 (GMT) our
ARIAAPA joint session has been scheduled.Separately: I'd like to schedule "Custom Attributes", and a "Forms" discussion, I'll file issues soon but I think perhaps half hour for custom attributes and an hour for forms.
vmpstr commentedon Oct 8, 2026
I'd like to discuss whatwg/html#13051
noamr commentedon Oct 8, 2026
Let's discuss whatwg/dom#662 and whatwg/html#13008 with a title like "JS observability of parser operations like tag-end and declarative partial updates". cc @keithamus
eemeli commentedon Oct 9, 2026
I'd like to discuss progress on the DOM Localization proposal.
I've also submitted a breakout session for it (w3c/tpac2026-breakouts#65), but I suspect that'll end up being more generic, and it'll also cover the underlying message resources work.
[-]TPAC 2026 meeting[/-][+]WHATUP meeting at TPAC 2026[/+]tabatkins commentedon Oct 13, 2026
I'd like a little bit of time to discuss the HTML->Bikeshed migration. Won't take long, just want to be able to give an update.
domfarolino commentedon Oct 14, 2026
I'd like to discuss the Observable API with @jakearchibald. Specifically WICG/observable#216 and WICG/observable#217.
xingri commentedon Oct 15, 2026
I would like to discuss about the Fullscreen API Keyboard Lock Option status on whatwg/fullscreen#231 (PR: whatwg/fullscreen#232).
And this is the discussion topic:
TPAC_2026_Fullscreen_API_Keyboard_Lock_Option_PR232_status.pdf
josepharhar commentedon Oct 19, 2026
This would be nice if we have time: whatwg/html#12342
nicolo-ribaudo commentedon Oct 20, 2026
If there is time, I'd like to discuss AsyncContext HTML integration (whatwg/html#10432 / whatwg/html#13063).
I don't expect people to have reviewed the PR yet, but now that we have spec text available it's a good time to go over the semantics again.
josepharhar commentedon Oct 20, 2026
This would also be nice if there is time: whatwg/html#12777
david-risney commentedon Oct 20, 2026
I'd like to discuss WebSocket custom request headers whatwg/websockets#16 if its not too late to add to the agenda. Thanks!
Update WHATWG session schedule based on whatwg/meta#398
benlesh commentedon Oct 24, 2026
@domfarolino I'll also be present to discuss observables
noamr commentedon Oct 25, 2026
Might be good to have a meta conversation about AI reviews. Perhaps right at the end if we're done with the other topics.
matatk commentedon Oct 26, 2026
Hi everyone! There's a group meeting with APA today - doesn't look like the agenda we proposed in the meeting proposal issue may not have reached you; I put APA's proposed agenda in the calendar entry for the meeting. We are of course keen to hear if you have agenda too. Thanks!
reillyeon commentedon Oct 27, 2026
@jstenback, I'd like some time on Friday afternoon to discuss the new Peripherals workstream. Tentative agenda:
jstenback commentedon Oct 27, 2026
Thank you everyone. I believe all agenda requests as of now are at this point included in the agenda in the initial comment in this issue. If you see anything missing, or if you have further requests for more content, or requests to move something around, please let me know,