Agenda for W3C TPAC 2017 (Web Components)

[hayatoito]

Let me use this issue to collect any agenda candidates for W3C TPAC 2017 about Web Components.

[hayatoito]

Please allow me to note the following items, (by @rniwa), here:

We would be interested in discussing the following items (not in any particular order) but we can do so over emails / Github issues as well:

• Declarative syntax
• Template instantiation & instance manipulation from JS
• HTML import replacement
• Isolated components

[hayatoito]

I can say Google would be interested in HTML import replacement, as HTML Modules.
ping @TakayoshiKochi, who might be the best person for HTML Modules.

Other than that, the following items might interest us:

• Constructable Styleheet Objects: http://tabatkins.github.io/specs/construct-stylesheets/
• CSS Shadow Parts: https://tabatkins.github.io/specs/css-shadow-parts/

[treshugart]

Declarative syntax

If this in reference to "declarative shadow roots", it's something that the community has been screaming for, especially lately, and is the root of many criticisms from other communities.

As a community member, I'm interested in hearing more about the other points. Most notably "isolated components". If I may ask, what are these?

It's really nice to see some action started on these :)

[rniwa]

Apple would be interested in the topic of shadow parts as well.

[JanMiksovsky]

Three perennial issues that were deferred from v1:

• Extending input elements. This was originally couched in terms of extending arbitrary built-in elements, but all of the cases I've personally run up against have been the desire to extend a, button, and input. Perhaps focusing on a small set of extensible elements would lead to a better outcome?
• Submitting custom elements with a form.
• Some form of namespacing or scoping for custom elements to avoid markup collisions between hard-coded element names.

[rniwa]

Apple would be interested in discussing the form submission participation as well.

[domenic]

We already have a plan for form submission, but someone has to actually do the work... I took an action item, but never got around to it, unfortunately :(.

[rniwa]

Where was this proposed and what's the proposed solution?

[domenic]

#187 and #187 (comment)

[hayatoito]

Regarding declarative shadow roots, here is the issue #71, which was closed due to a lack of a concrete proposal.

[rniwa]

#187 and #187 (comment)

Oh, you're talking about our proposal.

Regarding declarative shadow roots, here is the issue #71, which was closed due to the lack of a concrete proposal.

Right. For each one of these, it would be ideal if people can come up with proposals beforehand instead of brainstorming at TPAC.

[justinfagnani]

@rniwa I'm very interested in working out a proposal for template parts, if you are too maybe we can make some time in the next few months.

[travisleithead]

Definitely would love to progress the discussion about isolated components, and a declarative shadow-dom.

[LJWatson]

Do you have any sense how much meeting time you'd like? Based on a day being divided into four blocks - could you give me an estimate? Thanks.

[rniwa]

Here's my estimate:

• Template & declarative syntax: ~2 hours
• Isolated components: ~1 hour
• HTML import replacement: 30min
• Form submission and other topics: 30min

[justinfagnani]

I suspect that HTML imports/modules will take more than 30 min, and is as important as templates, since they are where templates would live. Maybe we can take the combined 2.5 hours between them and divide it more evenly?

[LJWatson]

We have some flexibility in the WebPlat schedule at the moment, so increasing time on HTML imports/modules shouldn't be a problem.

Are there any other groups (or groups within WebPlat) you'd like to meet with, to discuss anything on your agenda?

[annevk]

I won't be there, but I recommend going through #661 at least. There's quite a few outstanding issues with "v1" and we don't have clear answers for each of them.

Someone should probably create a similar issue for custom elements. There's a couple issues there as well.

[snuggs]

Salutations @annevk. Be careful what you ask for. Just may get it (especially when my career as an evangelist is starting to depend on the status of this) #664. Just dotting all the "I"s and crossing all the "T"(PAC)s 😎

If accepted as a good curation may want to add #664 along with #661 to the topics of discourse. Otherwise, kill it with fire. I'm a New Yorker. tough skin, won't be upset. 💪 🍎

I'm not sure of discussion regarding future features however since the last TPAC meeting there seems to be valuable interest in the following. These feel more v2 ish and prefer leaving them here for fear of the bikeshed. Added my own personal experience and thoughts as well based on the past couple years dealing with custom elements deliberation that is beginning to produce casualties that are rolling downhill. Please take as an ephemeral grain of salt (unless interested):

• Namespacing (elements and attributes)
• Self closing / void tags. (e.g. <x-foo> <!-- </x-foo> -->) (discussion & Custom 'void' or self-closing elements (HTML parser changes) #624 (comment))

Seems to be much related to namespacing in the platform spec unless i'm misinterpreting the moniker. (See #634,
Section 4.3 and Section 4.4) <acme-plastic-button> vs. <acme:plastic-button>

It was actually "fun" perusing the specs. Bug trackers & mailing list threads not so much.

[rniwa]

Apple's proposal for template instantiation has been posted to https://github.com/w3c/webcomponents/blob/gh-pages/proposals/Template-Instantiation.md

We're working on a separate proposal on the declarative syntax for custom elements.

[smaug----]

FWIW, I can attend TPAC only remotely this time (wrong country for me).

Surprising to see proposals linked here, but not in the mailing list. I wouldn't have known about it if bkelly hadn't mentioned it to me.
(Initially that proposal looks like something which should be left to script libraries, but I could be totally wrong.)

[smaug----]

There are still some major spec issues, like #184
That was discussed last year. Did webkit try out the proposed fix for that? I think I haven't heard of that issue since then.

[yoichio]

I want to talk about Selection API for Shadow DOM(#79).

[yoichio]

Posted my proposal.
https://github.com/yoichio/public-documents/blob/master/selectionapiforshadow.md

[rniwa]

2017 TPAC is done.

[TakayoshiKochi]

Minutes: https://www.w3.org/2017/11/10-webplat-minutes.html

[annevk]

No discussion of existing issues if I'm reading those minutes correctly?

[TakayoshiKochi]

No, we went out of time after the big topics on agenda on that day.