Weekly github digest (HTML specs) from W3C Webmaster via GitHub API on 2026-04-27 (public-html@w3.org from April 2026)

From: W3C Webmaster via GitHub API <noreply@w3.org>
Date: Mon, 27 Apr 2026 17:00:32 +0000
To: public-html@w3.org
Message-ID: <177730923275.4147666.15562985327112572270@ip-10-0-1-136.ec2.internal>
Issues
------
* whatwg/html (+6/-6/💬36)
  6 issues created:
  - Navigation API: Set ongoing navigation to null aborts history traversal navigate event (by theIDinside)
    https://github.com/whatwg/html/issues/12407 
  - Does the "shadow root" concept include UA shadow roots? (by mfreed7)
    https://github.com/whatwg/html/issues/12404 [topic: shadow] 
  - <link> quirks should probably match stylesheet origin-clean flag (by emilio)
    https://github.com/whatwg/html/issues/12403 [topic: fetch] [topic: link] [topic: style] 
  - Upcoming WHATNOT meeting on 2026-04-30 (by jstenback)
    https://github.com/whatwg/html/issues/12401 [agenda+] 
  - <meta name="ai:context"> A Standard Convention for Serving Machine-Readable Page Context to AI Agents (by dgautsch)
    https://github.com/whatwg/html/issues/12399 [addition/proposal] [needs implementer interest] 
  - Should IME composition be treated more explicitly as a distinct input context, rather than ordinary application shortcut input? (by kyouhei-horizumi)
    https://github.com/whatwg/html/issues/12398 

  20 issues received 36 new comments:
  - #12404 Does the "shadow root" concept include UA shadow roots? (3 by annevk, mfreed7)
    https://github.com/whatwg/html/issues/12404 [topic: shadow] 
  - #12403 <link> quirks should probably match stylesheet origin-clean flag (6 by annevk, emilio)
    https://github.com/whatwg/html/issues/12403 [topic: fetch] [topic: link] [topic: style] 
  - #12399 <meta name="ai:context"> A Standard Convention for Serving Machine-Readable Page Context to AI Agents (4 by BANOnotIT, dgautsch, keithamus, myakura)
    https://github.com/whatwg/html/issues/12399 [addition/proposal] [needs implementer interest] 
  - #12396 importNode should allow null customElementRegistry (2 by sorvell)
    https://github.com/whatwg/html/issues/12396 [topic: custom elements] 
  - #12392 Close or disable pickers of disabled controls (1 by sb3nder)
    https://github.com/whatwg/html/issues/12392 [addition/proposal] [needs implementer interest] 
  - #12383 Upcoming WHATNOT meeting on 2026-04-23 (3 by cwilso, jstenback, scottjehl)
    https://github.com/whatwg/html/issues/12383 [agenda+] 
  - #12380 Meeting 41 for joint OpenUI-WHATWG/HTML-CSSWG task force on styleable form controls (1 by mfreed7)
    https://github.com/whatwg/html/issues/12380 
  - #12338 Unexpected behavior of `interestfor` with popover controls (1 by shanthambi)
    https://github.com/whatwg/html/issues/12338 [topic: popover] [topic: button] 
  - #12328 [Customizable select] Define UA behavior for interactive content inside <option> (1 by josepharhar)
    https://github.com/whatwg/html/issues/12328 [accessibility] [a11y-tracker] [topic: select] 
  - #12121 Should appearance: base select button have both `all: unset` and `display: contents` ? (1 by josepharhar)
    https://github.com/whatwg/html/issues/12121 [topic: rendering] [topic: select] 
  - #11935 Optional destination size for `HTMLImageElement.decode()` (1 by eeeps)
    https://github.com/whatwg/html/issues/11935 [addition/proposal] [needs implementer interest] [topic: img] 
  - #11724 A way to remove EXIF data on `<input type="file">` before sending to server (1 by pigsonthewing)
    https://github.com/whatwg/html/issues/11724 [addition/proposal] [needs implementer interest] [topic: forms] 
  - #11641 [focusgroup] Declarative directional focus navigation for composite widgets (1 by lukewarlow)
    https://github.com/whatwg/html/issues/11641 [addition/proposal] [needs implementer interest] [stage: 2] 
  - #11548 LLMs Meta Tags Standard (2 by bathos, yas1th)
    https://github.com/whatwg/html/issues/11548 [addition/proposal] [needs implementer interest] 
  - #11287 Spec text for naturalWidth and naturalHeight behavior isn't web-compatible, for cases where attributes are missing (1 by dholbert)
    https://github.com/whatwg/html/issues/11287 [topic: img] [interop] 
  - #11013 WheelEvent (or MouseEvent) should specify a device type (1 by TCOTC)
    https://github.com/whatwg/html/issues/11013 [addition/proposal] [needs implementer interest] 
  - #10707 Reference Target (1 by jstenback)
    https://github.com/whatwg/html/issues/10707 [addition/proposal] [needs implementer interest] [topic: shadow] [accessibility] [stage: 2] 
  - #10378 HTML Video Poster Image: Enable Responsive Images and ALT Text for Poster  (3 by dalecurtis, scottjehl)
    https://github.com/whatwg/html/issues/10378 [addition/proposal] [needs implementer interest] [topic: media] [agenda+] 
  - #2162 Event Source processing model suggests a list should be present (1 by jdm)
    https://github.com/whatwg/html/issues/2162 [clarification] 
  - #1809 [Proposal] New tags <tabsection>, <tablist>, <tab>, <tabpanel> (1 by andyearnshaw)
    https://github.com/whatwg/html/issues/1809 [addition/proposal] [needs implementer interest] 

  6 issues closed:
  - importNode should allow null customElementRegistry https://github.com/whatwg/html/issues/12396 [topic: custom elements] 
  - Proposal: New HTML attributes mustcontain, requiredchars, and preset for simplified form validation https://github.com/whatwg/html/issues/11538 [addition/proposal] [needs implementer interest] 
  - Upcoming WHATNOT meeting on 2026-04-23 https://github.com/whatwg/html/issues/12383 [agenda+] 
  - <meta name="ai:context"> A Standard Convention for Serving Machine-Readable Page Context to AI Agents https://github.com/whatwg/html/issues/12399 [addition/proposal] [needs implementer interest] 
  - Spec text for naturalWidth and naturalHeight behavior isn't web-compatible, for cases where attributes are missing https://github.com/whatwg/html/issues/11287 [topic: img] [interop] 
  - Event Source processing model suggests a list should be present https://github.com/whatwg/html/issues/2162 [clarification] 

* whatwg/dom (+1/-0/💬5)
  1 issues created:
  - importNode should allow null customElementRegistry (by sorvell)
    https://github.com/whatwg/dom/issues/1463 [needs implementer interest] [addition/proposal] 

  2 issues received 5 new comments:
  - #1463 importNode should allow null customElementRegistry (3 by rniwa, sorvell)
    https://github.com/whatwg/dom/issues/1463 [needs implementer interest] [addition/proposal] 
  - #1287 `MutationObserver` flag to observe mutations in (open) shadow trees to facilitate polyfills of HTML syntax (2 by WebReflection)
    https://github.com/whatwg/dom/issues/1287 [topic: shadow] [needs implementer interest] [addition/proposal] [topic: mutation observers] 



Pull requests
-------------
* w3c/html-aria (+0/-0/💬1)
  1 pull requests received 1 new comments:
  - #555 Update select role mapping to use HTML display size (1 by josepharhar)
    https://github.com/w3c/html-aria/pull/555 

* whatwg/html (+4/-0/💬15)
  4 pull requests submitted:
  - 12402  (by annevk)
    https://github.com/whatwg/html/pull/12402 
  - 12400  (by josepharhar)
    https://github.com/whatwg/html/pull/12400 
  - 12397  (by vinhill)
    https://github.com/whatwg/html/pull/12397 
  - 12395  (by noamr)
    https://github.com/whatwg/html/pull/12395 

  9 pull requests received 15 new comments:
  - #12400 Use "self" in select position-try-fallbacks (1 by annevk)
    https://github.com/whatwg/html/pull/12400 [normative change] [topic: forms] [topic: select] 
  - #12397 Upstream Document Picture-in-Picture API (2 by annevk, zcorpan)
    https://github.com/whatwg/html/pull/12397 
  - #12395 Upstream sanitizer api (1 by noamr)
    https://github.com/whatwg/html/pull/12395 
  - #12382 Make naturalWidth & naturalHeight return non-0 when the image lacks a dimension (2 by dholbert)
    https://github.com/whatwg/html/pull/12382 [normative change] [topic: img] 
  - #12375 Update issue templates (1 by annevk)
    https://github.com/whatwg/html/pull/12375 
  - #12345 Simplify popover=hint behaviours & related spec fixes (4 by jakearchibald, mfreed7)
    https://github.com/whatwg/html/pull/12345 
  - #12069 Define base appearance for select multiple drop-down (1 by josepharhar)
    https://github.com/whatwg/html/pull/12069 [agenda+] 
  - #12000 Introduce customelementregistry global attribute (2 by ja-y-son)
    https://github.com/whatwg/html/pull/12000 
  - #11723 [focusgroup] Add the focusgroup attribute  (1 by janewman)
    https://github.com/whatwg/html/pull/11723 

* whatwg/dom (+0/-0/💬1)
  1 pull requests received 1 new comments:
  - #1454 Define processing instruction attributes (1 by foolip)
    https://github.com/whatwg/dom/pull/1454 


Repositories tracked by this digest:
-----------------------------------
* https://github.com/w3c/html-aam
* https://github.com/w3c/html-aria
* https://github.com/w3c/html-extensions
* https://github.com/w3c/htmlwg
* https://github.com/w3c/webcomponents
* https://github.com/whatwg/html
* https://github.com/whatwg/dom


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Received on Monday, 27 April 2026 17:00:33 UTC