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Remove aria-expanded from listbox #1862

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Remove aria-expanded from listbox #1862

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smhigley
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@smhigley smhigley commented Jan 26, 2023 •
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Closes #1026

TL:DR; I believe the history of this is that it was added when the expandable listbox was proposed as an alternative to the ARIA 1.1 combobox pattern. Now that we have the updated combobox pattern, there doesn't seem to be any benefit to keeping aria-expanded supported on listbox.

I wasn't sure if the best approach was to remove the attribute entirely (as in this PR), or:

  • keep it in the table, but with "(deprecated)" after it, similar to the "(deprecated on this role in ARIA 1.2)" we have for former global attrs.
  • add a note in the listbox section about it being deprecated in ARIA 1.X
  • Related Core AAM Issue/PR: N/A
  • Related AccName Issue/PR: N/A
  • Related APG Issue/PR: N/A (expandable listbox example already removed)
  • Any other dependent changes? N/A

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@smhigley smhigley added this to the ARIA 1.4 milestone Jan 26, 2023
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I think for consistency with other removed attributes, it would be useful to explicitly state "deprecated" for aria-expanded as well

@smhigley smhigley mentioned this pull request Jan 26, 2023
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@spectranaut spectranaut self-assigned this Feb 22, 2024
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Since this has approving reviews, and we talked about it in a meeting, I'm going to make issues on browsers and validators

@spectranaut spectranaut added the waiting for implementations add to traking issue when PR is merged into main, but can't be merged into stable label Feb 22, 2024
@spectranaut spectranaut mentioned this pull request Apr 25, 2024
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spectranaut commented Apr 25, 2024 •
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I'm trying to understand if this has browser implications, but I can't find in the spec anything that says user agents shouldn't expose aria attributes that are not list in the "supported states and properties" list. I wonder if I missing something...?

edit: nevermind, its in core-aam:
Some WAI-ARIA properties are not global, and are only supported on certain roles. If a non-global WAI-ARIA state or property is used where it is not supported, user agents SHOULD NOT map the given WAI-ARIA property to the platform accessibility API.

This was referenced Apr 26, 2024
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webkit-commit-queue pushed a commit to WebKit/WebKit that referenced this pull request Apr 27, 2024
@twilco
AX: ARIA: remove aria-expanded from supported attributes from role li…
d7b2a91 
…stbox

https://bugs.webkit.org/show_bug.cgi?id=273333
rdar://problem/127124652

Reviewed by Chris Fleizach.

aria-expanded was added as a supported attribute for the listbox ARIA role when the notion of an expandable listbox
was being explored. This is now unnecessary as combobox has become the canonical way to implement this pattern, and
thus the ARIA spec is removing listbox's support for aria-expanded.

w3c/aria#1862

* Source/WebCore/accessibility/AccessibilityNodeObject.cpp:
(WebCore::AccessibilityNodeObject::setNode): Deleted.
Drive-by fix to delete this unused function.
* Source/WebCore/accessibility/AccessibilityNodeObject.h:
* Source/WebCore/accessibility/AccessibilityObject.cpp:
(WebCore::AccessibilityObject::supportsExpanded const):
* LayoutTests/platform/mac/accessibility/aria-expanded-supported-roles-expected.txt:
* LayoutTests/platform/glib/accessibility/aria-expanded-supported-roles-expected.txt:

Canonical link: https://commits.webkit.org/278080@main
WilcoFiers
WilcoFiers suggested changes Apr 29, 2024
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Instead of removing this, can it be listed as deprecated? There is nothing bad about people using this, even if there's no major benefit to it.

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Wilco's comment on the issue opened on axe: dequelabs/axe-core#4433 (comment)

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it's not consistently exposed now, and per the linked Webkit issue it seems support will go down.

fwiw, i'm not opposed to marking it as deprecated for 1.3 - but maybe this PR should then be the start of addressing some of the conversation of #1990 - calling out why something was deprecated / is slated for future removal.

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Discussed in https://www.w3.org/2024/05/02-aria-minutes.html#t05

The decision was to create a deprecation section in the spec, and list this attribute there.

@pkra pkra added the spec:aria label Jun 14, 2024
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@WilcoFiers WilcoFiers WilcoFiers requested changes

@cookiecrook cookiecrook cookiecrook approved these changes

@pkra pkra pkra approved these changes

@scottaohara scottaohara scottaohara approved these changes

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Revisit allowed roles for aria-expanded
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@smhigley @JAWS-test @spectranaut @scottaohara @cookiecrook @pkra @WilcoFiers @jnurthen