act-rules
Element with role has required states and properties - Failed example 1 [4e8ab6]
More ARIA versioning issues.
<div role="combobox" aria-expanded="true"></div>
https://act-rules.github.io/rules/4e8ab6#failed-example-1
ARIA 1.0 combobox pattern - aria-expanded always required , aria-owns not listed as required - should be used when aria-autocomplete=list (but should rather than must)
https://www.w3.org/TR/wai-aria-1.0/roles#combobox
https://www.w3.org/TR/wai-aria-practices/#wai-aria-roles-states-and-properties-6
ARIA 1.1 combobox pattern - aria-expanded always required, aria-controls only set to set to popup element
when expanded
https://www.w3.org/TR/wai-aria-1.1/#combobox
https://www.w3.org/TR/wai-aria-practices/#wai-aria-roles-states-and-properties-6
ARIA 1.2 combobox pattern - aria-expanded and aria-controls always required with aria-controls always set to popup element
https://www.w3.org/TR/wai-aria-1.2/#combobox
The problem is that the ARIA 1.1 spec supports both the 1.0 and 1.1 combobox:
The ARIA 1.0 specification describes a combobox pattern where a text input element has the combobox role and owns a listbox element. User agents, assistive technologies, and conformance checkers SHOULD continue to support the ARIA 1.0 pattern so that existing implementations of the ARIA 1.0 pattern remain functional. https://www.w3.org/TR/wai-aria-1.1/#combobox
tl;dr; until ARIA 1.2 moves to CR the only required attribute for role=combbox is aria-expanded because ARIA 1.1 supports both the 1.1 and 1.0 combobox patterns, so failed example 1 is a pass
I tend to agree. I think we should leave this rule for what it is until ARIA 1.2 makes it to rec. At the moment, the only required prop that doesn't have a default, or some caveat that allows an out in ARIA 1.1 is aria-controls on scrollbar. ARIA 1.2 is much stricter, and appropriately so I think, but I think we're going to have to wait for that to be published before we put more work into this rule. That also means we're not taking the rule to the TF any time soon.
Decision from the CG: leave this rule as is, knowing there is an issue with it, until ARIA 1.2 is out. We're not passing this rule onto the TF yet.
Some useful background reading on the design process that led to the combobox 1.2 pattern, and the problems with the 1.1 pattern:
https://github.com/w3c/aria/wiki/Resolving-ARIA-1.1-Combobox-Issues
