Allow 1.1 values for aria-haspopup in 1.0 pattern

[carmacleod]

Fixes issue #1025

Direct link to preview of Combobox Roles, States and Properties section

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Preview | Diff

[css-meeting-bot]

The ARIA Authoring Practices (APG) Task Force just discussed Values of haspopup other than true for ARIA 1.0 comboboxes.

The full IRC log of that discussion

<AnnAbbott> TOPIC: Values of haspopup other than true for ARIA 1.0 comboboxes
<Jemma> https://github.com//pull/1029
<zcorpan> GitHub: https://github.com//pull/1029
<AnnAbbott> mck: ramifications are it may/may not work with screen readers
<AnnAbbott> Carolyn: works with many screen readers. Am using a dialog and seems to work pretty well, better than 1.1 which doesn't announce combobox
<AnnAbbott> mck: JAWS only sees parent div
<AnnAbbott> Carolyn: announces as text field
<AnnAbbott> mck: doesn't see it in reading mode, announces as text field in forms mode
<AnnAbbott> mck: if supported in pattern then 1) should be supporting in pattern and 2) possible problem with screen reader implementation
<CurtBellew> present +
<AnnAbbott> mck: currently is invisible in read mode and subsumed in edit mode
<AnnAbbott> mck: if a grid is used inside of input, don't know how it would work
<AnnAbbott> bg: if using aria-owns instead of aria controls, it works
<AnnAbbott> mck: Microsoft objected at F2F meeting
<Jemma> what is "that" idea you mean, Matt?
<Jemma> "that" using aria-control?
<AnnAbbott> bg: can we talk about this on Thursday?
<AnnAbbott> mck: sure
<AnnAbbott> mck: objecting to relationship between combobox and grid
<AnnAbbott> mck: why do we need to call it a combobox?
<AnnAbbott> mck: combobox needs autocomplete
<AnnAbbott> bg: role doesn't define behavior
<AnnAbbott> mck: don't need owns, just need controls
<AnnAbbott> bg: have patterns for 1.0 and 1.1 that work
<AnnAbbott> bg: 1.1 changed because of how it works
<AnnAbbott> mck: spec says owns on edit and controls on parent
<AnnAbbott> mck: compromise is combobox on parent div and screen readers need to implement
<AnnAbbott> mck: then just need to fix 1.1 pattern

[mcking65]

This has been addressed by the rewrite of the combobox pattern for ARIA 1.2.