The ContentOnlySettingsMenu breaks the ARIA menu pattern

[afercia]

Description

#62354 introduced a ContentOnlySettingsMenu component that is then used in a few places in the editor. This component adds a menu item and a paragraph with some extr ainformation inside a few dropdown menus.

The dropdown menus are ARIA menus. They can only contain specific roles and they cannot contain paragraphs.

There have been ohter cases in the past where extraneous content was added inside ARIA menus and they all have been raised as issues and fixed. I'm surprised extraneous content has been added to ARIA menus again as this has been reported a few times already for previous cases. See for example:
#58313
#13390
#12505
#5953

It's worth reminding:

Important

An ARIA menu can only contain elements with role group, separator, menuitem and the menuitems variants. It can not contain anything else.

Reference:

https://www.w3.org/TR/wai-aria-1.2/#menubar
Required Owned Elements:

• group → menuitem
• group → menuitemradio
• group → menuitemcheckbox
• menuitem
• menuitemcheckbox
• menuitemradio

The presence of the paragraph with extra information:

• Breaks the ARIA pattern.
• Screen reader users can't reach this paragraph. As such, this information isn't available to them. Tabbing or arrows navigation skips the paragraph and only navigates through the menu items. In order to reach the paragraph, screen reader users would have to exit 'focus mode' and use hte built-in arrows navigation of the screen reader virtual cursor mode, which is totally unexpected.

Note: For the ones that only test with VoiceOver on macOS, the behavior described above only happens with Windows screen readers. VoiceOv er has a different interaction model which is, in a way, non-standard.

Also important:
I seem to recall there were checks in place to make sure an UI with role=menu only contains the expected roles. Not sure if something has changed in that regard or maybe the checks I'm thinking at are specific to some other component. Cc @youknowriad

Regardless, this extraneous content inside the ARIA menus must be removed as it totally breaks the expected semantics and interaction.

From a design perspective, I'd argue this isn't a great design pattern as some important information is buried down inside a dropdown menu, which is just a good way to hide important information,

@WordPress/gutenberg-components given this happened a few times already, it appeaers to me there should be some kind of mechanism to ensure an ARIA menu doesn't contain extraneous content. Is there any way to make sure an ARIA menu only contains menu items? Thanks.

Cc @ramonjd @talldan @kevin940726

Step-by-step reproduction instructions

To see an example of this pattern follo the steps below. Other example are in the screenshot in the original PR #62354

• Edit a post and add a Query Loop block.
• Choose a pattern for the Query Loop block e.g. 'Standard`.
• Once the block renders itis content, click 'Options' in the block toolbar.
• Observe the dropdown menu contains a paragraph with some extra information.

Screenshots, screen recording, code snippet

Environment info

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

[ciampo]

given this happened a few times already, it appeaers to me there should be some kind of mechanism to ensure an ARIA menu doesn't contain extraneous content. Is there any way to make sure an ARIA menu only contains menu items? Thanks.

This kind of runtime checks are not easy to write, can be costly and they are not perfect — it's possible for developers who really want to do something will find a way regardless. Especially if the "invalid" items are injected via a slot/fill.

The best solution, IMO, is to add e2e tests that check these menus