Breaking: #96708 - Removed support for accesskeys in HMENU

Description

TYPO3's built-in support for menu generation, adding accesskey HTML attributes to menu items has been removed.

As stated by various sources such as

• https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/accesskey#accessibility_concerns
• https://webaim.org/standards/wcag/checklist#:~:text=accesskey%20should%20typically%20be%20avoided

this feature should only be used by explicitly defining access keys when a use-case is given.

TYPO3 menus previously used a random link title as an access key, when the TypoScript property HMENU.accessKey = 1 was set.

Along with the accessKey functionality, the public property TypoScriptFrontendController->accessKey has been removed.

Impact

Setting the TypoScript option has no effect anymore.

Accessing the removed public property will trigger a PHP warning. The extension scanner will detect usages as weak match.

Affected Installations

TYPO3 installations using the accessKey feature of HMENU or accessing the accessKey property of TypoScriptFrontendController.

TYPO3 installations using the global accesskey HTML attribute in their own code will still work as before.

Migration

Using the accesskey HTML attribute should be avoided in general, but if needed, integrators should add it to their templates in a sensible way, depending on the accessibility needs.