feat(a11y): use list-style-type: "" instead of list-style: none#42526
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In Safari, "list-style: none" removes the list semantic role, so lists are no longer announced by screen readers. Using "list-style-type: \"\"" keeps the same visual result while preserving the list role. Ports #41778 to v6, plus the new v6 list containers (stepper, menu, docs search results). Summary marker removals (accordion header, details summary) are intentionally left as "list-style: none".
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Description
Replace
list-style: nonewithlist-style-type: ""on list containers.This ports #41778 to the v6 branch.
Motivation & Context
In Safari,
list-style: noneremoves the element's semantic list role, so lists are no longer announced as such by screen readers. Usinglist-style-type: ""produces the same visual result (no markers) while preserving the list semantics. See Manuel Matuzović's write-up.What changed
Applied to genuine
<ul>/<ol>containers:scss/_breadcrumb.scss,scss/_nav.scss,scss/_navbar.scss,scss/mixins/_lists.scss(thelist-unstyledmixin), and the_list-group.scsscomment — direct equivalents of the upstream PRscss/_menu.scss— v6's renamed_dropdown.scssscss/_stepper.scssandsite/src/scss/_search.scss— new v6 list containers with the same rationaleIntentionally not changed (these use
list-style: noneto remove the<summary>disclosure marker, not for lists):scss/_accordion.scss(.accordion-header)site/src/scss/_details.scss(.bd-details-summary)site/src/scss/_toc.scssneeds no change — it already routes through thelist-unstyledmixin.Type of changes