Add aria-expanded to add semantic value and styling | egghead.io
Olivero primary search button should be initialized with aria-expanded=" false" by JS [#3223332] | Drupal.org
Adrian Roselli (parody) 🗯 on Twitter: "Otherwise, the ARIA disclosure widget can be useful for replacing tool-tips, making more accessible navigation, and more. I cover some use cases: https://t.co/0y5jPx6k5C BTW, those first
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52355 (Twenty Twenty: remove aria-expanded on Close Search button) – WordPress Trac
Remove aria-expanded on menu UL element? · Issue #1289 · Automattic/_s · GitHub
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Did Sharepoint 2016 misspell 'aria-expanded' for its list header sort arrow links? - SharePoint Stack Exchange
aria-expanded: the Good and the Bad - Leader in Offshore Accessibility Testing | Section 508 Compliance | WCAG Conformance | BarrierBreak
bug(cdk-tree): aria-expanded attribute should not appear in the leaf node · Issue #21922 · angular/components · GitHub
Building Accessible Menu Systems — Smashing Magazine