Kilotest: Diagnoses of aria attribute invalid violation by HTML element 218 on Sightline Institute page

Here is how tools diagnose the aria attribute invalid issue for HTML element 218 of the Sightline Institute page.

Basics

• About the aria attribute invalid issue
  • Why it matters: Item behavior violates user expectations
  • Priority: highest
  • Related WCAG standard: 4.1.2
• About the Sightline Institute page
  • URL: https://www.sightline.org/
  • Tested on 2026-04-03 at 04:04
• About HTML element 218
  • Take me there
  • Tag name: DIV
  • Text: All … Housing + Cities
  • Start tag: <div class="gb-container gb-container-3cbf3052 gb-tabs__buttons" aria-orientation="horizontal">
  • XPath: /html/body/div[2]/div[1]/div[1]/main[1]/article[1]/div[1]/div[1]/div[3]/div[1]/div[1]/div[1]/div[1]
  • Bounding box: x = 424, y = 1196, width = 1072, height = 45

Diagnoses

1. Elements must only use supported ARIA attributes; ARIA attribute is not allowed: aria-orientation="horizontal"

   Tool: Axe (Deque)

   Rule: aria-allowed-attr

2. [failed] The `aria-orientation` property is neither inherited nor supported by the `role` generic.

   Tool: QualWeb (University of Lisbon)

   Rule: QW-ACT-R25