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

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

Basics

• About the attribute invalid issue
  • Why it matters: Item behaves improperly
  • Priority: highest
  • Related WCAG standard: 1.3.1
• 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. The ARIA attributes "aria-orientation" are not valid for the element <div> with ARIA role "none"

   Tool: Accessibility Checker (IBM)

   Rule: aria_attribute_valid

2. ARIA attributes used are not allowed for the element's role.

   Tool: WallyAX (Wally)

   Rule: Ensure ARIA attributes used are permitted for the element's role.