Kilotest: Diagnoses of attribute invalid violation by HTML element 273 on Sightline Institute page

Here is how tools diagnose the attribute invalid issue for HTML element 273 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 273
  • Take me there
  • Tag name: DIV
  • Text: Climate + Energy … …
  • Start tag: <div class="gb-container gb-container-d6497016 gb-tabs__item gb-tabs__item-open" id="gb-tab-item-d6497016" aria-labelledby="gb-tab-button-97ae4ddd">
  • XPath: [not obtained]
  • Bounding box: x = 424, y = 1260, width = 1072, height = 1225

Diagnoses

1. Elements must only use permitted ARIA attributes

   Tool: Axe (Deque)

   Rule: aria-prohibited-attr

2. The ARIA attributes "aria-labelledby" are not valid for the element <div> with implicit ARIA role "generic"

   Tool: Accessibility Checker (IBM)

   Rule: aria_attribute_valid