Kilotest: Diagnoses of aria attribute invalid violation by HTML element 441 on Clean Air Task Force (CATF) page

Basics

About the page

• URL: https://www.catf.us/
• Tested 3 days ago on 2026-10-07 at 19:52 by job 261007T1941-eso
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 12
  • Violations: 697
  • Violators: 328
  • Issues: 52
• Download the full technical report (JSON)

About the issue

• Why it matters: Item behavior violates user expectations
• Priority: highest
• Related WCAG standard: 4.1.2
• Reported by 3 rule engines (Accessibility Checker + Alfa + Axe)
• Violations: 36
• Violators: 12

About the violator

• Tag name: SPAN
• Text: Fusion Energy
• Start tag: <span class="cat-menu-item__icon" aria-hidde="true">
• XPath: /html/body/div[2]/div[1]/div[6]/div[1]/div[1]/div[1]/ul[1]/li[5]/a[1]/span[1]
• Bounding box: x = 895, y = 5549, width = 31, height = 22
• Reported by Accessibility Checker + Alfa + Axe

Diagnoses

Here is how rule engines diagnose the aria attribute invalid issue for HTML element 441 of the Clean Air Task Force (CATF) page.

1. The attribute is not defined

   Rule engine: Alfa (Siteimprove)

   Rule: r20

2. ARIA attributes must conform to valid names; Invalid ARIA attribute name: aria-hidde

   Rule engine: Axe (Deque)

   Rule: aria-valid-attr

3. The attribute(s) 'aria-hidde' referenced by the element <span> is not a valid ARIA state or property

   Rule engine: Accessibility Checker (IBM)

   Rule: aria_attribute_allowed