Kilotest: Diagnoses of ID not unique violation by HTML element 1 on Wikimedia Foundation page

Basics

About the page

• URL: https://wikimediafoundation.org/
• Tested 2 days ago on 2026-10-07 at 23:16 by job 261007T2305-8ye
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 1201
  • Violators: 392
  • Issues: 68
• Download the full technical report (JSON)

About the issue

• Why it matters: User may be pointed to the wrong item
• Priority: highest
• Related WCAG standard: 4.1
• Reported by 4 rule engines (ASLint + Html Checker + HTML CodeSniffer + QualWeb)
• Violations: 74
• Violators: 38

About the violator

• Tag name: HEAD
• Text: [not applicable]
• Start tag: <head>
• XPath: /html/head[1]
• Bounding box: [not obtained]
• Reported by ASLint

Diagnoses

Here is how rule engines diagnose the ID not unique issue for HTML element 1 of the Wikimedia Foundation page.

1. Attribute <code>id="all-css-4"</code> should be unique. It has been defined 2 times.

   Rule engine: ASLint (eSSENTIAL Accessibility)

   Rule: duplicated_id_attribute

2. Attribute <code>id="all-css-4"</code> should be unique. It has been defined 2 times.

   Rule engine: ASLint (eSSENTIAL Accessibility)

   Rule: duplicated_id_attribute