Kilotest: Diagnoses of ID not unique violation by HTML element 78 on Wikimedia Foundation page

Basics

About the page

• URL: https://wikimediafoundation.org/
• Tested 3 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: LINK
• Text: [not applicable]
• Start tag: <link rel="stylesheet" id="all-css-4" href="https://wikimediafoundation.org/wp-content/plugins/lottie-lite/build/lottie.css?m=1790864964g" type="text/css" media="all">
• XPath: /html/head[1]/link[23]
• Bounding box: [not obtained]
• Reported by Html Checker + HTML CodeSniffer

Diagnoses

Here is how rule engines diagnose the ID not unique issue for HTML element 78 of the Wikimedia Foundation page.

1. Duplicate id attribute value "all-css-4" found on the web page.

   Rule engine: HTML CodeSniffer (Squiz Labs)

   Rule: E-WCAG2AAA.Principle4.Guideline4_1.4_1_1.F77

2. Duplicate ID all-css-4.

   Rule engine: Html Checker (World Wide Web Consortium)