Kilotest: Diagnoses of ID not unique violation by HTML element 386 on Environmental Working Group page

Basics

About the page

• URL: https://www.ewg.org/
• Tested 3 days ago on 2026-10-07 at 21:15 by job 261007T2112-2p4
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 12
  • Violations: 1488
  • Violators: 693
  • Issues: 63
• 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 3 rule engines (ASLint + Html Checker API + HTML CodeSniffer)
• Violations: 7
• Violators: 5

About the violator

• Tag name: H2
• Text: News & Insights
• Start tag: <h2 id="main-menu">
• XPath: [not obtained]
• Bounding box: [not obtained]
• Reported by Html Checker API + HTML CodeSniffer

Diagnoses

Here is how rule engines diagnose the ID not unique issue for HTML element 386 of the Environmental Working Group page.

1. Duplicate id attribute value "main-menu" found on the web page.

   Rule engine: HTML CodeSniffer (Squiz Labs)

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

2. Duplicate ID main-menu.

   Rule engine: Html Checker API (World Wide Web Consortium)