Kilotest: Diagnoses of ID not unique violation by HTML element 230 on Human Rights Watch page

Basics

About the page

• URL: https://www.hrw.org/
• Tested 3 days ago on 2026-10-07 at 21:44 by job 261007T2129-oiq
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 2187
  • Violators: 1149
  • Issues: 65
• 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: 54
• Violators: 33

About the violator

• Tag name: mask
• Text: [not applicable]
• Start tag: <mask id="mask0_1358_62" style="mask-type:luminance" maskUnits="userSpaceOnUse" x="0" y="0" width="62" height="62">
• XPath: /html/body/div[1]/div[1]/header[1]/div[1]/div[2]/div[1]/div[1]/svg[1]/g[1]/mask[1]
• 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 230 of the Human Rights Watch page.

1. Duplicate id attribute value "mask0_1358_62" found on the web page.

   Rule engine: HTML CodeSniffer (Squiz Labs)

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

2. Duplicate ID mask0_1358_62.

   Rule engine: Html Checker (World Wide Web Consortium)