Kilotest: Diagnoses of ID not unique violation by HTML element 236 on Human Rights Watch contact page

Basics

About the page

• URL: https://www.hrw.org/contact-us
• Tested 3 days ago on 2026-10-07 at 21:44 by job 261007T2129-ov7
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 1653
  • Violators: 652
  • Issues: 54
• 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 + HTML CodeSniffer)
• Violations: 16
• Violators: 12

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]/a[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 236 of the Human Rights Watch contact 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)