Kilotest: Diagnoses of ID not unique violation by HTML element 96 on Freedom of the Press Foundation page

Basics

About the page

• URL: https://freedom.press/
• Tested 3 days ago on 2026-10-07 at 21:40 by job 261007T2129-eze
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 377
  • Violators: 189
  • Issues: 43
• 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 API + HTML CodeSniffer + QualWeb)
• Violations: 19
• Violators: 12

About the violator

• Tag name: mask
• Text: [not applicable]
• Start tag: <mask id="a" width="18" height="18" x="0" y="0" maskUnits="userSpaceOnUse" style="mask-type:alpha">
• XPath: /html/body/div[1]/header[1]/div[1]/div[1]/nav[1]/ul[1]/li[2]/button[1]/svg[1]/mask[1]
• Bounding box: x = 0, y = 0, width = 0, height = 0
• Reported by Html Checker API

Diagnoses

Here is how rule engines diagnose the ID not unique issue for HTML element 96 of the Freedom of the Press Foundation page.

1. Duplicate ID a.

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