Kilotest: Diagnoses of attribute invalid violation by HTML element 137 on Taproot Foundation contact page

Basics

About the page

• URL: https://taprootfoundation.org/contact
• Tested 2 days ago on 2026-10-07 at 22:20 by job 261007T2148-sru
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 11
    • Reported any rule violations: 11
  • Violations: 644
  • Violators: 233
  • Issues: 35
• Download the full technical report (JSON)

About the issue

• Why it matters: Item behaves improperly
• Priority: highest
• Related WCAG standard: 1.3.1
• Reported by 1 rule engine (Html Checker)
• Violations: 47
• Violators: 22

About the violator

• Tag name: LI
• Text: Tools
• Start tag: <li class="site-header__item" @mouseenter="open = 'tools'" @mouseleave="open = null">
• XPath: /html/body/header[1]/div[2]/nav[1]/ul[1]/li[3]
• Bounding box: x = 1183, y = 32, width = 35, height = 72
• Reported by Html Checker

Diagnoses

Here is how rule engines diagnose the attribute invalid issue for HTML element 137 of the Taproot Foundation contact page.

1. Attribute @mouseenter not allowed on element li at this point.

   Rule engine: Html Checker (World Wide Web Consortium)

2. Attribute @mouseleave not allowed on element li at this point.

   Rule engine: Html Checker (World Wide Web Consortium)