Kilotest: Diagnoses of attribute invalid violation by HTML element 120 on Taproot Foundation contact page

Basics

About the page

• URL: https://taprootfoundation.org/contact
• Tested 3 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: A
• Text: Advance Pro Bono
• Start tag: <a href="/advance-pro-bono" class="site-header__trigger" :class="{ 'is-open': open === 'advance-pro-bono' }" aria-controls="site-header-panel-advance-pro-bono" :aria-expanded="open === 'advance-pro-bono'" @click="if (open !== 'advance-pro-bono') { $event.preventDefault(); open = 'advance-pro-bono' }" aria-expanded="false">
• XPath: /html/body/header[1]/div[2]/nav[1]/ul[1]/li[2]/a[1]
• Bounding box: x = 1016, y = 58, width = 127, height = 20
• Reported by Html Checker

Diagnoses

Here is how rule engines diagnose the attribute invalid issue for HTML element 120 of the Taproot Foundation contact page.

1. Attribute :class not allowed on element a at this point.

   Rule engine: Html Checker (World Wide Web Consortium)

2. Attribute :aria-expanded not allowed on element a at this point.

   Rule engine: Html Checker (World Wide Web Consortium)

3. Attribute @click not allowed on element a at this point.

   Rule engine: Html Checker (World Wide Web Consortium)