Kilotest: Diagnoses of attribute invalid violation by HTML element 235 on Taproot Foundation page

Basics

About the page

• URL: https://taprootfoundation.org/
• Tested 2 days ago on 2026-10-07 at 23:08 by job 261007T2305-4se
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 508
  • Violators: 244
  • 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: 66
• Violators: 33

About the violator

• Tag name: BUTTON
• Text: Mission
• Start tag: <button type="button" class="site-header__mobile-row" :class="{ 'is-open': section === 'mission' }" aria-controls="site-header-mobile-mission" :aria-expanded="section === 'mission'" @click="section = section === 'mission' ? null : 'mission'" aria-expanded="false">
• XPath: /html/body/header[1]/nav[1]/ul[1]/li[1]/button[1]
• Bounding box: [not obtained]
• Reported by Html Checker

Diagnoses

Here is how rule engines diagnose the attribute invalid issue for HTML element 235 of the Taproot Foundation page.

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

   Rule engine: Html Checker (World Wide Web Consortium)

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

   Rule engine: Html Checker (World Wide Web Consortium)

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

   Rule engine: Html Checker (World Wide Web Consortium)