Kilotest: Diagnoses of attribute invalid violation by HTML element 103 on Taproot Foundation page

Basics

About the page

• URL: https://taprootfoundation.org/
• Tested 3 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: HEADER
• Text: Work With Us … Find Pro Bono Opportunities
• Start tag: <header class="site-header" data-section-theme="inverse" x-data="{ open: null, mobileOpen: false, section: null }" x-effect="document.body.style.overflow = mobileOpen ? 'hidden' : ''" @keydown.escape.window="open = null; mobileOpen = false" @click.outside="open = null">
• XPath: /html/body/header[1]
• Bounding box: x = 0, y = 0, width = 1920, height = 105
• Reported by Html Checker

Diagnoses

Here is how rule engines diagnose the attribute invalid issue for HTML element 103 of the Taproot Foundation page.

1. Attribute x-data not allowed on element header at this point.

   Rule engine: Html Checker (World Wide Web Consortium)

2. Attribute x-effect not allowed on element header at this point.

   Rule engine: Html Checker (World Wide Web Consortium)

3. Attribute @keydown.escape.window not allowed on element header at this point.

   Rule engine: Html Checker (World Wide Web Consortium)

4. Attribute @click.outside not allowed on element header at this point.

   Rule engine: Html Checker (World Wide Web Consortium)