Kilotest: Diagnoses of attribute obsolete violation by HTML element 587 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: Page includes obsolete code that the browser may fail to process
• Priority: high
• Related WCAG standard: 4.1
• Reported by 2 rule engines (ASLint + Html Checker)
• Violations: 3
• Violators: 3

About the violator

• Tag name: SCRIPT
• Text: [not applicable]
• Start tag: <script id="" text="" charset="" type="text/javascript" src="https://static.klaviyo.com/onsite/js/klaviyo.js?company_id=YfKTRB">
• XPath: /html/body/script[4]
• Bounding box: [not obtained]
• Reported by Html Checker

Diagnoses

Here is how rule engines diagnose the attribute obsolete issue for HTML element 587 of the Taproot Foundation page.

1. The only allowed value for the charset attribute for the script element is utf-8. (But the attribute is not needed and should be omitted altogether.)

   Rule engine: Html Checker (World Wide Web Consortium)