Kilotest: Violations of invalid at-rule issue for Prometheus page

Here are the HTML elements reported to violate rules belonging to the invalid at-rule issue.

Basics

About the invalid at-rule issue

Why it matters: Document cannot be properly displayed in particular contexts

Priority: high

Related WCAG standard: 4.1

Violator count: 1

Reported by 1 tool (Html Checker API)

About the Prometheus page

URL: https://www.joinprometheus.org/

Tested by job 2ft on 2026-04-07 at 19:19

Violators

1. Element 0

   • XPath: /html
   • Tag name: HTML
   • Reported by Html Checker API
   • What diagnoses were reported?