Kilotest: Diagnoses of attribute value invalid violation by HTML element 24 on Prometheus page

Here is how tools diagnose the attribute value invalid issue for HTML element 24 of the Prometheus page.

Basics

• About the attribute value invalid issue
  • Why it matters: Item behaves improperly
  • Priority: highest
  • Related WCAG standard: 1.3.1
• About the Prometheus page
  • URL: https://www.joinprometheus.org/
  • Tested on 2026-04-07 at 19:19
• About HTML element 24
  • Tag name: SCRIPT
  • Text: [not applicable]
  • Start tag: <script type="wix/htmlEmbeds" id="pageHtmlEmbeds.head start">
  • XPath: /html/head[1]/script[12]
  • Bounding box: x = 0, y = 0, width = 0, height = 0

Diagnoses

1. Bad value pageHtmlEmbeds.head start for attribute id on element script: An ID must not contain whitespace.

   Tool: Html Checker API (World Wide Web Consortium)