Kilotest: Diagnoses of speculation rules script element invalid violation by HTML element 0 on Prometheus page

Basics

About the Prometheus page

URL: https://www.joinprometheus.org/
Tested 29 days ago by job hzk on 2026-05-03 at 17:00

About HTML element 0

Tag name: HTML
Text: [not applicable]
Start tag: <html lang="en" style="--cookie-banner-primary-color: #221039; --cookie-banner-secondary-color: #FFFFFF;">
XPath: /html
Bounding box: x = 0, y = 0, width = 1920, height = 1080

About the speculation rules script element invalid issue

Why it matters: Document navigation performs poorly
Priority: lowest
Related WCAG standard: 1.3.1

Diagnoses

Here is how tools diagnose the speculation rules script element invalid issue for HTML element 0 of the Prometheus page.

Each rule in the prefetch array must only contain the properties source, urls, where, and eagerness.
Tool: Html Checker API (World Wide Web Consortium)
A script element with a type attribute whose value is speculationrules must contain a JSON object with at least one of the properties prefetch or prerender.
Tool: Html Checker API (World Wide Web Consortium)