Kilotest: Diagnoses of z-index not zero violation by HTML element 16 on Institute for Progress US Energy Data Electricity Demand page

Basics

About the page

• URL: https://usenergydata.org/electricity-demand/
• Tested 3 days ago on 2026-10-07 at 21:52 by job 261007T2132-e35
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 11
    • Reported any rule violations: 10
  • Violations: 1524
  • Violators: 204
  • Issues: 40
• Download the full technical report (JSON)

About the issue

• Why it matters: User cannot predict the effect of clicking
• Priority: lowest
• Related WCAG standard: 1.4
• Reported by 1 rule engine (Testaro)
• Violations: 7
• Violators: 7

About the violator

• Tag name: HEADER
• Text: US Energy … All Charts
• Start tag: <header class="site-header">
• XPath: /html/body/header[1]
• Bounding box: x = 0, y = 0, width = 1920, height = 64
• Reported by Testaro

Take me there

Diagnoses

Here is how rule engines diagnose the z-index not zero issue for HTML element 16 of the Institute for Progress US Energy Data Electricity Demand page.

1. z-index style property of the element is 200

   Rule engine: Testaro (CVS Health)

   Rule: zIndex