Kilotest: Diagnoses of z-index not zero violation by HTML element 166 on Oregon Museum of Science and Industry page

Basics

About the Oregon Museum of Science and Industry page

• URL: https://omsi.edu/
• Tested 20 days ago by job 42w on 2026-05-12 at 23:14

About HTML element 166

• Tag name: BUTTON
• Text: Manage Consent … mmMwWLliI0fiflO&1
• Start tag: <button id="backToTop" class="back-to-top lg:hidden" aria-label="Back to top">
• XPath: /html/body/button[1]
• Bounding box: x = 0, y = 0, width = 0, height = 0

About the z-index not zero issue

• Why it matters: User cannot predict the effect of clicking
• Priority: lowest
• Related WCAG standard: 1.4

Diagnoses

Here is how tools diagnose the z-index not zero issue for HTML element 166 of the Oregon Museum of Science and Industry page.

1. z-index style property of the element is 1000

   Tool: Testaro (CVS Health)

   Rule: zIndex