Kilotest: Diagnoses of attribute invalid violation by HTML element 135 on Tradeoffs page

Basics

About the Tradeoffs page

• URL: https://tradeoffs.org/
• Tested 30 days ago by job 5g2 on 2026-06-20 at 13:59

About HTML element 135

• Tag name: NAV
• Text: [not applicable]
• Start tag: <nav class="tertiary-menu nav3" aria-label="Tertiary Menu" toolbar-target="tertiary-nav-contain" toolbar="(min-width: 767px)">
• XPath: /html/body/aside[1]/nav[1]
• Bounding box: x = 3226, y = 60, width = 594, height = 29

About the attribute invalid issue

• Why it matters: Item behaves improperly
• Priority: highest
• Related WCAG standard: 1.3.1

Diagnoses

Here is how rule engines diagnose the attribute invalid issue for HTML element 135 of the Tradeoffs page.

1. Attribute toolbar-target not allowed on element nav at this point.

   Tool: Html Checker API (World Wide Web Consortium)

2. Attribute toolbar not allowed on element nav at this point.

   Tool: Html Checker API (World Wide Web Consortium)