Kilotest: Diagnoses of attribute invalid violation by HTML element 328 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 328

• Tag name: BUTTON
• Text: Open Search
• Start tag: <button id="search-toggle" on="tap:AMP.setState( { searchVisible: !searchVisible } ), search-form-2.focus" aria-controls="search-menu" [aria-expanded]="searchVisible ? 'true' : 'false'" aria-expanded="false">
• XPath: /html/body/div[1]/header[1]/div[1]/div[1]/div[3]/div[2]/button[1]
• Bounding box: x = 1532, y = 21, width = 28, height = 37

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 328 of the Tradeoffs page.

1. Attribute on not allowed on element button at this point.

   Tool: Html Checker API (World Wide Web Consortium)

2. Attribute [aria-expanded] not allowed on element button at this point.

   Tool: Html Checker API (World Wide Web Consortium)