Kilotest: Diagnoses of attribute invalid violation by HTML element 728 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 728

• Tag name: mask
• Text: [not applicable]
• Start tag: <mask id="maskClose" mask-type="alpha" maskUnits="userSpaceOnUse" x="5" y="5" width="15" height="14">
• XPath: /html/body/div[4]/div[1]/div[2]/svg[1]/mask[1]
• Bounding box: x = 0, y = 0, width = 0, height = 0

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 728 of the Tradeoffs page.

1. Attribute mask-type not allowed on element mask at this point.

   Tool: Html Checker API (World Wide Web Consortium)