Kilotest: Diagnoses of code invalid violation by HTML element 377 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 377

• Tag name: MAIN
• Text: Reporting on health care’s toughest choices. … Load More Stories
• Start tag: <main id="main" class="site-main">
• XPath: /html/body/div[1]/div[1]/section[1]/main[1]
• Bounding box: x = 360, y = 138, width = 1200, height = 6893

About the code invalid issue

• Why it matters: Invalid code in the document may prevent a helper from working
• Priority: high
• Related WCAG standard: 4.1

Diagnoses

Here is how rule engines diagnose the code invalid issue for HTML element 377 of the Tradeoffs page.

1. The main element must not appear as a descendant of the section element.

   Tool: Html Checker API (World Wide Web Consortium)