Kilotest: Diagnoses of attribute obsolete violation by HTML element 2850 on Cátedra UNESCO Legislación, Sociedad y Patrimonio page

Basics

About the Cátedra UNESCO Legislación, Sociedad y Patrimonio page

• URL: https://catedrapatrimonio.wixsite.com/ugto
• Tested 13 days ago by job auj on 2026-07-07 at 18:07

About HTML element 2850

• Tag name: IFRAME
• Text: [not applicable]
• Start tag: <iframe data-src="https://www.youtube.com/embed/Xo50zQUWmeQ?wmode=transparent&amp;autoplay=0&amp;mute=0&amp;theme=dark&amp;controls=1&amp;autohide=1&amp;loop=1&amp;showinfo=0&amp;rel=0&amp;enablejsapi=0&amp;playlist=Xo50zQUWmeQ" src="https://www.youtube.com/embed/Xo50zQUWmeQ?wmode=transparent&amp;autoplay=0&amp;mute=0&amp;theme=dark&amp;controls=1&amp;autohide=1&amp;loop=1&amp;showinfo=0&amp;rel=0&amp;enablejsapi=0&amp;playlist=Xo50zQUWmeQ" height="100%" width="100%" frameborder="0" title="External YouTube" aria-label="External YouTube" data-testid="youtube" allowfullscreen="">
• XPath: [not obtained]
• Bounding box: x = 994, y = 23430, width = 363, height = 246

About the attribute obsolete issue

• Why it matters: Document includes obsolete code that the browser may fail to process
• Priority: high
• Related WCAG standard: 4.1

Diagnoses

Here is how rule engines diagnose the attribute obsolete issue for HTML element 2850 of the Cátedra UNESCO Legislación, Sociedad y Patrimonio page.

1. The frameborder attribute on the iframe element is obsolete. Use CSS instead.

   Tool: Html Checker API (World Wide Web Consortium)