Kilotest: Diagnoses of attribute value invalid violation by HTML element 1258 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 1258

• Tag name: IMG
• Text: [not applicable]
• Start tag: <img loading="lazy" sizes="373px" srcset="https://static.wixstatic.com/media/0991d1_5c6b9359e61a4494b68866592c27438f~mv2.jpg/v1/fill/w_373,h_750,al_c,q_80,usm_0.66_1.00_0.01,enc_avif,quality_auto/Cartel%20Biblioteca%20III%20Jornada%20-%20WEB.jpg 1x, https://static.wixstatic.com/media/0991d1_5c6b9359e61a4494b68866592c27438f~mv2.jpg/v1/fill/w_746,h_1500,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/Cartel%20Biblioteca%20III%20Jornada%20-%20WEB.jpg 2x" id="img_comp-mhts49pa" src="https://static.wixstatic.com/media/0991d1_5c6b9359e61a4494b68866592c27438f~mv2.jpg/v1/fill/w_373,h_750,al_c,q_80,usm_0.66_1.00_0.01,enc_avif,quality_auto/Cartel%20Biblioteca%20III%20Jornada%20-%20WEB.jpg" alt="Cartel Biblioteca III Jornada - WEB.jpg" style="object-fit:cover" class="KDamZi sFiSiq" width="373" height="750">
• XPath: [not obtained]
• Bounding box: x = 566, y = 8656, width = 373, height = 750

About the attribute value 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 value invalid issue for HTML element 1258 of the Cátedra UNESCO Legislación, Sociedad y Patrimonio page.

1. Bad value for attribute srcset on element img: Expected width descriptor but found 1x at …-%20WEB.jpg 1x,. (When the sizes attribute is present, all image candidate strings must specify a width.)

   Tool: Html Checker API (World Wide Web Consortium)