Kilotest: Diagnoses of sizes attribute invalid violation by HTML element 519 on 350 Sacramento page

Basics

About the 350 Sacramento page

• URL: https://350sacramento.org/
• Tested 28 days ago by job 029 on 2026-05-04 at 16:59

About HTML element 519

• Tag name: IMG
• Text: [not applicable]
• Start tag: <img decoding="async" class="img-with-animation skip-lazy nectar-lazy" data-delay="0" height="499" width="980" data-animation="none" data-nectar-img-src="https://350sacramento.org/wp-content/uploads/2025/04/350-Sacramento-Youth-Action-Group-Photo2.jpg" src="data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20980%20499'%2F%3E" alt="350 Sacramento Youth Climate Justice Action Group Photo" data-nectar-img-srcset="https://350sacramento.org/wp-content/uploads/2025/04/350-Sacramento-Youth-Action-Group-Photo2.jpg 980w, https://350sacramento.org/wp-content/uploads/2025/04/350-Sacramento-Youth-Action-Group-Photo2-300x153.jpg 300w, https://350sacramento.org/wp-content/uploads/2025/04/350-Sacramento-Youth-Action-Group-Photo2-768x391.jpg 768w" sizes="(max-width: 980px) 100vw, 980px">
• XPath: [not obtained]
• Bounding box: x = 325, y = 3556, width = 462, height = 235

About the sizes attribute invalid issue

• Why it matters: Item behaves improperly
• Priority: highest
• Related WCAG standard: 1.3.1

Diagnoses

Here is how tools diagnose the sizes attribute invalid issue for HTML element 519 of the 350 Sacramento page.

1. The sizes attribute must only be specified if the srcset attribute is also specified.

   Tool: Html Checker API (World Wide Web Consortium)