Kilotest: Diagnoses of sizes attribute invalid violation by HTML element 299 on Portland State University Senior Adult Learning Center page

Basics

About the Portland State University Senior Adult Learning Center page

• URL: https://www.pdx.edu/senior-adult-learning-center/
• Tested 30 days ago by job gr7 on 2026-05-03 at 04:33

About HTML element 299

• Tag name: SOURCE
• Text: [not applicable]
• Start tag: <source srcset="/senior-adult-learning-center/sites/senioradultlearningcenter.web.wdt.pdx.edu/files/styles/large_hero_media_extra_large_1440_x_587/public/2024-09/20170518_PSU_Spring_345.jpg?h=790be497&amp;itok=y78y1cfJ 1x" media="(min-width: 1200px)" type="image/jpeg" width="1440" height="587">
• XPath: [not obtained]
• Bounding box: x = 960, y = 121, width = 0, height = 0

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 299 of the Portland State University Senior Adult Learning Center page.

1. When the srcset attribute has any image candidate string with a width descriptor, the sizes attribute must also be specified.

   Tool: Html Checker API (World Wide Web Consortium)

2. When the srcset attribute has any image candidate string with a width descriptor, the sizes attribute must also be specified.

   Tool: Html Checker API (World Wide Web Consortium)