Kilotest: Diagnoses of sizes attribute invalid violation by HTML element 988 on Center for Democracy and Technology page

Basics

About the page

• URL: https://cdt.org/
• Tested 3 days ago on 2026-10-07 at 19:43 by job 261007T1941-nud
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 1226
  • Violators: 632
  • Issues: 48
• Download the full technical report (JSON)

About the issue

• Why it matters: Item behaves improperly
• Priority: highest
• Related WCAG standard: 1.3.1
• Reported by 1 rule engine (Html Checker API)
• Violations: 10
• Violators: 10

About the violator

• Tag name: IMG
• Text: [not applicable]
• Start tag: <img src="https://cdt.org/wp-content/uploads/2026/06/civic-tech-500x281.jpg" alt="" loading="lazy" class="media-figure__source media-figure__source--lazy " srcset="https://cdt.org/wp-content/uploads/2026/06/civic-tech-500x281.jpg 500w, https://cdt.org/wp-content/uploads/2026/06/civic-tech-300x169.jpg 300w, https://cdt.org/wp-content/uploads/2026/06/civic-tech-1024x576.jpg 1024w, https://cdt.org/wp-content/uploads/2026/06/civic-tech-768x432.jpg 768w, https://cdt.org/wp-content/uploads/2026/06/civic-tech-1536x864.jpg 1536w, https://cdt.org/wp-content/uploads/2026/06/civic-tech-2048x1152.jpg 2048w, https://cdt.org/wp-content/uploads/2026/06/civic-tech-100x56.jpg 100w, https://cdt.org/wp-content/uploads/2026/06/civic-tech-250x141.jpg 250w, https://cdt.org/wp-content/uploads/2026/06/civic-tech-1000x563.jpg 1000w, https://cdt.org/wp-content/uploads/2026/06/civic-tech-1500x844.jpg 1500w, https://cdt.org/wp-content/uploads/2026/06/civic-tech-2000x1125.jpg 2000w" data-sizes-applied="false">
• XPath: [not obtained]
• Bounding box: x = 1227, y = 3475, width = 453, height = 453
• Reported by Html Checker API

Diagnoses

Here is how rule engines diagnose the sizes attribute invalid issue for HTML element 988 of the Center for Democracy and Technology page.

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

   Rule engine: Html Checker API (World Wide Web Consortium)