Kilotest: Diagnoses of sizes attribute invalid violation by HTML element 568 on National Coalition Against Censorship page

Basics

About the page

• URL: https://ncac.org/
• Tested 3 days ago on 2026-10-07 at 21:59 by job 261007T2138-qpt
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 619
  • Violators: 284
  • Issues: 49
• 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)
• Violations: 2
• Violators: 2

About the violator

• Tag name: IMG
• Text: [not applicable]
• Start tag: <img src="https://ncac.org/wp-content/uploads/2019/02/Resources.png" class="disable-lazyload ls-bg" alt="" decoding="async" srcset="https://ncac.org/wp-content/uploads/2019/02/Resources-200x82.png 200w, https://ncac.org/wp-content/uploads/2019/02/Resources-300x123.png 300w, https://ncac.org/wp-content/uploads/2019/02/Resources-400x164.png 400w, https://ncac.org/wp-content/uploads/2019/02/Resources-530x217.png 530w, https://ncac.org/wp-content/uploads/2019/02/Resources-600x245.png 600w, https://ncac.org/wp-content/uploads/2019/02/Resources-768x314.png 768w, https://ncac.org/wp-content/uploads/2019/02/Resources-800x327.png 800w, https://ncac.org/wp-content/uploads/2019/02/Resources.png 1100w" style="margin: 0px; z-index: auto;" data-ls-slidein="2" data-ls-slideout="2" data-ls-hidden="" data-ls-layer-id="2">
• XPath: [not obtained]
• Bounding box: [not obtained]
• Reported by Html Checker

Diagnoses

Here is how rule engines diagnose the sizes attribute invalid issue for HTML element 568 of the National Coalition Against Censorship 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 (World Wide Web Consortium)