Kilotest: Diagnoses of attribute value invalid violation by HTML element 642 on Effective Environmentalism contact page

Basics

About the page

• URL: https://www.effectiveenvironmentalism.org/contact-us
• Tested 3 days ago on 2026-10-07 at 21:12 by job 261007T2109-69c
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 12
    • Reported any rule violations: 11
  • Violations: 885
  • Violators: 299
  • 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 API)
• Violations: 26
• Violators: 26

About the violator

• Tag name: IMG
• Text: [not applicable]
• Start tag: <img sizes="39px" srcset="https://static.wixstatic.com/media/9a2976_ded4a7a8c8c946dd9b7379bb5fc04aca~mv2.png/v1/fill/w_39,h_39,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/9a2976_ded4a7a8c8c946dd9b7379bb5fc04aca~mv2.png 1x, https://static.wixstatic.com/media/9a2976_ded4a7a8c8c946dd9b7379bb5fc04aca~mv2.png/v1/fill/w_78,h_78,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/9a2976_ded4a7a8c8c946dd9b7379bb5fc04aca~mv2.png 2x" id="img_0_comp-lv46vos7" src="https://static.wixstatic.com/media/9a2976_ded4a7a8c8c946dd9b7379bb5fc04aca~mv2.png/v1/fill/w_39,h_39,al_c,q_85,usm_0.66_1.00_0.01,enc_avif,quality_auto/9a2976_ded4a7a8c8c946dd9b7379bb5fc04aca~mv2.png" alt="Substack newsletter" style="object-fit:cover" class="ZK9snE sFiSiq" width="39" height="39">
• XPath: [not obtained]
• Bounding box: x = 490, y = 931, width = 39, height = 39
• Reported by Html Checker API

Diagnoses

Here is how rule engines diagnose the attribute value invalid issue for HTML element 642 of the Effective Environmentalism contact page.

1. Bad value for attribute srcset on element img: Expected width descriptor but found 1x at …aca~mv2.png 1x,. (When the sizes attribute is present, all image candidate strings must specify a width.)

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