Kilotest: Diagnoses of sizes attribute invalid violation by HTML element 639 on Synchronicity Earth USA Annual Reports and Spotlight page

Basics

About the page

• URL: https://www.synchronicityearth.org/about-us/annualreview/
• Tested 3 days ago on 2026-10-07 at 22:06 by job 261007T2139-gxp
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 11
    • Reported any rule violations: 10
  • Violations: 499
  • Violators: 198
  • Issues: 63
• 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: SOURCE
• Text: [not applicable]
• Start tag: <source type="image/webp" data-lazy-srcset="https://www.synchronicityearth.org/wp-content/uploads/2017/12/logo-wearth-bigger_@2x-300x67.png.webp 300w, https://www.synchronicityearth.org/wp-content/uploads/2017/12/logo-wearth-bigger_@2x-540x120.png.webp 540w, https://www.synchronicityearth.org/wp-content/uploads/2017/12/logo-wearth-bigger_@2x.png.webp 541w" sizes="(max-width: 300px) 100vw, 300px">
• XPath: /html/body/div[1]/div[3]/div[2]/footer[1]/div[1]/div[1]/div[1]/section[1]/picture[1]/source[1]
• Bounding box: x = 375, y = 2524, width = 0, height = 18
• Reported by Html Checker

Diagnoses

Here is how rule engines diagnose the sizes attribute invalid issue for HTML element 639 of the Synchronicity Earth USA Annual Reports and Spotlight page.

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

   Rule engine: Html Checker (World Wide Web Consortium)