Kilotest: Diagnoses of sizes attribute invalid violation by HTML element 395 on 350 Sacramento page

Here is how tools diagnose the sizes attribute invalid issue for HTML element 395 of the 350 Sacramento page.

Basics

• About the sizes attribute invalid issue
  • Why it matters: Item behaves improperly
  • Priority: highest
  • Related WCAG standard: 1.3.1
• About the 350 Sacramento page
  • URL: https://350sacramento.org/
  • Tested on 2026-04-02 at 14:10
• About HTML element 395
  • Tag name: IMG
  • Text: [not applicable]
  • Start tag: <img fetchpriority="high" decoding="async" class="img-with-animation skip-lazy nectar-lazy" data-delay="0" height="300" width="300" data-animation="none" data-nectar-img-src="https://350sacramento.org/wp-content/uploads/2024/09/Earth-Love-350-Sacramento--300x300.png" src="data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20viewBox%3D'0%200%20300%20300'%2F%3E" alt="350 Sacramento - Logo by Gianna for 2024 Ode to Earth - Climate Justice, Art, Culture Festival" data-nectar-img-srcset="https://350sacramento.org/wp-content/uploads/2024/09/Earth-Love-350-Sacramento--300x300.png 300w, https://350sacramento.org/wp-content/uploads/2024/09/Earth-Love-350-Sacramento--150x150.png 150w, https://350sacramento.org/wp-content/uploads/2024/09/Earth-Love-350-Sacramento--140x140.png 140w, https://350sacramento.org/wp-content/uploads/2024/09/Earth-Love-350-Sacramento--100x100.png 100w, https://350sacramento.org/wp-content/uploads/2024/09/Earth-Love-350-Sacramento--500x500.png 500w, https://350sacramento.org/wp-content/uploads/2024/09/Earth-Love-350-Sacramento--350x350.png 350w, https://350sacramento.org/wp-content/uploads/2024/09/Earth-Love-350-Sacramento-.png 709w" sizes="(max-width: 300px) 100vw, 300px">
  • XPath: [not obtained]
  • Bounding box: x = 370, y = 1724, width = 185, height = 185

Diagnoses

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

   Tool: Html Checker API (World Wide Web Consortium)