<img sizes="auto" loading="lazy">
The sizes="auto" attribute for the <img> HTML element reserves layout space for an image before it loads, avoiding some layout shifts. This attribute only applies to images with the loading="lazy" attribute.
Status
Limited availability
MDN documentation
Specifications
- HTML (#valdef-sizes-auto), from HTML Workstream (WHATWG).
Browser support
- Chrome 126 Released on 2024-06-11
- Chrome Android 126 Released on 2024-06-11
- Edge 126 Released on 2024-06-13
- Firefox ❌ See bugzil.la/1819581
- Firefox for Android ❌ See bugzil.la/1819581
- Safari ❌ See webkit.org/b/253143
- Safari on iOS ❌ See webkit.org/b/253143
Developer signals
- State of HTML 2025: reading_list/reading_list question
- State of HTML 2025: features/all_features question
Usage (according to Chrome Platform Status)
~0.656% of page loads. More data at chromestatus.com.
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