This attribute allows developers to specify the intrinsic size of a media element (<img>, <video>, <svg:image>). With this attribute media elements will maintain their aspect ratios. Developers need only specify one dimension, either a percentage or pixel value, and the other dimension will be computed immediately without causing a visual re-flow.



Status in Chromium


No longer pursuing (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.

  • No signal
  • No signal
  • No signals



This proposal is no longer active. Instead, efforts are focused on the alternate approach described here:

Last updated on 2021-05-05