Web features explorer

field-sizing

Newly Available (since 2026-06-16)
Expected to be Widely Available on 2028-12-16

The field-sizing CSS property allows form controls such as <textarea> to be sized based on their content.

Browser support

  • Chrome 123 Released on 2024-03-19
  • Chrome Android 123 Released on 2024-03-19
  • Edge 123 Released on 2024-03-22
  • Firefox 152 Released on 2026-06-16
  • Firefox for Android 152 Released on 2026-06-16
  • Safari 26.2 Released on 2025-12-12
  • Safari on iOS 26.2 Released on 2025-12-12

Usage (according to Chrome Platform Status)

~1.782% of page loads. More data at chromestatus.com.

Developer use cases

  • Make `<textarea>` autogrow. I've wanted this feature for decades! Better late than never :) Make `<textarea>` autogrow. I've wanted this feature for decades! Better late than never :) [see original comment]
  • allow chat content box when talking to llm to increase in size as the text increases so as not to hide text (to a certain limit) allow chat content box when talking to llm to increase in size as the text increases so as not to hide text (to a certain limit) [see original comment]
  • Have the same UI cross browser, Currently I accommodate non field-sizing browsers by checking if they are supported in css Have the same UI cross browser, Currently I accommodate non field-sizing browsers by checking if they are supported in css [see original comment]