Web features explorer

Registered custom properties

Newly Available (since 2024-07-09)
Expected to be Widely Available on 2027-01-09

The CSS.registerProperty() static method and the @property CSS at-rule register custom properties for which types and behaviors can be defined.

Browser support

  • Chrome 85 Released on 2020-08-25
  • Chrome Android 85 Released on 2020-08-25
  • Edge 85 Released on 2020-08-27
  • Firefox 128 Released on 2024-07-09
  • Firefox for Android 128 Released on 2024-07-09
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27

MDN documentation

Specifications

Usage (according to Chrome Platform Status)

~16.979% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

Interop

Surveys

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