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)
~15.444% of page loads. More data at chromestatus.com.Web Platform Tests (WPT)
View the latest WPT test results for this featureInterop
- Included in Interop 2023
- Included in Interop 2024
Surveys
- State of CSS 2026 > usage > favorite new features
- State of CSS 2026 > other features > other features pain points features
- State of CSS 2026 > other features > other features pain points
- State of CSS 2026 > all features > all features
- State of CSS 2025 > reading list > reading list
- State of CSS 2025 > features > all features
- State of CSS 2024 > reading list > reading list
- State of CSS 2024 > features > all features
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