Anchor positioning animations and transitions
Limited availability
The anchor() and anchor-size() CSS functions animate or transition on changes such as the anchor box moving or the anchor element changing.
Browser support
- Chrome 125 Released on 2024-05-14
- Chrome Android 125 Released on 2024-05-14
- Edge 125 Released on 2024-05-17
- Firefox Not supported
- Firefox for Android Not supported
- Safari 26 Released on 2025-09-15
- Safari on iOS 26 Released on 2025-09-15
Baseline availability blocked since September 2025 by Firefox (12 months)
MDN documentation
No MDN documentation found. You can search for the feature on MDN. If you believe that MDN has no documentation about this feature, you can open an issue on MDN's GitHub repository.Specifications
View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist