Web features explorer - Anchor positioning

Anchor positioning places an element based on the position of another element. For example, you can place a tooltip next to the content it references.

Browser support (view on caniuse.com)

Chrome Not supported Bugs: 382294252 373874012 346521300 352360007 40281992 40059176
Chrome Android Not supported
Edge Not supported
Firefox Not supported Position: positive Bugs: 1838746
Firefox for Android Not supported Position: positive
Safari Not supported Position: support
Safari on iOS Not supported Position: support

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MDN documentation

CSS anchor positioning

Specifications

CSS Anchor Positioning Module Level 1 (#anchoring), from Cascading Style Sheets (CSS) Working Group (W3C).

Usage (according to Chrome Platform Status)

~4.699% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

Interop

Included in Interop 2025
Included in Interop 2026

Surveys

View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist