CSS anchor positioning replaces JavaScript for pinning UI elements to page anchors

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Two new CSS properties, anchor-name and position-anchor, now allow developers to pin elements like dropdowns and tooltips to a reference element without JavaScript. The position-area property uses a 3×3 grid concept to control placement, while position-try-fallbacks handles overflow by automatically switching to alternate positions when space is limited. A flip-block keyword can reverse placement and adjust directional properties such as margins automatically. CSS Anchor Positioning Level 1 reached all major browsers by January 2026 and covers approximately 81% of global users as of July 2026. Level 2, which adds anchored container queries for restyling based on active placement, has around 64% coverage and should be feature-detected separately.

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