How to use CSS anchor positioning

The 2023 State of CSS survey highlighted that many developers lack familiarity with the CSS feature of anchor positioning, prompting an introduction to this layout technique, which aims to overcome the limitations of absolute positioning by allowing elements to be tethered relative to each other without needing JavaScript. This new method, currently in an experimental stage, is supported in Chrome Canary behind a feature flag and offers increased flexibility and performance by keeping tethering code within the CSS layer. Anchor positioning allows for more robust designs as elements can be positioned anywhere in the DOM and adjusted dynamically to avoid viewport clipping. It introduces concepts like anchor elements and anchor target elements, enabling developers to describe fallback scenarios and position elements relative to multiple anchors. Despite limited browser support as of late 2023, developers can use a polyfill to experiment with anchor positioning, which offers advantages over absolute positioning by eliminating the need for JavaScript and improving performance and design flexibility.

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