Note: We strive to keep the polyfill up-to-date with ongoing changes to the spec, and we welcome code contributions and financial support to make that happen.
bottom center ✅
span-left top ✅
center left ✅
inline-start block-end ✅
start end ✅
end ✅
no space around anchor, end start ✅
no block space around anchor, span-all left ✅
no block space around anchor, span-all top ✅
inline styles ✅
One declaration, different containing blocks ✅
Anchor inset values need to be different for each element matching a declaration, as their values depend on their containing blocks. Should be `right bottom`.
Shifting content to stay inside containing block ❌
Things should get shifted to stay within the containing block.
span-all positioned correctly on non-centered anchors ❌
Should be positioned on anchor-center, not center.
cascade should be respected ❌
Should be right top.
At OddBird, we love contributing to the languages & tools developers rely on. We’re currently working on polyfills for new Popover & Anchor Positioning functionality, as well as CSS specifications for functions, mixins, and responsive typography. Help us keep this work sustainable and centered on your needs as a developer! We display sponsor logos and avatars on our website.
Sponsor OddBird’s OSS Work