Update css-anchor-positioning for a Safari bug#7387
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pomerantsev wants to merge 1 commit intoFyrd:mainfrom
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Update css-anchor-positioning for a Safari bug#7387pomerantsev wants to merge 1 commit intoFyrd:mainfrom
pomerantsev wants to merge 1 commit intoFyrd:mainfrom
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Adds a link to a reproduction. The bug is currently fixed in Safari Technology Preview, so I didn't file a webkit bug. In the real world, the library I'm maintaining has to do browser sniffing because some of its functionality is broken due to this bug with anchor positioning in Safari: https://github.com/pomerantsev/accented/blob/4312cae5b4dde15b09806e84b3ced3e18ea997ac/packages/accented/src/utils/supports-anchor-positioning.ts#L1-L8
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pomerantsev
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Oct 6, 2025
| "1":"Can be enabled via the `#enable-experimental-web-platform-features` flag in `chrome://flags`", | ||
| "2":"Can be enabled using the `layout.css.anchor-positioning.enabled` flag. Enabled by default in Firefox Nightly only" | ||
| "2":"Can be enabled using the `layout.css.anchor-positioning.enabled` flag. Enabled by default in Firefox Nightly only", | ||
| "3": "There's a [bug with `position: fixed` and non-initial containing blocks](https://codepen.io/pavelp/pen/KwVPrrB)." |
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I'm not sure if a link to a personal codepen is appropriate here, so I'm happy to use it as a conversation starter and discuss what a more durable alternative could be if this change is overall acceptable.
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Dec 20, 2025
Anchor positioning in Safari 26.0 was buggy (see Fyrd/caniuse#7387), so I had to create a special case to never use anchor positioning in that browser. Now the bugs are fixed, and Accented no longer supports 26.0, so it's time to retire this special case.
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Adds a link to a reproduction.
The bug is currently fixed in Safari Technology Preview, so I didn't file a webkit bug.
In the real world, the library I'm maintaining has to do browser sniffing
because some of its functionality is broken due to this bug with anchor positioning in Safari:
https://github.com/pomerantsev/accented/blob/4312cae5b4dde15b09806e84b3ced3e18ea997ac/packages/accented/src/utils/supports-anchor-positioning.ts#L1-L8