Update css-anchor-positioning for a Safari bug #7387
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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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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