Open Bug 1924792 Opened 1 year ago Updated 11 days ago

Implement position-area "shifting" for containing block overflow

Categories

(Core :: Layout, enhancement, P3)

Product:
Core
Component:
Layout
Type:
enhancement

Tracking

()

People

(Reporter: jwatt, Unassigned)

References

(Blocks 1 open bug)

Details

(Whiteboard: [anchorpositioning:backlog])

At the end of the position-area section there is a note about shifting when there's containing block overflow. We'll need to implement this behaviour.

Whiteboard: [anchorpositioning:m1]
Whiteboard: [anchorpositioning:m1] → [anchorpositioning:pickup]
Whiteboard: [anchorpositioning:pickup] → [anchorpositioning:m1][anchorpositioning:pickup]

Also see spec resolution added to "see also," that avoids layout inconsistencies when anchor is out of vs within the initial viewport.
However, I am unsure of what WPT implications, if any, as a result of this behaviour change.

See Also: → https://github.com/w3c/csswg-drafts/issues/10861
Whiteboard: [anchorpositioning:m1][anchorpositioning:pickup] → [anchorpositioning:reserve]
Whiteboard: [anchorpositioning:reserve] → [anchorpositioning:backlog]
Summary: Implement anchor positioned element "shifting" for containing block overflow → Implement position-area "shifting" for containing block overflow

Not really part of the initial support, which has landed. Changing this to block the main meta bug.

Blocks: css-anchor-position-1
No longer blocks: 1909336
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