[csswg-drafts] [css-gaps-1] Empty space in the stacking axis should not be part of a gap (#14154)

jav099 has just created a new issue for https://github.com/w3c/csswg-drafts:

== [css-gaps-1] Empty space in the stacking axis should not be part of a gap ==
### Context

Along the stacking axis, a grid lanes container can contain empty space that is
*not* an authored gutter.

### Problem

Empty space in the stacking axis is very ambiguous, as it can be used for dense-packing 
and alignment.

### Proposal

- A stacking-axis **gap is exactly the authored gutter** , the used
  `row-gap` / `column-gap` value carried by the owning item. Empty
  space beyond that gutter is **not part of any gap** and therefore has **no gap
  decoration**. Otherwise, there would be no way of aligning the decorations above a spanner, which an author might want with `rule-break: none`;


<img width="691" height="612" alt="Image" src="https://github.com/user-attachments/assets/9ba991d3-60b0-42c3-88b4-c0fafe87bbd6" />

_A stacking-axis gap is only the authored gutter. The full-width spanners (4) and (5) each take one rule; the empty space left under the shorter items (2) and (3) is not a gap and takes no decoration._


Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/14154 using your GitHub account


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Received on Thursday, 9 July 2026 22:06:50 UTC