[csswg-drafts] [css-grid] Add additional example when to re-run column sizing based on rows. (#6356)

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

== [css-grid] Add additional example when to re-run column sizing based on rows. ==
We have multiple issues (5-6) in our bug tracker where people are expecting the grid sizing algorithm to re-run based on an update size of the rows. E.g.
https://bugs.chromium.org/p/chromium/issues/detail?id=849233
https://bugs.chromium.org/p/chromium/issues/detail?id=1150080
(there are lots more but all more of less have the same structure).

We added a couple of `.tentative.html` tests based on this:
http://wpt.live/css/css-grid/grid-items/grid-item-inline-contribution-001.html
http://wpt.live/css/css-grid/grid-items/grid-item-inline-contribution-002.tentative.html
http://wpt.live/css/css-grid/grid-items/grid-item-inline-contribution-003.tentative.html

(001 doesn't fall into the "re-run" category but we noticed implementations were sometimes resolving against the grid height - not the row height).

We are 90% sure this is desired by the specification, e.g.
https://drafts.csswg.org/css-grid-2/#algo-overview

```
 Then, if the min-content contribution of any grid item has changed based on the row sizes and alignment calculated in step 2, re-resolve the sizes of the grid columns with the new min-content and max-content contributions (once only).
```

Both 002/003 have a grid-item which will have initially an indefinite height, then definite (in the 2nd pass) causing the min-content size to change.

It'd be good if this was explicitly called out in the note listing example for when this occurs.


Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/6356 using your GitHub account


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Received on Monday, 7 June 2021 18:06:27 UTC