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[css-display] How are 'list-item run-in flow' and 'list-item block flow-root' serialized? #1493
Description
Some display values with list-item keyword can be shortened to a single keyword:
list-item block flowcan be shortened tolist-itemlist-item inline flowcan be shortened toinline-list-item
Some display values with list-item keyword require all three keywords:
list-item run-in flow-rootlist-item inline flow-root
The other display values with list-item keyword can be shortened to two keywords:
list-item run-in flowcan be shortened tolist-item run-inlist-item block flow-rootcan be shortened tolist-item flow-root
This question is about the last case. Do they serialize to the two-keyword shortened form, or do they stay in the full form?
CSS Display says
Following the precedence rules of “most backwards-compatible, then shortest”, serialization of equivalent display values uses the “Short display” column.
So it seems short forms are preferred, but these combinations do not appear in the summary table!
Activity
tabatkins commentedon Jul 11, 2017
The table is an informative guide to help authors, not a normative and complete mapping table. The note at the end is just that—a note, reminding you that things get serialized to their shortest form, and that the table contains many of those. But the "3 keywords that can be written as 2" is already covered by that general principle.
(However, see #1564.)
fantasai commentedon Jul 11, 2017
(Marking Wontfix because we won't fix the informative table; but the serialization should be clearly defined in CSSOM, and #1564 is open against it to ensure it contains the general rules for serialization once again.)