<baseline-position>

<baseline-position> = [ first | last ]? && baseline

The <baseline-position> enumerated value type is specified using an optional first or last modifier with the baseline value. If a box does not belong to a shared alignment context, then the fallback alignment is used. The fallback alignment is also used to align the baseline-sharing group within its alignment container.

baseline

Computes to first baseline, as defined below.

first baseline

Aligns the alignment baseline of the box's first baseline set with the corresponding baseline of its baseline-sharing group. The fallback alignment is safe self-start for self-alignment or safe start for content distribution.

last baseline

Aligns the alignment baseline of the box's last baseline set with the corresponding baseline of its baseline-sharing group. The fallback alignment is safe self-end for self-alignment or safe end for content distribution.

• Properties that use this data type: align-content, align-items, align-self, justify-items, justify-self, place-content, place-items, and place-self
• Other box alignment data types: <content-distribution>, <content-position>, <overflow-position>, and <self-position>
• CSS box alignment module
• CSS flexible box layout module
• CSS grid layout module