Drag strip anchored to the right edge of a resizable header cell. The outer
element is a 5px transparent hit zone; a 1px ::before pseudo-element draws
a persistent subtle divider that thickens and colors on hover/drag.
Absolutely positioned — requires the parent HeadCell to be position: relative.
Active drag state is exposed via the data-resizing attribute.
Drag strip anchored to the right edge of a resizable header cell. The outer element is a 5px transparent hit zone; a 1px
::beforepseudo-element draws a persistent subtle divider that thickens and colors on hover/drag. Absolutely positioned — requires the parent HeadCell to beposition: relative. Active drag state is exposed via thedata-resizingattribute.