focused
DataTableHeader.key of the column that currently has keyboard focus, or null when focus is on a whole row rather than a cell.
Only meaningful once DataTable's cellNavigation is on, or a column is editable.
DataTableHeader.key of the column that currently has keyboard focus, or null when focus is on a whole row rather than a cell.
Only meaningful once DataTable's cellNavigation is on, or a column is editable.