Calculates the grid-column CSS property for a specific column index. Accounts for the fact that handles are inserted between columns.
grid-column
The 1-based start index of the column.
The 1-based end index of the column.
A CSS string for grid-column (e.g., "1 / 3").
Calculates the
grid-columnCSS property for a specific column index. Accounts for the fact that handles are inserted between columns.