JavaScript Data GridSelection Overview
Users can select rows, ranges or use a simple text selection from inside the grid.
Row Selection selects rows, i.e. data entries from the provided data set.

Range Selection selects ranges of cells, i.e. a rectangular block of cells.

If you want to use a regular text selection as if the grid were a regular table, set enableCellTextSelection=true
and ensureDomOrder=true
in the gridOptions.
