Databases columns.width function is not working

arunkumar90

I am trying to archive fixed column width https://datatables.net/reference/option/columns.width with responsive datatables

$('#example').dataTable( {
"columnDefs": [
{ "width": "20%", "targets": 0 }
]
} );

but if the column text is grater than specified with like ( "width": "20%") it is auto resizing the column width.
how can i restrict it fit within column width and trim excess using ellipsis ?