Answers for "data table adjust column width"

datatables change width of columns

$('#example').dataTable( {
  "autoWidth": false, // might need this
  "columns": [
    { "width": "20%" },
    null, // automatically calculates
    null  // remaining width
  ]
} );

data table column width

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