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what your goal with columnDefs is but you haven't defined the target columns with columnDefs.targets so it probably isn't

This is one way to resolve the issue: <script> $(document).ready(function() { $('#table_data').dataTable({ "order": [[1, "desc"]], "columnDefs": [{ "targets": 0, "data": "download_link", "render": function (data, type, row, meta) { let url = "{{ url_for('confirmation_page', data='DATA') }}".replace('DATA', data); return '<a href="' + url + '">'+data+'</a>'; } }] })}); </script>

You can't set columnDefs with the initialisation options, but you can set the column options using HTML5 attributes as described here. Allan

If I remove columnDefs, "intl" do nothing. My browser is Chrome 73.

application), i used the columndefs to add buttons to

Using bootstrap classes did the trick for the alignment. Also figured out that the proper code is : "columnDefs": [ { "targets": [ 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16 ], "className": "text-right" }, { "targets": [1,2,3,4,5,6,7,8,9,10,11,12], "render": function ( data, type, row, meta ) { return type === 'display'? '<input type="checkbox" name="group' + meta.row + '" /> ' + data:data; } } ]

1,2]; var table = $('#example').DataTable({ columnDefs: [{ visible: false, targets: invisibleItems

the report and the columnDefs array that has a

human readable format $('#example').DataTable( { columnDefs: [ { targets: 1, render: $.fn.dataTable.render.moment(

Hmmm - I can't get the Markdown linking to work with the automatic category selection... Click the "DataTables - Columns" button to show only the columns options (which will work for both columns and columnDefs). Allan