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first to have the columnDefs applied appropriately?

gt;' : null; }, data: 'image_id' }], columnDefs: [ {orderable: false, targets: [1]}

class="group"><td colspan="6">'+group+'</td></tr>' ); last = group; } }); }, columnDefs: [ { "visible": false, "targets": 2

adding it to the columnDefs property, it would probably

The columnDefs documentation has information about the difference between the two. Basically use columnDefs if you don't want to have to specify something for every single column. Allan

initialisation for the datatable: , "columnDefs": [{ "defaultContent": "", "targets": "_all" }] The

Just to clarify you can have the same code as before but just remove the data: property. e.g "columnDefs": [ { "targets": 3, "render": function ( data, type, full, meta ) { return '<a href="http://www.mcwd.org/docs/resolutions/'+data+'" target="_blank">Download</a>'; } } ]

six. You can use columnDefs if you don't want

Then remove your current first and last columnDefs config and modify to following and try. { responsivePriority: 1, targets: [-1, 0] },

Yes. Just add additional entry to columns or columnDefs in DataTable config and HTML th, if applicable.