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decrease the number of columns when open by mobile

The better way is to use columns().nodes() rather than picking out the cells yourself. You can still pass in the search 'applied' into columns(). Would you mind posting the code you are using? Thanks Tom

but I want to edit columns that are not displayed on the DataTable. Is that possible? Yes - example available here. Allan

If you want to dynamically change the visibility or order of columns, use https://datatables.net/reference/option/columns.visible and https://datatables.net/reference/api/colReorder.order()

following $('#example'String).DataTable( { data: ar1.data, columns: [ { data: "first_name" }, { data: "last_name"},

this: $("#grdScarti").dataTable({ data: arRow, columns: function () { for (x = 0;

Does your server-side script take account of the fact that the columns have changed position and therefore their indexes will have changed? Allan

to fixed header and columns.

for your response, Allan. columns: [ { data: 0, "sortable": false,

When the init was run, the columns().every performed that logic on the current position of the columns. So variable column in your change event is tied to the column. Check out updated Fiddle. http://jsfiddle.net/s8JmF/522/