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the icons showing which columns the table is currently

option to the DataTables columns options that will inform

working with the rows(), columns() and cells() methods it

the table; cells, rows, columns etc. Many of the

saveRow). The number of columns and which columns can

the change to 12 columns in Bootstrap we just

2'500 rows and 5 columns has 12'500 TD cells

features such as fixed columns or CSV, PDF and

releases, in particular the columns.render and columns.data options. This

three of the five columns will be shown by

Maybe add a classname to those columns and use something like ":not(.my-classname)". Or use column numbers. If this doesn't help please build a test case showing an example of what you have so we can provide more specific ideas. Kevin

many tables and same columns thank you again Davide

You would use either columns, or columnDefs, not both. If you need to define all columns (perhaps because you're using ajax objects), then put all the config into columns, Colin

work. You have 5 columns defined. Do you have

Not a bug. DT requires the same number of columns in each row. Are you setting default content values in your DT columns initialisation?

and 'columndefs' for defining columns. How may I use

buttons should export all columns: 'copy', 'csv', 'excel', 'pdf'

Try removing columnDefs and just apply the config in columns. Something like this: columns: [ { "data": null, defaultContent: "", "targets": 'selectionCol', orderable: false, className: 'select-checkbox' }, { "data": "FIO" }, { "data": "FullPostNameRU" }, { "data": "depnameRU" } ], Kevin

Yep, the header class won't trickle down onto the column's cells. As silkspin said, columns.className is the way to go, Colin

initComplete callback. table.columns().visible(false); Using columns() without a column-selector will result in selecting