CSRF token for AJAX call in attached javascript file

maybe this helps? Kr Jan

VIEW:
<input type="hidden" class="txt_csrfname" name="<?=csrf_token() ?>" value="<?=csrf_hash() ?>" />

JAVASCRIPT:

$('#functionInJSfile').DataTable({
'processing': true,
'serverSide': true,
'serverMethod': 'post',
'ajax': {
'url':"",
'data': function(data){
// CSRF Hash
var csrfName = $('.txt_csrfname').attr('name'); // CSRF Token name
var csrfHash = $('.txt_csrfname').val(); // CSRF hash

return {
data: data,
[csrfName]: csrfHash // CSRF Token
};
},
dataSrc: function(data){

// Update token hash
$('.txt_csrfname').val(data.token);

// Datatable data
return data.aaData;
}
},