Uncaught TypeError: Cannot read property 'className' of undefined

Question

The following error is being thrown in Google Chrome\'s developers tools:

Uncaught TypeError: Cannot read property \'className\' of undefined

Answer 1

In my specific case, I had the aTargets properties set with array indices outside the bounds for my elements.

$('.datatable').dataTable({
  aoColumnDefs: [
    {
      bSortable: false,
      aTargets: [0, 6]
    }
  ],
  aaSorting: []
});

This set that there were 7 td columns, but there were only 6. Changing it to the following corrected it:

$('.datatable').dataTable({
  aoColumnDefs: [
    {
      bSortable: false,
      aTargets: [0, 5]
    }
  ],
  aaSorting: []
});