Currently its possible to set static attributes or CSS classes to kendo grid columns by specifying then in column definition:

var columns = [{ field: 'someData', title: 'Some Data', attributes { 'class': 'some-css'} }];

Please add possibility to add custom attributes or CSS Classes dynamically (depending on data row):

var columns = [{ field: 'someData', title: 'Some Data', attributes { 'class': function(dataRow){ return dataRow.data > 1 ? 'css-go-up': 'css-go-down' }} }];

Just similar how it works with template for column.

Thanks,
Val