cell nowrap isn't working

Documentation on cell styling at https://datatables.net/manual/styling/classes#Cell-classes says that "dt-nowrap" will prevent the text in a cell from wrapping. I am using

columnDefs: [
{
targets: 0,
className: "dt-nowrap",

but the text is still wrapping.

Here's what the table looks like:
Image may be NSFW.
Clik here to view.