Sorry for the simplicity of this question, but I can't seem to find an answer anywhere. Is there an existing sales hook in woocommerce?

Like:

<?php
   if ( on_sale == 0 ) {
     echo '<style>.specials {display:none;};
     }
?>

That is essentially all I am trying to accomplish. I have a row/column that displays products on sale... I just want to hide that if there are currently no products on sale.

Thanks in advance.