How to cancel fancybox function?

Question

JavaScript

The link has a .fancybox class. How to cancel this function on click?
This didn't help:

$('.Gallery').find('ul li a.fancybox').on('click', function(e){
  e.preventDefault;
});

Answer 1

Remove class

Answer 2

what do you mean by cancel? Do you want to cancel some event that occurs on click?