Hello,

Try to replace the code with the following one instead

function smallBtn(){
	jQuery('.woodmart-hover-base').each(function () {
		var $el = jQuery(this),
				$elBtn = $el.find('.woodmart-add-btn');
		$el.addClass('add-small-content');
		$elBtn.addClass('wd-action-btn wd-add-cart-btn wd-style-icon');
	});
}
smallBtn();
jQuery(document).on('pjax:end', function () {
	smallBtn();
});

Regards