You need to prevent the browser from following the link.
You'll also need to navigate to the link, or perform an AJAX request, when the user confirms the deletion. Otherwise, nothing will actually be deleted.
$('#UserFacultyTable tbody').on('click', 'id="del"', function (e) {
e.preventDefault();
const url = this.href;
Swal.fire({
...
}).then(result => {
if (result.isConfirmed) {
location.assign(url);
}
});
});