confirm.js

(function($) {
  $('.confirm').click(function() {
    var $button = $(this);
    
    $.ajax({
      url: '/confirm',
      method: 'POST',
      data: {
        userID: $button.data('id')
      },
      success: function( response ) {
        $button.attr('disabled');
      }
  });
})(jQuery);