drupal/core/misc/dialog/dialog.jquery-ui.js

/**
* DO NOT EDIT THIS FILE.
* See the following change record for more information,
* https://www.drupal.org/node/2815083
* @preserve
**/

(function ($) {
  $.widget('ui.dialog', $.ui.dialog, {
    options: {
      buttonClass: 'button',
      buttonPrimaryClass: 'button--primary'
    },
    _createButtons: function _createButtons() {
      var opts = this.options;
      var primaryIndex;
      var index;
      var il = opts.buttons.length;

      for (index = 0; index < il; index++) {
        if (opts.buttons[index].primary && opts.buttons[index].primary === true) {
          primaryIndex = index;
          delete opts.buttons[index].primary;
          break;
        }
      }

      this._super();

      var $buttons = this.uiButtonSet.children().addClass(opts.buttonClass);

      if (typeof primaryIndex !== 'undefined') {
        $buttons.eq(index).addClass(opts.buttonPrimaryClass);
      }
    }
  });
})(jQuery);