export declare enum MenuViewportDataAttributes {
  /**
   * Applied to the direct child of the viewport when no transitions are present or the new content when it's entering.
   */
  current = "data-current",
  /**
   * Applied to the direct child of the viewport that contains the exiting content when transitions are present.
   */
  previous = "data-previous",
  /**
   * Indicates the direction from which the popup was activated.
   * This can be used to create directional animations based on how the popup was triggered.
   * Contains space-separated values for both horizontal and vertical axes.
   * @type {`${'left' | 'right'} {'down' | 'up'}`}
   */
  activationDirection = "data-activation-direction",
  /**
   * Indicates that the viewport is currently transitioning between old and new content.
   */
  transitioning = "data-transitioning",
  /**
   * Present if animations should be instant.
   * @type {'click' | 'dismiss' | 'group' | 'trigger-change'}
   */
  instant = "data-instant",
}