/**
 * Applied to the direct child of the viewport when no transitions are present or the new content when it's entering.
 */
export declare const current = "data-current";
/**
 * Applied to the direct child of the viewport that contains the exiting content when transitions are present.
 */
export declare const 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' | ''}`}
 */
export declare const activationDirection = "data-activation-direction";
/**
 * Indicates that the viewport is currently transitioning between old and new content.
 */
export declare const transitioning = "data-transitioning";
/**
 * Present if animations should be instant.
 * @type {'dismiss' | 'focus'}
 */
export declare const instant = "data-instant";